(under subclass 700) Subject matter which includes a field winding of a synchronous motor and an electric circuit connected to the winding.
(1) Note. The circuits of this subclass type include those which energize or control the field winding as by the adjustment, change, or regulation of the direct current winding of the synchronous motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
521+, for motor field secondary circuit control generally.
700+, for synchronous motor systems including both an armature circuit and a field circuit where synchronization of the motor is not claimed.
710+, for synchronous motor synchronization systems which include field winding excitation removal.
712, for synchronous motor synchronization systems which include field winding excitation applications.
