Journal articles: 'Low voltage motors'

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Popa, Gabriel Nicolae, and Corina Maria Diniș. "Complex Electronic Protection for Low-voltage Three-phase Induction Motors." WSEAS TRANSACTIONS ON ELECTRONICS 11 (May 7, 2020): 11–17. http://dx.doi.org/10.37394/232017.2020.11.2.

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Low-voltage three-phase induction motors are most often used in industrial electric drives. Electric motors must be protected by electric and/or electronic devices against: short-circuit, overloads, asymmetrical currents, two-phase voltage operation, under-voltage, and over-temperature. To design the electronic protection currents, voltages and temperature must be measured to determine whether they fall within normal limits. The electronic protection was design into low capacity PLC. The paper presents the designs and analysis of complex electronic protection for general purpose low-voltage three-phase induction motors. The electronic protection has Hall transducers and conversion electronic devices for AC currents to DC voltages, AC voltages to DC voltage, temperature to DC voltage, a low capacity PLC, switches, motor’s power contactors, and signalling lamps has been developed. Experiments with complex electronic protection, for different faults are presented. The proposed protection has the advantages of incorporating all usual protections future for the low-voltage three-phase induction motors.

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Romanova, Victoria, and Sergey Khromov. "Operational reliability of low-voltage asynchronous motors at asymmetrical supply voltage." E3S Web of Conferences 139 (2019): 01053. http://dx.doi.org/10.1051/e3sconf/201913901053.

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Issues of operating modes of 4A series asynchronous squirrel-cage motors and AI serried motors at asymmetrical supply voltage for different values of motor shaft load are considered on the basis of simulation using Matlab software package and Simulink package. In the simulation, currents in asynchronous motor phases were evaluated as a function of K2U, KZ, and based on these results, permissible operation parameters were evaluated for induction motors. The results obtained are the basis for technical solutions aimed at improving operational reliability of asynchronous motors, they will allow taking into account permissible operating parameters of asynchronous motors not only in the design, but also in operation in power supply systems of various facilities.

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Chausovsky, Alex. "Low voltage motors market analysed." World Pumps 2014, no. 5 (May 2014): 16–17. http://dx.doi.org/10.1016/s0262-1762(14)70105-1.

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Belsare, Karan S., and Gajanan D. Patil. "Advance Protection for Three Phase Induction Motor using Microcontroller Atmega32." International Journal of Advanced Research in Computer Science and Software Engineering 8, no. 1 (January 30, 2018): 172. http://dx.doi.org/10.23956/ijarcsse.v8i1.566.

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A low cost and reliable protection scheme has been designed for a three phase induction motor against unbalance voltages, under voltage, over voltage, short circuit and overheating protection. Taking the cost factor into consideration the design has been proposed using microcontroller Atmega32, MOSFETs, relays, small CTs and PTs. However the sensitivity of the protection scheme has been not compromised. The design has been tested online in the laboratory for small motors and the same can be implemented for larger motors by replacing the i-v converters and relays of suitable ratings.

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Belsare, Karan S., and Gajanan D. Patil. "Advance Protection for Three Phase Induction Motor using Microcontroller Atmega32." International Journal of Advanced Research in Computer Science and Software Engineering 8, no. 2 (March 6, 2018): 30. http://dx.doi.org/10.23956/ijarcsse.v8i2.572.

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A low cost and reliable protection scheme has been designed for a three phase induction motor against unbalance voltages, under voltage, over voltage, short circuit and overheating protection. Taking the cost factor into consideration the design has been proposed using microcontroller Atmega32, MOSFETs, relays, small CTs and PTs. However the sensitivity of the protection scheme has been not compromised. The design has been tested online in the laboratory for small motors and the same can be implemented for larger motors by replacing the i-v converters and relays of suitable ratings.

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Höpner, Vanessa Neves, and Volmir Eugênio Wilhelm. "Insulation Life Span of Low-Voltage Electric Motors—A Survey." Energies 14, no. 6 (March 21, 2021): 1738. http://dx.doi.org/10.3390/en14061738.

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The use of static frequency converters, which have a high switching frequency, generates voltage pulses with a high rate of change over time. In combination with cable and motor impedance, this generates repetitive overvoltage at the motor terminals, influencing the occurrence of partial discharges between conductors, causing degradation of the insulation of electric motors. Understanding the effects resulting from the frequency converter–electric motor interaction is essential for developing and implementing insulation systems with characteristics that support the most diverse applications, have an operating life under economically viable conditions, and promote energy efficiency. With this objective, a search was carried out in three recognized databases. Duplicate articles were eliminated, resulting in 1069 articles, which were systematically categorized and reviewed, resulting in 481 articles discussing the causes of degradation in the insulation of electric motors powered by frequency converters. A bibliographic portfolio was built and evaluated, with 230 articles that present results on the factors that can be used in estimating the life span of electric motor insulation. In this structure, the historical evolution of the collected information, the authors who conducted the most research on the theme, and the relevance of the knowledge presented in the works were considered.

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Nogal, Łukasz, Andrzej Magdziarz, Désiré Dauphin Rasolomampionona, Piotr Łukaszewski, Łukasz Sapuła, and Radosław Szreder. "The Laboratory Analysis of the Thermal Processes Occurring in Low-Voltage Asynchronous Electric Motors." Energies 14, no. 8 (April 8, 2021): 2056. http://dx.doi.org/10.3390/en14082056.

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The exact nature of thermal processes occurring in an electric motor is often unknown. Thus, the estimation of temperature rise using mathematical models and computational experiments is becoming increasingly important. Thermal analysis is the key design aspect, which has become significant in the design process for electric motors. The thermal analysis of electric motors can be helpful in developing effective thermal monitoring methods. This analysis is crucial for a better understanding of the overall performance and failure prevention for these electrical motors. In this paper, laboratory investigations of thermal processes in low-voltage asynchronous motors are described. The analysis of the results leads to the conclusion that the classic single-exponential models do not match the dynamically changing thermal processes in electric motors especially in the case of intermittent motor operation.

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Cazacu, Emil, Valentin Ioniţă, and Lucian Petrescu. "TRANSIENT STATE CHARACTERIZATION OF ASYNCHRONOUS MOTORS IN MODERN LOW-VOLTAGE ELECTRIC INSTALLATIONS." Scientific Bulletin of Electrical Engineering Faculty 18, no. 1 (April 1, 2018): 19–25. http://dx.doi.org/10.1515/sbeef-2017-0017.

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Abstract: Low-voltage asynchronous motor is the most common load used in any industrial electric facility. Due to their robustness and reliability, the induction motors have a very large application spectrum and are to be found in a variety of power units. It is assumed that over 70% of total energy used in any electric utility is dedicated to the electric motor drive systems. The paper quantitatively studies the transient state of such motors, which occurs at their start-up. The waveforms characteristics of these inrush currents are predetermined mainly by solving the associated differential equations that describe the dynamic phenomena at their start-up. An experimental investigation on an induction motor of 4 kW is also carried out. Supplementary, different solutions for the energising of these low-voltage motors are presented highlighting their performances and limits. These methods are critically rated according to their mitigation ability of the power quality issues associated with the energizing process.

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Romanova, V. V., S. V. Khromov, and K. V. Suslov. "Analysis of influencing factors affecting the operational reliability of low-voltage asynchronous electric motors." Power engineering: research, equipment, technology 23, no. 3 (July 20, 2021): 95–104. http://dx.doi.org/10.30724/1998-9903-2021-23-3-95-104.

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THE PURPOSE. The main purpose of the work is a comprehensive study of external influences that affect the operational reliability of low-voltage asynchronous motors. Attention is focused on the evaluation of the operational reliability of electric motors, the systematization of their operating conditions, with the simultaneous impact of a group of operational factors. Among these factors that are subject to detailed analysis, we will highlight the following: the asymmetry of the stress and its duration, loading of the motor, the temperature of the environment. In this regard, it becomes obvious that the task of improving the operational reliability of low-voltage asynchronous electric motors depends on a qualitative study of the quantitative values of external influencing factors in various operating modes of electric motors. METHODS. The tool for implementing this task is a visual and effective simulation tool Simulink interactive programming environment Matlab. RESULTS. The research was performed on an asynchronous electric motor with a short-circuited rotor AIR160S8 with PH = 7,5 kW, rated speed n = 1500 rpm. The physical processes of the electric motor under study were modeled by changing the following parameters: the coefficient of stress asymmetry in the reverse sequence (K2U), the load on the motor shaft (Kz), the ambient temperature (tocr), and the duration of stress asymmetry in the reverse sequence (T). Based on the obtained simulation results, groups of planes of the studied quantities are constructed. CONCLUSION. A set of studies performed using the Matlab software package allowed us to estimate the limits of acceptable values of external factors and identify the area of acceptable operation of asynchronous motors. The analysis and discussion of the research results were carried out, and measures were proposed to improve the operational reliability of asynchronous electric motors.

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Romanova, V. V., S. V. Khromov, and K. V. Suslov. "Analysis of influencing factors affecting the operational reliability of low-voltage asynchronous electric motors." Power engineering: research, equipment, technology 23, no. 3 (July 20, 2021): 80–89. http://dx.doi.org/10.30724/1998-9903-2021-23-3-80-89.

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THE PURPOSE. The main purpose of the work is a comprehensive study of external influences that affect the operational reliability of low-voltage asynchronous motors. Attention is focused on the evaluation of the operational reliability of electric motors, the systematization of their operating conditions, with the simultaneous impact of a group of operational factors. Among these factors that are subject to detailed analysis, we will highlight the following: the asymmetry of the stress and its duration, loading of the motor, the temperature of the environment. In this regard, it becomes obvious that the task of improving the operational reliability of low-voltage asynchronous electric motors depends on a qualitative study of the quantitative values of external influencing factors in various operating modes of electric motors. METHODS. The tool for implementing this task is a visual and effective simulation tool Simulink interactive programming environment Matlab. RESULTS. The research was performed on an asynchronous electric motor with a short-circuited rotor AIR160S8 with PH = 7,5 kW, rated speed n = 1500 rpm. The physical processes of the electric motor under study were modeled by changing the following parameters: the coefficient of stress asymmetry in the reverse sequence (K2U), the load on the motor shaft (Kz), the ambient temperature (tocr), and the duration of stress asymmetry in the reverse sequence (T). Based on the obtained simulation results, groups of planes of the studied quantities are constructed. CONCLUSION. A set of studies performed using the Matlab software package allowed us to estimate the limits of acceptable values of external factors and identify the area of acceptable operation of asynchronous motors. The analysis and discussion of the research results were carried out, and measures were proposed to improve the operational reliability of asynchronous electric motors.

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11

Bogh, D., J. Coffee, G. Stone, and J. Custodio. "Partial-discharge-inception testing on low-voltage motors." IEEE Transactions on Industry Applications 42, no. 1 (January 2006): 148–54. http://dx.doi.org/10.1109/tia.2005.861369.

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12

Tuo, Chao Yong. "Studies on Implementations and Designs of DSP in the Six-Phase Induction Motor Vector Control System." Advanced Materials Research 268-270 (July 2011): 1681–86. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.1681.

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Compared with traditional three-phase motors, six-phase induction motors due to their high reliabilities and low DC side voltages can achieve high power drives using devices with lower voltage level. In this paper, it analyzes the research status of six-phase induction motors, introduces the winding structures of six-phase induction motors, and finally designs the vector control system for six-phase induction motors taking the Digital Signal Processor (DSP) as the core. It introduces DSP circuit implementations, emphasizes to describe software structures of the control system, and proposes a detailed software flow chart.

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Hasan, Athraa Sabeeh. "Simple, Low Cost, and Efficient Design of a PC-based DC Motor Drive." Journal of University of Babylon for Engineering Sciences 26, no. 9 (October 21, 2018): 1–14. http://dx.doi.org/10.29196/jubes.v26i9.1695.

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In industrial applications, requiring variable speed and load characteristics, the DC motor is the attractive piece of equipment; due to its ease of controllability. Pulse-width modulation (PWM) or duty-cycle variation methods are commonly used in speed control of DC motors. A simple, low cost, and efficient design for a control circuit uses the PWM to adjust the average voltage fed the DC motor is proposed in this paper. The objective of this paper is to illustrate how the DC motor's speed could be controlled using a 555 timer. This timer works like a changeable pulse width generator. The pulse width can be changed via relays to add or remove resistors in the timer circuit. Using relays enable the proposed circuit to drive higher-power motors. The designed circuit controls the speed of a Permanent Magnet PM DC motor by means of the parallel port of a PC; therefore, the user will be able to control the speed of the DC motor. C++ computer program is used to run the motor at four levels of speed. An interface circuit is used to connect the motor to the parallel port. PC based control software is chosen to get simplicity and ease of implementation.

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Sadowski, Emil, and Artur Pakosz. "Sensorless BLDC motor controller little power to the comfort of motor vehicles." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 6 (June 30, 2018): 708–11. http://dx.doi.org/10.24136/atest.2018.161.

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The article discusses low-power brushless motors and control modules that are used, among others, in trucks and buses. Also presented are methods of controlling brushless DC motors. The own low power controller was also implemented, enabling smooth start-up and control of the engine speed up to 3,000 revolutions and supply voltage up to 32V DC. This article also presents the results of the measurements of BLDC motor control used in automotive vehicles, mainly in trucks and buses.

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Gokyu, Toshio, Minoru Shimahara, Satoshi Matsuda, and Yukinobu Kitano. "Insulation diagnosis and environmental deterioration of low voltage induction motors." IEEJ Transactions on Industry Applications 107, no. 9 (1987): 1122–29. http://dx.doi.org/10.1541/ieejias.107.1122.

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Gokyu, Toshio, Minoru Shimahara, Satoshi Matsuda, and Yukinobu Kitano. "Insulation diagnosis and environmental degradation of low-voltage induction motors." Electrical Engineering in Japan 108, no. 6 (November 1988): 98–114. http://dx.doi.org/10.1002/eej.4391080610.

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Lowery, T. F., and D. W. Petro. "Application considerations for PWM inverter-fed low-voltage induction motors." IEEE Transactions on Industry Applications 30, no. 2 (1994): 286–93. http://dx.doi.org/10.1109/28.287532.

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Srinivasan, S., and Dr T. S. Sivakumaran. "Performance evaluation of multiple lift push-pull LUO converters for automotive applications." International Journal of Engineering & Technology 7, no. 2.20 (April 18, 2018): 174. http://dx.doi.org/10.14419/ijet.v7i2.20.12802.

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Solar energy power generation has several advantages such as low maintenance costs; environment friendly, no rotating parts in construc-tion gives no noise. In recent years, solar power is used to charge the batteries of electric vehicles and instead of internal combustion En-gines the Electric motors such as DC motors, Brushless DC (BLDC) motors are used for driving the vehicles. The Multiple Lift Push-Pull Luo (MLPPL) converter is a DC-DC converter, which combines both switched capacitor and voltage lift techniques. Further, the MLPPL converters can be used in high power density, high power efficiency and voltage transfer gain applications. In this work, a MLPPL convert-er integrated with voltage source inverter (VSI) loading BLDC motor drive for automotive applications have been proposed. Further, the simulation of the proposed design has been carried out using MATLAB/Simulink Software. The torque of the BLDC motor has been varied and the performance of the MLPPL converter has been analyzed. Results demonstrate that the proposed design is capable to operate over a wide range of torque, which fulfills the application of Electric Vehicle.

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Tripathi, Prabhat Ranjan, Vijaya Laxmi, Ritesh Kumar Keshri, Amitkumar Vidyakant Jha, Bhargav Appasani, Nicu Bizon, and Phatiphat Thounthong. "A Three-Phase Resonant Boost Inverter Fed Brushless DC Motor Drive for Electric Vehicles." Electronics 10, no. 15 (July 27, 2021): 1799. http://dx.doi.org/10.3390/electronics10151799.

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The present article proposes a three-phase resonant boost inverter (TPRBI) to feed a permanent magnet brushless DC (PMBLDC) motor at the requested torque with low ripples due to the sinusoidal current injected into the PMBLDC motor. PMBLDC motors have the highest torque-to-weight ratio compared to other motors and are the best choice for electric vehicle applications. Conventionally, these motors are driven by voltage source inverters (VSI) with trapezoidal current injection, introducing unwanted torque ripples. Moreover, due to the buck operation of VSI, an extra power conversion stage is required to elevate the battery voltage level to desired DC-link voltage. This extra stage increases the number of components used, complexity of control and decreases the efficiency and reliability of the overall system. TPRBI injects sinusoidal current in the PMBLDC motor in the proposed method, thus minimizing the torque ripples. The proposed inverter also has an inherent voltage boost characteristic, thus eliminating the extra power conversion stage. The single-stage conversion from DC to boosted sinusoidal AC enhances the system reliability and efficiency and minimizes the cost and weight of the system. A MATLAB/Simulink model is presented along with simulation results and mathematical validation. A comparative evaluation of the proposed system with the conventional VSI-fed PMBLDC motor is presented in terms of induced torque ripples.

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Anton, Anton, and Tuti Angraini. "UNJUK KERJA DAN PEMANFAATAN INVERTER SEBAGAI PENGENDALI KECEPATAN MOTOR INDUKSI 3 PHASA." Elektron : Jurnal Ilmiah 5, no. 2 (December 13, 2013): 87–92. http://dx.doi.org/10.30630/eji.5.2.59.

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The Induction motors are found in industrial and domestic environments because of low cost of operation including, induction motors are widely used induction motor 1 phase and 3 phase. During operation of induction motors generally used at normal speed, but the specific purpose induction motors operated with variable speed. In order to obtain varying motor speed can be controlled using the inverter. The use of inverters here to give supplay voltage AC induction motor in which the magnitude of the frequency can be varied. Setting frequency of the inverter utilizing method pulse with modulation (PWM). The circuit used to build PWM, using Insulated Gate Bipolar Transistor (IGBT) technology. Values obtained variable frequency ranging from 4 Hz to 50 Hz, and acquired motor speed ranging from 12 rpm up to 1390 rpm.

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Hsieh, Min-Fu, and Yun-Chung Weng. "A Low Torque Ripple Direct Torque Control Method for Interior Permanent Magnet Motor." Applied Sciences 10, no. 5 (March 3, 2020): 1723. http://dx.doi.org/10.3390/app10051723.

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This paper proposes a simple method to generate stable voltage commands for permanent magnet synchronous motors to achieve low torque ripple based on space vector modulation direct torque control (SVM-DTC). The relationship between applied voltage and electromagnetic torque is first analyzed and the effect of the voltage and flux linkage on torque ripple is discussed. Then, the new method is developed to reduce torque ripple by giving low-fluctuation voltage commands to the voltage source inverter. The magnitude of the voltage command is calculated by avoiding the effect of flux linkage angle that can be estimated inaccurately during motor operation. Therefore, the fluctuation of the voltage command can be significantly reduced. In order to validate the proposed method, Simulink is first used for simulation and the performance of the proposed method is evaluated. It is found that the torque ripple can be substantially reduced while keeping a low switching frequency and improving system response. Then, a hardware-in-the-loop (HIL) technique is applied to test the developed algorithm that is written into a Texas Instruments microcontroller. This validates the simulation results and the proposed method.

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Florkowski, Marek, Barbara Florkowska, and Pawel Zydron. "Partial Discharges in Insulating Systems of Low Voltage Electric Motors Fed by Power Electronics—Twisted-Pair Samples Evaluation." Energies 12, no. 5 (February 26, 2019): 768. http://dx.doi.org/10.3390/en12050768.

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Power electronics switching devices currently represent the dominant technology for supplying low voltage (LV) electric motors. The fast switching processes exert a different class of stress on dielectric insulating materials than standard sinusoidal excitations. Such stresses result in an increase in the dynamic activity of the working electric field, which in turn lead to an increased likelihood of partial discharges (PD). The stator design of low voltage motor is often in form of random-wound windings, where the magnet wires (copper or aluminum round wires coated with thin layer of insulation) form a common system of coils with not precisely defined mutual position of particular turns, resulting in various turn-to-turn and coil-to-coil voltage distributions. Pulse Width Modulated (PWM) voltage waveforms from modern electronic inverters are characterized by very short rise times and presence of repetitively occurring overvoltages that can significantly stress the insulation of feeding cables and motors. These factors influence the inception and dynamics of PD and processes of space charge accumulation in electrical insulation. In this paper investigations performed on round magnet wire twisted-pair samples representing LV motor random-wound winding elements are presented. Special attention was afforded to the twist configurations, observed breakdown voltage and PD activity. To describe the field conditions for the formation of PD in the turn-to-turn insulation system, the results of numerical simulations of electric field distributions for winding wires with different diameters, modeled using the COMSOL program, were analyzed. PD created in the insulating systems of model twisted-pair systems were registered and analyzed using the phase resolved partial discharge analysis (PRPDA) method.

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Beriber, D., A. Talha, and M. Boucherit. "Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors." Archives of Control Sciences 22, no. 1 (January 1, 2012): 107–20. http://dx.doi.org/10.2478/v10170-011-0015-1.

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Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors Voltage source multilevel inverters have become very attractive for power industries in power electronics applications during last years. The main purposes of studying multilevel inverters are the generation of output voltage signals with low harmonic distortion and reduction of switching frequency. An important issue of the multilevel inverter is the capacitor voltage-balancing problem. The unbalance of different DC voltage sources of multilevel neutral point clamped (NPC) voltage source inverter (VSI) constitutes the major limitation for the use of this new power converter. In this paper, we present study on the stability problem of the input DC voltages of the three-level Neutral Point Clamping (NPC) voltage source inverter (VSI). This inverter is useful for application in high voltage and high power area. In the first part, we remind the model of double stator induction motors (DSIM). Then, we develop control models of this inverter using the connection functions of the semi-conductors. We propose a Pulse Width Modulation (PWM) strategy to control this converter. The inverter is fed by constant input DC voltages. In the last part, we study the stability problem of the input DC voltages of the inverter. A cascade constituted by two three-level PWM rectifiers - two three-level NPC VSI - DSIM is discussed. The results obtained show that the input DC voltages of the inverters are not stable. To solve this problem, we propose to use a half clamping bridge. This solution is very promising in order to stabilize the input DC voltages of this converters.

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Lusuardi, L., A. Cavallini, M. Gomez de la Calle, J. M. Martinez-Tarifa, and G. Robles. "Insulation design of low voltage electrical motors fed by PWM inverters." IEEE Electrical Insulation Magazine 35, no. 3 (May 2019): 7–15. http://dx.doi.org/10.1109/mei.2019.8689431.

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Raj P R, Neethu, and Vasanthi V. "Performance Analysis of Photovoltaic Induction Motor Drive for Agriculture Purpose." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 4 (December 1, 2016): 1252. http://dx.doi.org/10.11591/ijpeds.v7.i4.pp1252-1260.

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<p>This paper presents water pumping system using renewable source (solar) without the use of chemical storage batteries. In this converter-inverter circuit is used to drive Induction motor. The Converter used here is Two Inductor boost converter (TIBC), which consists of a resonant tank, voltage doubler rectifier and a snubber circuit. TIBC is designed to drive the three phase induction motor from PV energy. TIBC converter is also known as current fed multi resonant converter having high voltage gain and low input current ripple. Converter switches are controlled through hysteresis controller and ZCS resonant topologies. Solar PV power fluctuates according to irradiation level of sunlight and hence tracking of maximum power at all time is mandatory. SPWM control with third harmonic injection is used to trigger the IGBT’s in the inverter. The development is oriented to achieve a more efficient, reliable, maintenance free and cheaper solution than the standard ones, that uses DC motors or low voltage synchronous motors. The proposed method is verified with MATLAB/SIMULINK and the system simulation confirms the performance of the proposed system.</p>

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Song, Xing Yu, Jing Chen, Shi Jie Deng, You Xin Yuan, and Qing Wang. "Modeling and Simulation of Motor Discrete Variable Frequency Soft Starting Based on the Variable Reactance." Applied Mechanics and Materials 571-572 (June 2014): 930–33. http://dx.doi.org/10.4028/www.scientific.net/amm.571-572.930.

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The started motors are characterized by the low staring torque and large currents when the motors draw the heavy-loads. Therefore, a method of motor discrete variable frequency soft starting based on the variable reactance is presented in this paper [1,2]. According to the topological structure and working principle of motor discrete variable frequency soft starting based on the variable reactance, the simulation model of the system has been set up by the Matlab/Simulink tool. Simulation results show that the motor starters developed with this method have been successfully applied to the loads of the drive equipment in the kiln, coal grinding mill or the mine. It can improve the starting performance when the motors draw the heavy-loads., save energy, stabilize the voltage of the power supply network.

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Bharatiraj, C., JL Munda, Ishan Vaghasia, Rajesh Valiveti, and P. Manasa. "Low cost Real Time Centralized Speed Control of DC Motor Using Lab view -NI USB 6008." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 3 (September 1, 2016): 656. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp656-664.

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The DC motors an outstanding portion of apparatus in automotive and automation industrial applications requiring variable speed and load characteristics due to its ease of controllability. Creating an interface control system for multi DC motor drive operations with centralized speed control, from small-scale models to large industrial applications much demand. By using Lab VIEW (laboratory virtual instrument engineering workbench) as the motor controller, can control a DC motor for multiple purposes using single software environment. The aim of this paper is to propose the centralized speed control of DC motor using Lab VIEW. Here, the Lab VIEW is used for simulating the motor, whereas the input armature voltage of the DC motor is controlled using a virtual Knob in Lab VIEW software. The hardware part of the system (DC motor) and the software (in personal computer) are interfaced using a data acquisition card (DAQ) -Model PCI- 6024E. The voltage and Speed response is obtained using LABVIEW software. Using this software, group of motors’ speed can be controlled from different location using remote telemetry. The propose work also focuses on controlling the speed of the individual DC motor using PWM scheme (Duty cycle based Square wave generation) and DAQ. Help of the DAQ along with Lab VIEW front panel window, the DC motor speed and directions can be change easily in remote way. In order to test the proposed system the laboratory model for an 80W DC motor group (multi drive) is developed for different angular displacements and directions of the motor. The simulation model and experimental results conforms the advantages and robustness of the proposed centralized speed control.

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Adouni, Amel, and Antonio J. Marques Cardoso. "Thermal Analysis of Low-Power Three-Phase Induction Motors Operating under Voltage Unbalance and Inter-Turn Short Circuit Faults." Machines 9, no. 1 (December 26, 2020): 2. http://dx.doi.org/10.3390/machines9010002.

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Three-phase induction motors are considered to be the workhorse of industry. Therefore, induction motor faults are not only the cause of users’ frustrations but they also drive up the costs related to unexpected breakdowns, repair actions, and safety issues. One of the most critical faults in three-phase induction motors is related to the occurrence of inter-turn short circuits, due to its devastating consequences. The topic of inter-turn short-circuit faults in three-phase induction motors has been discussed over recent decades by several researchers. These studies have mainly dealt with early fault detection to avoid dramatic consequences. However, they fall short of addressing the potential burnout of the induction motor before the detection step. Furthermore, the cumulative action played by an inevitable degree of unbalanced supply voltages may exacerbate such consequences. For that reason, in deep detail, this paper delves into the thermal analysis of the induction motor when operating under these two harsh conditions: unbalanced supply voltages and the presence of the most incipient type of inter-turn short-circuit condition—a short-circuit between two turns only. In this work, the finite element method has been applied to create the faulty scenarios, and a commercial software (Flux2D) has been used in order to simulate the electromagnetic and thermal behavior of the machine for various degrees of severity of the aforementioned faulty modes. The obtained results confirm that the diagnostic tools reported in the literature might not be effective, failing to warrant the required lead time so that suitable actions can be taken to prevent permanent damage to the machine.

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Roger, Daniel, and Ewa Napieralska-Juszczak. "Voltage distribution in the windings of high temperature inverter-fed motors." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 5 (September 3, 2018): 1824–36. http://dx.doi.org/10.1108/compel-01-2018-0024.

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Purpose High-temperature (HT°) motors are made with inorganic coils wound with a ceramic-coated wire. They must be carefully designed because the HT° insulating materials have a lower breakdown voltages than the polymers used for insulating standard machines. Design/methodology/approach The voltage distribution between stator coils is computed with high-frequency (HF) equivalent circuits that consider the magnetic couplings and the stray capacitances. Two time scales are used for getting a fast computation of very short voltage spikes. For the first step, a medium time scale analysis is performed considering a simplified equivalent circuit made without any stray capacitance but with the full PWM pattern and the magnetic couplings. For the second step, a more detailed HF equivalent circuit computes voltage spikes during short critical time windows. Findings The computation made during the first step provides the critical time windows and the initial values of the state variables to the second one. The rise and fall time of the electronic switches have a minor influence on the maximum voltage stress. Conversely, the connection cable length and the common-mode capacitances have a large influence. Research limitations/implications HF equivalent circuits cannot be used with random windings but only to formed coils that have a deterministic position of turns. Practical implications The proposed method can be used designing of HT° machine windings fed by PWM inverter and for improving the coils of standard machine used in aircraft’s low-pressure environments. Originality/value The influence of grounding system of the DC link is considered for computing the voltage spikes in the motor windings.

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Guo, Qiang, Zhiping Dong, Heping Liu, and Xiaoyao You. "Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor." Energies 13, no. 3 (January 28, 2020): 590. http://dx.doi.org/10.3390/en13030590.

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This paper proposes a scheme that can compensate for the nonlinear characteristics of voltage source inverters (VSIs) for low-voltage delta-connected induction motors (IMs). Due to the nonlinearity introduced by the dead-time, the on/off delay, and the voltage drop across the power device, the output voltage of VSIs is seriously distorted, causing distortion in the phase current of the IM, which will lead to output torque ripple. However, the existing compensation methods for three-phase VSIs are derived from star-connected loads, or ignore the conducting properties of power devices. Moreover, the current polarity detection near the current zero is quite complex. In this paper, by taking such nonlinear characteristics into consideration, especially the conducting property of metal-oxide-semiconductor field effect transistors (MOSFETs), an output voltage model of VSIs for low-voltage delta-connected induction motors is presented. After that, in view of the difficulty in detecting the line current polarity near the current zero which might lead to the wrong compensation, an advancing current crossing zero (ACCZ) compensation is proposed. Subsequently, a compensation scheme which combines the compensation based on the VSI output voltage model and ACCZ compensation is proposed. Finally, the proposed compensation scheme is implemented based on a digital signal processor (DSP) drive system. The experimental results show that the proposed scheme has better performance than the common method in terms of suppressing the effect of the nonlinear characteristics of VSI, which demonstrates that the proposed compensation scheme is feasible and effective for the compensation of the nonlinear characteristics of VSI for low-voltage delta-connected IMs.

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Li, Xiao Ming, Huan Wu, Yun Zhao, and Shi Qi Liu. "The Study on a New Type of Full-Voltage Starting Method of Asynchronous Motors." Advanced Materials Research 383-390 (November 2011): 400–407. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.400.

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For various problems in the procedure of high-power induction motor’s starting and disadvantages of traditional starting methods, this paper proposed a new type of full-voltage starting method of high-power induction motor—a full-voltage starting method with dynamic reactive power compensation, introduced its principle, studied the control strategy of full-voltage starting with dynamic var compensation emphatically, and established the simulation model for direct starting, soft starting and full-voltage starting with dynamic var compensation based on the Matlab/Simulink simulation software to do digital simulation and compared three methods. The simulation results indicated that the method proposed in this paper can make the high-power induction motor start fast and smoothly with both high-torque and low starting current, and it has a better starting performance than traditional starting methods and the advantage of not affecting power quality.

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Hegde, Shreekara S., and A. N. Nagashree. "Enhancement of Power Quality and Speed Regulation of a BLDC Motor Drive using Water Cycle Algorithm." Volume 5 - 2020, Issue 8 - August 5, no. 8 (August 26, 2020): 541–50. http://dx.doi.org/10.38124/ijisrt20aug382.

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Permanent magnet Brushless DC motors are used in several applications because of its advantages such as high reliability, high power output, constant torque, low maintenance cost, good heat dissipation and better efficiency. Also, rapidly decreasing cost of permanent magnets is an added advantage. Hence, BLDC motors are suitable for many variable-speed drive applications. Various DC-DC converters are used for driving the BLDC motor and Interleaved Boost converter is one of them. BLDC motor drive is fed through a diode bridge rectifier which lowers the power factor. Hence, power factor correction converters are necessary in such applications. In the present work, to improve the power quality of the AC mains and hence the power factor, Interleaved boost converter controlled by PI controller is used. The gains of the PI controller are decided by Water cycle algorithm (WCA) using Integral Time Absolute Error (ITAE) criterion. Speed control of the BLDC motor is done by controlling the output voltage of the converter which acts as a DC link voltage to the Three Phase Voltage Source Inverter (VSI). MATLAB SIMULINK software is used for the design and performance analysis of the BLDC.

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Andrianov, M. V., and R. V. Rodionov. "Technique for evaluating the energy efficiency of modern low-voltage asynchronous motors." Russian Electrical Engineering 79, no. 11 (November 2008): 604–7. http://dx.doi.org/10.3103/s1068371208110035.

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Benecke, Jens, André Linde, and Stefan Dickmann. "Automatic HF model generation and impedance optimization for low voltage DC motors." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 29, no. 5 (September 14, 2010): 1294–308. http://dx.doi.org/10.1108/03321641011061506.

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Iosif, Vadim, Daniel Roger, Stéphane Duchesne, and David Malec. "Assessment and improvements of inorganic insulation for high temperature low voltage motors." IEEE Transactions on Dielectrics and Electrical Insulation 23, no. 5 (October 2016): 2534–42. http://dx.doi.org/10.1109/tdei.2016.7736810.

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Delli Colli, V., P. Cancelliere, F. Marignetti, and R. Di Stefano. "Influence of voltage and current source inverters on low-power induction motors." IEE Proceedings - Electric Power Applications 152, no. 5 (2005): 1311. http://dx.doi.org/10.1049/ip-epa:20045243.

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Benecke, J. "Impedance and Emission Optimization of Low-Voltage DC Motors for EMC Compliance." IEEE Transactions on Industrial Electronics 58, no. 9 (September 2011): 3833–39. http://dx.doi.org/10.1109/tie.2010.2084978.

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Kivanc, Omer, and Salih Ozturk. "Low-Cost Position Sensorless Speed Control of PMSM Drive Using Four-Switch Inverter." Energies 12, no. 4 (February 23, 2019): 741. http://dx.doi.org/10.3390/en12040741.

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A low-cost position sensorless speed control method for permanent magnet synchronous motors (PMSMs) is proposed using a space vector PWM based four-switch three-phase (FSTP) inverter. The stator feedforward d q -axes voltages are obtained for the position sensorless PMSM drive. The q-axis current controller output with a first order low-pass filter formulates the rotor speed estimation algorithm in a closed-loop fashion similar to PLL (Phase Lock Loop) and the output of the d-axis current controller acts as the derivative representation in the stator feedforward voltage equation. The proposed method is quite insensitive to multiple simultaneous parameter variations such as rotor flux linkage and stator resistance due to the dynamic effects of the PI current regulator outputs that are used in the stator feedforward voltages with a proper value of K gain in the q-axis stator voltage equation. The feasibility and effectiveness of the proposed position sensorless speed control scheme for the PMSM drive using an FSTP inverter are verified by simulation and experimental studies.

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Wang, Yi Fei, You Xin Yuan, and Yan Xu. "Research on a Novel Soft Starting Method of Super High-Power and High-Voltage Motor." Applied Mechanics and Materials 263-266 (December 2012): 604–9. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.604.

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The supper high-power and high-voltage motors are characterized by high staring current, low power factor and a large number of higher harmonic currents. Under different loads, the parameters such as the staring current, reactive power consumption, and harmonic current, are nonlinear, variable and coupling. Therefore, a novel soft starting method of super high-power and high-voltage motor is presented in this paper, to achieve quick and smooth motor starting; keep the power factor and the 5th harmonic current in permitted ranges. The following works have been done in the study: design the structure, analyze the principle and advance a cooperative control method of the system to integrate voltage-adjusting, current-limiting, dynamic compensation and harmonic filtering. The soft starter of super high-power and high-voltage motor developed with this method has been successfully applied to the fans load of 10kV, 21000kW, and got the better effect.

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Wang, Yi Wang, Bo Zhang, Feng Wen Cao, and Hui Pan. "FFU Motors Remote Monitoring System Based on Power Line Communication and GPRS." Advanced Materials Research 433-440 (January 2012): 5113–17. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.5113.

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In view of the advantage of low voltage power line carrier technique and general packet radio service(GPRS), a solution of fan filter unit(FFU) motor remote mointoring system based on GPRS and low voltage power line communication is introduced. This system combines a framework of low voltage power line communication and GPRS network with host computer monitoring center, which changes the traditional FFU motor control mode, and realize FFU motor remote real-time on-line automatic monitoring.The system implementation methods were described in detail, and the hardware and sofware design were given.The test and practice showed that the proposed has higher efficient and stronger anti-interference capability, which met the requirements of networkization and intelligentization, and a better way for the FFU motor control. The designed system has good application value.

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FLORKOWSKA, Barbara. "Experimental evaluation of breakdown voltage and life time for models of the low voltage electrical motors windings." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 10 (October 5, 2016): 23–27. http://dx.doi.org/10.15199/48.2016.10.05.

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Ozcelik, Nezih, and Emel Onal. "Partial discharge inception voltage change in low voltage electric motors Case study: high dc current excitation effect." Applied Researches in Technics, Technologies and Education 5, no. 3 (2017): 199–204. http://dx.doi.org/10.15547/artte.2017.03.007.

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Rao, S. Narasimha, and Elanseralathan Kasinathan. "Modeling of high frequency high voltage of waveforms on life of enamel insulation." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (September 1, 2021): 1331. http://dx.doi.org/10.11591/ijeecs.v23.i3.pp1331-1339.

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<p>In recent years it has been observed that insulation failure in electrical motors is caused by adjustable speed drives fed by power electronic converters. These converters produce impulse waveforms having a high slew rate generated by the high switching frequency of IGBTs. This paper focuses on high switching frequency stress in low voltage electrical motors for adjustable speeds. To examine the motor winding insulation under such stress twisted-pair samples were developed from enameled wires. A single-coated polyester of enamel with a thickness of 40 microns is used for this work. High-frequencies, high voltages of Square, and Square-rising, Square-spike waveforms of 10-30 kHz are used here. The test results show that the insulation fails earlier for the Square waveform compared to the Square-spike and Square-rising waveforms. In a nutshell, there is an analysis of PD formation in the insulation system at a higher switching frequency is analyzed. Electric field distributions between twisted pairs with various air gaps of the insulation system stressed by the Square and Square-rising waveforms up to 30 kHz are modeled using COMSOL software.</p>

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Pannila, Earl A. R. L., and Mahesh Edirisinghe. "Characterization of Switching Transients in Low Voltage Power Systems of Tea Factories in Sri Lanka." European Journal of Electrical Engineering 22, no. 4-5 (October 30, 2020): 325–34. http://dx.doi.org/10.18280/ejee.224-504.

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Voltage transients caused by various motors and electrical equipment of tea factories in Sri Lanka have been observed and analyzed. While reporting the major components of transients, this work extends it aspires to investigate the risk of having faults in a three-phase induction motor by monitoring and analyzing the transient voltage waveforms during the starting period. Therefore, common mode transient investigations have been followed. Transient voltage signals have been obtained from high end test setup and altogether 588 waveforms have been analyzed in both the time and frequency domains. In DOL and Star-Delta starting, highest transient amplitude of 688.2 V and 572.1 V have been observed respectively. Highest transient amplitude of 976.4 V and 980.5 V were observed in DOL and Star-Delta switching respectively. Withering and rolling sections dominates over other stages, generating high amplitude transients in average, reflecting same endangerment in energy calculations as presented in voltage integral. DOL starting transients carries fast rise times as 14 ns and in Star-Delta it is 28 ns. In order to assist with the exegesis of these data, transient parameters like rise time, duration, highest peak, etc.… have also been presented in statistical basis.

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Han, Tian Zhen, Qi Yang, Yun Ting Song, Xiao Jun Tang, Qing Kui Guo, Yong Yu Yuan, and Jian Jun Sun. "The Influence of Motor Low Voltage Trip on under-Frequency Load Shedding in the Electric Network of Refinery Enterprise." Advanced Materials Research 732-733 (August 2013): 1119–24. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.1119.

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A simple frequency response model is generally used in UFLS (under-frequency load shedding) design, without considering the impact of voltage on the frequency. In fact, in the case of large active and reactive shortage power, the system will suffer from the low voltage problem by the emergence of low frequency, which easily leads a large number of motors tripping due to low voltage protection trip in the UFLS process. The influence on UFLS is compared and problems needed to solve are put forward.

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Yan, Shao Bo, Yan Xu, and Zong Jiang Mu. "Differential Protection for High-Voltage Variable Frequency Motor Based on Sampled Values Algorithm." Applied Mechanics and Materials 373-375 (August 2013): 1401–5. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.1401.

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With the application of inverter in high-voltage motor, the traditional current differential protection cant be used because of the variable frequency. So it adopts low sensitive current instantaneous protection as main protection, which doesnt meet the security standard of grid state. In order to improve the sensitivity and reliability of high-voltage motor protection, a new method based on current sampled values is proposed in this paper, which adapts to the variable frequency system. After a brief description about the impact of inverter on main protection of motors, it introduces the principle of sampled value current differential protection and variable RS sampled value algorithm. A matlab example is used to simulate. On the whole, the simulation and analysis of the calculation results verify the feasibility and reasonableness of the method. Therefore, it provides a new approach for the protection of high-voltage motor in variable frequency system.

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Huang, Qilan, and Min Kang. "Model Predictive Current Control of Multiphase Motor at Low Carrier Ratio." Electronics 10, no. 5 (March 3, 2021): 591. http://dx.doi.org/10.3390/electronics10050591.

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Multiphase motors have multiple control planes, and harmonics are decoupled in different planes. Multiphase motors can improve magnetic field distribution, power density and core utilization by injecting certain harmonic currents into the harmonic planes. In the harmonic plane control process, due to the switching frequency of the inverter being limited, the ratio of the switching frequency to the current frequency (the carrier ratio) of the harmonic plane is low, the digital control delay increases, and the inverter output current contains more harmonics, which makes it difficult for the proportional-integral (PI) current controller to effectively control the d-axis and q-axis currents of the harmonic plane and thus unable to track the given values stably. Moreover, the PI current controller is relatively dependent on the motor parameters. For these reasons, a model predictive current control method with predictive error compensation is proposed. Taking a nine-phase induction motor as an example, the control voltage is calculated by the cost function and corrected by the current predictive error, which realizes the current control method at a low carrier ratio. Additionally, the robustness of the control method is analyzed after the parameters of the multiphase motor have large errors. The experimental results show that the proposed method can control the current of the harmonic plane at low carrier ratio, accurately track the harmonic current commands and attain strong robustness for the motor parameters.

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Nguyen, Manh, David Malec, Dominique Mary, Piotr Werynski, Barbara Gornicka, Laurent Therese, and Philippe Guillot. "Silica nanofilled varnish designed for electrical insulation of low voltage inverter-fed motors." IEEE Transactions on Dielectrics and Electrical Insulation 17, no. 5 (October 2010): 1349–56. http://dx.doi.org/10.1109/tdei.2010.5595535.

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Hassan, Waqar, Farhan Mahmood, Ghulam Amjad Hussain, and Salman Amin. "Risk assessment of low voltage motors based on PD measurements and insulation diagnostics." Measurement 176 (May 2021): 109151. http://dx.doi.org/10.1016/j.measurement.2021.109151.

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Okubo, Hitoshi, Naoki Hayakawa, and Gian Montanari. "Technical Development on Partial Discharge Measurement and Electrical Insulation Techniques for Low Voltage Motors Driven by Voltage Inverters." IEEE Transactions on Dielectrics and Electrical Insulation 14, no. 6 (December 2007): 1516–30. http://dx.doi.org/10.1109/tdei.2007.4401236.

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Journal articles on the topic 'Low voltage motors'

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