.~ With excitation winding and/or circuit control {11}
71
.~.~ Variable length field winding
DEFINITION
Classification: 322/71
(under subclass 59) Subject matter wherein the generator excitation is controlled by varying the length of the field windings.
(1) Note. The variation in length of the field winding is usually attained by providing the field winding with taps.
SEE OR SEARCH THIS CLASS, SUBCLASS:
49, for generator control systems under subclass 44 where the control of the generator is effected by controlling the structure of the magnetic circuit of the generator.
SEE OR SEARCH CLASS
310, Electrical Generator or Motor Structure,
189, for dynamoelectric machine structure having the field or excitation windings adjustable as to effective length, as by taps. 318, Electricity: Motive Power Systems,
235, for induction motor secondary circuit control having variable number of effective conductors or turns, and subclass 531, for motor control by variable length field winding.
