Abstract:
This paper describes the vibration analysis of DSP based sensorless SRM drive used for Electric vehicles (EVs). The vibration signals of the motor are measured using National instrument (NI) vibration sensor to 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 reported and comparative analysis between constant and variable turn off angle control are given. The algorithm has been implemented in real time by using TMS320F2812 DSP controller and tested with different experimental conditions on 1 hp,8/6 SRM drive. A test results are proving that the 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.
