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Journal articles on the topic 'Electric circuit analysis'
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1
Karpa, Mykhailo, and Vitalii Betsyl. "AUTOMATING COMPUTATIONS FOR ELECTRIC CIRCUIT ANALYSIS WITH LABVIEW." Measuring Equipment and Metrology 85, no. 2 (2024): 33–39. http://dx.doi.org/10.23939/istcmtm2024.02.033.
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The article considers the application of the theory of the complex variable function employing the LabVIEW graphical programming environment for automating the calculation of electric circuits. The software products have been created to implement the method of constructing the matrix of the system of linear algebraic equations by inspection for both the mesh current method and nodal potential method in electric circuits of direct and alternating current and voltage using a graphical programming environment, except for circuits with dependent sources. All developed programs can be converted into .exe files, with subsequent utilization on computers that do not have a program environment installed. These software solutions can help lecturers quickly generate solutions for new assignments, saving valuable time. Students can utilize these software products for self-control, further reducing their workload.
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Rahimi, Mohammad, Behrad Soleymani, Farrokh Aminifar, and Amin Gholami. "A New Methodology for Circuit Analysis with Reverse Analysis Capability." Journal of Circuits, Systems and Computers 26, no. 06 (March 5, 2017): 1750101. http://dx.doi.org/10.1142/s0218126617501018.
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This paper presents a novel technique for the analysis of looped linear time-invariant electric circuits. This approach works in both time and Laplace domains; any type of elements could hence be incorporated. The circuit elements are partitioned into twofold classes of basic circuit and subsidiaries. The basic circuit is a spanning tree of the network, and the subsidiaries include circuit elements hypothetically removed from the looped electric circuit to open the loops. The subsidiaries include a suit of passive elements which might not even make any interconnected circuit. The circuit governing equations of flow and energy conservation are manipulated so that branch currents in the subsidiaries and branch voltages in the basic circuit are considered as independent variables to calculate passive element properties (impedance of all passive elements) directly. In contrast to existing methods, this technique is tailored for the circuit analysis in a reverse manner. As a complement for conventional circuit analysis techniques, this method can be taught in the undergraduate program to offer the students an alternative tool for the circuit analysis.
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Mihaylenko, V., J. Chunyak, and V. Bachinskiy. "Analysis of processes in converter with eleven zone regulation output voltage." POWER ENGINEERING: economics, technique, ecology, no. 3 (April 6, 2020): 35–40. http://dx.doi.org/10.20535/1813-5420.3.2020.228610.
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Analysis of the electromagnetic processes is organized beside this article in electric circuit with semiconductor commutator . Mathematical model is created for analysis electro-magnetic processes in semiconductor converter with width pulsed regulation of the output voltage. The broughted graphs, which reflect the electromagnetic processes in electric circuit. Method much parametric functions was used when performing calculation. The mathematical model of the converter is created for eleven zoned regulations of the output voltage. Article is devoted to the development of a method of multi-parametric modulating functions by means of working out of new mathematical models and definition of functions and the algorithmic equations for the analysis on sub- system components of electromagnetic processes in electric circuits of variable structure with sinusoidal, direct and pulsing voltage. Introduction of functions with discrete parameters in the algorithmic equations for analysis of processes in circuits with semiconductor commutators simplifies modeling on subsystem components. The mathematical model of steady-state processes and transients in electric circuits of semiconductor converters of modulation type with multi-channel zonal use of phase and line voltages of a three-phase network of power supplies is developed. The mathematical model of electric circuits of thyristor shapers of electro-discharge pulses for the analysis and the matching of capacitors charging modes with decrease several times of electric resistance of technological load is also created. The obtained results have a great value for development theoretical electrical engineering in a direction of simplification of calculations of electromagnetic processes in electric circuits with semi-conductor converters of the electric power. The Electromagnetic processes in electric circuit under width- pulse regulation possible to analyse with use the algorithmic equations multivariable function, which argument are a system parameters semiconductor commutator, signal of control, phases to network of the power supply and time. Introduction multivariable function with discrete parameter in algorithmic equations of the analysis formed and connecting processes in electric circuit of the variable structure allows to reflect change of this structure under system components, simplifying modeling and analysis of such processes to account of the generalization of the got equations. Except specified correlations and diagrams designed model allows to analyse forms of the output voltages and current of the separate power modules.
4
Batygin, Yuriy, Tetyana Gavrilova, Svitlana Shinderuk, and Evgeniy Chaplygin. "THE RESONANT AMPLIFIER OF THE ACTIVE ELECTRICAL POWER WITH ADDITIONAL VOLTAGE SOURCE. SUGGESTIONS, ANALYSIS, NUMERICAL ESTIMATES." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 3(17) (October 5, 2023): 3–10. http://dx.doi.org/10.20998/2413-4295.2023.03.01.
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The problem of increasing energy saving in industry leads to the need to develop new technical devices. The paper presents and analyzes the circuit of the resonance amplifier of active electric power, evaluates the characteristics of electromagnetic processes for the fundamental substantiation of the operation of real devices based on this circuit. Mathematical analysis of electromagnetic processes taking place was carried out using strict methods of the theory of electric circuits. The advantages of this scheme in comparison with similar previous proposals are shown. The device includes four active-reactive circuits that are inductively connected. The first of them is an input circuit with a harmonic signal source that needs to be amplified. The second circuit generates enhanced reactive power in the "voltage resonance" mode. The third circuit with an additional voltage source provides reactive power output from the second circuit in the "resonance of currents" mode without adverse effects on amplification processes. The fourth circuit, inductively connected to the third circuit, contains an output load - a resistor that simulates the allocation of active power. On the basis of the analysis and numerical evaluation of the characteristics of the processes taking place in the proposed scheme of the resonance amplifier of active electric power, its basic efficiency is shown. The calculations of the experimental model made it possible to formulate recommendations for the selection of circuit elements of a working resonant amplifier with a high efficiency for low-impedance output loads. The considered real parameters of the device make it possible to minimize the dissipation of the energy of converted electrical signals and to increase the amplification factor of the electric power of harmonic currents and voltage by choosing the element base. The obtained results can be considered as practical recommendations for the creation of real devices for amplifying active electric power for use in various industries.
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Zhang, Wei. "Quantitative Analysis for Near-Field Characteristics of Converter Circuits." Applied Mechanics and Materials 48-49 (February 2011): 858–62. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.858.
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With the electric power industrial development, electric power device was abroad using as the core of switch converter. For a clear near-field characterization quantitative electromagnetic interference of converter circuits, this paper applied finite element method to analyze a Boost circuit. Transform topology structure of circuit and build corresponding entity finite element modeling. Quantitative analysis for different topology structure electromagnetic distributing and near-field characteristics, and it become clear that the distribution and the role of electromagnetic field of the circuit through the results. The objective of the analysis is to provide the principle and put a new way for the Layout and component design of the power electronic circuits, at the same time above research works make a foundation for further studying EMI problem of the power electronic devices and are of academically and application worthiness.
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Chatzarakis, George E., P. G. Cottis, Marina D. Tortoreli, P. B. Malatestas, N. J. Kolliopoulos, and Spiros N. Livieratos. "Powerful Pedagogical Approaches for Finding Thevenin and Norton Equivalent Circuits for Linear Electric Circuits." International Journal of Electrical Engineering & Education 42, no. 4 (October 2005): 350–68. http://dx.doi.org/10.7227/ijeee.42.4.6.
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This paper presents two powerful pedagogical approaches for finding Thevenin and Norton equivalent circuits for d.c. linear electric circuits. These approaches are based solely on mesh analysis (for planar circuits) and on nodal analysis (for planar or nonplanar circuits) and simultaneously provide all equivalent circuit parameters from one circuit.
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Turner, Matthew. "Evaluation of an Early Three Phase Approach to Electric Circuit Instruction." International Journal of Engineering Pedagogy (iJEP) 7, no. 1 (February 28, 2017): 69. http://dx.doi.org/10.3991/ijep.v7i1.6418.
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This paper presents a novel approach to the study of electric circuits: utilizing three phase electric power systems to introduce students to the techniques of circuit analysis beyond Kirchhoff’s and Ohm’s Laws. The efficacy of the pedagogy is evaluated by comparison of student performance on DC circuits assessment quiz pre and post intervention and by comparison to circuit analysis methods used by experts. Also discusses is how the curriculum effects students qualitative and quantitative conceptions of the behavior of voltage and current in DC resistive circuits.
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Jamaaluddin, Jamaaluddin, Izza Anshory, and Shazana Dhiya Ayuni. "Analysis of Overcurrent Safety in Miniature Circuit Breaker with Alternating Current." Journal of Electrical Technology UMY 5, no. 2 (December 18, 2021): 68–73. http://dx.doi.org/10.18196/jet.v5i2.12508.
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In the utilization of solar energy, the equipment used includes Photovoltaic Cells, solar charging controls, batteries, protection devices, and other measuring devices. This solar power generation system is the name of a system that can convert solar energy into electric power. This solar power plant used in buildings is referred to as the Solar Building System (SBS). To perfect this solar power generation system, it is necessary to manage the electric power protection system. The protection system in this solar power plant includes the use of Miniature Circuit Breakers (MCB). This Miniature Circuit Breaker is a tool for overcurrent protection in alternating current systems and direct current systems. In order to obtain a good protection system for this solar power plant, a study was conducted on the use of a miniature circuit breaker that is effective for a certain type of current. The research method used is the use of alternating current and direct current miniature circuit breakers in alternating current circuits. Observations and recordings were carried out, so that the obtained results were quite significantly different in their use. From the results of the study, it was found that the Miniature alternating current circuit breaker has better characteristics in alternating current circuits, when compared to direct current miniature circuit breakers.
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Mykhailenko, Vladyslav, Vadym Svyatnenko, Yuliya Chunyak, and Vladyslav Bachynskiy. "Research of processes in a converter with four-zone voltage regulation and electromechanical load." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (5) (May 28, 2021): 39–41. http://dx.doi.org/10.20998/2079-3944.2021.1.07.
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The new mathematical models of the electromagnetic processes is designed in three-phase electric circuit of the semiconductor converters with many-server zoned regulation phases voltages disregarding losses in semiconductor commutator for quick estimation of the influence parameter loads on level and form of the output voltage. mathematical model of the semiconductor converter is also used for study of the connecting processes in semiconductor converter with actively-inductive load. Will develop the method multivariable function, what fall into algorithmic equations of the analysis formed and connecting processes in furcated electric circuit with semiconductor commutator and reactive element, toward account of the particularities of the use phase and linear voltages to network of the power supply. Analysis of the electromagnetic processes is organized beside this article in electric circuit with semiconductor commutator. Mathematical model is created for analysis electro-magnetic processes in semiconductor converter with width pulsed regulation of the output voltage. The broughted graphs, which reflect the electromagnetic processes in electric circuit. Method much parametric functions was used when performing calculation. The mathematical model of the converter is created for eleven zoned regulations of the output voltage. Article is devoted to the development of a method of multi-parametric modulating functions by means of working out of new mathematical models and definition of functions and the algorithmic equations for the analysis on sub-system components of electromagnetic processes in electric circuits of variable structure with sinusoidal, direct and pulsing voltage. Introduction of functions with discrete parameters in the algorithmic equations for analysis of processes in circuits with semiconductor commutators simplifies modeling on subsystem components. The mathematical model of steady-state processes and transients in electric circuits of semiconductor converters of modulation type with multi-channel zonal use of phase and line voltages of a three-phase network of power supplies is developed. The mathematical model of electric circuits of thyristor shapers of electro-discharge pulses for the analysis and the matching of capacitors charging modes with decrease several times of electric resistance of technological load is also created.
10
Priambodo, Purnomo Sidi, Yosua Adriadi, and Taufiq Alif Kurniawan. "Transformerless SoC-based current control switching battery charger for e-vehicle: design and analysis." E3S Web of Conferences 67 (2018): 03044. http://dx.doi.org/10.1051/e3sconf/20186703044.
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Electric-based vehicles become a necessity in the future to dramatically reduce the effects of pollution. There are various devices involve in the operation of electric vehicles, one of which is a battery charger. This paper discusses the design steps, circuit and ripple performance analysis associated with building a battery charger system. The analysis shows the differences between RL and RC circuits in controlling the output voltage average and the ripples. It shows how RLC mixed circuit improve performance in both controlling the output voltage average and the ripple suppression.
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Batygin, Yuriy, Svitlana Shinderuk, Evgen Chaplygin, Tetyana Gavrilova, and Denis Fendrykov. "RESONANT AMPLIFIER OF ACTIVE ELECTRICAL POWER.SUGGESTION, ANALYSIS, NUMERICAL ASSESSMENTS." Technical Sciences and Technologies, no. 3(29) (2022): 160–68. http://dx.doi.org/10.25140/2411-5363-2022-3(29)-160-168.
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The purpose of this work is to substantiate the real effectiveness of the proposed active electric power resonant amplifier circuit, represented by a sequence of four inductively coupled active-reactive circuits. The first of them is the input with a source of a harmonic signal to be amplified. The second one generates amplified reactive power in the voltage resonance mode. The third one carries out theoutput of power from the second circuit without the reverse influence of the amplification processes with an additional third-party voltage source in the current resonance mode. The fourth circuit inductively connected to the third circuit contains an output load -a resistor that simulates the release of amplified active power. The analysis and numerical assessments of the characteristics of the processes in the proposed scheme of the resonant amplifier of active electric powermade it possible to substantiate its fundamental capability. Quantitative estimates for the experimental model made it possible to give recommendations on the choice of the parameters of the circuit elements of the resonant amplifier, which has sufficiently high efficiency indicators for low-resistance output active loads.The results obtained are based on the conclusions of a generalized theoretical analysis of electromagnetic processes and numerical estimates for its experimental implementation.The proposed scheme for the resonantamplification of active electric power, the rationale for its fundamental effectiveness, the theory and numerical assessments of the characteristics of the ongoing processes are of practical interest for further experimental studies, as well as for formulating recommendations for the manufacture of operating samples of this proposal are very promising directions. The results of the conducted research are seen as a theoretical search for the conditions for the highest efficiency and an experimental study ofelectromagnetic processes in the proposed circuit of a resonant amplifier of active electric power.
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Reljin, Branimir, Slavica Ristić, and Milesa Srećković. "Analysis of Some Physical Phenomena and Processes by Equivalent Electrical Circuits." International Journal of Electrical Engineering & Education 33, no. 4 (October 1996): 353–72. http://dx.doi.org/10.1177/002072099603300407.
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Analysis of some physical phenomena and processes by equivalent electrical circuits Electric circuit analysis is a very powerful tool solving many complex problems. Consequently, most non-electrical problems can be efficiently resolved if they are modelled, first, by appropriate electric circuits. In this paper some physical phenomena (in thermodynamics, optics and dynamics of fluids) are chosen to illustrate the above statement. The modelling procedure exposed can also be extended to other problems in science.
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Мihaylenko, V., J. Chunyak, K. Trubitsin, and V. Bachynskiy. "MATHEMATICAL MODEL OF A TWELVE-PULSE CONVERTER WITH SIXTEEN ZONE CONTROL OF THE OUTPUT VOLTAGE AND ACTIVE-INDUCTIVE LOADS." Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 2, no. 37 (April 23, 2021): 68–72. http://dx.doi.org/10.31319/2519-2884.37.2020.13.
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Analysis of the electromagnetic processes is organized in this article in electric circuit with semiconductor commutator. Mathematical model twelve pulses of the converter is created for analysis of the electromagnetic processes in semiconductor converter with width-pulse regulation of the output voltage. The broughted graphs, which reflect the electromagnetic processes in electric circuit. Method multivariable function was used when performing calculation. The mathematical model of the converter is created for five zoned regulations of the output voltage. Using method multivariable function was found current and voltage of the load, as well as input currents of the converter. The load of the converter has actively inductive nature. Article is devoted to the development of a method of multi-parametric modulating functions by means of working out of new mathematical models and definition of functions and the algorithmic equations for the analysis on sub-system components of electromagnetic processes in electric circuits of variable structure with sinusoidal, direct and pulsing voltage. Introduction of functions with discrete parameters in the algorithmic equations for analysis of processes in circuits with semiconductor commutators simplifies modeling on subsystem components. The mathematical model of steady-state processes and transients in electric circuits of semiconductor converters of modulation type with multi-channel zonal use of phase and line voltages of a three-phase network of power supplies is developed. The mathematical model of electric circuits of thyristor shapers of electro-discharge pulses for the analysis and the matching of capacitors charging modes with decrease several times of electric resistance of technological load is also created. The obtained results have a great value for development theoretical electrical engineering in a direction of simplification of calculations of electromagnetic processes in electric circuits with semi-conductor converters of the electric power. The electromagnetic processes in electric circuit under width-pulse regulation possible to analyse with use the algorithmic equations multivariable function, which argument are a system parameters semiconductor commutator, signal of control, phases to network of the power supply and time. Introduction multivariable function with discrete parameter in algorithmic equations of the analysis formed and connecting processes in electric circuit of the variable structure allows to reflect change of this structure under system components, simplifying modeling and analysis of such processes to account of the generalization of the got equations. Except specified correlations and diagrams designed model allows to analyse forms of the output voltages and current of the separate power modules.
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Liu, Ying Chun, Jian Ming Zhang, De Long Zhang, Yan Yu Wang, Chun Guang Hou, Zi Ping Wang, Hua Xin Liu, and Chun Rui Liu. "30A/60V Electric Car Charger Control Circuit Simulation." Advanced Materials Research 971-973 (June 2014): 950–53. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.950.
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Through analysis and comparison of existing charging method works , adding more links constant current charging and constant voltage charging on the basis of the three-stage charging mode is proposed to receive more in line with rechargeable batteries five-phase characteristic curve charging mode. By scaling the control circuit and the PI regulator circuits use the charging current value and the constant voltage is sampled , a constant voltage corresponding to the error value to be compared and outputs the PWM control chip SG3525, causing the output current of the front end circuit chip , the regulation voltage , the error is gradually reduced until it reaches the steady-state output . 1 key components - integrated operational amplifier selection Integrated operational amplifier control circuit for the main components , essentially the entire op-amp circuits are designed to carry around , so choose the op amp circuit is particularly important . From the foregoing analysis, the current control and voltage control portion of each part requires three op amp ( both as an amplifier , a PI controller is used ) , the entire control circuit requires access to six integrated amplifier . Out of circuit integration considerations, decided to use a quad op amp manifold and a dual op amp with the completion of the manifold . By screening and the corresponding parameters available on the TI (TEXAS INSTRUMENTS TI ) website , and ultimately determine the use of quad op amp LF347 and dual op amp TLC2272.
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Boldyrev, Alexander. "Energy-efficient inverter circuit for the low-voltage asynchronous driver controller with autonomous power supply." E3S Web of Conferences 279 (2021): 01004. http://dx.doi.org/10.1051/e3sconf/202127901004.
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The design of the energy-efficient inverter circuit for the asynchronous frequency-controlled three-phase electric driver with autonomous low-voltage DC power supply. The components analysis of the electric drive, the main components selection approach: microcontroller, three-phase driver and power transistors. R&D prototype of the energy-efficient inverter circuit was created, characterized by an average consumption current reduced by 5%. Reducing energy losses is achieved by reducing dynamic losses in the power circuits of a low-voltage inverter and using several circuit solutions.
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Horyachko, Vsevolod, Orest Hamola, and Taras Ryzhyi. "Analysis of magnetic fields of electrical devices based on their circuit models." Computational Problems of Electrical Engineering 11, no. 1 (April 25, 2021): 7–11. http://dx.doi.org/10.23939/jcpee2021.01.007.
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he article deals with an analysis of magnetic fields of electric machines and electromagnetic devices on the basis of their circuit mathematical models. The magnetic systems of electrical devices in these models are presented in the form of planar nonlinear magnetic circuits with lumped elements. The parameters of these elements are determined on the basis of geometric dimensions taking into account the design features of the devices and the physical parameters of the environment.
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Choi, Minseok. "Root Cause Analysis of Electric Fires and Risk Diagnosis of Parked Vehicles." Journal of the Korean Society of Hazard Mitigation 20, no. 1 (February 29, 2020): 245–50. http://dx.doi.org/10.9798/kosham.2020.20.1.245.
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Generally, a vehicle's electrical circuits are protected against overcurrent. However, an overcurrent protector cannot completely prevent fires. In particular, fires that occur in parked vehicles are often caused by Joule heat and arc faults owing to contact failures, partial disconnection, arc tracking, and connection errors in the circuit that continues to receive electricity from the battery. Since the flowing current in such a case is not an overcurrent, the fuse will not react and may thereby cause a fire. Additionally, if a wire burns and causes a short circuit after the fire, the fuse will react to cut off the electricity supply, but cutting off the electricity supply after ignition has no significance. Furthermore, since an overcurrent protection device cannot determine whether Joule heat and arc faults are occurring in anelectrical circuit, a thermal imaging test is required in addition to visual inspection and should be conducted duringvehicle inspection.
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Nurhidayati, Indah, Aryanti Fitrianingsih, Sinta Marito Siagian, and Samaria Chrisna HS. "Analysis of I-V on Basic Electrical Circuit Using Ni Multisim App in Apply Physics." RSF Conference Series: Engineering and Technology 3, no. 1 (October 5, 2023): 114–20. http://dx.doi.org/10.31098/cset.v3i1.743.
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Utilization of the NI Multisim application is useful for designing a circuit, starting with designing schematic circuits and analyzing and simulating. Increasing the use of technology so that it is very much needed in physics learning at the Polytechnic of Maritime Sciences on electrical circuit material. This study aims to measure and characterize I-V currents in an electrical circuit by comparison with laboratories and multisim applications. Research activities were carried out using the I-V Current and Voltage comparison analysis method using theory in the manual formula, practice with the circuit kit, and NI Multisim simulation by building a circuit scheme on circuit composition namely resistance, voltage source, and using voltage measuring instruments and current measuring instruments which are all regulated in such a way concerning the theory of electric circuits. The results of this study are that there is a difference in the total resistance value between the values in the circuit kit module practice with the use of Multisim. But the difference is very slight with an error of about 1% for series circuits, and about 4.4% for parallel circuits. Voltage values in series circuits using NI Multisim circuit kits and applications have differences with errors ranging from 0 to 3.3 %. The comparison of the voltage values in direct measurements of the circuit kit and the NI Multisim simulation has the lowest error of 0% and the highest of 20% at the 6V source in R2.
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Arabasi, Sameer. "Educational approach to the wye–delta transformations using simple circuit analysis techniques." International Journal of Electrical Engineering & Education 55, no. 3 (April 10, 2018): 234–43. http://dx.doi.org/10.1177/0020720918767048.
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The wye-to-delta (Y–Δ) transformation is part of every circuit analysis course. In electric circuits textbooks, the transformation is found by comparing the two networks and making sure that the resistance between each pair of nodes in one network is the same as the resistance between the same pair of nodes in the other network. The two networks are compared as open-circuit networks. This creates confusion among students because usually the network is part of a larger closed-circuit network. In this paper, an alternative method is proposed. The new method starts from one configuration and finds the corresponding equivalent configuration by deriving currents and voltages, as part of a closed circuit. This method can be adopted in circuit analysis courses to help students develop a deeper understanding of this topic.
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Batygin, Yuriy, Svitlana Shinderuk, Evgen Chaplygin, Olena Yeryomina, and Egor Tereh. "Introduction of an additional source of harmonic signal into the circuit of the electric power resonant amplifier." Automobile transport, no. 51 (December 29, 2022): 66–73. http://dx.doi.org/10.30977/at.2219-8342.2022.51.0.07.
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Problem. The problems of the electric power industry, caused by the depletion of the natural resources of the planet and the need to replace them, initiate the development of new physical and technical solutions with the practical use of the known natural phenomena. Goal. The purpose of this work is to propose to introduce an additional source of a harmonic signal (voltage or current) into the circuit of a resonant amplifier of electric power, to obtain calculated analytical dependencies for numerical estimates of the characteristics of ongoing electromagnetic processes, which make it possible to give a fundamental justification for the real performance of the proposed circuit as a whole, taking into account the interaction of all its functional components. Methodology. This work, ultimately, involves the use of resonant phenomena in circuits with active-reactive elements and their theoretical analysis using the mathematical apparatus of the theory of electrical circuits. Results. It is proposed to implement the resonant amplifier circuit in the form of four active-reactive closed circuits inductively coupled to each other. Moreover, in a practical embodiment, inductive couplings can be carried out using HF ferrites. The first circuit is the input circuit with the harmonic power source to be amplified. The second circuit generates amplified reactive power in the "voltage resonance" mode. The third circuit with an additional harmonic voltage source outputs reactive power from the second circuit in the "current resonance" mode. The fourth circuit, inductively coupled to the third circuit, contains the output load of the entire resonant amplifier. This is a resistor that simulates the release of active power. Originality. Physically, the introduction of an additional source in the third circuit is equivalent to the creation of a "negative active resistance", which makes it possible to create conditions for excitation of current resonance with the minimum possible distortion and, ultimately, to reduce the reverse effect on the amplifying processes in the second circuit (reactive power amplifier). The analysis and numerical evaluation of the characteristics of the proposed scheme of the active electric power resonant amplifier showed its fundamental viability. Practical value. As an example, calculations of currents and voltages in the circuit of an experimental model were made, which enabled to formulate recommendations for the selection of elements of a real active electric power amplifier with high efficiency for low-resistance output loads.
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Wang, Zhuo, and Hai Bao. "Analysis of the Energy Metering Problem in Dynamic Environment." Applied Mechanics and Materials 668-669 (October 2014): 673–76. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.673.
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The traditional electric power metering theory is a kind of no-error metering theory in sinusoidal steady-state circuit. However, the applying condition is too rigor, and the engineering environment is hard to fulfil, the application premise should be extended to dynamic. Ideal linear elements are adopted to build a first-order dynamic circuit. And the analytic expressions of the capacitor cumulative electric energy in the charging process are derived theoretically. It points out that the cumulative electric energy of capacitor in dynamic circuit is a nonzero value. This fully demonstrates that the energy metering principle brings error when it is used in dynamic environment.
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Duan, Xiuzhen, Xiaopeng Li, and Yaning Liu. "Application of BP neural network in on-board charger fault diagnosis." Journal of Physics: Conference Series 2290, no. 1 (June 1, 2022): 012004. http://dx.doi.org/10.1088/1742-6596/2290/1/012004.
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Abstract With the accelerated growth of the number of electric vehicles, the frequent occurrence of electric vehicle charging safety accidents has brought some safety hazards to people. The fault diagnosis of on-board charger circuit has gradually become the focus of attention of scholars. This paper uses simulation software to conduct modeling simulation analysis, failure mode analysis and data acquisition for the on-board charger of electric vehicles, and establishes a fault diagnosis model based on BP neural network, which is applied to the fault diagnosis of on-board charger circuits. The optimal fault diagnosis model is obtained by continuously adjusting the number of neurons in the hidden layer of the BP neural network, and the open-circuit faults of diodes and MOSFETs are mainly analyzed experimentally. The simulation results show that the expected effect has been achieved in the fault diagnosis of the on-board charger circuit, and the established simple BP neural network model can be applied in practice. Some feasible solutions are provided for improving the charging safety of electric vehicles.
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Zenkovich, Y. I., and A. A. Ivanenko. "ANALYSIS OF ELECTROMAGNETIC COMPATIBILITY OF TRACK CIRCUITS AND TRACTION POWER SUPPLY." World of Transport and Transportation 15, no. 1 (February 28, 2017): 40–46. http://dx.doi.org/10.30932/1992-3252-2017-15-1-4.
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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT The issues of electromagnetic compatibility of traction power supply devices with track circuits are considered in case ice phenomena on the contact wire. The calculated ratios for determining the value of the bias currents of the choke-transformers in the electric arc, which arises from the formation of ice on the contact wire, as well as the reasons for false occupation of track circuits at the station are analyzed. Keywords: electromagnetic compatibility, track circuit, electric arc, asymmetry coefficient, traction current, contact wire, resistivity of rails.
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Januaris Pane, Asnida Nainggolan, Juliper Nainggolan, Bajongga Silaban, and Riossally Marselina Tumanggor. "Meningkatkan Minat dan Hasil Belajar Fisika Siswa melalui Bimbingan Belajar Menggunakan Alat Peraga Rangkaian Listrik." PaKMas: Jurnal Pengabdian Kepada Masyarakat 2, no. 1 (May 31, 2022): 70–77. http://dx.doi.org/10.54259/pakmas.v2i1.818.
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Learning that occurs in schools certainly has many obstacles and difficulties for students. As a result of online learning that was previously done, many students did not understand the learning material. Learning that occurs and takes place for students in science lessons, especially physics, has been a difficult lesson because of the many formulas and theories that tend to be memorized so that students feel less interested. In physics lessons, experiments are needed to improve students' understanding, so tutoring is carried out after school to overcome students' difficulties using teaching aids with the experimental method. Community service activities with tutoring are carried out at SMP Negeri 1 Tapian Nauli. Props used in electrical circuit material. With props that have been made can help students gain understanding and maximum learning outcomes in the tutoring carried out. The development of this electric circuit aid helps students to practice skills and understanding on series circuits and parallel circuits. The results of this tutoring activity increased student interest and learning outcomes, seen the average value of students before using the electric circuit teaching aid was 34.69 and after using the electric circuit teaching aid 86.57. Based on the N-Gain analysis, it is known that student learning outcomes are categorized as high and the results of the T test (Paired Sample Test) show a significant difference. The electric circuit teaching aids developed are very feasible, practical and effective to use in learning for students.
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P., Reba, Susithra N., Deepa M., and Santhanamari G. "Effective Teaching of Electric Circuit Analysis through Jigsaw Cooperative Learning Method." Journal of Engineering Education Transformations 36, no. 1 (July 1, 2022): 49–59. http://dx.doi.org/10.16920/jeet/2022/v36i1/22136.
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Abstract : In recent times, in addition to the conventional teaching methods, new pedagogical initiatives are indispensable to elongate the attention span of the present students from generation Z and generation alpha. Jigsaw is one of the Collaborative teaching practices which involves facilitators working in tandem with the students, instructing and mentoring them to solve problems. This paper presents the implementation of an enhanced Jigsaw learning method for teaching Circuit Analysis course for first-year students. Instead of randomly assigning students to groups, the proposed enhancement in the Jigsaw learning method presents diverse teams based on student personalities (Triguna levels – Sattva, Rajas, and Tamas). Such diverse groups become effective learning units and ensure team coherence. Minute feedback was obtained at the end of the session to analyze the effectiveness of the proposed enhanced jigsaw method. The feedback analysis indicates a paradigm shift in the students' level of understanding, and the assessment scores of Tamas students had a significant improvement of 20%. Also, the post-session data shows a boost in the confidence level of the students in solving different DirectCurrent (DC) and Alternating Current (AC) based electric circuits. A comparison between the conventional teaching method and the enhanced Jigsaw teaching-learning process is also presented. The results indicate that this method proves to be effective both from the students' learning and the faculty's teaching perspective. In addition to improving the desired learning outcome, the enhanced Jigsaw method also makes the learning process enjoyable. Keywords : Teaching-learning process, Jigsaw method, Triguna levels, Electric circuits, circuit analysis, active learning.
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Shishkin, I., and Sergii Lushchin. "Controlling electrical circuit of electric motor on igbt transistors." Electrical Engineering and Power Engineering, no. 1 (June 30, 2023): 30–35. http://dx.doi.org/10.15588/1607-6761-2023-1-3.
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Purpose. Development and analysis of the operation of an electrical circuit for controlling a 700 W direct current electric motor using a contactor on IGBT transistors for operation in diesel locomotives. Methodology. Analytical and computational methods for developing and analyzing the operation of an electrical circuit using a contactor on IGBT transistors. Findings. An electrical circuit for controlling a 700 W DC motor using IGBT transistors was developed. The circuit allows you to replace electromagnetic contactors with IGBT transistors to improve the technical characteristics and performance of the electric motor. The use of IGBT transistors allows you to avoid burning of contact groups in comparison with an electromagnetic contactor. A graphical analysis of the transient processes during switching on and off of the electric motor using a circuit based on IGBT transistors was carried out. The analysis of the load characteristic of the electric motor at start-up shows that in the initial section the voltage increases according to a linear law. After the initial increase in voltage, it reaches the set value and the electric motor operates in the operating mode. The analysis of the load characteristics of the electric motor when it is turned off shows, that when the power is turned off, the motor can’t stop immediately, as the phenomenon of self-induction occurs. When the external voltage is turned off, its change on the electric motor occurs according to the exponential law. It is shown that for controlling the operation of the electric motor, it is more appropriate to use an electric circuit based on IGBT transistors, which provides conditions for more stable and safe operation of the electric motor. Using the electrical circuit allows you to find quickly malfunctions for their further elimination. The electrical circuit allows you to avoid physical wear of its electrical elements. Originality. An electrical circuit for controlling an electric motor based on modern electronic components has been developed, which allows the use of IGBT transistors instead of electromagnetic contactors. On the basis of the analytical and calculation method and graphical analysis, the expediency of using IGBT transistors instead of electromagnetic contactors has been proven. Practical value. The developed electrical circuit can be applied to control a 700 W direct current electric motor for operation in diesel locomotives. The proposed electrical circuit allows to increase the mobility of repairs in the event of a malfunction by replacing the corresponding unit.
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Došlo, Glorija, and Kristina Rajković. "Symbolic analysis of linear electric circuits with MIT Julia Symbolics.jl package." Tehnika 79, no. 1 (2024): 75–85. http://dx.doi.org/10.5937/tehnika2401075d.
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This paper presents novel free open-source software JuliaCAP for symbolic analysis of linear time-invariant electric circuits in the complex domain of the Unilateral Laplace Transform or Phasor Transform. Modified Nodal Analysis (MNA) has been chosen for formulation of circuit equations in JuliaCAP. JuliaCAP has been developed by Kristina Rajković, Glorija Došlo, Nikola Radojević, Tamara Petković and Ivana Stanojević, at the University of Belgrade - School of Electrical Engineering, Belgrade, Serbia. JuliaCAP is written in Julia, a free open-source (MIT licensed) programming language. Whereas Julia is a relatively new language, there will be some words about it. As a free opensource software package, the underlining algorithm is revealed in full detail, so anybody can get a better understanding of the used methods. We offer JuliaCAP as a useful tool for solving linear time-invariant electric circuits. The future directives should be the improvement of simplifying expressions and the absence of the possibility to solve electric circuits in the complex domain of the Unilateral Laplace Transform. Also, it is shown through examples how this software operates. Electric circuits that are used in examples are Riordan gyrator network, 3rd order Butterworth Low-pass Filter, Subtractor and Adder.
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Murashov, I., V. Frolov, D. Ivanov, and A. Kvashnin. "Analysis of Electromagnetic Processes Inside the Arc Interrupting System of a High-current Circuit Breaker." PLASMA PHYSICS AND TECHNOLOGY 4, no. 2 (2017): 161–64. http://dx.doi.org/10.14311/ppt.2017.2.161.
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Description of electromagnetic processes inside an arc interrupting system of high-current circuit breaker is presented in article. Non-stationary mathematical model of the circuit-breaker operation (short-circuit currents mode) is developed. The main regularities of the displacement of the electric arc inside an arc chute are established. The influence of the movable contact position on the conditions for the displacement of the electric arc is presented. Also, the influence of the arc chute material on the motion and interrupting of an electric arc (alternating and direct currents) is established.
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Takigawa, Kiyoshi, Atushi Hamada, Kensuke Kawasaki, and Hiromu Ariyoshi. "Analysis of Stability Control of a Power System with a Distributed Constant Circuit Model." Journal of Circuits, Systems and Computers 07, no. 04 (August 1997): 221–30. http://dx.doi.org/10.1142/s0218126697000164.
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From the load cut off tests on generators, it is well known that the power disturbance is transmitted from the test point to the other points with constant delay time. The phenomena shows that the electric power system has a similar dynamic characteristic to the distributed constant circuits. In this paper, the electric power system is expressed with the distributed constant circuit, so that the main disturbance characteristics are obtained without difficulty. Moreover, the method of suppressing the plural disturbances is discussed by employing the active sink method.
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Djekidel, Rabah, Ahmed Bessedik, and Abdechafik Hadjadj. "Electric field modeling and analysis of EHV power line using improved calculation method." Facta universitatis - series: Electronics and Energetics 31, no. 3 (2018): 425–45. http://dx.doi.org/10.2298/fuee1803425d.
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This paper aims is devoted to modeling and simulation of electric field created by EHV power transmission line of 275 kV using an efficient hybrid methodology, the charge simulation method (CSM) with the Simplex Simulated Annealing (SIMPSA) algorithm in order to find the optimal position and number of fictitious charges used in CSM for an accurate calculation. Various factors that affect the electric field intensity were analyzed; it is found that the influence of the conductor sagging is clearly remarked, the maximum electric field strength at 1 m above the ground level recorded at mid-span point of the power line is 3.09 kV/m, in the proximity of the pylon, the maximum value is significantly reduced to 1.28 kV/m. The configuration type of the transmission line (single or double circuit) and the arrangements of phase conductors on double circuit pylons have a significant effect on the levels of electric field around the transmission line. For a single circuit, the triangular configuration provides the lowest maximum value of electric field. For a double circuit, the inverse phase arrangement (abc-cba) or low-reactance phasing produces the lowest maximum value of electric field. The resulting maximum electric field levels were found below the exposure values set by the ICNIRP and IRPA standards for both occupational and general public. The simulation results of electric field are compared with those obtained from the COMSOL 4.3b Multiphysics software, a fairly good agreement is found.
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VOLCHKOV, YURI D. "ENGINEERING ANALYSIS OF THE THREE-PHASE SHORT CIRCUIT MODE IN THE 10 KV ELECTRIC NETWORK TAKING INTO ACCOUNT THE INFLUENCE OF LOAD CURRENTS." Agricultural engineering, no. 6 (2021): 74–83. http://dx.doi.org/10.26897/2687-1149-2021-6-74-83.
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Abstract. The load current aff ects the value of the short-circuit current in the electric network and, consequently, the voltage value. In some cases, this infl uence must be taken into account for the correct choice of switching devices, remote monitoring the operating modes of electric networks, and determining the modes. It is possible to disconnect loads connected through magnetic starters and contactors. Failure to consider the infl uence of the load current can lead to an incorrect interpretation of the identifi ed grid operating modes during remote monitoring and, as a result, incorrect dispatcher’s decisions. In addition, it is also insuffi cient to specify the choice of switching devices in the 10 kV feed network. The article describes a method for analyzing the three-phase short circuit mode in a 10 kV feed network, taking into account the infl uence of load currents. The method is exemplifi ed by the case of an actual electric network – the 10 kV ring feed network containing reclosers and receiving power from diff erent sections of lowvoltage buses of the “Kulikovskaya” 110/35/10 kV substation, belonging to the Branch of PJSC «DGC of Center”-“Orelenergo.” For this network, the values of the three-phase short-circuit currents at points with diff erent distances from the substation buses have been determined. The authors have fi guredout the values of the load currents and their shares in the total short-circuit current. The voltage values at different points of the network in the case of short circuits have also been determined. The research proves that the effect of the load current on the total short-circuit current should be taken into account for the case of remote short circuits.
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Liu, Ying Chun, Jian Ming Zhang, De Long Zhang, Yan Yu Wang, Chun Guang Hou, Zi Ping Wang, Hua Xin Liu, and Chun Rui Liu. "The Electric Car Charger Control Circuit Design and Analysis Module." Advanced Materials Research 971-973 (June 2014): 942–45. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.942.
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the article introduces theelectric car charger control circuit design thinking and ideas, the controlcircuit to be able to with the front-end circuit switching power supply and MCUto cooperate to complete the following phases the constant current and constantvoltage charging battery automatic conversion, and stable in each phase of thecurrent value or the voltage value. Analyze the circuit module, includingsampling module, PWM signal module, proportional amplifier module, PIadjustment module.
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Kramarov, Andrey, Aleksandr Pavlenko, Denis Batishchev, and Igor Trocenko. "Overview of Solutions and Design Methods for Linear Electric Generators with Permanent Magnets." Известия высших учебных заведений. Электромеханика 64, no. 6 (2021): 36–51. http://dx.doi.org/10.17213/0136-3360-2021-6-36-51.
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An overview of methods for calculating and designing linear electric generators with permanent magnets is given. The techniques are grouped according to the type of calculation approach used. A detailed analysis of the proposed methods and assumptions is carried out, conclusions are drawn about the possibility of their use in the design of electric generators with permanent magnets with solid magnetic circuit elements. The main assumptions are related to the representation of the parameters of the equivalent circuits of magnetic systems. It was found that the main part of the methods does not take into account the influence of magnetic hysteresis and eddy currents in solid elements of the magnetic circuit. It is shown that many approaches aimed at designing electric machines with permanent magnets can be adapted to linear electric generators.
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Korotkevich, M. A., and A. L. Starzhinskij. "THE ANALYSIS OF STRUCTURAL RELIABILITY OF THE MAIN ELECTRIC CONNECTION CIRCUITS OF NUCLEAR POWER PLANTS." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 60, no. 3 (May 17, 2017): 191–97. http://dx.doi.org/10.21122/1029-7448-2017-60-3-191-197.
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The reliability of the main circuit of electrical connections at a nuclear electric power plant that has two units with a capacity of 1,200 MW each has been determined. Reliability, economical, maneuverable properties of the atomic power plant under study are largely determined by its main circuit, so the choice of the circuit for the design and its status in the process of operation occur to be critical objectives. Main electrical connection circuits in nuclear electric power plants are selected on the basis of the schematic networks of the energy system and the land attached to the plant. The circuit of the connection of a nuclear power plant to the grid in the original normal operating modes at all stages of the construction of such a plant should provide the outcome of the full added capacity of a nuclear power plant and the preservation of its stability in the power system without the influence of the emergency system automatics when any outgoing transmission line is disabled. When selecting the main circuit the individual capacity of the installed units and their number are taken into account as well as the order of development of the plant and power supply system; the voltage on which the power of a plant is delivered; a shortcircuit current for switchgear high voltage and the need for their limitation by circuit means; the most power that can be lost when damage to any switch. A model of reliability of the main circuit of electrical connections is designed to detect all types of accidents that are possible at the coincidence of failures of elements with the repair and operational modes that differs in composition and damageability of the equipment, as well as under conditions of the development of accidents due to failure of operation of devices of relay protection and automation.
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Cheng, Peng, Peng Qin, and Ji Hui Li. "Research and Simulation Analysis on Fault of Marine Integrated Electric Propulsion System." Advanced Materials Research 722 (July 2013): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amr.722.116.
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In this paper, neutral grounding mode, short-circuit failure and loss of excitation of marine integrated electric propulsion system are analyzed and summarized. Marine integrated electric propulsion system module is built in PSCAD/EMTDC. Diesel generator and its excitation module, permanent magnet synchronous propulsion motor and load module,inverter module is included in the system, Short-circuit failure and loss of excitation was added to the simulation system. The changing process of ship electric propulsion system failure is obtained.
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Panchenko, Serhii, Vladyslav Panchenko, and Oleksandr Turenko. "ANALYSIS OF EMERGENCY MODES OF TRACTION INDUCTION ELECTRIC DRIVE." Collection of Scientific Works of the Ukrainian State University of Railway Transport, no. 203 (March 27, 2023): 56–63. http://dx.doi.org/10.18664/1994-7852.203.2023.277955.
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The operation process of the traction asynchronous electric drive of the rolling stock may be accompanied by the occurrence of emergency modes, which are characterized by current overloads and may lead to damaging power electric circuits or mechanical part of the electric drive. Therefore, studying electromagnetic processes that occur in emergency modes of operation is relevant, in particular, for developing systems aimed at diagnosing and protecting traction equipment. Ukrainian and foreign studies of emergency modes in an asynchronous electric drive were analyzed. The most frequent causes of emergency modes are failures in static converters, therefore it is advisable to conduct an analysis of electromagnetic processes specifically in autonomous inverters. Using Matlab/Simulink software environment a simulation model of the vector control system of the traction asynchronous electric drive with spatial vector pulse width modulation was developed, and the short-circuit modes of the power switch of the autonomous voltage inverter and the disappearance of the supply voltage were simulated. The oscillograms of electromagnetic processes in these modes were shown and compared with the nominal mode of operation. The simulation results show that the analyzed emergency modes, even with a short duration of less than 0.5 s, can lead to significant damage to the electric drive. Both cases lead to significant current overloads: in the case of a short circuit of the power switch, a three-fold excess of the phase current is observed, during recovery after a supply voltage failure, the phase currents increase to the starting level, as well as an almost instantaneous increase in the supply voltage on the input filter capacitor occurs. The Fourier analysis of the phase A current in the above emergency modes shows an increase in the coefficient of nonlinear distortions by 65 %, a decrease in the amplitude of the main harmonic to 60 %, and the appearance of a significant number of subharmonics. In the case of a short circuit, the amplitudes of the subharmonics even exceed the fundamental harmonic. In addition, the process of returning from the emergency mode to normal at the first moment of time was characterized by a reduced moment of resistance (20 % of the nominal), and then by an exit to the nominal parameters.
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Saldaña, Gaizka, José Ignacio San Martín, Inmaculada Zamora, Francisco Javier Asensio, and Oier Oñederra. "Analysis of the Current Electric Battery Models for Electric Vehicle Simulation." Energies 12, no. 14 (July 18, 2019): 2750. http://dx.doi.org/10.3390/en12142750.
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Electric vehicles (EVs) are a promising technology to reduce emissions, but its development enormously depends on the technology used in batteries. Nowadays, batteries based on lithium-ion (Li-Ion) seems to be the most suitable for traction, especially nickel-manganese-cobalt (NMC) and nickel-cobalt-aluminum (NCA). An appropriate model of these batteries is fundamental for the simulation of several processes inside an EV, such as the state of charge (SoC) estimation, capacity and power fade analysis, lifetime calculus, or for developing control and optimization strategies. There are different models in the current literature, among which the electric equivalent circuits stand out, being the most appropriate model when performing real-time simulations. However, impedance models for battery diagnosis are considered very attractive. In this context, this paper compares and contrasts the different electrical equivalent circuit models, impedance models, and runtime models for battery-based EV applications, addressing their characteristics, advantages, disadvantages, and usual applications in the field of electromobility. In this sense, this paper serves as a reference for the scientific community focused on the development of control and optimization strategies in the field of electric vehicles, since it facilitates the choice of the model that best suits the needs required.
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Strizhkov, I. G., E. N. Chesnyuk, and R. B. Goldman. "Harmonic Analysis of Non-sinusoidal Currents During Heating of Transformers." Machinery and Equipment for Rural Area, no. 8 (August 27, 2023): 40–42. http://dx.doi.org/10.33267/2072-9642-2023-8-40-42.
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The results of the analysis of currents in the transformer windings when heated by low-frequency short-circuit currents are presented, for the description of which the Fourier series expansion of piecewise exponential functions is used. This makes it possible to mathematically model the heating process and solve the issues of the ratio of the power released in the electric and magnetic circuits of the transformer.
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Kokot, M., and Jan Holnicki-Szulc. "Health Monitoring of Electric Circuits." Key Engineering Materials 293-294 (September 2005): 669–76. http://dx.doi.org/10.4028/www.scientific.net/kem.293-294.669.
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A methodology of defect identification in linear DC circuits based on so called Virtual Distortion Method (VDM) will be presented. The proposed approach takes adventage of the analogy linking mechanical models of truss structures and electric circuits. In this paper we cover the issue of modelling defects in electric circuits by compatible state of distortions, next we introduce the concept of influence matrix Dij, which describes global sensitivity of the circuit and enables fast recalculation of system response, and we formulate a gradient method of defect identification (inverse problem) based on local current and voltage measurements. In the following analysis we focus on so-called impotent states of distortions, which are the source of ambiguity of solution. We show that these difficulties can be overcome by a proper measuring strategy.
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Goto, Takahiro, Yasuhiro Sugimoto, Daisuke Nakanishi, Keisuke Naniwa, Sho Ishibashi, Yoichi Masuda, and Koichi Osuka. "Analysis of electric-free pneumatic circuits based on logic circuit and its application." Nonlinear Theory and Its Applications, IEICE 15, no. 2 (2024): 459–72. http://dx.doi.org/10.1587/nolta.15.459.
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Akca, Hakan, and Ahmet Aktas. "Examination and experimental comparison of dc/dc buck converter topologies used in wireless electric vehicle charging applications." An International Journal of Optimization and Control: Theories & Applications (IJOCTA) 14, no. 2 (February 29, 2024): 81–89. http://dx.doi.org/10.11121/ijocta.1503.
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The studies on Wireless Power Transfer (WPT) technology and peripherals in Electric Vehicle (EV) applications are intensifying. While the energy received from the WPT system is transferred to the EV battery, the direct current (dc)/dc converter circuits are used. The dc/dc buck converter topologies are one of them. The converter circuits must be highly efficient, lightweight, and compact to have a high range in EV vehicles. There are asynchronous buck, synchronous buck, and interleaved synchronous buck converter circuit topologies from the literature. In this study, the efficiency results of these circuit topologies were analyzed using MATLAB/Simulink and experimental studies. This study contributes to the literature by conducting circuit-level efficiency analysis and component-level power loss analysis. It has been observed that the interleaved synchronous buck converter circuit operates at 99% efficiency at 1066 W. In addition, it has been shared with the oscilloscope results that the current ripples of this circuit topology are lower than other circuit converters. Specifically, there has been a significant reduction of 56% in power losses, particularly in the interleaved synchronous buck converter (ISBC). This study analyzes the dynamic behavior of the dc/dc buck converter topologies, and results about their performance are given.
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Jurić-Grgić, Ivica, Tonći Modrić, and Marin Mandić. "Transient Linear Circuit Analysis Using Finite Element Technique." Applied Sciences 12, no. 19 (September 23, 2022): 9554. http://dx.doi.org/10.3390/app12199554.
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In this paper, a novel algorithm for a transient linear circuit analysis based on the Finite Element Technique (FET) was established. The FET procedure allows a straightforward solution for complex electric circuits since it is based on the Finite Element Method (FEM) approach. The developed algorithm allows us to select various types of time integration schemes when forming a local system of equations for a coupled circuit finite element. To illustrate the basic principle of the developed FET-based algorithm and to perform transient analysis, a random coupled linear circuit was analyzed. Numerical solutions obtained using Heun’s and the generalized trapezoidal rule (ϑ-method) integration schemes were compared to the solution obtained by Matlab Simulink software. It was shown that the accuracy of results depends on the employed time integration scheme when performing the FET procedure. It was shown that using Heun’s method as the time integration scheme yields more accurate results than using the ϑ-method time integration scheme.
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BERSHADSKIY, Il'ya A., Aleksandr Yu GLADKOV, and Vladimir V. IVANILOV. "Analysis of Electrical Explosion Safety Based on Dynamic Electrical Circuit Switching Discharge Models." Elektrichestvo, no. 2 (2022): 19–28. http://dx.doi.org/10.24160/0013-5380-2022-2-19-28.
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A mathematical model describing a switching arc discharge in an RL electric circuit based on the Mayr equation is developed and tested. The body of mathematics representing an arc discharge appearing in an RL circuit that takes into account the dynamic current-voltage arc characteristic and arc thermal processes is described. The results from calculating the arc thermal inertia constant for the switching period for a resistive circuit by several known methods, including the values obtained during simulation, are given. It has been found that the arc discharge model that takes into account the arc thermal inertia constant dynamics calculated from the instantaneous values of the average discharge power (taking the cathode losses into account) gives better convergence of the simulation results. An improved mathematical model of discharge in resistive and inductive electrical circuits is proposed, which makes it possible to refine the well-known method for quantifying their intrinsic safety. The convergence with the minimal igniting parameters obtained experimentally for similar circuits is analyzed.
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Nedobitkov, A. I. "On specific short circuit parameters of 12 vautomobile electric systems." Pozharovzryvobezopasnost/Fire and Explosion Safety 29, no. 6 (January 13, 2021): 50–60. http://dx.doi.org/10.22227/pvb.2020.29.06.50-60.
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Introduction. The data presented in the article show that the problem of differentiating primary and secondary short circuits is very important. The purpose of the article is to develop a scientifically grounded research method for copper conductors of automobile electric systems showing signs of a short circuit to identify the cause of its damage in a fire investigation. Materials and methods. The research was conducted with the help of JSM-6390LV scanning electron microscope having an energy dispersive microanalysis unit attached, DuraScan 20 microhardness tester, and Fluke Ti400 infrared thermal imager. Results and discussion. It is experimentally proven that the microhardness of a copper conductor subjected to a primary short circuit differs from that of a copper conductor subjected to an overcurrent or external high temperature. Images of microhardness measurement areas of a copper conductor subjected to a primary short circuit are provided. The results of an energy dispersive analysis and characteristic diagnostic features allowing to establish the cause of the copper conductor damage in case of fire (primary or secondary short circuit) are provided. The temperature of the copper conductor is measured for short circuits that entail sparking and an arc. The applicability of the computational method for determining the conductor temperature in the event of a short circuit is experimentally proved. Conclusions. A differentiation method is proposed for telling primary short circuits from secondary ones arising in copper conductors of automobile electrical systems. It is shown that the microhardness testing method can supplement the scanning electron microscopy method. The results provided in the article can be used by specialists to study copper conductors extracted from burned vehicles in order to identify the mechanism of their damage and, eventually, the cause of the car fire.
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Kurilkin, Dmitry, Vladimir Grachev, and Valeriy Tanaev. "Defining Resistance in Traction Motor Circuit According to Microprocessor Control System Data." Bulletin of scientific research results 2022, no. 4 (December 24, 2022): 74–89. http://dx.doi.org/10.20295/2223-9987-2022-4-74-89.
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Purpose: To develop methodology for determining the actual resistance of traction electric drive (TED) circuits of a locomotive with electric power transmission and with refined calculation of voltage losses of a collector-brush apparatus according to microprocessor control system data. These data are necessary for calculating actual traction characteristics of a locomotive as well as its braking characteristics in electric braking modes. Methods: Methods of electric machine theory, statistical processing and regression analysis of experimental data were used. Results: Based on the statistical analysis of registration data of on-board diagnostics subsystem of 20 sections of 2TE116U and TEP70BS diesel locomotives, methods for determining resistance factual value for traction electric drive circuit as well as methods of refined calculation for voltage losses in a collector-brush apparatus are proposed and justified. The hypothesis on distribution normal law for the value of resistance and the possibility to use its mathematical expectation as an estimated value is confirmed. The limits of resistance possible changes for TED circuits of diesel locomotives 2TE116U and TEP70BS have been established. Practical significance: The results obtained allow us to clarify energy loss amounts in a locomotive traction drive when calculating its traction and braking characteristics. Data on the limits, allowed in exploitation, of active resistance change for TED serviceable chains may be used for operative diagnostics of locomotive power circuit.
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di Benedetto, Marco, Luca Bigarelli, Alessandro Lidozzi, and Luca Solero. "Efficiency Comparison of 2-Level SiC Inverter and Soft Switching-Snubber SiC Inverter for Electric Motor Drives." Energies 14, no. 6 (March 18, 2021): 1690. http://dx.doi.org/10.3390/en14061690.
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This paper focuses on the investigation and implementation of a high-performance power conversion system to reduce the overvoltage phenomenon in variable speed electric drive applications. Particularly, the pros and cons of using Silicon Carbide power MOSFETs in the power converter when a long power cable is employed in electric motor drive systems has been addressed. The three-phase two level inverter with the addition of snubber circuits that consist of capacitors and diodes has been investigated, designed and tested in order to mitigate the overvoltage problems without sacrificing the conversion efficiency. Given that the snubber circuit added to the switches can increase losses, an additional circuit is used to recover the energy from the snubber circuit. The proposed analysis has been then validated through an experimental campaign performed on the converter prototype. The experimental results show that the proposed converter can reduce the overvoltage at the electric motor terminals with excellent conversion efficiency compared to the classical solution like the three-phase two level inverter.
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Deng, Jiang Hua, Yi Ming Zheng, Chao Tang, and Yan Ran Zhan. "Analysis of Charge Circuit and Discharge Circuit in Electromagnetic Riveting." Applied Mechanics and Materials 241-244 (December 2012): 606–9. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.606.
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The analysis of charge circuit and discharge circuit is a key part in the theoretical study of electromagnetic riveting electromagnetic field. Numerical simulation was used to establish the charge circuit model and the discharge circuit model which was an electric circuit-magnetic circuit coupling process by ANSYS. The simulation of charge circuit shows that the development of the charge current over time is an exponential descending change and that of the charge voltage over time is an exponential ascending change. And, the simulation of discharge circuit indicates that the driver is mainly subjected to axial magnetic force, whose distribution is non-uniform along the radial direction of driver, and the maximum value of axial magnetic force locates in about half of the driver radius.
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Mozga, Łukasz, and Tomasz Stoeck. "Evaluation of selected electric circuit simulators." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 9 (September 30, 2018): 162–64. http://dx.doi.org/10.24136/atest.2018.307.
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This article describes the characteristics of circuit simulators that are available from any web browser and therefore do not require installation on the local computer's hard disk. They highlighted their principle of operation, library resources and practical use. The analysis was performed for the timer circuit.
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Sinyukova, T. V., V. N. Meshcheryakov, and A. V. Sinyukov. "Research of control systems for lifting and transport mechanisms." Power engineering: research, equipment, technology 23, no. 3 (July 20, 2021): 47–61. http://dx.doi.org/10.30724/1998-9903-2021-23-3-47-61.
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THE PURPOSE. To investigate the existing methods of frequency control and their influence on the characteristics of the asynchronous motor, including the energy parameters. Consider new circuit solutions of the control type under study. Create a mathematical model of each of the methods of frequency control. To analyze the results obtained from the point of view of the behavior of mechanical, electromechanical and energy components. METHODS. When solving this problem, the method of computer simulation modeling, implemented by means of Matlab Simulink, was used. RESULTS. In this paper, various aspects of electric drive systems based on asynchronous motors with the use of cascade switching are studied and described, existing connection schemes for such systems are analyzed, and several new options with improved characteristics are proposed. A comparative analysis of various connection schemes is made, the most interesting results of such analysis are presented, and conclusions are drawn about the future prospects of certain circuit solutions.Electric drive systems were modeled in the Simulink MATLAB environment using software tools to demonstrate the operation parameters of the considered circuits. CONCLUSION. Various schemes for switching on the asynchronous motor in the Simulink Matlab environment were investigated. The results of the study revealed the potential usefulness of using a circuit with a transformer in the rotor circuit, as well as the construction of a multi-motor electric drive with a common transformer and a common frequency converter circuit. The efficiency of parallel connection of rotary circuits of a two-motor electric drive was demonstrated. The methods of returning the sliding energy to the network are also compared, and their effectiveness in a comparative analysis with the operation in the closed-loop rotor mode is demonstrated.
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Kuptsov, Daniil V., and Regina T. Khazieva. "ANALYSIS OF CIRCUIT SOLUTIONS AND WAYS TO INCREASE ENERGY EFFICIENCY." ELECTRICAL AND DATA PROCESSING FACILITIES AND SYSTEMS 19, no. 2 (2023): 73–79. http://dx.doi.org/10.17122/1999-5458-2023-19-2-73-79.
Full textAbstract:
Relevance An inductive-capacitive converter (ICC) is one of the main elements of a capacitive storage device. With the right choice of the ICC scheme in a particular device, it is possible to achieve the necessary energy efficiency indicators of the final installation. The article sets the task of choosing the most energy-efficient design scheme of an inductive-capacitive converter for a capacitive storage device, which can be used in an electrohydroimpulse cleaning device, as well as in electric vehicle charging stations. Aim of research Conduct an analytical review of existing circuits of an inductivecapacitive current converter and choose the most energy-efficient circuit for charging a capacitive storage device. Research methods Analytical review of scientific literature. Results As a result of the analytical review of the existing circuit designs of the inductive-capacitive converter, a circuit that meets the necessary energy efficiency requirements has been selected.