LAUSR

To solve the problem that the switched reluctance motor (SRM) may have harmful impact on the shaft during the starting process, a half-S soft starting control method is proposed. The switch signal is given based on the discrete position signal of SRM without the requirement of accurate rotor position information. In the process of the motor from static to rotation, the current step chopping soft starting is adopted to prevent the phase current from flowing; In starting acceleration stage, the edge signal of discrete position is used as the control period. By using sliding mode control, the increment of the rotation speed is identical at each position signal interval. The speed increased exponentially within the rated output power of motor. Through using Matlab/Simulink environment and switched reluctance motor drive platform, this method was validated, and the results reveals that the proposed method is able to achieve smooth starting and reduce the harmful impact on the mechanical system which shows high application value in the development field of SRM type electric vehicle.