Torque ripple suppression of switched reluctance motor using overlap angle adaptive TSF control
As the traditional torque distribution function control of switched reluctance motor is easy to produce large torque ripple in the switching region, this paper proposes a new torque sharing function control method with adaptive overlap angle.According to the inductance characteristics, the two-phase switching is divided into small inductance region and inductance change rate abrupt region.In the small inductance region, more torque is allocated to the demagnetizing phase, and in the abrupt region, more torque is allocated to the exciting phase to improve the torque tracking performance.Then, GA-BP is employed to optimize the parameters of the torque sharing function in each interval to improve the torque tracking performance.To reduce the influence of current change rate during phase commutation, the change of overlapping angle is realized according to different speed and load.Finally, to verify the effectiveness of the control strategy, a 6/20 three-phase SRM is employed for simulation.Our results show compared with the traditional exponential torque distribution function control, the torque ripple of the motor is further reduced under different working conditions, the peak current is decreased and the efficiency of the motor is improved.
switched reluctance motortorque sharing function controladaptive overlap angletorque ripple
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