US PATENT SUBCLASS 318 / 719
.~.~.~ Speed responsive field power sources

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

700  DF  SYNCHRONOUS MOTOR SYSTEMS {7}
716  DF  .~ Field winding circuits {1}
717  DF  .~.~ Responsive to a motor condition {2}
719.~.~.~ Speed responsive field power sources

DEFINITION

Classification: 318/719

Speed responsive field power sources:

(under subclass 717) Subject matter wherein the electric circuit connected to the field winding includes direct current power sources whose power is dependent upon the speed of the synchronous motor rotor.

(1) Note. The direct current sources of this subclass type include, for example, DC generators and AC to DC converters.

SEE OR SEARCH THIS CLASS, SUBCLASS:

464, for motor control generally responsive to an electric generator tachometer responsive to the speed of the motor.