US PATENT SUBCLASS 388 / 806
.~.~ By voltage or current modification

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


388 /   HD   ELECTRICITY: MOTOR CONTROL SYSTEMS

800  DF  CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {4}
803  DF  .~ Field control, or field and armature control, by analog (only) circuitry {4}
806.~.~ By voltage or current modification {1}
807  DF  .~.~.~> With variable impedance

DEFINITION

Classification: 388/806

By voltage or current modification:

(under subclass 803) Subject matter wherein the control circuit functions by determining the voltage or current relationship between a reference signal and a feedback signal and by applying an adjustment, based on this relationship, to the motor input.