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| Torque Ripple Suppression Method of Direct-Drive Permanent Magnet Synchronous Motor Based on Proportional-Integral and Quasi Resonant Controller |
| Zhang Haiyang1, 2, Xu Haiping2, Fang Cheng2, Xiong Cong1, 2 |
1. University of Chinese Academy of Sciences Beijing 100049 China;
2. Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China |
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Abstract Influenced by the nonlinear characteristics of inverter, the air gap flux harmonics and other factors, the stator current of permanent magnet synchronous motor contains a lot of high order harmonic currents, which results in the motor generating harmonic torque ripple. The torque ripple is more serious for direct-drive system. Focused on the problem, a new control method of suppressing the torque ripple based on proportional-integral and quasi-resonant controller is proposed. Because the gain of the ideal resonant controller is infinity great at the resonant frequency, zero steady state error control can be achieved for sinusoidal signal of the resonant frequency. By connecting the resonant controller in parallel with the current loop proportional-integral controller and compensating the harmonic currents, the current waveform can be improved and the torque ripple can also be suppressed with it. The validity and effectiveness of the proposed method are demonstrated by simulation and experimental results.
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Received: 30 August 2016
Published: 25 October 2017
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Corresponding Authors:
中国科学院院地合作项目资助（YDJDBSH-2012-002）
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2017, Vol. 32 
