Sensorless Vector Control of A PMSM Based on High-frequency Signal Injection Method

摘要

Vector control is generally applied on the high performance control of permanent magnet synchronous motors (PMSM) and is proved to be an effective technique.The rotor position which is essential to this method is usually measured by an additional sensor.In this paper,a space vector control without mechanical sensor is presented.The rotor position is estimated by high-frequency signal injection scheme based on magnetic saliency of the PMSM.Experiments are also implemented and the results verify the effectiveness of this sensorless space vector control approach.