Abstract
In this paper, a model of harmonic currentthird harmonic electromagnetic force-vibration is proposed aiming at the problem of weakening the vibration of switched reluctance motor (SRM). The model shows the relationship among the second harmonic component of current, the third-order radial electromagnetic force and the vibration mode of the switched reluctance motor. Based on the model and via theoretical research, it is found that reducing the second harmonic component of current can reduce the third-order radial electromagnetic force, and then the second-order mode and the fourth-order mode of the motor is reduced, so the aim of reducing motor vibration can be completed. In order to reduce the second harmonic component of the phase current, the method of reducing the turn-on angle of the diode is adopted in this paper. This method can effectively change the phase current waveform, and then weaken the vibration of the switched reluctance motor. In addition, the harmonic current-third harmonic electromagnetic force-vibration model studies are performed by theoretical and experimental methods, and numerical calculation and experimental results verified the accuracy of the model.
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