Position sensorless control of IPMSM based on rotating high frequency signal method

This paper proposes a position sensorless control technique for IPMSM using rotating high-frequency voltage signal. In the α-β reference frames, the rotor space saliency position detection is realized by using the position information in expression of the peak high-frequency current responses; tracking the corresponding phase angle of the maximum amplitude of the high-frequency current vector is used to identify the polarity of rotor pole, and therefore a complete model of rotor position observer is built. Based on this, vector control system for IPMSM is constructed, and the signal processing ability when the system is implemented and the dead-time compensation measures are analyzed in this paper and they are verified by simulation and experimental study. It is concluded that the position observer proposed can effectively estimate the rotor position, and that the IPMSM vector control system designed based on this observer has good steady-state and dynamic performance.