• Title, Summary, Keyword: Maximum torque per ampere

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Current-Sensorless Maximum Torque per Ampere Control for a Surface Mounted Permanent Magnet Synchronous Motor with Low-Resolution Position Sensor (저분해능 위치센서를 갖는 표면부착형 영구자석 동기전동기의 전류센서 없는 단위 전류 당 최대 토크 제어)

  • Lee, Kwang-Woon
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.3
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    • pp.204-210
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    • 2009
  • This paper proposes a novel current-sensorless maximum torque per ampere control for a surface mounted permanent magnet synchronous motor with low-resolution position sensor. A direct axis current is estimated from the mathematical model of the permanent magnet synchronous motor and the phase angle between direct and quadrature axis voltage commands is controlled to adjust the estimated direct axis current to zero, thus a maximum torque per ampere control can be achieved. The proposed method is suitable for low cost applications with slow dynamic response characteristics.

MTPA Control of Induction Motor Drive using Fuzzy-Neural Networks Controller

  • Lee, Jung-Chul;Lee, Hong-Gyun;Nam, Su-Myeong;Choi, Jung-Sik;Ko, Jae-Sub;Chung, Dong-Hwa
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1474-1477
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    • 2005
  • This paper is proposed maximum torque per ampere of induction motor using fuzzy-neural networks controller. Operation of maximum torque per ampere is achieved when, at a given torque and speed, the slip frequency is adjusted to that so that the stator current amplitude is minimized. This paper introduces a induction motor drive system with fuzzy-neural networks controller. A neural network-based architecture is described for fuzzy logic control. The characteristic rule and their membership function of fuzzy system are represented as the processing nodes in the neural network structure. This paper is proposed the analysis as well as the simulation results to verify the effectiveness of the new method.

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Maximum Torque Control of Induction Motor Drive using Multi-HBPI Controller (다중 HBPI 제어기를 이용한 유도전동기 드라이브의 최대토크 제어)

  • Kang, Sung-Jun;Ko, Jae-Sun;Choi, Jung-Sik;Baek, Jeong-Woo;Jang, Mi-Geum;Kim, Soon-Young;Chung, Dong-Hwa
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.363-366
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    • 2009
  • The maximum output torque developed by the machine is dependent on the allowable current rating and maximum voltage that the inverter can supply to the machine. Therefore, to use the inverter capacity fully, it is desirable to use the control scheme considering the voltage and current limit condition, which can yield the maximum torque per ampere over the entire speed range. This controller is controlled speed and current using hybrid PI(HBPI) controller and estimation of speed using ANN. Also, this paper is proposed control of maximum torque per ampere(MTPA) of induction motor. This strategy is proposed which is simple in structure and has the honest goal of minimizing the stator current magnitude for given load torque. The performance of the proposed induction motor drive with maximum torque control using HBPI controller is verified by analysis results at dynamic operation conditions.

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Study of Maximum Torque Operation of Interior Permanent Magnet Synchronous Motor in Constant Torque Region (매입형 영구자석 동기전동기의 일정 토크 영역에서 최대 토오크 운전에 관한 연구)

  • Kim, Jang-Mok;Kim, Su-Yeol;Ryu, Ho-Seon;Im, Ik-Hun
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.3
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    • pp.195-203
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    • 2000
  • In this paper a new controller is proposed to operate the interior permanent magnet synchronous motor(IPMSM) by the control method of the maximum torque per ampere in constant torque region. The implementation method of the conventional torque controller is explained and analyzed exactly. The proposed controller does not use the torque and q-axis current of the speed controller but the amplitude of the stator current in order to utilize not only the magnetic alignment torque but also the reluctance in the constant region, gurantees the linearity of the torque, and is easily implemented. These attractive are verified through the experiment.

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Maximum Torque per Ampere Control of Interior Permanent Magnet Synchronous Motor based on Signal Injection (실시간 신호 주입을 이용한 매입형 영구자석 동기 전동기의 단위 전류당 최대 토크 제어)

  • Kim, Sung-Min;Sul, Seung-Ki
    • The Transactions of the Korean Institute of Power Electronics
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    • v.15 no.2
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    • pp.142-149
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    • 2010
  • Interior Permanent Magnet Synchronous Motor(IPMSM) have gained an increasing popularity in recent years for a variety of industrial applications, because of their high power density, high efficiency and possibility of flux weakening operation. Because the efficiency of IPMSM is one of the important performance characteristic, the Maximum Torque Per Ampere(MTPA) operating method has been indispensible. In theory, MTPA operating point can be calculated using the exact values of the machine parameters. However, the values of the IPMSM parameters are known to vary widely according to the operating condition. Therefore, to operate the IPMSM in the MTPA operating point, the machine parameters should be estimated in real-time. In this paper, the new MTPA operating method based on the signal injection is presented. By injecting the high frequency current signal, the MTPA operating criteria can be calculated by measuring the input power to IPMSM. The proposed method can find the MTPA operating point with simple signal processing regardless of the parameter variation.

A Torque Compensation Method Considering Temperature Variation of SPMSM

  • Jung, Tae-Uk;Park, Chang-Seok
    • Journal of Electrical Engineering and Technology
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    • v.13 no.1
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    • pp.160-167
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    • 2018
  • This paper analyzed the effect of temperature on the permanent magnet flux and output torque. The major parameter which will impact the torque control accuracy of a surface mounted permanent magnet motor is the variation of the permanent magnet temperature. In addition, the temperature variation of the permanent magnet will also influence the maximum torque per ampere of the motor. To analyze the effect of temperature on the permanent magnet, the rotor of the motor was directly heated to measure the temperature and the permanent magnet flux was measured. As a result, the output torque of the motor decreases as the temperature of the rotor permanent magnet increases. Therefore, this paper proposes a technique to compensate the phase current of the motor by estimating permanent magnet flux, and it is proved through theoretical basis and several experiments.

Maximum Torque per Ampere Operation of IPMSM Drives for the Next Generation High Speed Railway System (IPMSM 구동 차세대 고속전철 시스템의 최대 토크운전)

  • Jin, Kang-Hwan;Kim, Sung-Je;Yi, Du-Hee;Kwon, Soon-Hwan;Kim, Yoon-Ho
    • Proceedings of the KSR Conference
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    • pp.1262-1270
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    • 2010
  • The next generation domestic high speed railway system is a power dispersed type and uses vector control method for motor speed control. Nowadays, inverter driven induction motor system is widely used. However, recently PMSM drives are deeply considered as a alternative candidate instead of an induction motor driven system due to their advantages in efficiency, noise reduction and maintenance. In this paper, the maximum torque control approach is presented for the IPMSM drives with reluctance torque. The applied control method uses maximum torque control per ampere technique. Simulation programs based on Matlab/Simulink are developed. Finally the designed system is verified by simulation and their characteristics are analyzed by the simulation results.

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Nonlinear and Adaptive Back-Stepping Speed Control of IPMSM (IPMSM 전동기의 비선형 적응 백스텝핑 속도 제어)

  • Jeon, Yong-Ho;Cho, Whang
    • The Journal of the Korea institute of electronic communication sciences
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    • v.6 no.6
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    • pp.855-864
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    • 2011
  • In this paper, a nonlinear controller based on adaptive back-stepping method is proposed for high performance operation of IPMSM(Interior Permanent Magnet Synchronous Motor). First, in order to improve the performance of speed tracking a nonlinear back-stepping controller is designed. Since it is difficult to control the high performance driving without considering parameter variation, a parameter estimator is included to adapt to the variation of load torque in real time. In addition, for the efficiency of power consumption of the motor, controller is designed to operate motor with minimum current for maximum torque. The proposed controller is applied through simulation to the a 2-hp IPMSM for the angular velocity reference tracking performance and load torque volatility estimation, and to test the MTPA(Maximum Torque per Ampere) operation in constant torque operation region. The result verifies the efficacy of the proposed controller.

Virtual Signal Injected MTPA Control for DTC Five-Phase IPMSM Drives

  • Liu, Guohai;Yang, Yuqi;Chen, Qian
    • Journal of Power Electronics
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    • v.19 no.4
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    • pp.956-967
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    • 2019
  • This paper introduces a virtual signal injected maximum torque per ampere (MTPA) control strategy for direct-torque-controlled five-phase interior permanent magnet synchronous motor (IPMSM) drives. The key of the proposed method is that a high frequency signal is injected virtually into the stator flux linkage. Then the responding stator current is calculated and regulated to compensate the amplitude of the flux linkage. This is done according to the relationship between the stator current and the stator flux linkage. Since the proposed method does not inject any real signals into the motor, it does not cause any of the problems associated with high-frequency signals, such as additional copper loss and extra torque ripple. Simulation and experimental results are offered to verify the effectiveness of the proposed method.

Maximum Torque Operation of a PM Synchronous Motor for HEV under Parameter Variation (HEV용 영구자석 동기전동기의 상수변동 시 최대토크 운전)

  • Cho, Kwan-Yuhl
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.11
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    • pp.5128-5134
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    • 2011
  • This paper investigates the dq current trajectory for maximum torque per ampere(MTPA) operation of an interior PM synchronous motor for HEV(Hybrid Electric Vehicle). Based on the dq current trajectory for the MTPA operation derived from the motor parameters, the change of the MTPA operating point for the variation of the motor parameters including the magnet flux and the dq inductances is considered. The dq current trajectory for MTPA operation is verified through the experiment.