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New Rotor Position Estimation Error Compensation Strategy for Permanent Magnet Synchronous Motor |
Zhang Yi1, 2, Wu Jiaxin1, 2, Li Yafeng1, Wei Haifeng1, 2, Li Yuanjiang1, 2 |
1. School of Electronics and Information Jiangsu University of Science and Technology Zhenjiang 212000 China; 2. Jiangsu Kai Xuan Intelligent Technology Co. Ltd Suzhou 215000 China |
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Abstract Traditional pulsating high frequency injection of permanent magnet synchronous motor (PMSM) adopts traditional modulation signal. In this paper, the influence of different parameters matching of stator resistance and inductance on the stability of the rotor position estimation system is analyzed. It is shown that different parameters matching of the resistance and inductance can easily cause the instability of position estimation system. To solve this problem, the phase-locked loop technology is used to lock the phase of high frequency current response on q axis, and the new modulation signal with the same phase is constructed to process the high frequency current response on q axis, then the position estimation system is guaranteed to be a stable negative feedback system. At the same time, a new position estimation compensation strategy is proposed, which can effectively avoid the problem of estimation error increasing caused by anti EMF and cross coupling. Experimental results verify the effectiveness and practicability of the new rotor position estimation error compensation strategy.
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Received: 12 February 2018
Published: 14 May 2019
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