Vibration analysis of variable speed switched reluctance motor for electric vehicles [articol]

Abstract

This paper describes the vibration analysis of DSP based sensorless Switched Reluctance Motor drive used for Electric vehicles (EVs). The vibration of the motor is measured with help of National instrument (NI) vibration sensor suite under different load conditions. A higher order time domain analysis and FFT spectrum of measured vibration signals are also presented. To demonstrate the effectiveness of the randomized turn off angle generation in sensorless control, the vibration, torque and speed results are compared and analyzed with conventional Proportional-Integral (PI) controller with constant turn off angle control. The algorithm has been implemented using TMS320F2812 DSP controller and tested with 1 hp,8/6 SR motor. A experimental results prove that the proposed randomized turn off angle method increases the performance of sensorless control system in terms of less speed oscillation, less torque ripples and less vibration even low speed in steady state condition than the constant off angle methods.