Circuit representation of inverter-fed synchronous motors

A study of the prediction of commutation time of current in inverter-fed synchronous motor drives is presented. The natural commutation from one thyristor to the next is brought about by the machine voltage, and performance is commonly expressed in terms of a commutating reactance, x_c. The commutation behavior of solid salient poles is explored in terms of the magnetic structure of the motor. It is shown that the behavior can be closely modeled using a circuit-solving computer package, SPICE