关键词: 永磁同步电机, 准比例谐振控制, 扰动观测器, 鲁棒性

Abstract: The permanent magnet synchronous motor ( PMSM) will be influenced by periodic disturbances, such as rotor permanent magnet magnetic field harmonics,inverter nonlinear characteristics and non-periodic disturbances,such as motor parameters variations and unmodeled dynamic error. It cannot suppress the influences of the disturbances effectively by adopting traditional PI control method only in the current loop. Applications of PMSM in high performance occasions are limited. The paper proposed a current control method for PMSM based on quasi-proportional resonant disturbance observer. The proposed method in this paper connected the quasi-proportional resonant controller in parallel with current PI controller
to reduce the content of harmonic currents caused by periodic disturbance. A disturbance observer was designed to observe and compensate voltage errors caused by non-periodic disturbances. Through simulation comparative analysis, the effectiveness of the proposed method in significantly improving the steady, dynamic and robust performance of the system was verified.

Key words: permanent magnet synchronous machines, quasi-proportional resonant control, disturbance observer, robustness