超低速永磁同步电机转速控制策略

iming at the speed control problem of ultra-low speed permanent magnet synchronous motor direct drive, this paper studies the realization method of ultra-low speed smooth operation. Due to the contradiction between the accuracy and timeliness of feedback speed calculation at ultra-low speed, according to the mechanical equation of permanent magnet synchronous motor, this paper uses Luenberger observer to estimate the feedback speed in real time, and compares the result with difference method. The influence of disturbance factors on the actual speed fluctuation of ultra-low spSpeed control strategy of ultra-low speed permanent magnet synchronous motoreed permanent magnet synchronous motor system is analyzed, and the parameter tuning of Luenberger observer is realized. The effects of speed setting compensation and current setting compensation on speed fluctuation suppression are compared, and the compensation coefficients of speed setting and current setting introduced by Luenberger observer are determined respectively. The effectiveness of the above method and the feasibility of parameter tuning are verified by simulation.