Static Characteristic and Vibration Dynamic Response Analysis of Switched Reluctance Motor System

In this paper, 2D finite element method is used to calculate the static characteristics of switched reluctance motor, such as the electromagnetic normal force, flux-linkage and torque-angle-current characteristics. The system model is build to study the vibration dynamic response which is excited by electromagnetic force. Because vibration is a major problem of switched reluctance motor drive system, which can cause undesirable acoustic noise and acoustic noise is severe when the periodic excitation frequency of normal force near the natural vibration frequency of the stack. So, it is very important for calculating the periodic excitation frequency to avoid the resonant vibration. The electromagnetic normal force is calculated and applied to the motor system, and FFT is used to analyse the dynamic vibration response of the switched reluctance motor drive system. In the end, a prototype motor is build and the numerical analysis is applied to a four phase 8/6 poles switched reluctance motor to obtain the key frequency 7450Hz of the acceleration response.