High-Frequency Voltage Injection Based Sensorless Control Strategy for Single DC-Link Shunt PMSM Drives

Due to the time-sampling error from current reconstruction using a single DC-link shunt, there are periodic ripples in the rotor position estimated by using the high-frequency voltage injection sensorless control strategy. In this paper, a current error compensation method is proposed to suppress the rotor estimated position error of permanent magnet synchronous motor drives. The experimental results show the effectiveness of the proposed method in different operation conditions.