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Journal articles on the topic 'Induction coil parameter'
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1
B, Patidar, M.T.Saify, M.M.Hussain, S.K.Jha, and A.P.Tiwari. "Analytical, Numerical and Experimental Validation of Coil Voltage in Induction Melting Process." International Journal of Electromagnetics ( IJEL ) 1, no. 1 (2020): 21 to 32. https://doi.org/10.5281/zenodo.3762965.
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This paper presents, mathematical model of induction heating process by using analytical and numerical methods. In analytical method, series equivalent circuit (SEC) is used to represent induction coil and work piece. Induction coil and workpiece parameters (resistance and reactance) are calculated by standard formulas along with Nagaoka correction factors and Bessel functions. In Numerical method, magnetic vector potential formulation is done and finite element method (FEM) is used to solve the field equations. Analytically and numerically computed parameters such as equivalent coil resistance, reactance, coil voltage, work piece power are compared and found that they are in good agreement. Analytically and numerically obtained coil voltages at different frequencies are validated by experimental results. This mathematical model is useful for coil design and optimization of induction heating process.
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Gergely, Raphael. "Investigation of Induction Heating for Sheet Metal with Moving Induction Coil." International Journal of Electrical and Electronic Engineering & Telecommunications 13, no. 4 (2024): 317–22. http://dx.doi.org/10.18178/ijeetc.13.4.317-322.
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The efficiency of induction heating is highly dependent on the coil geometry and the air gap between the coil and the workpiece, therefore the aim of this research is to experimentally evaluate the efficiency and uniformity of temperature distribution in induction heating, utilizing an inductor coil, movable in three axes. The experiment is conducted under the condition that the inductor coil is not tailored for the specific workpiece, giving it a higher flexibility compared to the conventional application of induction heating. To achieve this objective, a downscaled test bench was designed, employing a CNC machine for execution. In addition, in this study, a second test bench was built to establish an analytical approach in determining the parameter field between power, air gap and efficiency. The steady-state conditions in this test bench allowed the closure of the energy balances to be calculated analytically, allowing immediate validation of the accuracy of the results. This parameter field was utilized to evaluate the outcomes of the moving inductor experiments.
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Ghimire, Kshitij. "Coil Parameter Analysis in Wireless Electric Vehicle Charging." International Journal of Electrical Engineering and Computer Science 4 (December 31, 2022): 101–9. http://dx.doi.org/10.37394/232027.2022.4.15.
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The hassle of using plug-in charging for electric vehicles (EVs) such as connecting charger to the port of vehicles, risk of getting electrocuted during rain, dirty and oily charging cable etc. can be eliminated using wireless/induction power transfer (IPT). It can be made smart and automated. Hence, IPT can be considered the future of EV charging. However, the technology is just emerging and there are a lot of limitations at present. The major problems are less efficiency caused by coil misalignment and air gap, and the electro-magnetic field generated around the coils which possesses greater risk for human health. These can be improved by selecting the types of coils and shields which produce maximum magnetic flux between the coils whereas reduce the flux outside the coils. In this research, the strength of magnetic fields produced by various types of coils (circular, square and hexagonal) were simulated in Ansys Maxwell 3D to understand their features and to know which coil is the best for high power transfer efficiency. Similarly, the effects of using ferrite and aluminum shields for leakage reduction, by varying their thickness, were studied. Finally, the leakage flux values were simulated at very high currents to understand their behavior in such conditions.
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Shi, Xiaona, Kelong Wang, Guochao Li, et al. "Study on Temperature Field Uniformity of Dynamic Induction Heating for Camshaft of Marine Diesel Engine." Machines 12, no. 4 (2024): 215. http://dx.doi.org/10.3390/machines12040215.
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This paper focuses on the study of the induction heating process of a camshaft in a marine diesel engine. A three-dimensional finite element model for dynamic induction heating is established using the finite element method of multi-physical field coupling, aiming to investigate the temperature uniformity of the cam during this process. Three elements are analyzed in this study: the moving speed, the gap between the induction coil and the workpiece, and the width of the induction coil. These factors allow for an analysis of the temperature distribution in the thickness direction and contour line direction of the cam under various conditions. On this basis, an equivalent parameter about the temperature uniformity in the thickness direction of the cam is proposed to guide the selection of the camshaft induction heating process parameters.
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Hariz Santoso, Asfari, Rhezal Agung Ananto, Ahmad Hermawan, and Sri Wahyuni Dali. "Desain Motor Kapasitor Dua Fasa Simetris 1 kW." Elposys: Jurnal Sistem Kelistrikan 11, no. 1 (2024): 40–44. http://dx.doi.org/10.33795/elposys.v11i1.4507.
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Single phase induction motors are one of the most frequently used types of motors because of their economical, sturdy, simple and easy maintenance advantages. One application is for electric vehicles. When single phase induction motors are applied to electric vehicles there are problems related to torque regulation based on vehicle operating conditions where when operating on light road conditions the torque produced by the motor remains high. In this research, a single-phase induction motor was made to have the same proportion of torque produced by the main coil and auxiliary coil or a 1kW 1000 rpm symmetrical two-phase induction motor. The type of winding applied to the stator is divided screws with the main and auxiliary coils each occupying 18 stator slots, 45 conductors per slots,, with a conductor diameter of 1.2 mm. As a phase shifter at start and operation so that they differ by 90°, a capacitance of 505.51 µF is used. As a result of the winding modification, the induction motor parameter values for each stator winding are the same. So the starting torque of the main and auxiliary coils is 3.89 Nm and 3.88 Nm respectively and the nominal torque produced by the main and auxiliary coils is 4.28 Nm and 4.29 Nm respectively.
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Marpaung, Parlindungan Pandapotan. "EFEK KENAIKAN SUHU DAPUR INDUKSI ELEKTROMAGNETIK ALTERNATOR TERHADAP PERUBAHAN RESISTANSI LILITAN STATOR." Jurnal Poli-Teknologi 21, no. 2 (2022): 71–77. http://dx.doi.org/10.32722/pt.v21i2.4506.
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In this study, the design of the ac power plant equipment using an alternator derived from a motorcycle was carried out to produce an ac output voltage in the stator coil winding based on the electromagnetic induction process. The problem is that the ac output voltage flows rotary current or eddy current through the coil windings causing heat in the core plane which is in the alternator electromagnetic induction furnace. The initial condition of the electromagnetic induction alternator temperature is Tind(awal) = 30 oC, coil resistance Rt(awal) = 1.28 ohms and ac output voltage Vo(awal) = 12.68 volts. The research method was carried out by increasing the Tind parameter initial causing the effect of increasing the resistance of the conductor coil winding material as the output voltage decreased. The specification of the temperature coefficient of the coil conducting conductor is 0.0291 oC-1 the temperature increase of the electromagnetic induction alternator is Tind. 62 oC causes the effect of increasing the coil resistance as the output voltage decreases to Vo(temp.) = 7.68 volts ac. This decrease in the ac output voltage of the alternator causes the electricity supply to the automotive electrical load to become ineffective and inefficient. 
 Keywords: alternator ; electromagnetic induction ; coil windin ; temperature coefficient ; initial conditions
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Orosz, Tamás, Miklós Csizmadia, and Balázs Nagy. "Numerical Modeling and Optimization of a Quasi-Resonant Inverter-Based Induction Heating Process of a Magnetic Gear." Energies 17, no. 16 (2024): 4130. http://dx.doi.org/10.3390/en17164130.
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Induction heating is a clear, cheap, and highly effective technology used for many industrial and commercial applications. Generally, a time-varying magnetic field produces the required heat in the workpiece with a specially designed coil. The efficiency of the heating process depends highly on the coil design and the geometrical arrangement. A detailed and accurate finite element analysis of the induction heating process usually needs to resolve a coupled thermoelastic–magnetic problem, whose parameters values depend on the solution of another field. The paper deals with a shrink-fitting process design problem: a gear should be assembled with an axe. The interesting part of this case study is given the prescribed low limits for critical stress, the temperature of the gear material, and the heat-treated wearing surfaces. A coupled finite-element-based model and a genetic algorithm-based parameter determination methodology were presented. A thermal imaging-based measurement validated the presented numerical model and parameter determination task. The results show that the proposed methodology can be used to calibrate and validate the numerical model and optimize an induction heating process.
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Liu, Anqi, Zhan Wang, and Yong Zhang. "Research on pulse induction metal detector probe based on finite element simulation." Journal of Physics: Conference Series 2964, no. 1 (2025): 012024. https://doi.org/10.1088/1742-6596/2964/1/012024.
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Abstract Metal detection technology based on the principle of electromagnetic induction has always played an important role in the field of mine detection. In metal detectors, the probe coil is an essential component, and its performance affects the overall performance of the system. This paper introduces the basic principles of pulsed electromagnetic induction and constructs a model of the metal detector probe using the finite element electromagnetic simulation software Ansys Maxwell. The study explores the impact of the coil shape and radius, the number of turns, and the coil current on the primary field generated by the probe coil, as well as the influence of different metallic target materials on the secondary field received by the coil. Finally, the effectiveness of the simulation is verified by the experiments. The research findings have certain reference significance for optimizing the best parameter configuration of the probe coil.
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Fan, Bin, Lianfu Wang, Yong Liu, Peng Zhang, and Song Feng. "Simulation and Optimization Design of Inductive Wear Particle Sensor." Sensors 23, no. 10 (2023): 4890. http://dx.doi.org/10.3390/s23104890.
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In order to monitor the diagnosis of mechanical equipment by monitoring the metal wear particles carried in large aperture lubricating oil tubes, the simulation optimization structure design was carried out based on the traditional three-coil inductance wear particle sensor. The numerical model of electromotive force induced by the wear particle sensor was established, and the coil distance and coil turns were simulated by finite element analysis software. When permalloy is covered on the surface of the excitation coil and induction coil, the background magnetic field at the air gap increases, and the induced electromotive force amplitude generated by wear particles is increased. The effect of alloy thickness on the induced voltage and magnetic field was analyzed to determine the optimum thickness, and increase the induction voltage of the alloy chamfer detection at the air gap. The optimal parameter structure was determined to improve the detection ability of the sensor. Ultimately, by comparing the extreme values of the induced voltage of various types of sensors, the simulation determined that the minimum allowable detection of the optimal sensor was 27.5 µm ferromagnetic particles.
10
Wessapan, Teerapot, Phadungsak Rattanadecho, Nisakorn Somsuk, Manop Yamfang, Manaporn Guptasa, and Prempreeya Montienthong. "Thermal Effects of Electromagnetic Energy on Skin in Contact with Metal: A Numerical Analysis." Energies 16, no. 16 (2023): 5925. http://dx.doi.org/10.3390/en16165925.
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It has been well recognized that interactions between electromagnetic fields and metals are very strong. The consequence of human tissue in contact with metal, when subjected to an alternating electromagnetic field, is an increase in tissue temperature, which results from metals absorbing the energy obtained through induction. However, the electromagnetic induction characteristics and tissue energy absorbed caused by various electromagnetic field exposure conditions have not been well understood. A computational model was developed and employed in this study to assess the temporal and spatial temperature increases in skin due to contact with a highly conductive metallic plate while subjected to a high-intensity electromagnetic field. The effects of plate material, plate thickness, coil distance, and exposure time on temperature increase in the skin were computationally investigated. The electromagnetic and temperature distributions in skin layers during exposure to electromagnetic fields were achieved using models of electromagnetic wave propagation and an unsteady bioheat transfer. The modeling approach used indicates that the plate thickness, plate material, coil distance, and exposure time have a significant impact on the temperature change in the skin. The most important parameter was found to be the metal type. Iron has the greatest effect on skin temperature increase when subjected to external electromagnetic induction. These results allow the researchers to estimate more precisely the exposure limits for induction coils.
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Kang, Zhengming, Yi Zhang, Binbin Hou, et al. "Using the multi-component induction logging data to evaluate the geometric parameters of the hydraulic fracture." Journal of Geophysics and Engineering 19, no. 5 (2022): 1163–79. http://dx.doi.org/10.1093/jge/gxac076.
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Abstract Hydraulic fracturing technology can effectively improve the seepage capacity of low-porosity and -permeability reservoirs. Geometric parameters evaluation (height, aperture and length) of hydraulic fracture is essential at different stages of fracturing. This paper presents a new method to evaluate the three parameters of small-scale fractures by multi-component induction logging based on numerical simulations. First, the model of calculation of the induced electric field with vertical hydraulic fractures is established using a three-dimensional finite element method (3D FEM), and the algorithm is verified correctly by comparing it with the analytical solution. Five coil systems of xx, xz, yy, yz and zz that are sensitive to the geometric parameters of the fracture are determined. The relationships between the geometric parameters of the fracture and the measurement signals of five coils are then investigated. The results show that the length and aperture of the fracture have a power exponent relationship with the measurement voltage, while the height parameter is closely related to the logging curves. Based on the relationships, the calculation models of the geometric parameters are established and the applicable range of it is analyzed. It is demonstrated that the complete characterization of fracture geometric can be realized by combining multi-spacing and multi-coil systems. Finally, the influence of the borehole and surrounding formation on the measurements is also considered, and the results indicate that the resistivity of the formation has less influence on the signals than the resistivity of the mud. Compared to the current instrument, the new method can evaluate all three geometric parameters of the hydraulic fracture.
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Park, Sang Min, Eunsu Jang, Dongmyoung Joo, and Byoung Kuk Lee. "Power Curve-Fitting Control Method with Temperature Compensation and Fast-Response for All-Metal Domestic Induction Heating Systems." Energies 12, no. 15 (2019): 2915. http://dx.doi.org/10.3390/en12152915.
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Typical domestic induction cooktops can only heat ferromagnetic pots/vessels. However, to increase the availability and marketability of induction heating (IH) cooktop products, heating techniques for all types of metallic pots (i.e., created from metals such as aluminum, copper, and stainless steel) are required. To satisfy the requirements of induction cooktops, this paper proposes the design of an all-metal domestic IH system that can heat any type of metallic pot while considering the temperature variation of the working-coil. A control algorithm using a power curve-fitting method (CFM) is presented to quickly respond to load parameter variations in the IH. In addition, the CFM control algorithm is established to compensate for the power reference value by reflecting the increase in the working-coil temperature during the heating of the non-ferromagnetic pot. To evaluate the performance of the proposed system, the control algorithm strategy and experimental results based on a 3.2 kW all-metal IH cooktop are presented.
13
Hongjun Xiang, Bin Lei, Zhiyuan Li, et al. "Analysis of Parameter Sensitivity of Induction Coil Launcher Based on Orthogonal Experimental Method." IEEE Transactions on Plasma Science 43, no. 5 (2015): 1198–202. http://dx.doi.org/10.1109/tps.2015.2404439.
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Stupakov, Oleksandr, and Peter Švec. "Three–Parameter Feedback Control of Amorphous Ribbon Magnetization." Journal of Electrical Engineering 64, no. 3 (2013): 166–72. http://dx.doi.org/10.2478/jee-2013-0024.
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This work describes a specially developed software for controllable magnetic hysteresis measurements of amorphous and nanocrystalline ribbons. The sophisticated algorithm enables to simplify a hardware design and to suppress an influence of experimental conditions on the measurement results. The main software feature is a three-stage feedback algorithm, which accurately adjusts the magnetization conditions: magnetization amplitude, geomagnetic bias and magnetization waveform. Air flux compensation of the induction signal is also performed by the software using an effective value of the coil cross section obtained from a calibration measurement without the ribbon. Applicability of the designed setup is illustrated for a series of nanocrystalline Hitperm ribbons measured at the power-line conditions: 50 Hz frequency and sinusoidal magnetization waveform.
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Liu, Peizhou, Tiande Gao, and Zhaoyong Mao. "Analysis of the Mutual Impedance of Coils Immersed in Water." Magnetochemistry 7, no. 8 (2021): 113. http://dx.doi.org/10.3390/magnetochemistry7080113.
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Magnetic induction communication and wireless power transmission based on magnetic coupling have significant application prospects in underwater environments. Mutual impedance is a key parameter particularly required for the design of the systems. However, mutual impedance is usually extracted from measurements when the coils are processed, which is obviously not conducive to the system optimization in the design phase. In this paper, a model of the mutual impedance of coils immersed in water is established. The magnetic vector potential is expressed in the form of series by artificially setting a boundary, and then the mutual impedance calculation formula of the coils immersed in water is derived. In the analysis, the effect of the conductivity of water, the excitation frequency, and the number of turns of the coils are mainly taken into account. In addition, the variation of the mutual impedance of coils in air and water with axial displacement is also compared. The models can be used to analyze the coil coupling characteristics in the presence of conductive medium, which is helpful for the design process.
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Levshin, G. E. "Magnetization of ferromagnetic charge at induction heating." Izvestiya. Ferrous Metallurgy 65, no. 2 (2022): 85–91. http://dx.doi.org/10.17073/0368-0797-2022-2-85-91.
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The article presents analysis of magnetization and heating of ferromagnetic charge in crucibles of induction furnaces of two types. In inductor furnaces, the charge is magnetized by a vertical electromagnetic flow, and in electromagnetic furnaces with a curved U-, C-, or O-shaped magnetic circuit (MPr) – by a horizontal flow. Knowledge of these largely general magnetization processes is insufficient. Bi magnetic induction in charge material is rather important. There are difficulties in determining this parameter during magnetization of a single piece of charge and other magnetic quantities associated with it: Bm induction and Nm strength of the demagnetizing field, N demagnetization coefficient, M magnetization, magnetic permeabilities of μi substance and μt body, km susceptibility, etc. Difficulties increase at magnetization, if it is a porous body with crucible volume of ~V t and a factor of filling with ferromagnetic pieces of this volume of Kv ≤ 0.5. It also creates a demagnetizing field with Bmt induction and Hmt strength. Beyond that, pores have an additional demagnetizing effect. Therefore, the induction Вiт in a porous body is less than the induction Вi in a solid one. To compare magnetization of ferromagnetic charge with horizontal and vertical flows with frequency of 50 Hz, modeling experiments were carried out with the samples of DSL08 unconsolidated shot from high-carbon steel (GOST 11964 – 83) with Kv ≈ 0.53. The samples were placed in the inductor and between the poles of a U-shaped core piece. Induction was measured by a cylindrical and flat probe unit of Sh1-15 militeslameter in air and in the sample. An advantage of electromagnetic furnace over an inductor one is more uniform distribution of Bi induction in charge and its significant excess (1.7 times) over the Be induction in a furnace working cavity, which indicates more efficient use of electromagnetic energy in this furnace during heating. The author proposed to control Вi induction when heating the charge by the ammeter-voltmeter method using measuring coil made of heat-resistant wire.
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Kapusta, Juraj, Juraj Camber, and Gabriel Hulkó. "Steel Billet Continuous Induction Heating – Numerical Model and Advanced Control." Applied Mechanics and Materials 378 (August 2013): 520–28. http://dx.doi.org/10.4028/www.scientific.net/amm.378.520.
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Nowadays, the achievement of proper steel billets temperature profile is not the only design priority of induction heaters for hot forming applications. Due to its high operating costs, its design is constantly improving in terms of electrical and thermal efficiency. Therefore the more efficient multi-coil design starts to be more used in industrial practice. Numerical model of mentioned heater based on partial differential equations were solved by finite element method in virtual software environment. Primary goal of computer modeling was to investigate the thermal dynamics of four-module heater working in steady-state operation regime. Obtained data were applied to design an advanced control circuit based on distributed parameter systems theory. This may open up the opportunity to make further progress in induction heaters design.
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Ridzki, Imron, Asfari Hariz Santoso, and Ahmad Hermawan. "Analisis perbandingan tipe belitan terhadap nilai parameter motor induksi satu fasa." JURNAL ELTEK 20, no. 1 (2022): 33. http://dx.doi.org/10.33795/eltek.v20i1.318.
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ABSTRAK
 Motor induksi merupakan salah satu motor listrik yang luas penggunaannya. Salah satu jenis motor induksi adalah motor induksi satu fasa. Pada kondisi tertentu motor induksi perlu dilakukan rewinding pada kumparannya. Proses rewinding sebelumnya harus ditentukan jumlah kutub, tipe belitan, dimensi konduktor, serta jumlah lilitnya. Praktik di lapangan ketika melakukan proses rewinding umummya hanya memperhatikan jumlah kutub, akan tetapi tipe belitan tidak begitu diperhatikan secara khusus. Pada dasaranya setiap tipe belitan menghasilkan gaya gerak magnit (mmf) yang berbeda-beda, yang mana mmf tersebut mengandung komponen fundamental dan komponen harmonisanya. Hal ini akan berakibat fluksi yang dihasilkan juga berbeda. Dimana fluksi juga mempunyai peran pada nilai parameter motor induksi satu fasa. Pada penelitian ini dilakukan proses rewinding pada dua motor induksi dengan konstruksi yang sama, motor induksi pertama (M1) dengan tipe belitan terbagi-skrew dan motor induksi kedua (M2) dengan tipe belitan terpusat terdistribusi, kemudian dilakukan pengujian untuk mengetahui paramater motor induksi hasil rewinding. Hasil pengujian didapatkan perbedaan nilai reaktansi dimana M1 nilai reaktansi kumparan stator dan rotornya berturut-turut 5,71 Ω dan 5,71 Ω, pada M2 nilai reaktansi stator dan rotornya berturut-turut 5,98 Ω dan 5,98 Ω. Analisis perbedaan nilai reaktansi motor induksi tersebut dilakukan analisis finite element menggunakan perangkat lunak FEMM 4.2.
 
 ABSTRACT
 The single-phase induction motor is one of the most widely used electric motors. Under certain conditions, the induction motor needs to be rewinded on the coil. The rewinding process must determine the number of poles, the type of winding, the dimensions of the conductor, and the number of turns. Generally, when carrying out the rewinding process, the winding type is not given much special attention. Where each type of winding produces a different magnetomotive force (mmf). This will result in different fluxes resulting in different parameter values for single-phase induction motors. In this study, a comparison of the parameters of an induction motor with the same construction and with different winding types will be carried out. The first motor (M1) is of the screw-shared winding type and the second motor (M2) is of the distributed concentrated winding type. The test results show a difference in the reactance value where M1 the reactance values of the stator and rotor coils are 5.71 Ω and 5.71 Ω, respectively, while in M2 the stator and rotor reactance values are 5.98 Ω and 5.98 Ω, respectively. The difference in reactance values was carried out by finite element analysis using FEMM 4.2.
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Huang, Wencong, Cheng Shu, Aoli Wang, Yufang Chang, and Huaicheng Yan. "Improved Electric Eel Foraging Algorithm for Shielding Optimization of Wireless Power Transfer Systems." Electronics 14, no. 5 (2025): 906. https://doi.org/10.3390/electronics14050906.
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There is a problem of magnetic leakage in the charging process of wireless power transfer systems, which can threaten human safety and affect the normal operation of electronic equipment. In this paper, the wireless power transfer system adopts a bilateral LCCS hybrid topology to address this problem. It proposes a magnetic field shielding suppression method based on the improved electric eel foraging optimization algorithm. Firstly, the Fuch infinite folding chaos strategy and the Cauchy–Gauss variation strategy are introduced to optimize the electric eel foraging optimization algorithm, which further improves the global optimal parameter search capability of the improved electric eel foraging optimization algorithm. Then, the improved electric eel foraging optimization algorithm is proposed to perform a parameter search for the inductance of the shielded coil. Finally, simulation and experimental verification show that when the shielding coil inductance is optimal, the method proposed in this paper can effectively shield and suppress the magnetic leakage of the system, reducing the magnetic leakage field by 67.05%. The magnetic induction intensity in the space region meets the international safety standards, which verifies the effectiveness and feasibility of the method.
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Chávez, José Antonio Manco Chávez, Joel Núñez Mejía, Haydeé Verónica Túllume Huayanay, Daniel Enrique Terrones Rojas, Rolando Juan Borja Torres, and Carlos Héctor Cerna Gonzales. "Simulation of magnetic field produced by induction in toroid and solenoid using GeoGebra software." Journal of Posthumanism 5, no. 2 (2025): 85–104. https://doi.org/10.63332/joph.v5i2.406.
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In today’s era of modernity and the appearance of new knowledge-construction approaches supported by technological tools such as A.I., various instruments contribute to enhancing educational quality like GeoGebra, an open-source software with extensive capabilities for simulations. This research established three objectives, all of which are answered in its conclusions. The study focused on simulating magnetic fields with predefined geometric shapes, analyzed using mathematical principles. Computational simulation was the primary methodology, involving the implementation of Ampere’s law, Biot-Savart law, and electromagnetism, as well as their applications in solenoids and toroids. The simulations were developed using GeoGebra’s virtual simulation tools and Java Script application. As a result, a functional simulation was created to model the behavior of a normally closed solenoid valve, allowing manipulation of parameters such as radius, length, number of turns, diameter and current intensity. Similarly, a toroidal transformer simulation was developed, enabling adjustments to coil count, toroidal surface area, voltage, primary and secondary toroids to control each parameter in the respective model. The discussion highlights that similar applications have been successfully developed by other researchers, demonstrating their effectiveness in supporting university students’ learning. The study concludes that simulations significantly strengthen foundational physics knowledge in engineering education.
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Wilken, Dennis, Moritz Mercker, Peter Fischer, et al. "Artificial Bee Colony Algorithm with Adaptive Parameter Space Dimension: A Promising Tool for Geophysical Electromagnetic Induction Inversion." Remote Sensing 16, no. 3 (2024): 470. http://dx.doi.org/10.3390/rs16030470.
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Frequency-domain electromagnetic induction (FDEMI) methods are frequently used in non-invasive, area-wise mapping of the subsurface electromagnetic soil properties. A crucial part of data analysis is the geophysical inversion of the data, resulting in either conductivity and/or magnetic susceptibility subsurface distributions. We present a novel 1D stochastic optimization approach that combines dimension-adapting reversible jump Markov chain Monte Carlo (MCMC) with artificial bee colony (ABC) optimization for geophysical inversion, with specific application to frequency-domain electromagnetic induction (FDEMI) data. Several solution models of simplified model geometry and a variable number of model knots, which are found by the inversion method, are used to create re-sampled resulting average models. We present synthetic test inversions using conductivity models based on 14 direct-push (DP) EC logs from Greece, Italy, and Germany, as well as field data applications using multi-coil FDEMI devices from three sites in Azerbaijan and Germany. These examples show that the method can effectively lead to solutions that resemble the known DP input models or image reasonable stratigraphic and archaeological features in the field data. Neighboring 1D solutions on field data examples show high coherence along profiles even though each 1D inversion is independently handled. The computational effort for one 1D inversion is less than 120,000 forward calculations, which is much less than usually needed in MCMC inversions, whereas the resulting models show more plausible solutions due to the dimension-adapting properties of the inversion method.
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Zamudio-Ramirez, Israel, Roque Alfredo Osornio-Rios, Miguel Trejo-Hernandez, Rene de Jesus Romero-Troncoso, and Jose Alfonso Antonino-Daviu. "Smart-Sensors to Estimate Insulation Health in Induction Motors via Analysis of Stray Flux." Energies 12, no. 9 (2019): 1658. http://dx.doi.org/10.3390/en12091658.
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Induction motors (IMs) are essential components in industrial applications. These motors have to perform numerous tasks under a wide variety of conditions, which affects performance and reliability and gradually brings faults and efficiency losses over time. Nowadays, the industrial sector demands the necessary integration of smart-sensors to effectively diagnose faults in these kinds of motors before faults can occur. One of the most frequent causes of failure in IMs is the degradation of turn insulation in windings. If this anomaly is present, an electric motor can keep working with apparent normality, but factors such as the efficiency of energy consumption and mechanical reliability may be reduced considerably. Furthermore, if not detected at an early stage, this degradation could lead to the breakdown of the insulation system, which could in turn cause catastrophic and irreversible failure to the electrical machine. This paper proposes a novel methodology and its application in a smart-sensor to detect and estimate the healthiness of the winding insulation in IMs. This methodology relies on the analysis of the external magnetic field captured by a coil sensor by applying suitable time-frequency decomposition (TFD) tools. The discrete wavelet transform (DWT) is used to decompose the signal into different approximation and detail coefficients as a pre-processing stage to isolate the studied fault. Then, due to the importance of diagnosing stator winding insulation faults during motor operation at an early stage, this proposal introduces an indicator based on wavelet entropy (WE), a single parameter capable of performing an efficient diagnosis. A smart-sensor is able to estimate winding insulation degradation in IMs using two inexpensive, reliable, and noninvasive primary sensors: a coil sensor and an E-type thermocouple sensor. The utility of these sensors is demonstrated through the results obtained from analyzing six similar IMs with differently induced severity faults.
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Truţă, Călin, Adrian Amzoi, and Dumitru Barbos. "Reliability in Microjoining Processes for Instrumented Nuclear Fuel Element Fabrication." Advanced Materials Research 1157 (February 2020): 31–37. http://dx.doi.org/10.4028/www.scientific.net/amr.1157.31.
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The paper presents the assembling flux of thermocouple-instrumented nuclear fuel element for research reactor, from the point of view of the welding / brazing engineer, considering nuclear quality and safety requirements: fuel element structural reliability (no radioactive leaks through joints) and temperature signal reliability (thermocouple sheath integrity), this signal being an essential parameter for reactor normal operation and emergency shut-down. The paper is a real case study for an experimental instrumented element recently developed at INR-Pitesti describing technology choices as balance between fabrication complexity and risk of failure in joining processes, especially in later stages when added value increases. All joints (welded or brazed) fall into microjoining category, and it is shown how some special provisions may influence reliability. Focus is put on brazing thin-walled Inconel sheathed thermocouples, where erosion and local loss of ductility are known issues, leading to sheath rupture. Choosing as filler the less aggressive BNi-9 helped too little. A simple but efficient technique has been developed to address this matter adequate to narrow spaces inside a nuclear fuel element, where no room is available for solutions described in literature e.g. distal preplacing of filler. The solution prevents sheath from having prolonged contact with large volume of molten filler by using locally a miniature barrier (thin stainless-steel coil or sleeve) which only allows capillary wetting, being also a perfect real-time visual indicator of brazing progress and completion. As proved in the present paper, this method along with using filler formulation with lower Carbon content (without organic binder) enhances significantly, 8 times at least, resistance to bending fatigue. A particular vacuum brazing chamber design is employed: narrow quartz tube with external induction coil and top fitting letting outside the long thermocouples attached, reducing much the chamber volume and degassing. Careful impedance match is therefore required to overcome induction power loss due to the larger coil-to-workpiece gap. Additional joining problems are discussed e.g. inherent differential expansion of long parts during induction heating which afterwards may put tension upon braze during solidification and determine delayed cracking, this being avoided through wise order of operations. Another concern is the final precision weld between instrumentation segment having attached the hard-to-handle long thermocouples bunch and nuclear segment with the heavy Uranium pellets. The result of this research is successful assembling of first Romanian prototype with joints exhibiting He leak rate bellow 1E-09 std.cc/sec and overall reliability proved during reactor irradiation testing.
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Hunkeler, Priska A., Stefan Hendricks, Mario Hoppmann, et al. "Improved 1D inversions for sea ice thickness and conductivity from electromagnetic induction data: Inclusion of nonlinearities caused by passive bucking." GEOPHYSICS 81, no. 1 (2016): WA45—WA58. http://dx.doi.org/10.1190/geo2015-0130.1.
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The porosity of sea ice is a fundamental physical parameter that governs the mechanical strength of sea ice and the mobility of gases and nutrients for biological processes and biogeochemical cycles in the sea ice layer. However, little is known about the spatial distribution of the sea ice porosity and its variability between different sea ice types; an efficient and nondestructive method to measure this property is currently missing. Sea ice porosity is linked to the bulk electrical conductivity of sea ice, a parameter routinely used to discriminate between sea ice and seawater by electromagnetic (EM) induction sensors. Here, we have evaluated the prospect of porosity retrieval of sea ice by means of bulk conductivity estimates using 1D multifrequency EM inversion schemes. We have focused on two inversion algorithms, a smoothness-constrained inversion and a Marquardt-Levenberg inversion, which we modified for the nonlinear signal bias caused by a passive bucking coil operated in such a highly conductive environment. Using synthetic modeling studies, 1D inversion algorithms and multiple frequencies, we found that we can resolve the sea ice conductivity within [Formula: see text]. Using standard assumptions for the conductivity-porosity relation of sea ice, we were able to estimate porosity with an uncertainty of [Formula: see text], which enables efficient and nondestructive surveys of the internal state of the sea ice cover.
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Ornatsky, D. P., O. O. Krivokulska, O. O. Burbela, and O. D. Bliznyuk. "Measuring System for Non-Destructive Testing of Metal Rods." Metrology and instruments, no. 2 (May 21, 2020): 22–24. http://dx.doi.org/10.33955/2307-2180(2)2020.22-24.
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The control parameters of metal products using the eddy current method of nondestructive testing based on electromagnetic induction law is now widespread. Due to the high sensitivity over a wide frequency range of the ability to control the mechanical properties , uniformity of material, both magnetic and non-magnetic materials, beskonechnosti, high reliability, automation, process control, etc.
 The object of study is the process of interaction of external electromagnetic fields with defects in heterogeneity of structure in metal rod, causing a deformation of microtubuli currents and, accordingly, their influence on the inductance coil of the sensor. So, according to the law of electromagnetic induction eddy currents induced by an external electromagnetic field will be asking a private field that will oppose the external field that will lead to a change in inductance of the sensor coil. Therefore, the most informative parameter in this case is the relative change in inductance of the sensor.
 In the known designs use differential transformer sensors, transmission type, which differ in complexity of implementation, but have high sensitivity. In existing works not enough attention on improving of the metrological characteristics . Modern means of microstraava flaw detectors in the overwhelming number are for scientific research, but little attention is paid to tools that can be used in industrial processes, through a complex measurement process in the existing funds and the large volume of the software during automatic processing of information.
 In the presented work there is a system for nondestructive testing of metal bars with deprivation of the above-mentioned disadvantages, which would provide high metrological characteristics in a wide frequency range, separate measurement of impedance components of the sensor, which allows the reduction of methodological errors of determination of the main characteristics of the output signal of microstraava sensors.
 The scientific result is created sambalanco pavement system based on electronic dharamtala model of a vortex sensor with high metrological characteristics, which allows you to create real-time signal proportional to the amount of damage that will give you the opportunity to increase productivity in the quality control bar of metal products in a production environment.
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Porzig, Konstantin, Hartmut Brauer, and Hannes Toepfer. "The electric field induced by transcranial magnetic stimulation: A comparison between analytic and fem solutions." Serbian Journal of Electrical Engineering 11, no. 3 (2014): 403–18. http://dx.doi.org/10.2298/sjee140908029p.
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The induced electric field profiles in a homogeneous isotropic sphere, were calculated and compared between an analytic and a finite-element method in the framework of transcranial magnetic stimulation (TMS). This model can also be applied for concentric spheres in the framework of magnetic induction tomography (MIT), non destructive testing (NDT) or to calculate the lead field in magnetoencephalography (MEG). The calculations were performed using Eaton?s method as well as the finite-element program Comsol Multiphysics 4.2a (COMSOL Inc., Burlington, USA). A circular- and a figure-of-8 coil were used to operate as the sources of excitation. In our study the spherical volume conductor represents the human head consisting of grey matter. In order to quantify the differences between both methods an intense parameter study was performed. A comparison between both methods show a higher conformity than reported in previous studies. Regarding Eaton?s method, the influence of the maximum order of approximation L and the number of elements per winding K was investigated. The maximum relative difference was approximately 0.3% for L = 20 and K > 16. Furthermore the relative efficiency of the algorithm was calculated to save computational time. With the presented results it is possible to use Eaton?s method efficiently to compute the induced electric field profiles very quickly for example while searching for specific coil arrangements around the humans head, as in the case of deep brain transcranial magnetic stimulation (dTMS).
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Wilt, M. J., D. L. Alumbaugh, H. F. Morrison, A. Becker, K. H. Lee, and M. Deszcz‐Pan. "Crosswell electromagnetic tomography: System design considerations and field results." GEOPHYSICS 60, no. 3 (1995): 871–85. http://dx.doi.org/10.1190/1.1443823.
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Electrical conductivity is an important petroleum reservoir parameter because of its sensitivity to porosity, pore fluid type, and saturation. Although induction logs are widely used to obtain the conductivity near boreholes, the poor resolution offered by surface‐based electrical and electromagnetic (EM) field systems has thus far limited obtaining this information in the region between boreholes. Low‐frequency crosswell EM offers the promise of providing subsurface conductivity information at a much higher resolution than was previously possible. Researchers at Lawrence Livermore National Lab (LLNL) and Lawrence Berkeley Laboratories (LBL), together with an industrial consortium, recently began a program to conduct low‐frequency crosswell EM surveys and develop suitable inversion techniques for interpreting the data. In developing the field instrumentation we used off‐the‐shelf components whenever possible, but custom‐designed induction coil transmitters and receivers were built for the field experiments. The assembled field system has adequate power for moderate to high‐resolution imaging, using boreholes spaced up to 500 m apart. The initial field experiment was undertaken in flat lying terrain at the British Petroleum test site in Devine, Texas. Using wells spaced 100 m apart, we collected a complete crosswell EM data set encompassing a 30 m thick, 10 ohm‐m limestone layer at a depth of 600 m. The resulting profiles were repeatable to within 1% and showed an excellent sensitivity to the layered structure, closely matching the borehole induction resisitivity log. At the UC Richmond field station, crosswell EM measurements were made to track an injected slug of salt water. Conductivity images of data collected before and after injection showed a clear anomaly as a result of the salt water plume and indicated that the plume had migrated in a northerly direction from the injection borehole.
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Song, Ruo Feng, Li Ming Song, and Qian Ming Yang. "Simulation Analysis of Output Characteristic of the Inductive Displacement Transducer." Advanced Materials Research 571 (September 2012): 600–603. http://dx.doi.org/10.4028/www.scientific.net/amr.571.600.
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Aiming at the structure and electromagnetic induction characteristics of inductive displacement transducers, it is inevitable to appear the problem between nonlinearity output and temperature drift, by which it’s testing accuracy is affected, on the basis of analysis of structural characteristics and working principle of the inductive displacement sensor, mathematical model of the relationship between input and output has been constructed, which can be simulated and analyzed by MATLAB software. The results indicate that the inductive displacement transducer has an proximately linear extent ( ) and the linearity errors are influenced by the coils number and the semidiameter;In the case of relatively constant of other parameters, when the coil of radius and the number of coil turns are fixed ,there will be the core displacement x and , the sensor output characteristic has an favorable linearity under the circumstances of changing the coil radius and the number of turns in proper sequence; When ,the output property of the sensor appears worse linearity.
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Shi, Liwei, Junhao An, and Wenchao Zhang. "Topology Comparison Study of Five-Phase Wound-Field Doubly Salient Fault Tolerant Generators." Applied Sciences 9, no. 10 (2019): 2112. http://dx.doi.org/10.3390/app9102112.
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To present the characteristics of pole number and pole shape of the core, the five-phase wound-field doubly salient generators (WFDSGs) with symmetric phase inductance are studied and optimised in this paper, considering the split ratio, slot fill factor and core fringing effect. Based on the principle and structure of the five-phase WFDSGs, the winding induced electro-motive force under different number of poles is theoretically analysed. The constraints for parameter optimisation design including slot fill factor, split ratio and magnetic density characteristic are given. The finite element models of 30/24-pole and 20/16-pole WFDSG are established, and the comparative simulation analysis is carried out. It is pointed out that when the inner and outer diameters of the stator and rotor, the axial length and the maximum magnetic density are constant, the induction electromotive forces of the WFDSGs with different pole numbers and same phase coil number are same. Considering the pole fringing effect, the rotor pole equivalent width is the sum of the rotor pole actual width and 4 times of the air gap. The comparison experiments between the 30/24-pole and 20/16-pole WFDSGs were carried out, which verified the correctness of the theoretical analysis and finite element analysis (FEA).
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Erken, Ahmet, and Atiye Hulya Obdan. "Induction Coil Design Considerations for High-Frequency Domestic Cooktops." Applied Sciences 14, no. 17 (2024): 7996. http://dx.doi.org/10.3390/app14177996.
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The use of wide band gap (WBG) semiconductor switches in power converters is increasing day by day due to their superior chemical and physical properties, such as electrical field strength, drift speed, and thermal conductivity. These new-generation power switches offer advantages over traditional induction cooker systems, such as fast and environmentally friendly heating. The size of passive components can be reduced, and the decreasing inductance value of induction coils and capacitors with low ESR (equivalent series resistance) values contributes to total efficiency. Other design parameters, such as passive components with lower values, heatsinks with low volumes, cooling fans with low power, and induction coils with fewer turns, can offset the cost of WBG power devices. High-frequency operation can also be effective in heating non-ferromagnetic materials like aluminum and copper, making them suitable for heating these types of pans without complex induction coil and power converter designs. However, the use of these new generation power switches necessitates a re-examination of induction coil design. High switching frequency leads to a high resonance frequency in the power converter, which requires lower-value passive components compared to conventional cookers. The most important component is the induction coil, which requires fewer turns and magnetic cores. This study examines the induction heating equivalent circuit, discusses the general structure and design parameters of the induction coil, and performs FEM (finite element method) analyses using Ansys Maxwell. The results show that the induction coil inductance value in new-generation cookers decreases by 80% compared to traditional cookers, and the number of windings and magnetic cores decreases by 50%. These analyses, performed for high-power applications, are also performed for low-power applications. While the inductance value of the induction coil is 90 μH at low frequencies, it is reduced to the range of 5 μH to 20 μH at high frequencies. The number of windings is reduced by half or a quarter. The new-generation cooker system experimentally verifies the coil design based on the parameters derived from the analysis.
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Zhang, Li, Xinlei An, Jiangang Zhang, and Qianqian Shi. "Bifurcation Analysis and Synchronous Patterns between Field Coupled Neurons with Time Delay." Complexity 2022 (June 24, 2022): 1–19. http://dx.doi.org/10.1155/2022/7487477.
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Neurons encode and transmit signals through chemical synaptic or electrical synaptic connections in the actual nervous system. Exploring the biophysical properties of coupling channels is of great significance for further understanding the rhythm transitions of neural network electrical activity patterns and preventing neurological diseases. From the perspective of biophysics, the activation of magnetic field coupling is the result of the continuous release and propagation of intracellular and extracellular ions, which is very similar to the activation of chemical synaptic coupling through the continuous release of neurotransmitters. In this article, an induction coil is used to connect two HR neurons to stimulate the effect of magnetic field coupling. It is inevitable that time delays can affect the coupling process in the transmission of information, and it should be considered in the coupled model. Firstly, the firing characteristics and bifurcation modes of two coupled HR neurons are studied by using one parameter and two parameters bifurcation. With the increase of propagation delay and coupling gain, the chaotic state of neurons disappears and the high-period window decreases due to the influence of energy transfer between neurons. Then, the synchronization patterns of two HR neurons with different stimulation are analyzed by error diagrams and time series diagrams. It is confirmed that the synchronous pattern has certain regularity and is related not only to the neurons with large stimulation current but also to the time delay and coupling gain. The research conclusions of this article will provide the corresponding theoretical basis for medical experiments.
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Ryu, Seung-Ha, Chanh-Tin Truong, and Sung-Jin Choi. "Effective Scheme for Inductive Wireless Power Coil Design Using Scan-and-Zoom Optimization." Applied Sciences 13, no. 16 (2023): 9299. http://dx.doi.org/10.3390/app13169299.
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In inductive power transfer (IPT) systems, the coil design is crucial since the power transfer efficiency (PTE) of IPT depends on the coil characteristics such as geometric shape, diameter, wire thickness, etc. The most commonly used technique for the coil is finite element analysis (FEA). Nevertheless, if there are more than two parameters to be designed, FEA design requires a long simulation time since the coil design problem is separated into a series of single-parameter optimization problems. Another issue of conventional FEA is difficulty in interfacing with circuit simulation. To mitigate this issue, a novel co-simulation framework of MATLAB/ANSYS Maxwell is proposed in this paper. In MATLAB, multi-dimensional optimization algorithms like scan-and-zoom are employed to determine geometric parameters to achieve high PTE and minimize the number of FEA executions while Maxwell serves to extract the circuit parameters from the geometric parameters and enhance the accuracy of calculation. The 100 W prototype IPT system is built to verify the proposed coil design scheme in this paper. The performance comparisons with the conventional methods in terms of design accuracy, simulation time, and application flexibility are performed on a pair of designed single-layer circular coils.
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Dita Ayu, Banjarnahor, Rohmadi Rohmadi, Amir Rudin, Imamul Muttakin, and Warsito P. Taruno. "Design of a Sensor Coil for Electromagnetic Induction Tomography." MATEC Web of Conferences 218 (2018): 02001. http://dx.doi.org/10.1051/matecconf/201821802001.
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Electromagnetic tomography method works by utilizing magnetic field induced by coils that are given an electric current. An object with certain conductivity property interferes the magnetic field which will be sensed by the sensor in the form of voltage difference. Experiment using iron as an object has been conducted. In addition, parameters given are distance between transmitter and receiver coil, and frequency of transmitter signal. The result shows that conductive material gives significant voltage difference, which ranges between 0 – 0.072 V. The optimal transmitter-receiver coil distance is the shortest, while the optimal transmitter signal frequency is at 5MHz and 9MHz. Based on the optimum parameters gained, multi-channel magnetic induction tomography (MIT) sensor is designed. It contains four transmitter coils and four receiver coils. They are arranged in circle, which each transmitter and receiver pairs are in opposite location. The sensor proved to be able to sense voltage difference induced by an object. Samples of imaging are also successfully provided accordingly.
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Anpilogova, K. S., V. M. Puchnin, G. E. Trufanov, et al. "INVESTIGATION OF THE DIAGNOSTIC QUALITY OF BREAST MRI USING INNOVATIVE WIRELESS COILS." MEDICAL RADIOLOGY AND RADIATION SAFETY 67, no. 5 (2022): 69–74. http://dx.doi.org/10.33266/1024-6177-2022-67-5-69-74.
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Purpose Determination of the diagnostic capabilities of metadevices for breast MR examination in women. Material and methods In the study, two types of metadevices for examining the mammary glands were considered – for imaging in a field with magnetic induction of 3 T and 1.5 T. 11 healthy women of reproductive age were examined, magnetic resonance images of T1 (turbo spin echo) and T1 3D gradient echo (GRE) were obtained based on the Dixon method with fat saturation. The images were evaluated by radiologists on a 5-point Likert scale. Results The images obtained using the metadevices were characterized by acceptable and comparable absolute and relative signal-to-noise ratios comparing them to images obtained using a standard coil at the same spatial resolution and with a decrease in input power by an average of 27 times for 3.0 T. At the same time, for 1.5 T, the input power was reduced by a factor of 15.6, and the signal-to-noise ratio was increased by a factor of 2. For image quality criteria in terms of presence/absence of artifacts, the average score for the metadevice was higher than the score for the specialized coil by 3 T. For 1.5 T, this parameter turned out to be the same, which was probably associated with a lower level of artifacts by 1.5 T than by 3 T in general. Discussion Analysis of the collected assessments of independent experts indicates that the diagnostic characteristics of magnetic resonance images of the mammary glands obtained using ceramic-based (for 3 T) and wire-based (for 1.5 T) metadevices are of a good and average level, and are comparable in terms of all criteria with standard approaches. Conclusions The assessment of the quality of the obtained images demonstrates the acceptable quality of imaging and reflects the possibility of their application in clinical practice, taking into account ongoing improvements and optimization of the entire set of pulse sequences for MRI of the mammary glands.
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TSITSIKYAN, Georgiy N., and Petr V. BOBROVNIKOV. "Inductance and Compression Forces in Double-Layer Coils." Elektrichestvo, no. 3 (2022): 39–42. http://dx.doi.org/10.24160/0013-5380-2022-3-39-42.
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Expressions for calculating the self-induction coefficients of two-layer and single-layer coils are considered, and related comparisons are carried out. Examples of calculating the induction coefficients for known design versions of coils are given. An expression for calculating axial compression forces in two-layer coils is presented. The axial compression forces in coils as part of three-phase load devices designed for testing generator sets of autonomous power plants have been calculated. The expressions obtained for calculating the inductances and axial compression forces in two-layer coils are quite concise and can be recommended for practical use. These expressions include only the coil design parameters: the number of turns in the layers, layer radii, winding pitches, and layer lengths. The article is illustrated with particular examples of calculating the coil inductance and compression forces.
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Alhamrouni, Ibrahim, M. Iskandar, Mohamed Salem, Lilik J. Awalin, Awang Jusoh, and Tole Sutikno. "Application of inductive coupling for wireless power transfer." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (2020): 1109. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1109-1116.
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Considering the massive development that took place in the past two decades, wireless power transfer has yet to show the applicability to be used due to several factors. This work focuses on determining the main parameters like, mutual inductance, and coupling coefficient for a pair of helical coils for wireless power transfer applications. These parameters are important in designing and analyzing a wireless power transfer system based on the phenomenon of inductive/ resonant inductive coupling. Here presents a simple approach based on fundamental laws of physics for determining the coupled coil parameters for single layered helical coils. The results conducted by computer simulation which is MATLAB. Furthermore, this analysis is used to study the effect of change in coil diameter, mutual inductance coefficient and change in distance between coils on parameters like self and mutual inductance of coupled coils which is of great importance in Wireless Power Transfer applications. The research yielded promising results to show that wireless power transfer has huge possibility to solve many existing industrial problems.
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Ibrahim, Alhamrouni, Iskandar M., Salem Mohamed, J. Awalin Lilik, Jusoh Awang, and Sutikno Tole. "Application of inductive coupling for wireless power transfer." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1109–16. https://doi.org/10.11591/ijpeds.v11.i3.pp1109-1116.
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Considering the massive development that took place in the past two decades, wireless power transfer has yet to show the applicability to be used due to several factors. This work focuses on determining the main parameters like, mutual inductance, and coupling coefficient for a pair of helical coils for wireless power transfer applications. These parameters are important in designing and analyzing a wireless power transfer system based on the phenomenon of inductive/ resonant inductive coupling. Here presents a simple approach based on fundamental laws of physics for determining the coupled coil parameters for single layered helical coils. The results conducted by computer simulation which is MATLAB. Furthermore, this analysis is used to study the effect of change in coil diameter, mutual inductance coefficient and change in distance between coils on parameters like self and mutual inductance of coupled coils which is of great importance in Wireless Power Transfer applications. The research yielded promising results to show that wireless power transfer has huge possibility to solve many existing industrial problems.
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Li, Rui, Yuanyuan Zhang, Xiaodong Chu, et al. "Design and Numerical Study of Induction-Heating Graphitization Furnace Based on Graphene Coils." Applied Sciences 14, no. 6 (2024): 2528. http://dx.doi.org/10.3390/app14062528.
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Induction-heating graphitization furnaces are widely used to produce high-purity graphite products due to their high heating rate, high-limit temperatures, safety, cleanliness, and precise control. However, the existing induction-heating systems based on copper coils have limited energy efficiency. This paper proposes a new induction-heating graphitization furnace based on graphene coils. Due to the excellent high-temperature resistance of the macroscopic graphene material, the coil can be placed closer to the graphite heater, which improves the electromagnetic efficiency; the coil itself does not need to pass cooling water, which reduces the heat loss of the furnace and ultimately results in a higher energy efficiency of the induction furnace. In this paper, a numerical model of the induction-heating process is established and verified, the temperature-field and electromagnetic-field distributions of the heating process are analyzed by using the model, and the energy balance calculations are performed for the original furnace and the new furnace. Through a comparison, it was found that the new furnace possesses an electromagnetic efficiency of 84.87% and a thermal efficiency of 20.82%, and it can reduce the energy consumption by 33.34%, compared with the original furnace. In addition, the influence of the coil parameters on the performance of the induction furnace is discussed. By changing the coil conductivity, the induction furnace can achieve an energy efficiency of 17.76%–18.11%. This study provides new ideas for the application of macroscopic graphene materials in high-temperature induction heating.
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JosephNg, Poh Soon, Taha A. Taha, Abadal-Salam T. Hussain, Hussein I. Zaynal, and Shouket A. Ahmed. "Enhancing Wireless Power Transmission Efficiency via Resonant Coupling into Coil and Wire Parameters." International Journal of Global Optimization and Its Application 2, no. 4 (2023): 221–28. http://dx.doi.org/10.56225/ijgoia.v2i4.263.
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The concept of wireless power transmission involves the transfer of electrical energy from a power source to an electrical load without wires. The technology has become widely used in various mobile, industrial, and medical fields. This innovation eliminates the need for wires and batteries, making it a convenient and safe option for all users. Inductive and resonant coupling are the most commonly used methods for wireless power transmission. This work delves into designing and developing wireless power transmission hardware. A wireless power system comprises a transmitter (primary coil) and a receiver (secondary coil). The primary coil produces a magnetic field by passing alternating current through it. The secondary coil is then positioned close to the primary coil. When the two devices make contact, the primary and secondary coils become magnetically linked, causing the power to transfer from transmitter to receiver. To optimize the wireless power transmission using a resonant coupling, the paper tests and analyzes how different wire diameters, coil diameters, and the number of coils affect the output power.
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Jia, Zhi Wei, He Ran Ren, and Guo Zheng Yan. "Wireless Power Transmission System of Radio-Telemetry System for Physiological Parameters Detection." Advanced Materials Research 989-994 (July 2014): 1068–72. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1068.
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To deal with the power shortage of the implantable radio-telemetry system for animal physiological parameters dictation, a wireless power transmission system based on electromagnetic induction is proposed. The parameters of the couple coils are optimized considering the safety and stability of this power transmission, transmitting coil of rectangle section solenoid and three-dimensional receiving coil are selected. Experiments show that at least 150mW power could pick up on the load in a volume of Φ10.5 mm×11 mm with a transmission efficiency of 2.56%. Vivisection experiments verified the feasibility of the integrated radio-telemetry system based on this power supply technology.
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Krestovnikov, Konstantin, Ekaterina Cherskikh, and Аleksandr Bykov. "Approach to Choose of Optimal Number of Turns in Planar Spiral Coils for Systems of Wireless Power Transmission." Elektronika ir Elektrotechnika 26, no. 6 (2020): 17–24. http://dx.doi.org/10.5755/j01.eie.26.6.26181.
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Correct choice of coil parameters for resonant circuits in inductive power transmission systems is a relevant problem, as it significantly influences the efficiency and transmitted power in the systems and provides for optimization of these parameters. This paper presents a methodology of calculation of geometrical and electrical parameters and approach to choose the optimal number of turns in planar coils used in the wireless power transmission (WPT) system with parallel resonant circuit. Formulas are derived for calculation of active resistance and inductance of the coil, normalized to the specified design parameters of the coil. Connection is made between the design and electrical parameters of the coil, which allows choosing the optimal number of turns according to different criteria and guard conditions. The examples of practical use of the chosen approach with transmitting and receiving coils of WPT system are presented. The obtained results show that efficiency and transmitted power in the system are higher when using the coils with the calculated number of turns. The proposed approach may be used in selection of optimal design of loop coils in systems with fixed frequency, and in systems, whose operational frequency depends on the parameters of the resonant circuit.
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Šmelko, Miroslav, Dušan Praslička, and Josef Blažek. "Advanced Magnetic Materials for Aeronautics." Fatigue of Aircraft Structures 2013, no. 5 (2014): 60–65. http://dx.doi.org/10.2478/fas-2013-0006.
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Abstract In the field of magnetic sensors, magnetic microwires with positive magnetostriction are the materials of the future. Their mechanical and magnetic properties render them ideal materials for applications in aeronautics. A single microwire with a 40 jj.m diameter and a length of 10 mm is capable of capturing information about tensile stresses, magnetic fields, temperature and distance. This information is carried by a parameter called the Switching Field, HSW, which is specific for different types of microwire. Numerous physical qualities affect the HSW and through sensing of HSW, these qualities may be quantified. (A number of physical qualities affecting HSW can be sensed and quantified by means of a contactless induction method.) What distinguishes the system developed by the present authors from other measuring systems based on magnetic microwires is the positioning of a microwire outside the coil system. Thanks to this improvement it is possible to use microwires embedded directly in the construction material. Small dimensions microwires do not damage the structure of the construction material. The absence of a galvanic connection makes this technology even more interesting compared with traditional forge gauges. Offering the possibility of the simultaneous measuring of four parameters, this technology can be used in a wide range of aviation applications. Measurements of an external magnetic field can be usedfor the navigation and stabilization of an aerial vehicle. Tensile stress and distance measuring can be helpful to understand some processes occurring under the surface of the construction material and also to perform fatigue monitoring or structure load monitoring. Another big advantage of magnetic microwires is the low price. Just 1 gram of base material is sufficient to prepare about 40 km of microwire. All these features combine to offer us a material ideal for Smart Sensors, possibly available for use in the near future.
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Krishnamurthy Venkataramani, Raghavendiran, Krithikaa Mohanarangam, Jongmin Lim, Ke Yu, Venkateswarlu Gonuguntla, and Jun Rim Choi. "Design and Analysis of an Inductive Coupling System for the Early Detection of Heart Failure." Applied Sciences 13, no. 7 (2023): 4381. http://dx.doi.org/10.3390/app13074381.
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Heart failure is a common, complex clinical syndrome with high morbidity and mortality. Hemodynamic parameter evaluation is useful for early detection, clinical outcome monitoring, timely treatment, and the overall prognosis of heart failure patients. Therefore, continuous monitoring of hemodynamic parameters helps in the evaluation of patients with suspected heart failure. The hemodynamic parameters change with respect to the contraction and expansion of the heart. Hence, in this research, two circuit-less 30 mm spherical receiver coils were implanted in both the left and right sides of the heart and an external transceiver coil was placed above the chest. The changes in the reflection coefficient of the transceiver coil at the resonant frequency changed depending on the distance between the implanted coils, allowing the contraction and expansion of the heart to be determined. This work was carried out at 13.56 MHz, considering the safety limits imposed by the FCC. The proposed reflection coefficient monitoring technique may distinguish healthy patients from heart failure and heart attack patients. The reflection coefficients at a maximum distance of 50 mm for simulation and measurement are −10.3 dB and −10.6 dB, respectively, at the resonant frequency.
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Yehor, Zheliazkov. "RESEARCHING THE EFFICIENCY OF BUCK CONVERTER SYNCHRONOUS RECTIFIER." TECHNOLOGY AUDIT AND PRODUCTION RESERVES 4, no. 1 (54) (2020): 44–54. https://doi.org/10.15587/2706-5448.2020.207893.
Full textAbstract:
The object of study is synchronous buck-voltage converter with digital control system. One of the most prob-lematic things is energy changing and transmission in converters to reach certain numerical range with minimal losses in the components of the electrical circuit. An enormous calculated parameters of electrical scheme. There was advised and described both structure and electrical scheme of synchronous converter, which, thanks to digi-tal system, provides dates with more accuracy connected with an impact on working scheme. There was shown detailed analysis example with a numerical value for the certain elements of electrical scheme. It’s a fundament in order to choose certain parts of electrical scheme according to the certain categories. During research there was used selection of hardware and software tools: elements for buck-converter – key, diode and capacitor; certain voltage and frequency range for microcontroller; control of the power keys of the circuit with the corresponding operating parameters for driver. There was analyzed and calculated all over the possible losses during the process bucking of the voltage to the certain level, an enormous losses in the components of the converter electrical scheme – induction coil, keys and capacitors. It’s an important part of synchronous buck-converter. There was calculated power losses and efficiency through the received graphics of keys com-mutation in electrical scheme. There were received graphic dependence of converter efficiency on output power; time characteristics of the control signal pulse-width modulation (PWM) and output voltage; dependence on the commutation losses. This is because advised synchronous converter has a set of features. Particularly analog to digital converter in the capacity of feedback, digital regulation system with a discrete step and rectification by replacing diodes with actively controlled switches. There are keys of low-side and high-side levels accord-ing to the passing voltage and current values. Therewith provides possibility for receiving more accuracy value. In comparison with analogic buck-converters, this converter has voltage parameter with fractional error.
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Xiong, Xian Feng, De Ren Kong, and Xiao Feng Ruan. "Mechanism Analysis of Induction-Type Coil Target for Velocity Measurement." Advanced Materials Research 301-303 (July 2011): 666–70. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.666.
Full textAbstract:
Induction-type coil target is a common used zone-block device for measuring projectile’s velocity. The magnetized projectile is simplified as the point magnetic dipole, and then the physical model of magnetized projectile passing through the coil target is established, based on these the mathematic model of inductive electromotive force when the magnetized projectile flying through the coil target in a certain speed is deduced with the electromagnetic theory; According to the model, the characteristic parameters such as the zero-crossing point, the slope of zero-crossing point and the extreme value point are discussed, finally the principle and the influence factors of velocity measurement by single-coil target and paired- coil targets are described. All these above provide some foundation and advices for designing and using induction-type coil target.
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Huang, Wencong, Jinying Huang, Ying Hu, Yuqiao Zhu, and Yufang Chang. "Design and Parameter Optimization of Double-Mosquito Combination Coils for Enhanced Anti-Misalignment Capability in Inductive Wireless Power Transfer Systems." Electronics 13, no. 5 (2024): 838. http://dx.doi.org/10.3390/electronics13050838.
Full textAbstract:
This paper proposes a novel double-mosquito combination (DMC) coil for inductive wireless power transfer (IPT) systems to improve their anti-misalignment capability. The DMC coil consists of a mosquito coil with single-turn spacing and a tightly wound close-wound coil. By superimposing the magnetic fields generated by both coils, a relatively uniform magnetic field distribution is achieved on the receiving coil plane. This approach addresses the challenges of significant output voltage fluctuations and reduced transmission efficiencies caused by coupling coil misalignments in conventional IPT systems. To further optimize the DMC coil, an interaction law between its parameters and the mutual inductance is established, setting the coil mutual inductance fluctuation rate as the optimization objective, and using the coil turn spacing, number of turns, and outer diameter as constraint conditions. The beetle antennae search algorithm (BAS) is employed to enhance the whale optimization algorithm (WOA), facilitating the adaptive optimization of the coil parameters. An experimental IPT system platform with a 50 mm transmission distance is developed to validate the robust anti-misalignment capability of the proposed coil. The results demonstrate that within a horizontal misalignment range of 50 mm, the system’s output voltage fluctuation rate stays below 7.4%, and the transmission efficiency remains above 83%.
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Aganti, Mahesh, and Bharatiraja C. "New Magnetic Coupling Pad with Circular Geometry for Wireless Power Transfer Applications." ECS Transactions 107, no. 1 (2022): 15965–72. http://dx.doi.org/10.1149/10701.15965ecst.
Full textAbstract:
In Resonant Inductive wireless power transfer systems (RIPT), the magnetic coupler plays a fundamental role. That assists in passing of power without wires. In wireless power transfer systems (WPT), couplers are designed to achieve various parameters such as power transfer efficiency, high power density, transferrable distance, and tolerant towards misalignment. In addition, minimizing leakage flux, low weight, less cost, and space occupied. To achieve these parameters, researchers proposed different types of coils with different shapes. Those circular coils are more popular due to their unique features. Compared to other coils, these coils lack in power transfer distance. In this paper, a distinct magnetic coupler with circular geometry proposed to preserve some extent of its features. In proposed, a circular quadrature coil added with two circular coils shaped to the circular coil. Proposed topology analyzed using ANSYS Maxwell Finite Element Analysis 3D simulation and compared with different combinations chosen better performing combination.
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Weng, Guangyuan, Liu Yang, and Zhu Xiyu. "Stress Testing of Steel Suspender of Arch Bridge Model Based on Induced Magnetic Flux Method." Advances in Materials Science and Engineering 2020 (February 14, 2020): 1–8. http://dx.doi.org/10.1155/2020/7470156.
Full textAbstract:
To establish an online nondestructive stress testing method for arch bridge suspender based on the principle of magnetic coupling, the magnetic mechanical property of Q345qD steel is explored taking an arch bridge model structure with Q345qD steel suspender as the research object. Under the action of magnetic field excited by a coil, the test of the coupling relationship between stress and excitation flux is carried out. The theoretical model of stress-magnetic flux is simplified to better meet the requirements of engineering applications. The excitation device, magnetic flux measurement device, stress-magnetic flux data analysis program, and so on are developed, and the magnetic coupling stress detection system is integrated. The test model structure of a steel arch bridge with suspenders of Q345qD alloy steel is designed and made; under the different load conditions, the stresses of the suspenders are tested and studied. The relationships between induced magnetic flux and technical magnetized voltage, test load of model structure, and different stress conditions of the suspenders are analyzed; with the induction magnetic flux as the parameter, the stress-magnetic flux coupling model is established. The test results based on the stress-magnetic flux coupling model are compared with those of the traditional stress-strain test in a linear elastic range; it shows that the two testing methods are in good agreement with each other, and the maximum error is less than 5%. Meanwhile, with the increase in the load on the suspender, the tension stress increases and the induced magnetic flux decreases, showing a good linear relationship. The conclusions drawn from the research can provide important reference for health monitoring of suspenders of arch bridges.
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Pavlushin, Aleksey V. "Optimization design and operating parameters of induction heat-ing system for hardening." Vestnik of Samara State Technical University. Technical Sciences Series 29, no. 3 (2021): 38–51. http://dx.doi.org/10.14498/tech.2021.3.2.
Full textAbstract:
The paper deals with the problem of optimizing the design and operating parameters of an induction heating system for surface hardening of a steel stepped shaft. The problem of optimal design of an inductor is formulated based on a nonlinear two-dimensional numerical model of coupled electromagnetic and temperature fields, developed in the ANSYS Mechanical APDL software. Alternance method of parametric optimization of systems with distributed parameters is used to optimize induction hardening system. MATLAB software has been used for developing parametric optimization subroutine, which was incorporated into the numerical ANSYS model to simulate a process of induction heating. Commonly used a multi-turn solenoid-style coil fabricated from rectangular copper tubing has been used as a hardening inductor. Besides that, an application of profiled copper turns has been investigated. Optimization of induction hardening system described above allows one to substantially improve heating uniformity and enhance metallurgical characteristics of as-hardened stepped shaft. Localized temperature surplus at an upper diameter shoulder has been minimized. At the same time, sufficient austenitization in the fillet area near stepped region (diameter transition) has been obtained.
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Milić, Saša. "Induction coils for measuring low frequency and low intensity magnetic fields." Zbornik radova Elektrotehnicki institut Nikola Tesla 30, no. 30 (2020): 51–67. http://dx.doi.org/10.5937/zeint30-28255.
Full textAbstract:
Short air core induction coils with a large radius and a large number of turns can be successfully used as induction sensors for detecting low-intensity quasistationary magnetic fields, such as magnetic fields of ships. The application of these sensors is presented in detail, and then a practical methodology for determining all the necessary parameters of the sensor is proposed. The sensitivity of sensors with actual design parameters is determined and inductance is calculated in several ways. The practical results of ship's magnetism measurement and the calculation of all parameters of the coil are presented. A comparative analysis of all results was performed and the observed deviations were thoroughly commented on.