Research on Rotor Position Estimation of Permanent Magnet Synchronous Motor Based on Hall Installation Deviation

Permanent magnet synchronous motors (PMSM) have the preponderance of high-power density, high reliability and small volume, which are diffusely used in industrial electric vehicle field. Permanent magnet synchronous motor vector control needs correct speed information feedback. Compared to high precision encoders and speed sensorless solutions, PMSM with hall sensors are an optimistic consideration of system cost and control performance. Nevertheless, hall sensors have poor position resolution and are prone to mounting deviations. Aiming at these problems, this paper proposes a position and velocity observer scheme with an adaptive vectorial filter. Simulations verify the estimation accuracy and superiority of the proposed method compared with the previous average velocity method.