Steady-state analysis of the variable-speed switched-reluctance motor drive

The principle of operation of the switched-reluctance motor (SRM) drive demands that the motor and converter be treated as one unit. Little has been done to develop a complete analysis of this motor-converter combination. The authors present an approach to the steady-state analysis of the drive including the effects of stator winding resistance, input filter parameters, and snubber circuits, which are often neglected. The analysis yields current, voltage, torque, and back-EMF (electromotive force) waveforms that provide guidelines to the optimal design of the drive. Experimental verification is provided for a 6/4 pole prototype SRM drive, and it is shown to be in good agreement with the simulation results. It is noted that this approach can be applied to any other motor-converter combination with minimal modification