Abstract
Aiming at the integral drift and saturation problems of the traditional voltage model flux observer, an improved rotor flux observation scheme is proposed. A programmable low-pass filter is used to replace the pure integrator, and the flux error before the filter is corrected. The sliding mode speed controller is used to replace the traditional PI speed controller. The proposed observer can reduce the speed response overshoot of the system at medium and high speed range, reduce the steady-state time, and improve the load capacity and robustness of the system. The simulation results show the effectiveness of the algorithm.
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