Fast torque control of wound field synchronous machines for start-stop systems

This paper presents fast torque control of wound field synchronous machines (WFSMs) at start up via single step optimization. Transient torque response of WFSMs is affected by both of armature current and field current. Since dynamic responses (or time constant) of armature and field current are different due to winding turn ratio between armature and field, optimization of fast transient torque response of WFSMs is not simple. In certain circumstance, such as start-up operation, fast torque response is required. In this paper, a single-step optimization method is proposed to achieve simple real time implementation and fast and stable transient dynamics of WFSM drives. Simulation results for the single- step optimization method for WFSM drive are presented.