New digital simulation technique for a current-source inverter fed synchronous motor. I

The naturally commutated current-fed synchronous motor has attained a major part in various industrial applications as a variable speed drive because of its simplicity and improved dynamic behavior. The commutation in the inverter bridge by using the induced back EMF of the armature windings, and therefore no forced commutation devices are required, which leads to lower costs. An accurate digital simulation technique is presented for this system. This technique is capable of predicting both transient and steady-state performance for a salient pole synchronous motor fed from a naturally commutated current source inverter. The effect of the presence of damper windings on machine performance is investigated