Comparative Study on Decoupling Control Methods for Salient-Pole PMSMs: Parameter Robustness Perspective

For permanent magnet synchronous motor (PMSM) at low carrier ratios, significant d-q axis current dynamic coupling causes current loop oscillation, instability, and eventual loss of control. In practice, PMSM inherent parameters vary with temperature and environment, degrading traditional feedback decoupling delay compensation performance under parameter mismatch. This paper researches complex vector decoupling's decoupling performance and parameter sensitivity. Simulations show the algorithm effectively improves motor control performance at relatively low carrier ratios.