基于新滑模观测器的永磁同步电机无传感器控制

doi:10.16180/j.cnki.issn1007-7820.2021.12.001

摘要/Abstract

摘要：

针对传统滑模观测器存在的抖振以及转子位置估计存在相位延迟的问题,文中提出一种新颖的变增益滑模观测器。在不同转速下,该滑模增益值可以随反电动势值进行调节,并使用反电动势观测器代替低通滤波器,减小了反电动势估计值含有的高频信号和抖振。文中建立了永磁同步电机无位置矢量控制系统仿真模型,对新型滑模观测器和传统滑模观测器进行比较。结果显示,新型滑膜观测器转速在稳态、加速和加载情况下的误差明显降低,证明所提出的新型滑模观测器抖振小,准确性更高。

关键词: 永磁同步电机, 滑模观测器, 反电动势, 滑模增益, 反电动势观测器, Lyapunov函数, 观测转速, 矢量控制

Abstract:

In this study, a novel variable gain sliding mode observer is proposed to eliminate the chattering of traditional sliding mode observer and the phase delay of rotor position estimation. The designed sliding mode gain can vary with the back EMF value, and the back EMF observer, instead of the low-pass filter, is used to reduce the high frequency signal and chattering of the back EMF estimation value. The mathematical model of position sensorless control system is established, and the novel sliding mode observer is compared with the traditional sliding mode observer. The results show that the error of the new sliding film observer speed in steady state, acceleration and loading conditions is significantly reduced, which proves that the proposed new sliding mode observer has smaller chattering and higher accuracy.

Key words: permanent magnet synchronous motor, sliding mode observer, back EMF, sliding mode gain, back EMF observer, Lyapunov function, the rotational speed observation, vector control

中图分类号:

TP202

仝兆景,郑权,韩耀飞,何国锋,秦紫霓. 基于新滑模观测器的永磁同步电机无传感器控制[J]. 电子科技, 2021, 34(12): 1-6.

TONG Zhaojing,ZHENG Quan,HAN Yaofei,HE Guofeng,QIN Zini. A Novel Sliding Mode Observer for Position Sensorless Control of Permanent Magnet Synchronous Motor[J]. Electronic Science and Technology, 2021, 34(12): 1-6.

图/表 9

图1

图2

图3

图4

表1

永磁同步电机参数表"

参数	参数值
电机极对数	4
转动惯量/kg· $m - 2$	0.000 8
定子轴电感/H	0.008 5
定子轴电感/H	0.008 5
定子电阻/Ω	2.875
转子磁链/Wb	0.175

表1

图5

图6

图7

图8

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