Voltage Command Derivation for PWM Controller to Reduce Torque Ripple in Switched Reluctance Motor

The output torque of switched reluctance motor (SRM) can be controlled by flowing an appropriate current through the armature windings. In general, current hysteresis control has been applied. However, there is a problem that acoustic noise generated from the SRM at the driving tends to become large. Then, there are reports that PWM control has been applied to suppress the acoustic noise. This paper proposes a method to obtain the voltage command used in PWM control in order to flow the desired current to the motor winding by use of electromagnetic field analysis software. In this paper, it is clarified by simulation and experiment that the torque ripple can be reduced by inputting an appropriate voltage command into the PWM controller. In addition, it is clarified that the proposed control method improves the efficiency and suppresses the acoustic noise.