Systems for wound field synchronous machines with zero speed rotor position detection during start for motoring and improved transient response for generation

摘要

An electrical machine (100) includes a stator (102) having a main armature winding (104), an exciter field winding (105), and a transformer primary winding (106). A rotor (108) is operatively connected to rotate relative to the stator (102), wherein the rotor (108) includes an exciter armature winding (107) operatively connected to the exciter field winding (105) for field excitation therebetween, a main field winding (109) operatively connected to the main armature winding (104) for field excitation therebetween, and a transformer secondary winding (110) operatively connected to the transformer primary winding (106) to form a rotating transformer. A generator control unit (112) is operatively connected to the main armature winding (104), exciter field winding (105), and transformer primary winding (106) to control the main armature (104) and exciter field windings (105) based on excitation in the primary winding (106) received from the transformer secondary winding (110).