Position and Speed Observer for IPMSM with Hall Effect Sensors based on Extended EMF

Permanent magnet synchronous motor (PMSM) is widely used in industrial fields such as AC speed regulation and servo drive due to its advantages of small size, high power density, and easy maintenance. Accurate rotor position and speed information play a crucial role in vector control. Compared with sensorless control and high-precision encoder control of PMSM, the Hall sensor is a guarantee of low cost and control performance. However, low-resolution Hall sensors reduce the accuracy of position and speed estimation in vector control systems. Therefore, this paper proposes a rotor position and speed estimation method of IPMSM with Hall sensors based on an extended electromotive force (EMF). The proposed method has high dynamic performance. Simulation results verify the effectiveness of the proposed scheme.