US PATENT SUBCLASS 388 / 830
.~ Analog armature control

Current as of: June, 1999
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388 /   HD   ELECTRICITY: MOTOR CONTROL SYSTEMS

825  DF  OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {3}
830.~ Analog armature control {7}
831  DF  .~.~> By pulse width or duty cycle modification
832  DF  .~.~> By frequency modification
833  DF  .~.~> By voltage or current modification
834  DF  .~.~> By selection of windings
835  DF  .~.~> By control of motor structure {1}
837  DF  .~.~> By periodic mechanical switch
838  DF  .~.~> With plural selectable speeds (e.g., with manual switch, potentiometer {1}

DEFINITION

Classification: 388/830

Analog armature control:

(under subclass 825) Subject matter in which the regulation of the running speed of the motor is effected by analog (only) circuitry which controls the energization of an armature winding only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

826+, for analog open loop running speed control systems which control a field winding or both a field and an armature winding.