Research on Harmonic Suppression Strategy of Position Sensorless control for Permanent Magnet Synchronous Motor

被引：0
|
作者：
Yang S. [1 ]
Liu S. [1 ]
Li H. [1 ]
Liu S. [1 ]
Zhang X. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, 230009, Anhui Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Harmonic suppression; Permanent magnet synchronous motor; Position sensorless control; Sliding mode observer;
D O I：
10.13334/j.0258-8013.pcsee.181878
中图分类号：
学科分类号：
摘要：
In order to improve the performance of the position sensorless control for permanent magnet synchronous motor (PMSM), a comprehensive harmonic suppression strategy based on the closed-loop control of back electromotive force (EMF) harmonics was proposed. By means of the design of terminal sliding mode observer (SMO), the chattering noise inherent to SMO can be effectively suppressed, thus avoiding the low-pass filter element and improving the observation accuracy of the motor back-EMF. At the same time, through the design of terminal sliding mode surface, the converging process of the observer can be finished in finite time and the dynamic response can be improved. Due to the inverter nonlinearity and the spatial harmonics of the magnetic flux, 6k±1 harmonics may appear in the stator currents and in the back-EMF, resulting in torque ripple, loss, and noise if without effective suppression. Aiming at the harmonic problem, a comprehensive harmonic suppression strategy based on back-EMF harmonic closed-loop control was designed, by which the harmonics in the stator current were removed, as well as the accuracy of position estimation was increased. At last, the validity of the proposed control strategy was verified experimentally on an 18 kW PMSM test rig. © 2019 Chin. Soc. for Elec. Eng.
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页码：6075 / 6084
页数：9
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