关键词: 永磁同步电机, 自抗扰控制, 增强型扩张状态观测器, 扰动抑制, 噪声抑制

Abstract: The system’ s disturbance rejection ability and noise suppression ability cannot be balanced after applying active disturbance rejection control ( ADRC) . In order to solve the problem, a PMSM speed active disturbance rejection control strategy based on a modified extended state observer ( MESO) was proposed. The designed MESO expanded the disturbance differential term to a new state variable based on the ESO, and improved the accuracy of disturbance estimation
through multiple observations of disturbance and disturbance differential term, thereby enhancing the system's disturbance rejection ability. From the perspective of frequency domain analysis, the results showed that the proposed MESO had enhanced disturbance rejection ability in the low frequency band, while maintaining the same noise suppression ability in the high frequency band, and had good frequency characteristics. The experimental comparisons were conducted on the speed control systems of permanent magnet synchronous motors using ADRC and modified ADRC control methods, verifying the superiority of the proposed method.

Key words: permanent magnet synchronous motor ( PMSM), active disturbance rejection control ( ADRC), modified extended state observer( MESO), disturbance rejection, noise suppression