关键词: 双三相永磁同步电机, 自抗扰控制, 谐波电流抑制, 坐标变换

Abstract: To address the issues of significant harmonic currents and inferior rapidity rejection in traditional fourdimensional vector control for dual three-phase permanent magnet synchronous motor,this paper proposes a four-dimensional control strategy integrating super twisting-linear active disturbance rejection control ( ST-LADRC ) and an improved coordinate transformation-proportional resonant ( CT-PR) harmonic suppression method. The ST-LADRC strategy leverages the characteristics of the super-twisting algorithm to enhance the active disturbance rejection control,thereby improving the system's dynamic response and robustness. The CT-PR strategy introduces a novel coordinate transformation matrix in the harmonic plane to convert 5th and 7th harmonics into 6th harmonics, combined with quasi-proportional-resonant control, effectively reducing motor harmonic currents and losses while simplifying parameter tuning. Simulation results demonstrate that the ST-LADRC strategy significantly enhances the dynamic performance and disturbance rejection capability of the dual threephase PMSM speed regulation system. The CT-PR strategy successfully suppresses harmonic currents, achieving a 2. 98% reduction in harmonic content compared to conventional four-dimensional vector control,with notably lower harmonic currents.

Key words: dual three-phase permanent magnet synchronous motor, active disturbance rejection control, harmonic current suppression, coordinate transformation