US PATENT SUBCLASS 388 / 801
.~ Field control, or field and armature control, by digital or combined analog and digital circuitry


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}
801.~ Field control, or field and armature control, by digital or combined analog and digital circuitry


DEFINITION

Classification: 388/801

Field control, or field and armature control, by digital or combined analog and digital circuitry:

(under subclass 800) Subject matter in which regulation of the running speed of the motor is effected by digital, or a combination of analog and digital, circuitry which controls the energizing of, (1) a field winding of the motor, or (2) both a field winding and an armature winding.

(1) Note. See the Glossary in the class definition for the terms "digital" and "analog".

SEE OR SEARCH THIS CLASS, SUBCLASS:

803+, for analog (only) closed loop running speed control of field windings or of both field and armature windings.

809+, for digital or combined analog and digital closed loop running speed control systems which control an armature winding only.