Design of band elimination filter for PMSM vector control operable in overmodulation region of inverter

Abstract

This paper proposes a filter design for improving the control performance of the current control system of permanent magnet synchronous motors (PMSMs) using the overmodulation region of an inverter. The control performance of a vector control system for PMSMs using the overmodulation region of an inverter can be improved by suppressing harmonic components that are generated in this region. This paper utilizes band elimination filter (BEF) to eliminate harmonic components; however, unsuitable BEF setting leads to generation of large current oscillation at the resonant frequency of current feedback loop with BEF. In order to deal with these problems, the proposed filter design focuses on gain setting at the cutoff frequency of BEF.The proposed filter design can prevent the generation of current oscillation at the resonant frequency of the system, and can improve current control performance without complex adjustments. Simulations and experiments are carried out to show the effectiveness of the proposed BEF setting. K E Y W O R D S ACR, filter, harmonic components, overmodulation, PMSM, resonant frequency Electr Eng Jpn. 2019;207:45-56.

Speed Stability and Anti-Disturbance Performance Improvement of an Interior Permanent Magnet Synchronous Motor for Electric Vehicles

“…However, the insufficiency of accurate PMSM modeling poses a challenge to the effectiveness of the traditional ADRC strategy, particularly in low-speed conditions and for unconventional PMSM structures such as IPMSM, switched reluctance motor (SRM) and multiple-phase PMSM [10][11][12]. In addition, while the ADRC strategy primarily focuses on speed-loop regulation in PMSM, theoretical analysis indicates that current-loop regulation significantly impacts speed stability and anti-disturbance performance in PMSM [13,14]. Therefore, this study delves into the composite control of speed-loop and current-loop in IPMSM, with a specific emphasis on assessing and comparing three control models for the speed-loop.…”