AC-EXCITED GENERATOR/MOTOR APPARATUS

摘要

An AC-excited generator/motor apparatus comprising an AC-excited generator/motor having an armature mounting thereon an armature winding connected to an AC power system and a rotor mounting thereon an exciting winding excited by an AC current; exciting means for supplying a controlled AC exciting current to the exciting winding; means for calculating a real slip frequency based on a difference between the phase of an armature voltage appearing on the armature winding and the rotational phase of the rotor; and means for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies so as to restore the real slip frequency within the allowable range of slip frequencies.