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

Abstract

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

CLC Number:

TP202

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.

Figures/Tables 9

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Figure 2.

Figure 3.

Figure 4.

Table 1

Parameters of PMSM"

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

Table 1

Figure 5.

Figure 6.

Figure 7.

Figure 8.

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A Novel Sliding Mode Observer for Position Sensorless Control of Permanent Magnet Synchronous Motor

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