US PATENT SUBCLASS 388 / 816
.~ Analog armature control

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

800  DF  CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {4}
816.~ Analog armature control {6}
819  DF  .~.~> By pulse width or duty cycle modification
820  DF  .~.~> By phase or frequency modification
821  DF  .~.~> By voltage and current modification
822  DF  .~.~> By voltage modification
823  DF  .~.~> By current modification
824  DF  .~.~> By variable impedance (e.g., potentiometer)

DEFINITION

Classification: 388/816

Analog armature control:

(under subclass 800) Subject matter in which 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:

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