Adaptive Harmonic Elimination Model Predictive Current Control of PMSM in Aviation Electric Propulsion Systems

Permanent magnet synchronous motor (PMSM) drive controllers are widely used in industrial systems due to their high reliability, and low operational and maintenance costs. However, PMSM produces unwanted harmonics while operating, which can cause issues including motor vibration, and the degradation of internal components. Excessive harmonics lead to issues directly affecting motor performance and efficiency, therefore, it is crucial to mitigate or eliminate unwanted harmonics. Herein, a model predictive current control (MPCC) method with an adaptive harmonic elimination strategy is utilized to reduce unwanted harmonics. By adjusting the weights of the adaptive filter, this method effectively removes unwanted frequency components from the main input signal, as determined by a cost function, resulting in an ideal reference voltage for the converter input. Experiments on a PMSM show that the proposed method effectively eliminates harmonics generated by the converter’s dead-time effect while maintaining system response speed, thereby enhancing the stability of the electric propulsion system.