Steady state efficiency of a synchronous reluctance drive

The performance of a synchronous reluctance drive can be optimised with regard to such parameters as power factor and transient response (or rate of change of torque). Constant current in inductive axis control yields the best transient response and is often termed vector control. A number of control schemes have been proposed and research effort has neglected to consider the effect of these schemes on such parameters as steady state losses and low speed torque ripple. This paper derives empirical models to give an insight into how these parameters are affected by the choice of scheme