US PATENT SUBCLASS 388 / 825
OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR

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

825OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {3}
826  DF  .~> Field control, or field and armature control {1}
828  DF  .~> Armature control by digital or combined analog and digital circuitry {1}
830  DF  .~> Analog armature control {7}

DEFINITION

Classification: 388/825

OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR:

(under the class definition) Subject matter wherein a derived reference signal is applied to the input circuit of a commutating DC electric motor to regulate the running speed of the motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

800+, for closed loop 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.