System delay compensation method for PMSM sensorless control

被引：0
|
作者：
Li W. [1 ]
Liu J. [1 ]
机构：
[1] School of Automation, Northwestern Polytechnical University, Xi’an
来源：
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2023年 / 50卷 / 01期
关键词：
digital implementation; sensorless control; system delay;
D O I：
10.19665/j.issn1001-2400.2023.01.011
中图分类号：
学科分类号：
摘要：
A position observation strategy considering system delay compensation is presented to avoid the position estimation error caused by analog and digital delay of the permanent magnet synchronous motor drive. First, a typical sliding-mode observer is established and the accessibility of sliding mode motion is analyzed. Second, the influence of analog circuits on the stator current is studied, and the transfer functions of analog circuits are derived. The total delay phase caused by the sampling circuit on the stator current is calculated. Third, the current error from digital implementation of the sliding-mode observer is analyzed. Fourth,a direct signal compensation method used for eliminating the influences of the current error is presented. The proposed strategy lowers the detection error of the sliding-mode observer and the transient pro time in closed-loop control. Finally, the proposed strategy is experimentally verified to confirm its merits on s em delay effect elimination and system control performance improvement. © 2023 Science Press. All rights reserved.
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页码：93 / 101
页数：8
相关论文
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