Journal articles: 'VARIABLE-SPEED MOTOR'

1

Henze, Michael. "The Integral Motor — A new variable-speed motor drive." World Pumps 1996, no. 358 (July 1996): 54–57. http://dx.doi.org/10.1016/s0262-1762(99)80683-x.

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Peng, Tian Hao, and Teng Ma. "Speed Loss Compensation Simulation Analysis on Variable-Speed Pump-Control-Motor System." Applied Mechanics and Materials 385-386 (August 2013): 896–900. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.896.

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This paper analyses the reasons of motor speed loss on variable-speed pump-control-motor governing system, and points out that the reasons are system leakage, electromotor characteristics and oil compressibility caused by system pressure change. Speed loss compensation method of variable-speed pump-control-motor governing system is put forward. Simulation analysis is carried out under constant load, variable load and variable-speed, and simulation results show that the compensation method can well compensate motor speed loss.

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Strelkov, V. F., M. V. Andryushin, and V. V. Vanyev. "Power antenna radar with variable speed." Journal of «Almaz – Antey» Air and Space Defence Corporation, no. 3 (September 30, 2015): 81–87. http://dx.doi.org/10.38013/2542-0542-2015-3-81-87.

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A mathematical model of the "mains - regulated electric drive" radar antenna us with a synchronous motor with permanent magnets. Peculiarities of work at a controlled electric variable speed electric motor shaft. A method and control system with motorized adjustable mechanical and electronic scanning of the antenna, improving performance characteristics of radar stations.

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Karady, G. G., S. H. Berisha, M. Muralidhar, J. A. Demcko, and M. Samotyj. "Variable speed motor drive generated magnetic fields." IEEE Transactions on Power Delivery 9, no. 3 (July 1994): 1639–46. http://dx.doi.org/10.1109/61.311199.

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Nakamae, E., H. Yamashita, K. Kaneda, Y. Ohnogi, and K. Kagawa. "Noiseless variable-speed squirrel-cage induction motor." IEEE Transactions on Energy Conversion 5, no. 2 (June 1990): 380–85. http://dx.doi.org/10.1109/60.107236.

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Dursun, Emre Hasan, and Akif Durdu. "Speed Control of a DC Motor with Variable Load Using Sliding Mode Control." International Journal of Computer and Electrical Engineering 8, no. 3 (2016): 219–26. http://dx.doi.org/10.17706/ijcee.2016.8.3.219-226.

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7

Mardiyanto, Ignatius Riyadi. "The Harmonics Effect of Variable Speed Drives on Generator Performance." Current Journal: International Journal Applied Technology Research 1, no. 2 (October 1, 2020): 112–19. http://dx.doi.org/10.35313/ijatr.v1i2.34.

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Large motors often burden synchronous generators as power plants in factories. This motor is commonly using to regulate rotation using Variable Speed Drive (VSD). From the load side, VSD, as a regulator of motor rotation, can reduce power loss. On the generator side as a power plant, this load with VSD affects the waveform of the generator. The experiments on a small capacity generator (6 kVA) with a VSD as regulating the motor rotation with a load of about 1.1 kW shows effectiveness power transfer is about 40.7% with VSD, and without VSD, efficiency is approximately 39.6%. The motor losses by installing VSD interpreted as transferring losses to the generator with savings is about 1 %. The experiments also showed that generator performance decreases when loaded with VSD at around 6%, and a generator temperature increases at 20 0C higher than without VSD.

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Marchi, A., A. R. Simpson, and N. Ertugrul. "Assessing variable speed pump efficiency in water distribution systems." Drinking Water Engineering and Science 5, no. 1 (July 4, 2012): 15–21. http://dx.doi.org/10.5194/dwes-5-15-2012.

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Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to pumping. Recent studies have considered variable speed pumps (VSPs) which aim to vary the operating point of the pump to match demand to pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed pumping systems, however, is the total efficiency of the electric motor/pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed pumps (including electric motors, variable frequency drives and the pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of motor types, sizing, duty cycle of pump (ratio of on-time and time period), losses due to installation and motor faults. All these factors affect the efficiency of motor drive/pump system.

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Marchi, A., A. R. Simpson, and N. Ertugrul. "Assessing variable speed pump efficiency in water distribution systems." Drinking Water Engineering and Science Discussions 5, no. 1 (March 15, 2012): 47–65. http://dx.doi.org/10.5194/dwesd-5-47-2012.

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Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to pumping. Recent studies have considered variable speed pumps (VSPs) which aim to vary the operating point of the pump to match demand to pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed pumping systems, however, is the total efficiency of the electric motor/pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed pumps (including electric motors, inverters and the pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of motor types, sizing, duty cycle of pump (ratio of on-time and time period), losses due to installation and motor faults. All these factors affect the efficiency of motor drive/pump system.

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10

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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11

KONG, Xiangdong. "Constant Speed Control Method of Variable Speed Input Fixed Displacement Pump-constant Speed Output Variable Motor System." Journal of Mechanical Engineering 52, no. 8 (2016): 179. http://dx.doi.org/10.3901/jme.2016.08.179.

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12

V. D. Ghuge, V. D. Ghuge, and J. P. Modak J. P. Modak. "Developing a Constant Output Speed Transmission For Human Powered Flywheel Motor (Hpfm) with Variable Input Speed- a Novel Gearbox." Indian Journal of Applied Research 3, no. 6 (October 1, 2011): 218–20. http://dx.doi.org/10.15373/2249555x/june2013/71.

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13

Sucipto, Hari, Sigit Setya Wiwaha, and Imron Ridzki. "INSTALASI ESP (ELECTRIC SUBMERSIBLE PUMP) SISTEM TANDEM PADA SUMUR MINYAK DENGAN VARIABLE SPEED DRIVE." JURNAL ELTEK 16, no. 1 (August 21, 2018): 51. http://dx.doi.org/10.33795/eltek.v16i1.86.

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When the pressure of an oil well is not too large to do Natural Flow, Artificial Lift is one of the methods that can be used to replace it, artificial lift usually using ESP (Electric Submersible Pump). ESP oil pump in petroleum is equipped with VSD (Variable Speed Drive) component to adjust motor speed as softstarter and oil rate regulator and as pump motor protection. For ESP construction with a motor tandem system installed on wells with different characteristics and depths that are different from ESP single motors. However, submersible pumps are augmented by increasing the number of pump stages according to the depth of the well by coupling, submersible electric motors can be mechanically coupled and electrically on a spindle between upper motor and center motor.

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14

Peng, Tian Hao, Nan Geng Yue, Jia Dong Liu, and Mei Sheng Yang. "Open-Loop Speed Loss Compensation Method and Simulation Analysis under Variable Load." Applied Mechanics and Materials 130-134 (October 2011): 2709–14. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.2709.

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This paper analyzed the reasons of motor speed loss under variable load in variable-speed pump-control-motor governing system, and pointed out that oil compressibility caused by load change is one of the reasons. Speed drop compensation coefficients ware derived, and the compensation method under variable load in variable-speed pump-control-motor governing system was built. The simulation results show that the compensation method can well compensate motor speed loss in variable load.

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15

Toma, Daniel, Cristina-Mihaela Vîrlan, and Nicolae Marcoie. "Determination of Global Efficiencies of Variable Speed Pumps within Water Supply Systems." Ovidius University Annals of Constanta - Series Civil Engineering 20, no. 1 (December 1, 2018): 81–88. http://dx.doi.org/10.2478/ouacsce-2018-0009.

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Abstract The energy transformations involved in the operation of the pumping installations are carried out by pumping aggregates consisting of an electric motor and a pump. In order to provide a full adaptation to the users’ variable demands, variable speed motor driven pumps are used on networks (such motors being equipped with frequency converters). The paper presents a method for determining the global efficiency of a frequency converter-asynchronous motor-pump group. The method has been implemented at the Chiriţa Pumping Station, main facility within the Iasi City water supply system.

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16

Zhou, Jia, Xiao Long Tan, and Wen Bin Wang. "Research of Control System of Variable Frequency Motor." Applied Mechanics and Materials 556-562 (May 2014): 2244–47. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2244.

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Variable frequency motors replace traditional ones which use mechanical and DC speed regulation strategies. The frequency of the motor torque and the motor inductance and frequency are directly related. Therefore, the inverter motor control system analysis and modeling of nonlinear frequency conversion motor without inductance calculations.

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17

Zhou, Shao Qing, Cong Li Mei, Guo Hai Liu, Wen Tao Huang, and Dong Xin Shu. "ARM-Based Speed Regulating System for Asynchronous Motor." Advanced Materials Research 852 (January 2014): 686–91. http://dx.doi.org/10.4028/www.scientific.net/amr.852.686.

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Owing to their simple structure and stability, AC induction motors have been widely used in many fields. With the development of electronic devices, variable-frequency speed regulation system of the induction motor is widely used. This paper introduces an ARM chip controller LM3S818 from Texas Instruments in detail as a microprocessor of the variable frequency speed regulation system for asynchronous motor. The main circuit of AC-DC-AC Variable frequency way is adopted and the control system is based on Space Vector Pulse Width Module. The hardware structure and the design of software both are presented. And experimental results show the good performance in different frequency.

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18

Osawa, Hiroshi, Shigenori Kinoshita, and Takayoshi Nakano. "High-performance variable speed control of synchronous motor." IEEJ Transactions on Industry Applications 107, no. 2 (1987): 175–82. http://dx.doi.org/10.1541/ieejias.107.175.

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19

Stemmler, Herber, and Adriam Omlin. "Converter Controlled Fixed-Frequency Variable-Speed Motor/Generator." IEEJ Transactions on Industry Applications 116, no. 10 (1996): 993–1000. http://dx.doi.org/10.1541/ieejias.116.993.

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20

Packer, Helen L., Helen Lawther, and Judith P. Armitage. "TheRhodobacter sphaeroidesflagellar motor is a variable-speed rotor." FEBS Letters 409, no. 1 (June 2, 1997): 37–40. http://dx.doi.org/10.1016/s0014-5793(97)00473-0.

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21

Suriano, J. R., and Chee-Mun Ong. "Variable reluctance motor structures for low-speed operation." IEEE Transactions on Industry Applications 32, no. 2 (1996): 345–53. http://dx.doi.org/10.1109/28.491483.

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22

Emil Hasan, Amilia, Haryani Hassan, and Ismadi Bugis. "Variable Speed Vector Control for Induction Motor of Electric Vehicle." Applied Mechanics and Materials 699 (November 2014): 759–64. http://dx.doi.org/10.4028/www.scientific.net/amm.699.759.

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This paper presents the speed performance of an induction motor by using a vector control. The control scheme used is an indirect vector control for define speed command. The main focus of this research is to observe on the dynamic speed performance of the induction motor when the command speed is given to the motor. In this study, the system of indirect vector control will be built by using Matlab Simulink. In fact, the expression of exciting flux linkage and electromagnetic torque are used to create a simple embedded system which to find out the effects of flux weakening in motor while, the gain of the speed controller is 100. The result shows that the vector control method will cause immediate the motor speed response with a small electromagnetic torque ripple. Furthermore, the output mechanical torque starts to decrease when the motor speed above the base speed to maintain a constant output power operation. This paper contributes a new algorithm to analysis the system when the speed motor is higher than a base speed.

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23

Oshurbekov, Safarbek, Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, and Levon Gevorkov. "Energy Consumption Comparison of a Single Variable-Speed Pump and a System of Two Pumps: Variable-Speed and Fixed-Speed." Applied Sciences 10, no. 24 (December 9, 2020): 8820. http://dx.doi.org/10.3390/app10248820.

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The energy efficiency of a multi-pump system consisting of two low-power (0.75 kW) pumps operating in parallel mode and a single-pump mechanism (1.5 kW) is compared in this study. For this purpose, mathematical models, experimental data, and data retrieved from the manuals provided by the pump manufacturers are used. The single-pump system is fed by a single variable speed drive. A multi-pump system running in parallel mode consists of two pumps. One of them is driven by an induction motor connected directly to the electrical grid and equipped with a throttle. Another pump is actuated by an induction motor fed by a variable speed drive. The flowrate of the liquid in the multi-pump is controlled with the help of speed variation and throttling. In the case of the single-pump system the conventional speed control method is applied during the analysis. For both pump system topologies, the daily and annual energy consumption is obtained. As a result of conducted calculations, it was shown that the multi-pump provides 29.8% savings in comparison to the single-pump system in the case of a typical flowrate profile.

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24

PENG, Tianhao. "Speed Loss Compensation Experiment Study in Variable-speed Pump-control-motor System." Journal of Mechanical Engineering 48, no. 04 (2012): 175. http://dx.doi.org/10.3901/jme.2012.04.175.

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Wang, Yi Wang. "The Development of DSP-Based FFU Motor Digital Variable Frequency Control System." Advanced Materials Research 694-697 (May 2013): 2172–75. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.2172.

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The variable frequency speed control is one of the most important issues for fan filter unit (FFU) system. A novel digital variable frequency control system for FFU motors were proposed and developed to decrease running losses, and improve the speed control effect and accuracy. The system uses high-performance digital signal processor (DSP) TMS320F2812 as the control core, which adopts a dedicated motor pulse width modulation (PWM) control module to achieve the FFU motors real-time online digital variable frequency control. The composition and working principle of control system were illustrated, the hardware and software design were illustrated in detail. Finally, the experimental results on control system prototype were given, which confirm the effectiveness and validity of the control strategy, and demonstrate that the proposed method can achieve accurate variable frequency speed control of FFU motors.

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26

SINGH, BHIM, S. P. SRIVASTAVA, and S. K. BARAL. "LOAD COMMUTATED INVERTER FED VARIABLE SPEED RELUCTANCE MOTOR DRIVE." Electric Machines & Power Systems 18, no. 3 (May 1990): 277–82. http://dx.doi.org/10.1080/07313569008909472.

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27

Jezernik, Karel, Asif Šabanović, and Miran Rodič. "Speed Sensorless Variable Structure Torque Control of Induction Motor." Automatika 51, no. 1 (January 2010): 33–40. http://dx.doi.org/10.1080/00051144.2010.11828353.

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28

Jezernik, Karel, Gregor Edelbaher, and Asif Šabanović. "LOW SPEED SENSORLESS VARIABLE STRUCTURE CONTROL OF INDUCTION MOTOR." IFAC Proceedings Volumes 38, no. 1 (2005): 145–50. http://dx.doi.org/10.3182/20050703-6-cz-1902.01236.

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29

Hwi-Beon Shin. "New antiwindup PI controller for variable-speed motor drives." IEEE Transactions on Industrial Electronics 45, no. 3 (June 1998): 445–50. http://dx.doi.org/10.1109/41.679002.

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30

de Almeida, Pedro Machado, Rodolfo Lacerda Valle, Pedro Gomes Barbosa, Vinicius Foletto Montagner, Vladimir Cuk, and Paulo Fernando Ribeiro. "Robust Control of a Variable-Speed BLDC Motor Drive." IEEE Journal of Emerging and Selected Topics in Industrial Electronics 2, no. 1 (January 2021): 32–41. http://dx.doi.org/10.1109/jestie.2020.3035055.

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31

Kuo-Kai Shyu, Faa-Jeng Lin, Hsin-Jeng Lin, and Bor-Sen Juang. "Robust variable structure speed control for induction motor drive." IEEE Transactions on Aerospace and Electronic Systems 35, no. 1 (1999): 215–24. http://dx.doi.org/10.1109/7.745693.

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32

Alwardat, M. Ya, and P. V. Balabanov. "SPEED CONTROL OF DC MOTOR USING PID CONTROLLER BASED ON MATLAB." Vestnik Tambovskogo gosudarstvennogo tehnicheskogo universiteta 27, no. 2 (2021): 195–202. http://dx.doi.org/10.17277/vestnik.2021.02.pp.195-202.

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DC motors are widely used in industrial variable speed applications due to their more demanding speed and torque characteristics and easy control aspects. This article introduces a method to control the speed of a DC motor using a PID controller to control the speed of a DC motor, and also uses MATLAB software for calculations and simulation. The choice of PID parameters has been elucidated as a result of several variation experiments.

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33

Imran, Omar A., Wisam Najm al-din Abed, and Ali N. Jbarah. "Speed control of universal motor." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 1 (March 1, 2019): 41. http://dx.doi.org/10.11591/ijpeds.v10.i1.pp41-47.

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Universal Motors (UM) are normally used for driving portable apparatus such as hand tool machines, vacuum cleaners and most domestic apparatus. The importance of UM is due to its own advantages such as high starting torque, very powerful in relation to its small size, having a variable speed; and lower cost. So, this paper focus on UM speed control under variable loading conditions. A mathematical model for UM is designed. Two controllers are proposed for controlling the motor speed, output rate controller and output reset controller. Ant Colony Optimization (ACO) is proposed for tuning the controller’s parameters due to its impact on solving different optimization problems. It possesses fast convergence, minimum algorithm parameters required, lower consecution time and give optimal results without needing large number of iterations. The results are compared and discussed accurately, which show the proposed tuning technique work well and give optimal results for both controllers.

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34

Dambrauskas, Karolis, Jonas Vanagas, Saulius Bugenis, Tomas Zimnickas, and Artūras Kalvaitis. "Methodology for Asynchronous Motor Impedance Measurement by Using Higher Order Harmonics." Energies 13, no. 10 (May 17, 2020): 2541. http://dx.doi.org/10.3390/en13102541.

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The control methods of asynchronous motors have changed during past decades. In the past, asynchronous motors were connected to grid directly. Later, thyristors as switching element-based frequency converters for asynchronous motors have appeared. Today, asynchronous motors are controlled with variable speed drives that are frequency converters consisting of IGBT power modules as switching elements that form the output voltage for asynchronous motors. Because of IGBT’s high switching speed of around few kilohertz, higher order harmonics appear in the output voltage. Their influence was not analyzed in the past as the methodology of asynchronous motor winding resistance measurement was under development. In this article, a new methodology of motor resistance measurement for mass production is introduced. The resistance—compared to higher order harmonics values between the windings of benchmark and tested motors—gives an ability to faster and more accurately determine a motor’s characteristics and losses induced by higher order harmonics that appear when a motor is powered by a variable speed drive. Motor winding’s inductance dependency on the current of magnetic biasing and the higher frequency of voltage is analyzed in this article. In addition, the simulation model of resistance to higher order harmonics of motor measurement is introduced and analyzed in this article.

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35

Suroso, Suroso, Winasis Winasis, Daru Tri Nugroho, and Sebastian Adi Prakoso. "Pengaruh Arus Harmonisa Pada Unjuk Kerja Sistem Open-Loop Variable Speed Drive Motor Induksi Menggunkanan Inverter." Dinamika Rekayasa 12, no. 1 (February 6, 2016): 9. http://dx.doi.org/10.20884/1.dr.2016.12.1.139.

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One of the the inverter’s applications is in Variable Speed Drive (VSD) to control the speed of an induction motor by varying the voltage or the output frequency of the inverter. Induction motor reliability driven by using inverter is often affected by harmonics components of the current and voltage generated by the inverter. This phenomenon brings harmonic losses in the industry process applying VSD and induction motors, because not all inverters produce a pure sinusoidal wave. Thi paper presents the effect of harmonics on the performance of squirrel cage induction motor type i.e. the speed, torque and efficiency by conducting computer simulation and experimental test in laboratory. The increase in the value of harmonics resulting an increase in the value of speed 1.41%, an increase in the value of torque 1.81 Nm, and decreased of efficiency 1to5%, the harmonics also resulted torque ripple 2 to5 times resulting in unstable speed of motor, arising engine vibration and causing motor heating

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Fu, Lan Fang, Hua Jun Wang, and He Xu Sun. "Modeling and Simulation of the Brushless Double Rotor Motor for the Novel Wind Power Generation System." Advanced Materials Research 724-725 (August 2013): 491–94. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.491.

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A novel driver concept has been developed to meet the grid requirements. A regulation speed device was connected to a variable speed gearbox with a constant speed synchronous generator.A brushless double rotor motor based on a novel wind power generation system is proposed. The motors structure , principle and mathematic model are studied.The simulation results show that brushless double rotor motor is suitable as a regulation speed device to apply to the novel wind power generation system.

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Fayadh, Rashid Ali. "Control of D.C Motor by Computer." Advanced Materials Research 403-408 (November 2011): 4841–49. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4841.

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D.C motors have special important uses for human that used in many places needs a specific speed or variable speed , so that we need to control this speed for any purpose . Nowadays, the subject of controlling the electric motor and measuring variable is of important subject . Because of scientific and technical development in this field according to difficulty of teaching control material by using computer. In the traditional way the past studies assumed that the best method to understand the concepts of controlling by the computer are by practical exercises in lab and since the lab doesn't contain such ability . This search was represented to do the first step in teaching general principals of controlling by design a window dealing with computer to control the speed of d.c motor . The work on the program helps to use more than one sense which helps to stable the scientific material in the mind of students .

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38

Su, Rui. "Numerical simulation and experimental study of novel variable speed and constant frequency wind turbine." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 9 (September 25, 2018): 3111–16. http://dx.doi.org/10.1177/0954406218802926.

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The variable speed and constant frequency wind turbine with differential speed regulation consist of wind rotor, speed regulating motor, differential gear train, and synchronous generator. The differential gear train has characteristics of double input and single output. The wind rotor with variable speed work as one input; the output speed of differential gear train is regulated to be stable by speed regulating motor as another input. The constant frequency current is generated by a synchronous generator. The system is simplified into three shafts rigid model for dynamic analysis, and the numerical simulation is made in SIMULINK. The frequency conversion motor is used in the test rig as variable speed input of differential gearbox. Servo motor is adopted to regulate speed. The speed of shaft under different speed input is studied. Modal analysis is carried out to get the resonance frequencies of differential gearbox, and moment inertia of test rig is calculated by software to ensure parameters are consistent with simulation. The principle feasibility of variable speed and constant frequency wind turbine with differential speed regulation is verified by the numerical simulation and experiment.

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39

Kushwaha, Prabhakar, Sanjoy K. Ghoshal, and Kabir Dasgupta. "Dynamic analysis of a hydraulic motor drive with variable inertia flywheel." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 234, no. 6 (September 25, 2019): 734–47. http://dx.doi.org/10.1177/0959651819875914.

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A flywheel is presented in this article, which can adaptively generate variable inertia in response to the application requirements in a hydraulic drive. The said flywheel consists of four sliders in the guide track of a host flywheel frame which change its position as the rotational speed of the flywheel varies. The varying distance between the slider and the center of rotation leads to a variable inertial mass. This passive inertial mass has a potential to reduce the speed fluctuations of the drive. A comparative study has been made on the effects of the variable inertia flywheel on the hydraulic motor speed fluctuations with that of the fixed inertia flywheel. In this respect, a bond graph model of the hydraulic motor drive with the variable inertia flywheel and the fixed inertia flywheel is developed to analyze their performances. The variable inertia generated by the variable inertia flywheel reduces the hydraulic motor speed fluctuations in response to the changes in the excitation inputs. The tests were conducted to validate the model for step change in speed of the hydraulic motor. The test results of the hydraulic motor speed response are found in good agreement with the predicted response. The proposed design of the flywheel reduces the peak speed of the hydraulic motor that enhances the reliability and performance of the drive.

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40

Nonaka, S., and T. Kawaguchi. "Variable-speed control of brushless half-speed synchronous motor by voltage source inverter." IEEE Transactions on Industry Applications 27, no. 3 (1991): 545–51. http://dx.doi.org/10.1109/28.81840.

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41

Paszota, Zygmunt. "Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system.: Part II Rotational hydraulic motor speed parallel throttling control and volumetric control systems." Polish Maritime Research 15, no. 4 (January 1, 2008): 21–29. http://dx.doi.org/10.2478/v10012-007-0093-y.

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Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system.: Part II Rotational hydraulic motor speed parallel throttling control and volumetric control systems Paper presents graphical interpretation of the power of energy losses in the hydrostatic drive and control system elements and also of the power developed by those elements. An individual system fed by a constant capacity pump, where rotational hydraulic motor speed control is effected by a parallel throttling control system, is analyzed and also a system with the rotational hydraulic motor speed volumetric control by a variable capacity pump, an individual system with a rotational hydraulic motor volumetric speed control by means of a simultaneous change of the pump capacity per one revolution and change of the motor capacity per one revolution, the system operating at the constant pressure in the pump discharge conduit equal to the nominal pressure of the system: pP2 = pn and central system (with situated in parallel and simultaneously operating motors) with volumetric speed control of each rotational hydraulic motor by a motor secondary circuit assembly, the system fed by a pump with variable capacity per one shaft revolution fitted with pressure regulator pP2 = pn.

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Takahara, Kazuaki, Katsuhiro Hirata, Noboru Niguchi, and Akira Kohara. "Current superimposition variable flux reluctance motor with 8 salient poles." Open Physics 15, no. 1 (December 29, 2017): 857–61. http://dx.doi.org/10.1515/phys-2017-0102.

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AbstractWe propose a current superimposition variable flux reluctance motor for a traction motor of electric vehicles and hybrid electric vehicles, which consists of 10 salient poles in the rotor and 12 slots in the stator. However, iron losses of this motor in high rotation speed ranges is large because the number of salient poles is large. In this paper, we propose a current superimposition variable flux reluctance motor that consists of 8 salient poles and 12 slots. The characteristics of the 10-pole-12-slot and 8-pole-12-slot current superimposition variable flux reluctance motors are compared using finite element analysis under vector control.

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Khramshina, Ekaterina A., Alexander S. Karandaev, and Rifkhat R. Khramshin. "Improving Energy Efficiency of the Variable Frequency Drive of the Forced-Draught Fan with the Two-Speed Asynchronous Motor." Applied Mechanics and Materials 792 (September 2015): 128–33. http://dx.doi.org/10.4028/www.scientific.net/amm.792.128.

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Based on the example of forced-draught fans of the GOFHWB-100 series hot water boilers (gas and oil fired hot water boilers) power supply reserves of the electric drive with two-speed asynchronous motor have been determined. The structural chart of the developed control system of the electric drive with winding changeover depending on the boiler performance is provided. The paper considers power consumption of electric drive in the variable frequency speed control mode at the motor operation on the high and low speed windings. It presents methods for calculation of energy performance based on computing the equivalent efficiency of the fluid-handling application. The analysis of the efficiency change has proved that the variable frequency control enables electric power savings at the low speed winding by 5 to 6%. The results obtained are recommended to be widely applied at the change-over of the electric drives with two-speed asynchronous motors to the variable frequency control of performance.

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Li, Qiang, Yi-ming Fang, Jian-xiong Li, and Zhuang Ma. "Nonlinear Compound Control for Nonsinusoidal Vibration of the Mold Driven by Servo Motor with Variable Speed." Mathematical Problems in Engineering 2019 (October 22, 2019): 1–9. http://dx.doi.org/10.1155/2019/1728768.

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In this paper, a fuzzy PI control method based on nonlinear feedforward compensation is proposed for the nonsinusoidal vibration system of mold driven by servo motor, rotated in single direction with variable speed. During controller design, there are mainly two issues to consider: (i) nonlinear relationship (approximate periodic function) between mold displacement and servo motor speed and (ii) uncertainties caused by backlash due to motor variable speed. So, firstly, the relationship between mold displacement and motor rotation speed is built directly based on the rotation vector method. Then, an observer is designed to estimate the uncertainties and feedforward compensation. Secondly, as the motor rotates in single direction with variable speed, a fuzzy control with bidirectional parameter adjustment is adopted to improve rapidity and stability based on the traditional PI method. Finally, some simulation results show the effectiveness of the proposed control method.

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Zribi, Mohamed, and Muthana T. Alrifai. "Robust controllers for variable reluctance motors." Mathematical Problems in Engineering 2005, no. 2 (2005): 195–214. http://dx.doi.org/10.1155/mpe.2005.195.

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This paper investigates the control problem of variable reluctance motors (VRMs). VRMs are highly nonlinear motors; a model that takes magnetic saturation into account is adopted in this work. Two robust control schemes are developed for the speed control of a variable reluctance motor. The first control scheme guarantees the uniform ultimate boundedness of the closed loop system. The second control scheme guarantees the exponential stability of the closed loop system. Simulation results of the proposed controllers are presented to illustrate the theoretical developments. The simulations indicate that the proposed controllers work well, and they are robust to changes in the parameters of the motor and to changes in the load.

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Renius, A. Jeya Selvan, and K. Vinoth Kumar. "Analysis of Variable Speed PFC Chopper Fed BLDC Motor Drive." International Journal of Power Electronics and Drive Systems (IJPEDS) 5, no. 3 (February 1, 2015): 326. http://dx.doi.org/10.11591/ijpeds.v5.i3.pp326-335.

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This paper provides the detailed analysis of the DC-DC chopper fed Brushless DC motor drive used for low-power applications. The various methods used to improve the power quality at the ac mains with lesser number of components are discussed. The most effective method of power quality improvement is also simulated using MATLAB Simulink. Improved method of speed control by controlling the dc link voltage of Voltage Source Inverter is also discussed with reduced switching losses. The continuous and discontinuous modes of operation of the converters are also discussed based on the improvement in power quality. The performance of the most effective solution is simulated in MATLAB Simulink environment and the obtained results are presented.

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Da Cunha, J. P., G. Champenois, and J. D. Gabano. "Thermal Diagnosis on a D.C. Motor Working with Variable Speed." IFAC Proceedings Volumes 30, no. 18 (August 1997): 435–40. http://dx.doi.org/10.1016/s1474-6670(17)42440-2.

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Alberti, Luigi, Nicola Bianchi, and Silverio Bolognani. "Finite element modeling of induction motor for variable speed drives." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 29, no. 5 (September 14, 2010): 1245–56. http://dx.doi.org/10.1108/03321641011061452.

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Malekpour, Mostafa, Rasoul Azizipanah-Abarghooee, Fei Teng, Goran Strbac, and Vladimir Terzija. "Fast Frequency Response From Smart Induction Motor Variable Speed Drives." IEEE Transactions on Power Systems 35, no. 2 (March 2020): 997–1008. http://dx.doi.org/10.1109/tpwrs.2019.2936970.

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Chan, C. C., J. Z. Jiang, G. H. Chen, and X. Y. Wang. "A novel high power density permanent magnet variable-speed motor." IEEE Transactions on Energy Conversion 8, no. 2 (June 1993): 297–303. http://dx.doi.org/10.1109/60.222720.

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Journal articles on the topic 'VARIABLE-SPEED MOTOR'

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