Overview of Sensorless Zero-Low Speed Range Control Technology based on High-Frequency Signal Injection for SPMSM

: For the sensorless position control technology of surface permanent magnet synchronous motor (SPMSM) under the operation modes of zero and low speed, this paper introduced several typical control algorithms detecting rotor position of PMSM, and analyzed the working principle and the rotor position estimation deviation control process of these types of algorithms, as well as their advantages and disadvantages in detail. Finally, the applicability of these algorithms in SPMSM at present were further compared and summarized, so as to achieve better control effect.