Current Delay Compensation Decoupling Control for Digital Control System of PMSM at High Speed

Lixiang Sun; Haifeng Wei; Hanpei Wei; Jia Cui

doi:10.6919/ICJE.202507_11(7).0003

Current Delay Compensation Decoupling Control for Digital Control System of PMSM at High Speed

Lixiang Sun, Haifeng Wei, Hanpei Wei, Jia Cui

International Core Journal of Engineering, (2025), Vol.11, No.7, pp.14-23

Published: June 27, 2025

DOI: 10.6919/ICJE.202507_11(7).0003

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Abstract

A current delay compensation decoupling control for digital control system of permanent magnet synchronous motor (PMSM) is presented. Unlike the previous complex analysis method of multiple-input multiple-output (MIMO) system, this paper simplifies the MIMO system of PMSM into analyzable single-input single-output (SISO) system. On this basis, the complex vector root locus analysis method is used to analyze the influence of the time delay of digital control system on PMSM control at high speed. Then a current control method with time delay compensation decoupling term is designed to compensate the magnitude and phase errors of voltage commands, which improves the stability and dynamic performance of current control at high speed. The proposed control method is easy to implement, and its good performance are illustrated through experimental results.

Keywords: Permanent Magnet Synchronous Motor; Current Delay Compensation Decoupling Control; MIMO System; SISO System; Complex Vector Root Locus Analysis.

APA Citation: Lixiang Sun, Haifeng Wei, Hanpei Wei, Jia Cui (2025). Current Delay Compensation Decoupling Control for Digital Control System of PMSM at High Speed. International Core Journal of Engineering, 11(7), 14-23. https://doi.org/10.6919/ICJE.202507_11(7).0003

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