Balanced operation of three phase synchronous motors connected to a single phase supply

Balanced operation of three phase synchronous motors has been dealt with extensively in the literature. However, unbalanced operation has not received as much attention. One of the interesting unbalance modes of these motors is their operation from a single phase supply. In this paper, the possibility of operating three phase synchronous motors from a single phase supply through the use of a two element-phase balancer is explored. The values of the reactances of the phase balancer to cause complete balance, together with their variations with load have been presented. Furthermore, the paper includes two methods to obtain positive as well as negative sequence impedances of the motor