A Parameter Adaptive Feedforward Compensation Method for SPMSM Using Hall-Effect Sensor

This paper introduces a parameter adaptive feedforward compensation method for surface-mounted permanent magnet synchronous motor (SPMSM) equipped with Hall-Effect sensor. The method is based on a conventional nonlinear observer and aims to address the problems associated with inaccurate or fluctuating motor parameters while compensating for the low resolution of the Hall-Effect sensor. By utilizing the position information obtained from the sector switching of Hall sensor, the proposed method can achieve accurate rotor position observation without stationary error. The proposed approach involves a feedforward compensation of the flux linkage vector, and an adaptive controller is proposed to determine the magnitude and phase of the compensation vector, enabling adaptive selection of the compensation vector under the influence of parameters variation. This method eliminates the need to identify specific parameters and enables accurate rotor position estimation, simultaneously enhancing the stability of the observer. The effectiveness of the method is verified by MATLAB/SIMULINK simulations.