Position Sensorless Control for Permanent Magnet Synchronous Motor Using Improved Adaptive Super Twisting Observer

doi:10.11985/2023.04.010

Abstract

Abstract:

Aiming at the poor tracking performance of the traditional observer for permanent magnet synchronous motor position sensorless control with a certain initial error, and the change of electrical parameters in the observer will affect the position estimation error, an improved adaptive superhelix observer position sensorless control strategy is proposed. Firstly, the control rate of the superhelix observer is improved, and a high power term is added to the original low power structure to improve the tracking performance of the observer in a large error range. Secondly, by analyzing the impact of resistance error on position estimation, an adaptive law for resistance estimation is designed to eliminate the impact of resistance changes. Moreover, the position estimation performance of the observer is improved at low speeds. Then, the Lyapunov function of the overall observer scheme is designed and the stability of the proposed observer is proved. Finally, a simulation model is built in Matlab/Simulink and the feasibility and effectiveness of the proposed control strategy are verified on an experimental platform.

Key words: Permanent magnet synchronous motor, position sensorless control, super twisting observer, adaptive estimation

CLC Number:

TM351

ZHU Guoyu, AN Xingke, ZHU Dehong, CHEN Qian. Position Sensorless Control for Permanent Magnet Synchronous Motor Using Improved Adaptive Super Twisting Observer[J]. Journal of Electrical Engineering, 2023, 18(4): 84-95.

Figures/Tables 24

References 24

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参数	数值	参数	数值
定子电阻R_s/Ω	0.9	控制周期T_s/μs	100
定子电感L_s/mH	0.65	死区时间T_d/μs	2
永磁体磁链φ_f/Wb	0.003	母线控制电压U_dc/V	50
电机极对数	5	开关频率f_s/kHz	10