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Статті в журналах з теми "Motor Overvoltage"

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Автор: Grafiati

Опубліковано: 14 березня 2023

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1

Grigoriev, A. V., L. N. Tokarev, and D. A. Makarov. "Operation of propeller motors composed of ship electric propulsion systems with semiconductor converters." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012029. http://dx.doi.org/10.1088/1742-6596/2061/1/012029.

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Abstract The calculations of transient processes in ship electric propulsion systems (EPS) with semiconductor converters (SC) show that when the inverter transistors are locked, overvoltage occurs that may break through the insulation of propeller motors (PM). A feature of this overvoltage is its short duration and large value. Pulsed overvoltage of small duration and the EPS value of dozens or more kilovolts may occur in the circuits of the inverter supplying the PM winding. The main cause of overvoltage is the EPS self-induction resulting from rapid current reduction in circuits with inductances, including in motor windings, when the inverter transistors are locked. The paper presents the results of mathematical modeling of the processes arising when the inverter transistors functioning as part of the frequency converter are locked. The results of the analysis confirmed the possibility of overvoltage on the PM winding, which should be taken into account when designing the EPS and selecting equipment.

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2

Barzkar, Ashkan, and Mona Ghassemi. "Precise Evaluation of Repetitive Transient Overvoltages in Motor Windings in Wide-Bandgap Drive Systems." Vehicles 4, no. 3 (July 19, 2022): 697–726. http://dx.doi.org/10.3390/vehicles4030040.

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The increasing interest in employing wide-bandgap (WBG) drive systems has brought about very high power, high-frequency inverters enjoying switching frequencies up to hundreds of kilohertz. However, voltage surges with steep fronts, caused by turning semiconductor switches on/off in inverters, travel through the cable and are reflected at interfaces due to impedance mismatches, giving rise to overvoltages at motor terminals and in motor windings. The phenomena typically associated with these repetitive overvoltages are partial discharges and heating in the insulation system, both of which contribute to insulation system degradation and may lead to premature failures. In this article, taking the mentioned challenges into account, the repetitive transient overvoltage phenomenon in WBG drive systems is evaluated at motor terminals and in motor windings by implementing a precise multiconductor transmission line (MCTL) model in the time domain considering skin and proximity effects. In this regard, first, a finite element method (FEM) analysis is conducted in COMSOL Multiphysics to calculate parasitic elements of the motor; next, the vector fitting approach is employed to properly account for the frequency dependency of calculated elements, and, finally, the model is developed in EMTP-RV to assess the transient overvoltages at motor terminals and in motor windings. As shown, the harshest situation occurs in turns closer to motor terminals and/or turns closer to the neutral point depending on whether the neutral point is grounded or floating, how different phases are connected, and how motor phases are excited by pulse width modulation (PWM) voltages.

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3

D’Amato, Davide, Jelena Loncarski, Vito Giuseppe Monopoli, Francesco Cupertino, Luigi Pio Di Noia, and Andrea Del Pizzo. "Impact of PWM Voltage Waveforms in High-Speed Drives: A Survey on High-Frequency Motor Models and Partial Discharge Phenomenon." Energies 15, no. 4 (February 15, 2022): 1406. http://dx.doi.org/10.3390/en15041406.

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The insulation system’s dielectric of the electric motor is very often subjected to severe electrical stress generated by the high dv/dt seen at the machine’s terminals. The electrical stress and high reflected wave transient overvoltage are even more evident in case of high-speed machines fed by high-frequency (HF) converters featuring very fast wide-bandgap devices. They are promoting the occurrence of partial discharges and consequently accelerate ageing. As this is serious issue and the main cause of the drive failure, it is important to analyse and characterise the surges at the motor terminals. Several HF models of motors have been proposed in the literature for this purpose. This article presents a survey on HF motor models, which is crucial in understanding and studying the most critical parameter identification and overvoltage mitigation techniques. Moreover, it offers a comparison of the models’ main features as well as a comparison with the experimental voltage waveform at motor terminals. A general overview of the partial discharge (PD) phenomenon is also provided, as it is favoured by HF operation and together with HF motor modelling provides key insights to the insulation ageing issue. In particular, an analysis of the effects of PWM waveform affecting insulation is given, as well as useful methods for developing strategies for the inspection and maintenance of winding insulation.

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4

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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5

Deng, Yonghong, and Quanzhu Zhang. "Resonance overvoltage control algorithms in long cable frequency conversion drive based on discrete mathematics." Open Physics 18, no. 1 (August 3, 2020): 408–18. http://dx.doi.org/10.1515/phys-2020-0120.

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AbstractIn order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance overvoltage control algorithm of the long cable VVVF system based on discrete mathematics is studied. First, the long cable frequency conversion drive system is established. In order to ensure voltage loss in the range of motor requirements, a frequency converter–cable–motor (ICM) system connection mode is used to maintain the system operation. Based on the research of the capacitor voltage balance control strategy of a long cable frequency conversion drive system, the discrete mathematical model of the AC side of the ICM system is established by using this control strategy. The improved constant active power controller is obtained by establishing the mathematical model, and the resonant overvoltage in a long cable frequency conversion drive is realized by using the constant active power controller. The experimental results show that the algorithm can effectively control the resonance overvoltage phenomenon in the long cable frequency control system, and the control accuracy is over 97%. It has good performance and can be applied in practice.

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6

Taghia, Bouazza, Bernardo Cougo, Hubert Piquet, David Malec, Antoine Belinger, and Jean-Pierre Carayon. "Overvoltage at motor terminals in SiC-based PWM drives." Mathematics and Computers in Simulation 158 (April 2019): 264–80. http://dx.doi.org/10.1016/j.matcom.2018.09.009.

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7

Hanigovszki, N., J. Poulsen, and F. Blaabjerg. "A Novel Output Filter Topology to Reduce Motor Overvoltage." IEEE Transactions on Industry Applications 40, no. 3 (May 2004): 845–52. http://dx.doi.org/10.1109/tia.2004.827803.

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8

Loncarski, Jelena, Vito Giuseppe Monopoli, Riccardo Leuzzi, Leposava Ristic, and Francesco Cupertino. "Analytical and Simulation Fair Comparison of Three Level Si IGBT Based NPC Topologies and Two Level SiC MOSFET Based Topology for High Speed Drives." Energies 12, no. 23 (November 30, 2019): 4571. http://dx.doi.org/10.3390/en12234571.

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Wide bandgap (WBG) power devices such as silicon carbide (SiC) can viably supply high speed electrical drives, due to their capability to increase efficiency and reduce the size of the power converters. On the other hand, high frequency operation of the SiC devices emphasizes the effect of parasitics, which generates reflected wave transient overvoltage on motor terminals, reducing the life time and the reliability of electric drives. In this paper, a SiC metal-oxide-semiconductor field-effect transistor (MOSFET) based two level (2L) inverter is systematically studied and compared to the performance of Si insulated-gate bipolar transistor (IGBT) based three level (3L) neutral point clamped (NPC) inverter topologies, for high speed AC motor loads, in terms of efficiency, overvoltages, heat sink design, and cost. A fair comparison was introduced for the first time, having the same output voltage capabilities, output current total harmonic distortion (THD), and overvoltages for the three systems. The analysis indicated the convenience of using the SiC MOSFET based 2L inverter for lower output power. In the case of the maximum output power, the heat sink volume was found to be 20% higher for the 2L SiC based inverter when compared to 3L NPC topologies. Simulations were carried out by realistic dynamic models of power switch modules obtained from the manufacturer’s experimental tests and verified both in the LTspice and PLECS simulation packages.

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9

Wang, Zheng Hao, Zhong Li Yang, Zhi Liang Yu, and Xue Fan Zheng. "Intelligent and Compositive Protector for Motor Based on AVR Single-Chip Microcomputer." Applied Mechanics and Materials 462-463 (November 2013): 672–77. http://dx.doi.org/10.4028/www.scientific.net/amm.462-463.672.

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A kind of intelligent and compositive motor protector designed by ATMEGA16 single-chip microcomputer was introduced. The product, which has a set of high precision, high sensitivity and reliability, has many functions, such as overload or lightload protection, phase loss, overvoltage or lightvoltage, short circuit, locked rotor, leakage and phase imbalance protection. This product is a perfect substitute to the traditional motor protection devices, which has a good cost performance and broad market prospects.

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10

Darmawansyah, Darmawansyah, M. Khairul Amri Rosa, and Ika Novia Anggraini. "Sistem Proteksi Motor Induksi 3 Fasa Terhadap Bermacam Gangguan Menggunakan Mikrokontroller." JURNAL AMPLIFIER : JURNAL ILMIAH BIDANG TEKNIK ELEKTRO DAN KOMPUTER 10, no. 1 (May 30, 2020): 9–17. http://dx.doi.org/10.33369/jamplifier.v10i1.15168.

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ABSTRACTIn the current era of globalization, various human jobs depend on electrical equipment such as three-phase induction motors. Three-phase induction motors are very important to use according to their roles and functions. The occurrence of voltage variations in the electric power system is due to the magnitude of the voltages between the three phases which are not the same so that there are differences in the angle of the R, S and T phases, which causes an uneven load overload in the electrical distribution system. Among the disturbances that can occur are overvoltage, under voltage, unbalance voltage between phases, overload, and overheating. Based on these problems, a three-phase induction motor protection system was designed, the system uses current, voltage, temperature sensors, which functions to measure the value when a disturbance occurs, a magnetic contactor as a breaker and a liaison when the disturbance is given in accordance with the set point value given to the microcontroller. The results of the research for unbalanced voltage of V1 112 V, V2 114 V, V3 108 V, overvoltage of V1 228 V, V2 207 V, V3 264 V, over current of A1 104 A, A2 107 A, A3 0.77 A , the overload on the resistance source is 333 ?, 250 ?, 200 ?, 167 ?, and the overheating is 40.75 ºC at 6.5 minutes with tripping conditions in each test. The final results of this study indicate that the protection system which is designed is better used for three-phase induction motors.Keywords: unbalaced, disturbances, protection systems, sensors, magnetic contactor, microcontroller.

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11

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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12

Korhonen, J., T. Itkonen, J. P. Ström, J. Tyster, and P. T. Silventoinen. "Active motor terminal overvoltage mitigation method for parallel voltage source inverters." IET Power Electronics 5, no. 8 (2012): 1430. http://dx.doi.org/10.1049/iet-pel.2011.0232.

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13

Gao, Yinhan, Zhanyang An, Juxian Wang, Changying Liu, and Tianhao Wang. "Overvoltage Analysis of PWM Inverter Fed Induction Food Motor with Long Cable." Advance Journal of Food Science and Technology 10, no. 7 (March 5, 2016): 508–13. http://dx.doi.org/10.19026/ajfst.10.2174.

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14

Dantas, Amanda Danielle O. da S., André Felipe O. de A. Dantas, João Tiago L. S. Campos, Domingos L. de Almeida Neto, and Carlos Eduardo T. Dórea. "PID Control for Electric Vehicles Subject to Control and Speed Signal Constraints." Journal of Control Science and Engineering 2018 (August 1, 2018): 1–11. http://dx.doi.org/10.1155/2018/6259049.

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A PID control for electric vehicles subject to input armature voltage and angular velocity signal constraints is proposed. A PID controller for a vehicle DC motor with a separately excited field winding considering the field current constant was tuned using controlled invariant set and multiparametric programming concepts to consider the physical motor constraints as angular velocity and input armature voltage. Additionally, the integral of the error, derivative of the error constraints, and λ were considered in the proposed algorithm as tuning parameters to analyze the DC motor dynamic behaviors. The results showed that the proposed algorithm can be used to generate control actions taking into account the armature voltage and angular velocity limits. Also, results demonstrate that a controller subject to constraints can improve the electric vehicle DC motor dynamic; and at the same time it protects the motor from overvoltage.

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15

Liu, Benchao. "Modeling and Simulation of Single Battery Load Isolated Electric Vehicle Based on Simulink." Journal of Physics: Conference Series 2068, no. 1 (October 1, 2021): 012029. http://dx.doi.org/10.1088/1742-6596/2068/1/012029.

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Abstract The load isolation electric vehicle improves the range of electric vehicle, which separates the concept of power and energy, so that the engine can always work in the most economical operating area. Based on Simulink, a single battery load isolation electric vehicle model is established for a mini car. According to the requirements of vehicle performance indexes, the parameters of vehicle system model, gasoline generator set, battery pack and motor model were matched. In the process of accelerating the average speed to the set maximum speed, the battery voltage curve and the motor output power are analyzed. The analysis shows that the battery has no overvoltage danger and the motor does not exceed the peak power, thus verifying the feasibility and superiority of the model.

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16

Aoki, N., K. Satoh, and A. Nabae. "Damping circuit to suppress motor terminal overvoltage and ringing in PWM inverter-fed AC motor drive systems with long motor leads." IEEE Transactions on Industry Applications 35, no. 5 (1999): 1014–20. http://dx.doi.org/10.1109/28.793361.

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17

Himeno, Takashi, Yukio Okamura, Minoru Asada, and Toshihiro Nakamura. "Overvoltage Phenomena Caused by Disconnecting Motor-Loads on Power Line with Open-Phase." IEEJ Transactions on Power and Energy 113, no. 6 (1993): 653–58. http://dx.doi.org/10.1541/ieejpes1990.113.6_653.

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18

De Caro, Salvatore, Salvatore Foti, Tommaso Scimone, Antonio Testa, Giacomo Scelba, Mario Pulvirenti, and Sebastiano Russo. "Motor Overvoltage Mitigation on SiC MOSFET Drives Exploiting an Open-End Winding Configuration." IEEE Transactions on Power Electronics 34, no. 11 (November 2019): 11128–38. http://dx.doi.org/10.1109/tpel.2019.2902254.

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19

Himeno, Takashi, Yukio Okamura, Minoru Asada, and Toshihiro Nakamura. "Overvoltage phenomena caused by disconnecting motor-loads on power line with open-phase." Electrical Engineering in Japan 114, no. 3 (1994): 114–22. http://dx.doi.org/10.1002/eej.4391140310.

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20

Himeno, Takashi, Yukio Okamura, Minoru Asada, and Toshihiro Nakamura. "Overvoltage phenomena caused by disconnecting motor-loads on power lines with open-phase." Electrical Engineering in Japan 120, no. 4 (September 1997): 59–65. http://dx.doi.org/10.1002/(sici)1520-6416(199709)120:4<59::aid-eej8>3.0.co;2-o.

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21

Ruffo, Riccardo, Paolo Guglielmi, and Eric Armando. "Inverter Side RL Filter Precise Design for Motor Overvoltage Mitigation in SiC-Based Drives." IEEE Transactions on Industrial Electronics 67, no. 2 (February 2020): 863–73. http://dx.doi.org/10.1109/tie.2019.2898623.

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22

Moreira, A. F., T. A. Lipo, G. Venkataramanan, and S. Bernet. "High-frequency modeling for cable and induction motor overvoltage studies in long cable drives." IEEE Transactions on Industry Applications 38, no. 5 (September 2002): 1297–306. http://dx.doi.org/10.1109/tia.2002.802920.

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23

Turzyński, M., P. Banach, P. Murawski, R. Pepliński, and P. J. Chrzan. "A predictive estimation based control strategy for a quasi-resonant dc-link inverter." Bulletin of the Polish Academy of Sciences: Technical Sciences 61, no. 4 (December 1, 2013): 757–62. http://dx.doi.org/10.2478/bpasts-2013-0081.

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Abstract Control of parallel quasi resonant dc link inverters (PQRDCLI) is usually based on dc link input inverter current. Instead of a direct measurement of this noise sensitive and fast changing current signal - its estimation with one step prediction may be considered. Estimation of an input inverter current is based on inverter output current measurements, applied in most of power electronics controlled ac drives. In this paper, the PQRDCLI fed induction motor (IM) with a predictive current estimation stabilizes resonant inverter output voltage slopes du/dt independently of load. By control of output voltage derivatives, reduction of overvoltage spikes and common mode motor currents is achieved. An analysis of the PQRDCLI control with a predictive current estimation strategy is verified by the Saber system simulation and experimental tests in a laboratory setup.

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24

Yuen, Ken Kuen-Faat, Henry Shu-Hung Chung, and Victor Sui-Pung Cheung. "An Active Low-Loss Motor Terminal Filter for Overvoltage Suppression and Common-Mode Current Reduction." IEEE Transactions on Power Electronics 27, no. 7 (July 2012): 3158–72. http://dx.doi.org/10.1109/tpel.2011.2178865.

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25

KHALED, Ben Smida, Ben smida MONCEF, and Mrabet BRAHIME. "Diffusive representation modelling thermal and overvoltage for permanent magnet synchronous motor fed by voltage inverter." TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES 27, no. 5 (September 18, 2019): 3951–66. http://dx.doi.org/10.3906/elk-1811-183.

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26

Huangfu, Youpeng, Song Wang, Shuang Wang, Hailin Li, Dongsheng Yuan, Shuhong Wang, and Luca Di Rienzo. "Macro-modeling and passivity enforcement for PMSM winding." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 6 (November 6, 2017): 1729–38. http://dx.doi.org/10.1108/compel-12-2016-0572.

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Purpose The purpose of this paper is to implement the macro-modeling and passivity enforcement for the equivalent high frequency circuit model of a single-phase winding for an alternating current (AC) three-phase motor. It provides a stable and strictly passive Foster-type circuit macro-model for the winding. Consequently, a stable circuit network is guaranteed when it is connected with an external passive circuit. The equivalent circuit is validated on a three-phase permanent magnet synchronous motor. Furthermore, the corresponding three-phase windings macro-model could be obtained accordingly. Design/methodology/approach The following techniques are used: the least square method, vector fitting method, the fast residue perturbation method, circuit synthesis, sequence quadratic programming method and simulated annealing method. Findings This work presents an effective approach to model an equivalent high frequency circuit macro-model for a single-phase winding. Simultaneously, both the characteristics of port passivity and component passivity are guaranteed. Originality/value This paper carries out both the port passivity and the component passivity enforcement for a single-phase winding of a motor during the macro-modeling procedure. This equivalent motor winding model can be applied to obtain the conducted electromagnetic interference and the overvoltage performance analysis for an adjustable speed motor drive system.

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27

Qin, Kaina, Shanshan Wang, and Zhongjian Kang. "Research on Zero-Voltage Ride Through Control Strategy of Doubly Fed Wind Turbine." Energies 14, no. 8 (April 19, 2021): 2287. http://dx.doi.org/10.3390/en14082287.

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With the rapid increase in the proportion of the installed wind power capacity in the total grid capacity, the state has put forward higher and higher requirements for wind power integration into the grid, among which the most difficult requirement is the zero-voltage ride through (ZVRT) capability of the wind turbine. When the voltage drops deeply, a series of transient processes, such as serious overvoltage, overcurrent, or speed rise, will occur in the motor, which will seriously endanger the safe operation of the wind turbine itself and its control system, and cause large-scale off-grid accident of wind generator. Therefore, it is of great significance to improve the uninterrupted operation ability of the wind turbine. Doubly fed induction generator (DFIG) can achieve the best wind energy tracking control in a wide range of wind speed and has the advantage of flexible power regulation. It is widely used at present, but it is sensitive to the grid voltage. In the current study, the DFIG is taken as the research object. The transient process of the DFIG during a fault is analyzed in detail. The mechanism of the rotor overcurrent and DC bus overvoltage of the DFIG during fault is studied. Additionally, the simulation model is built in DIgSILENT. The active crowbar hardware protection circuit is put into the rotor side of the wind turbine, and the extended state observer and terminal sliding mode control are added to the grid side converter control. Through the cooperative control technology, the rotor overcurrent and DC bus overvoltage can be suppressed to realize the zero-voltage ride-through of the doubly fed wind turbine, and ensure the safe and stable operation of the wind farm. Finally, the simulation results are presented to verify the theoretical analysis and the proposed control strategy.

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28

Matsumura, Itaru, and Hirofumi Akagi. "Modeling and Filter Design for Overvoltage Mitigation in a Motor Drive System with a Long Cable." IEEJ Transactions on Industry Applications 129, no. 8 (2009): 844–51. http://dx.doi.org/10.1541/ieejias.129.844.

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29

Videt, A., P. Le Moigne, N. Idir, P. Baudesson, J. J. Franchaud, and J. Ecrabey. "Motor Overvoltage Limitation by Means of a New EMI-Reducing PWM Strategy for Three-Level Inverters." IEEE Transactions on Industry Applications 45, no. 5 (2009): 1678–87. http://dx.doi.org/10.1109/tia.2009.2027517.

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30

Parreiras, Thiago Morais, Brenno Marcus Pereira do Prado, and Braz de J. Cardoso Filho. "Common-Mode Overvoltage Mitigation in a Medium-Voltage Pump Motor Transformerless Drive in a Mining Plant." IEEE Transactions on Industry Applications 54, no. 1 (January 2018): 848–57. http://dx.doi.org/10.1109/tia.2017.2750098.

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31

Diab, Mohamed S., and Xibo Yuan. "A Quasi-Three-Level PWM Scheme to Combat Motor Overvoltage in SiC-Based Single-Phase Drives." IEEE Transactions on Power Electronics 35, no. 12 (December 2020): 12639–45. http://dx.doi.org/10.1109/tpel.2020.2994289.

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32

Qin, Haihong, Haoxiang Hu, Feifei Bu, Qian Xun, Wenming Chen, and Dafeng Fu. "Design of overvoltage suppression filter based on high-frequency modeling of cable in SiC based motor drive." Energy Reports 8 (November 2022): 822–31. http://dx.doi.org/10.1016/j.egyr.2022.08.025.

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33

Zhou, Wenzhi, Mohamed Diab, and Xibo Yuan. "Impact of Parasitic and Load Current on the Attenuation of Motor Terminal Overvoltage in SiC-Based Drives." IEEE Transactions on Industry Applications 58, no. 2 (March 2022): 2229–41. http://dx.doi.org/10.1109/tia.2022.3141703.

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34

Ortega, R., A. de Rinaldis, M. W. Spong, S. Lee, and K. Nam. "On Compensation of Wave Reflections in Transmission Lines and Applications to the Overvoltage Problem AC Motor Drives." IEEE Transactions on Automatic Control 49, no. 10 (October 2004): 1757–62. http://dx.doi.org/10.1109/tac.2004.835405.

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35

Anwari, Makbul, and Ayong Hiendro. "New Unbalance Factor for Estimating Performance of a Three-Phase Induction Motor With Under- and Overvoltage Unbalance." IEEE Transactions on Energy Conversion 25, no. 3 (September 2010): 619–25. http://dx.doi.org/10.1109/tec.2010.2051548.

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36

Zhang, Liao, Chao Gong, and Jinglin Liu. "Uncontrolled Generation Analysis and System Optimization of Permanent Magnet Synchronous Motor for Electric Vehicle." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 37, no. 2 (April 2019): 258–65. http://dx.doi.org/10.1051/jnwpu/20193720258.

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Анотація:

When a permanent magnet synchronous motor(PMSM) which is controlled by flux-weakening strategy rotates in high speed, the controller would send the turning-off signals to switch off all the transistors quickly if faults(e.g. overvoltage and overcurrent) occur. At this moment, the equivalent electromotive force is higher than battery voltage due to the high speed of motor, so the current flows into the battery through the uncontrolled rectifier bridge composed of six freewheeling diodes, resulting in the drive system works at the status of uncontrolled generation(UCG). Firstly, the mathematical model of the system is established. Then, according to the theoretical analysis, the UCG process is divided into three stages: transistors turning-off stage, diodes freewheeling and turning-on stage and steady-state UCG stage. It is found that the steady-state UCG process has the shortcomings of large current and long time. Therefore, an optimal protection scheme based on fuzzy control is proposed, which can reduce danger damage of UCG. Finally, simulation and experiment are adopted to study the process of UCG, and the effectiveness of the optimization strategy is verified.

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37

Casadei, Domenico, Michele Mengoni, Giovanni Serra, Angelo Tani, and Luca Zarri. "A Control Scheme With Energy Saving and DC-Link Overvoltage Rejection for Induction Motor Drives of Electric Vehicles." IEEE Transactions on Industry Applications 46, no. 4 (July 2010): 1436–46. http://dx.doi.org/10.1109/tia.2010.2049627.

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38

Tallam, Rangarajan M., and David Leggate. "Control of a PWM Voltage-Source Inverter in the Pulse-Dropping Region to Reduce Reflected-Wave Motor Overvoltage." IEEE Transactions on Industry Applications 49, no. 2 (March 2013): 873–79. http://dx.doi.org/10.1109/tia.2012.2228613.

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39

Ma, Tianxiang, Xin Duan, Zhiyuan Zhang, Hongliang Shen, Yan Xu, and Nan Zou. "Single-phase disconnection fault location of active distribution network based on negative-sequence differential impedance." Journal of Physics: Conference Series 2290, no. 1 (June 1, 2022): 012010. http://dx.doi.org/10.1088/1742-6596/2290/1/012010.

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Анотація:

Abstract Accidents such as overvoltage, personal injury and motor damage caused by singlephase disconnection faults occur frequently in active distribution networks. In response to this problem, firstly, the negative-sequence differential impedance is defined and a protection method based on negative-sequence differential impedance is proposed, the method uses the amplitude of negative-sequence differential impedance as an action quantity and uses its phase to construct an adaptive braking threshold. Secondly, in case of protection failure under overload, the zero-sequence voltage amplitude difference is proposed as an auxiliary criterion, and the influence of different types of distributed generators on the zero-sequence voltage difference on both sides of the fault fracture is analyzed. Finally, it is verified by simulation that the method can be positioned reliably and is not affected by the neutral point grounding method, transition resistance, load and distributed generators.

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40

Yuen, Ken Kuen-Faat, and Henry Shu-Hung Chung. "A Low-Loss “RL-Plus-C” Filter for Overvoltage Suppression in Inverter-Fed Drive System With Long Motor Cable." IEEE Transactions on Power Electronics 30, no. 4 (April 2015): 2167–81. http://dx.doi.org/10.1109/tpel.2014.2325824.

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41

Wang, Liwei, Carl Ngai-Man Ho, Francisco Canales, and Juri Jatskevich. "High-Frequency Modeling of the Long-Cable-Fed Induction Motor Drive System Using TLM Approach for Predicting Overvoltage Transients." IEEE Transactions on Power Electronics 25, no. 10 (October 2010): 2653–64. http://dx.doi.org/10.1109/tpel.2010.2047027.

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42

Sangcheol Lee and Kwanghee Nam. "An overvoltage suppression scheme for AC motor drives using a half DC-link voltage level at each PWM transition." IEEE Transactions on Industrial Electronics 49, no. 3 (June 2002): 549–57. http://dx.doi.org/10.1109/tie.2002.1005379.

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43

Miloudi, H., M. Miloudi, A. Gourbi, M. H. Bermaki, A. Bendaoud, and A. Zeghoudi. "A high-frequency modeling of AC motor in a frequency range from 40 Hz to 110 MHz." Electrical Engineering & Electromechanics, no. 6 (November 7, 2022): 3–7. http://dx.doi.org/10.20998/2074-272x.2022.6.01.

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Introduction. Most electromagnetic compatibility models developed for the study of three-phase induction machines are generally valid for low and medium frequencies (<< 1 MHz). This frequency limit seems to be too restrictive for the overall study of conducted electromagnetic interference. In this paper, the model is using the proposed model and compared with experimental results in low and medium frequency. And then, the high-frequency modeling of induction motor is presented new method based on transfer function model. The proposed methodology is verified on an experimental and simulation, it’s suitable for prediction of the terminal overvoltage analysis and electromagnetic interference problems and common-mode and differential-mode currents. The novelty of the work consists to develop an improved high-frequency motor model based on transfer function to represent the motor high-frequency behavior for frequency-domain analyses in the frequency range from 40 Hz up to 110 MHz .The purpose of this work is to study the common-mode impedance and the differential-mode impedance of AC motor. The determination of these impedances is done for firstly both common and differential modes at low and medium frequency, and then common-mode and differential-mode characteristics at high frequency. Methods. For the study of the path of common-mode and differential-mode currents in typical AC motor (0.25 kW, 50 Hz) an identification method in high frequency for induction motor has been proposed based on the transfer function in differential-mode and common-mode configuration. The low and medium frequency model were presented in the first time based on equivalent circuit of electrical motor. Then, the common-mode and differential-mode impedances were defined in high frequency using asymptotic approach. This motor was studied by MATLAB Software for simulation and also experimental measurements. Results. All the simulations were performed using the mathematical model and the results obtained are validated by experimental measurements performed in the University of the Federal Armed Forces Hamburg in Germany. The obtained results of common-mode and differential-mode at low frequency, medium and high frequency are compared between simulation and experiment.

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44

Wang, Xu, and Zou. "Sliding-Mode-Observer-Based Open-Switch Diagnostic Method for Permanent Magnet Synchronous Motor Drive Connected with LC Filter." Energies 12, no. 17 (August 26, 2019): 3288. http://dx.doi.org/10.3390/en12173288.

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Анотація:

At present, pulse width modulation (PWM) technique is widely applied in motor drive systems. However, it may cause some unexpected effects: Bearing currents, overvoltage, power losses and unwanted noise. In some industrial cases, LC filters are always equipped in motor drive systems to suppress those unexpected effects. In order to improve the reliability and safety of the drive system, fault diagnostic strategies for power switches should be utilized as other drive systems without LC filters. In the literature, some open-switch diagnostic approaches are based on the observers derived from the mathematical models. However, the models are changed by the LC filters. Therefore, the existing approaches, based on the observers are failed, due to the change of the models. This study proposes an open-switch diagnostic method for permanent magnet synchronous motor (PMSM) drive equipped with LC Filter. The novelty of the proposed method is that the model of the LC filter is considered. Therefore, open-switch faults can be detected and located in the drive systems with LC filters. The switching function model of the drive system is analyzed at first. Then a sliding mode observer (SMO) considering the model of the filter is proposed to estimate the filter voltages and other state variables. Consequently, the faults can be detected and located through the residual errors between the expected and estimated filter voltages. This approach features simplicity. Furthermore, any extra sensors are not necessary. Experimental results on a 750-W PMSM drive system with an LC filter proved the feasibility of the proposed method.

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45

Melnykov, V. "DESIGN OF THE POWER TRANSISTOR ENERGY CONVERTERS FOR AUTOMATED DC-DRIVE SYSTEMS." Electromechanical and energy saving systems 2, no. 53 (2021): 31–39. http://dx.doi.org/10.30929/2072-2052.2021.2.54.31-39.

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Purpose. One of the integral parts of modern mechatronic motion modules, where electric motors provide the conversion of electrical energy into useful mechanical action, are power semiconductor converters. At the current stage of industrial development, the use of energy converters as a part of a fully controlled semiconductor switches opens wide opportunities for the development and implementation of highly efficient resource- and energy-saving devices. Methodology. Two types of converters are widely used in automated DC electric drive systems: controlled thyristor rectifiers and pulse-width DC converters, the principle of operation of which is based on the key mode of operation of the regulating semiconductor, which periodically connects the source voltage to the output circuit. The paper presents a laboratory sample of a power semiconductor DC energy converter, which can ensure reliable motor operation in both motor and braking modes. Results. The presented transistor energy converter consists of two main parts: the first part performs the main role – control, and it includes a control unit, a microcontroller, and a device for displaying current information. The second part is a power module, which includes the necessary power supply modules, control drivers and power transistor switches of the converter. To obtain high quality transients of the electric drive system, the circuit is equipped with additional sensors of current, voltage and speed, which takes part in the formation of the control signal and in the protection systems against overvoltage and current jumps. Practical value. The paper substantiates the parameters of the components and proposes developed technical solutions for the construction of a microprocessor control system for a transistor DC energy converter. It is shown that in order to ensure a constant generator mode in automated electric drive systems, where the primary energy converter is an uncontrolled rectifier, it is expedient to install an energy discharge circuit in the DC link. References 18, figures 14.

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46

Park, Byungju, Jaehyeong Lee, Hangkyu Yoo, and Gilsoo Jang. "Harmonic Mitigation Using Passive Harmonic Filters: Case Study in a Steel Mill Power System." Energies 14, no. 8 (April 18, 2021): 2278. http://dx.doi.org/10.3390/en14082278.

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In this study, we mitigated the harmonic voltage in a power system that contained the roughing mill (RM) and finishing mill (FM) motor drives. AC/DC converter type RM drive is a non-linear, large-capacity varying load that adversely affects power quality, e.g., a flicker, voltage distortion, etc. The voltage drop can be compensated within a certain limit by using the proper capacity of a power capacitor bank. In addition, the voltage distortion can be controlled as per the guidelines of IEEE Std. 519 using the passive harmonic filter corresponding to the characteristic harmonics of the motor drive load. The passive harmonic filter can provide an economical solution by mitigating the harmonic distortion with a proper reactive power supply. However, at the planning level, attention should be paid to avoid system overvoltage that is caused by the leading power under light load conditions and also the problem of parallel resonance between the harmonic filter and the step-down transformer. In addition, when designing the filter reactor, the K-factor and peak voltage must be considered; the filter capacitor also requires a dielectric material that considers the harmonic peak voltage. The purpose of this study was to acquire a better understanding of the filter applications as well as verify the field measurement, analysis, and design of harmonic filters together with its performance.

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47

Duan, Y., J. Jiang, J. Li, L. Li, S. Li, D. Liu, J. Liu, et al. "Scintillator tile batch test of CEPC AHCAL." Journal of Instrumentation 17, no. 05 (May 1, 2022): P05006. http://dx.doi.org/10.1088/1748-0221/17/05/p05006.

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Abstract Hadron calorimeter (HCAL) is an essential sub-detector of the baseline detector system for Circular Electron Positron Collider (CEPC). We plan to build an Analog Hadron CALorimeter (AHCAL) prototype based on the Particle Flow Algorithm (PFA). The AHCAL of CEPC uses steel as the absorber and scintillator tiles read out by Silicon Photo-Multipliers (SiPMs) as the sensitive medium. The energy linearity and resolution of the calorimeter depend on the light yield uniformity of the sensitive medium. It is essential to qualify the entire detector production in order to select scintillator tiles with the uniformity of light yield within 10%. An automated batch test platform has been designed with 144 channels and an automated 3D servo motor. The paper summarizes the tests performed on more than 15000 scintillator tiles, and the SiPMs work at 59 V (overvoltage: 5 V). The measured light yield, corrected for the set-up response non-uniformity, is around 12.9 p.e. About 91.6% of scintillators (14219 pieces) are qualified within 10% of the light yield window.

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48

PLATONOVA, Yana V. "Peculiarities of working conditions in the formation of professional health of teachers." Medicine and Physical Education: Science and Practice, no. 5 (2020): 54–61. http://dx.doi.org/10.20310/2658-7688-2020-2-1(5)-54-61.

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We presented the analysis of the working conditions of teachers, from which it becomes clear that low indicators of health and professional self-awareness characterize the modern teacher. The negative consequences of professional activity in school include the emergence of overvoltage of the nervous system, leading to internal emotional devastation and the development of “emotional combustion” syndrome among teachers; development of hypodynamics leading to disorders in the musculoskeletal system and cardiovascular system; overwork and problems with vision, speech apparatus, gastrointestinal tract, respiratory system. Among the leading factors of the occurrence of the listed diseases, teachers refer to the tension of professional activity, insufficient motor activity, low level of material support, absence of a system of social support for pedagogical personnel. The preservation, strengthening and restoration of the professional health of the teacher should be based on self-preservation behaviour and healthy lifestyle of the members of the profession. We assumed that the formation of a system of knowledge and skills related to professional safety, health protection, prevention of certain diseases of teachers should be laid down during the period of study at the university, including in the process of introducing digital technologies into the physical education of students.

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49

Kwon, Young-Mok, and Jae-Chul Kim. "Analysis on the Effect of Filter to Mitigate Transient Overvoltage on the High Voltage Induction Motor Fed by Multi Level Inverter using EMTP." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 20, no. 10 (December 31, 2006): 82–93. http://dx.doi.org/10.5207/jieie.2006.20.10.082.

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50

Jiang, Yanmin, Weimin Wu, Yuanbin He, Henry Shu-Hung Chung, and Frede Blaabjerg. "New Passive Filter Design Method for Overvoltage Suppression and Bearing Currents Mitigation in a Long Cable Based PWM Inverter-Fed Motor Drive System." IEEE Transactions on Power Electronics 32, no. 10 (October 2017): 7882–93. http://dx.doi.org/10.1109/tpel.2016.2639024.

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