High-speed DTP-PMSM Flying Start Based on Nonlinear Flux Observer

In order to improve the accuracy and smoothness of the initial position estimation of high-speed flight starting of a dual three-phase permanent magnet synchronous motor based on virtual resistance. In this paper, a nonlinear magnetic chain observer with speed re-projection structure incorporating virtual resistors is proposed, which utilizes the dual winding current difference to compensate the current error in the observer and incorporates a filter to eliminate the high-frequency noise and improve the signal-to-noise ratio of the current over a wide speed range. The method is validated by simulation on a 10kW DTP-PMSM machine.