Research on transient behavior of SRM as its phase windings are broken

This paper studies the transient behavior of switched reluctance motor (SRM) as its phase windings are broken. At first, this paper established a nonlinear dynamic model of SRM and simulated SRM's dynamic performance. The dynamic model and the simulation results were tested and verified by comparing the simulated results with the experiment results. On the basis of these, this paper analyzed the transient behavior of SRM as its one phase windings or two phase windings are broken. By these analyses, it can be concluded that SRM'S torque pulsation and speed fluctuation will enhance evidently as the phase windings are broken, and the speed of SRM will bring down rapidly which may spoil the windings and the switching devices if the load torque is larger than the electric-magnetic torque.