Rotor Position Estimation Error Analysis of Indirect High Frequency Signal Injection Method for Sensorless Starting Control of Aircraft Starter-Generator

This paper introduced an indirect high frequency signal injection (IHFSI) method of rotor position estimation for three-stage brushless synchronous machine (TSBSM). Since the resulting high frequency signal flows through the nonlinear rotary rectifier, and the band-pass filer(BPF) and low-pass filter(LPF) should be employed for the response signals extraction, the influence of these involved links on rotor position estimation error is investigated, the compensation for the signal estimation is proposed to reduce the error for the higher starting performance. The simulation and experiment results demonstrate the effectiveness of the reduction of the estimated rotor position error compared to the original method in the starting procedure.