US PATENT SUBCLASS 388 / 800
CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR

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

800CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {4}
801  DF  .~> Field control, or field and armature control, by digital or combined analog and digital circuitry
803  DF  .~> Field control, or field and armature control, by analog (only) circuitry {4}
809  DF  .~> Armature control by digital or combined analog and digital circuitry {5}
816  DF  .~> Analog armature control {6}

DEFINITION

Classification: 388/800

CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR:

(under the class definition) Subject matter wherein a signal proportional to the running speed of a DC commutating motor (i.e., a feedback signal) is used to regulate the input to the motor to maintain a constant running speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825+, for open loop (i.e., without feedback) speed control systems for commutating DC motors.

SEE OR SEARCH CLASS

318, Electricity: Motive Power Systems,

59+, and 66+ for speed control in plural, diverse, or diversely controlled DC motors; subclasses 772+, 799+ and 823+ for speed control in AC Induction motors; and subclasses 138 and 254 for speed control in brushless (i.e., noncommutating) motors.