Digital generation and control of variable phase-on motor energi

Details Digital generation and control of variable phase-on motor energi Digital generation and control of variable phase-on motor energi

1979-05-14

1981-08-04

Truhe, J. V.

Electricity: motive power systems

Open-loop stepping motor control systems

318138, G05B 1940

Patent

active

042824729

ABSTRACT:
A control system for controlling a motor having a plurality of electromagnetic field windings adapted to be separately energized by switching circuitry to control rotation of a rotor in the motor. Digital circuitry generates a plurality of logic signals, one for each respective motor field winding to cause the switching circuitry to energize the field windings in a two phase on mode, a one phase on mode, or in one of a plurality of fractional phase on modes. A signal command source provides a plurality of digital signals to select or gate the desired phase on energization mode of the field windings in response to a feedback signal derived from detecting rotary movement of the rotor. Related methods of controlling a multi-phase motor with digitally generated variable phase modes are also disclosed.

REFERENCES:
patent: 4093905 (1978-06-01), Von Braun
patent: 4127800 (1978-11-01), Long et al.
patent: 4192131 (1980-03-01), Hosokawa et al.

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