Review and New Expansion of the Active Damping Strategy of the PMSM Drive System with LC Sine Wave Filter

Active damping (AD) strategy is an economical and efficient method to solve the resonant problem of the permanent magnet synchronous motor (PMSM) drive system with inductor-capacitor (LC) sine wave filter. In this article, the AD methods used in PMSM drive system are classified as inherent damping (ID), state variable feedback, and digital filter. Based on this, the purpose of this article is to provide an overview and analysis of the AD methods on PMSM drive system in recent years, and to comprehensively review, compare, and summarize the stability, dynamic performance, robustness, and algorithm complexity. Furthermore, a new expansion of AD method based on capacitor current feedback with high-pass filter (HPF-CCF) is studied to ensure the effectiveness when the resonant frequency is around sixth of the sampling frequency. The simulation and experimental results validate the effectiveness of theoretical analysis.