An Adaptive-Gain Sliding Mode Observer with Precise Compensation for Sensorless Control of PMSM

Wenfei Liu, Bo Luo (), Yong Yang, Haoming Niu, Xujun Zhang, Yu Zhou and Chengbi Zeng
Additional contact information
Wenfei Liu: Electric Power Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730070, China
Bo Luo: College of Electrical Engineering, Sichuan University, Chengdu 610065, China
Yong Yang: Electric Power Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730070, China
Haoming Niu: Electric Power Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730070, China
Xujun Zhang: Electric Power Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730070, China
Yu Zhou: College of Electrical Engineering, Sichuan University, Chengdu 610065, China
Chengbi Zeng: College of Electrical Engineering, Sichuan University, Chengdu 610065, China

Energies, 2023, vol. 16, issue 24, 1-16

Abstract: In this paper, we propose a sensorless control strategy for permanent magnet synchronous motors (PMSMs) based on an adaptive-gain sliding mode observer (ASMO) with precise compensation. Firstly, the observer adopts a saturation function with a continuous boundary layer as the switching function to avoid the delay effect of the low-pass filter. In addition, the adaptive-gain method is designed based on a conventional sliding mode observer (SMO) with constant-gain and a saturation function. The adaptive-gain mathematical model is simplified by establishing a nonlinear feedback channel of an SMO. Secondly, in order to improve the practicability and facilitate debugging, the explicit stability condition of an ASMO is deduced according to Lyapunov’s second method. According to the proposed adaptive method, the chattering caused by the mismatch of the sliding-mode gain is suppressed, and the observable speed range is also improved. Thirdly, the position estimation delay problem of an SMO with a continuous switching function is analyzed in detail from the perspective of frequency characteristics. Then, a precise compensation method is proposed for the delay problem, which greatly improves the position estimation accuracy and the control performance. Finally, the correctness of the theory and the feasibility of the ASMO with precise compensation for the sensorless control of PMSMs are verified by experiments.

Keywords: permanent magnet synchronous motor (PMSM); sensorless control; adaptive-gain sliding mode observer (ASMO); precise compensation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/24/7968/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/24/7968/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:24:p:7968-:d:1296686

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().