Back EMF sampling circuit for phase locked loop motor control

Details Back EMF sampling circuit for phase locked loop motor control Back EMF sampling circuit for phase locked loop motor control

1988-11-14

1990-05-22

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318721, H02R 602

Patent

active

049280430

ABSTRACT:
A sensorless control for DC permanent magnet brushless motor includes a feedback loop connected between the motor stator windings and the inverter which controls the timer at which current is provided to the various windings in sequence. The control of the invention includes a voltage sensing network for sensing the back EMF on each motor winding when it is unenergized and comparing this voltage with a null point. For maximum torque this voltage has an optimum value and variation from this value produces an error signal which is integrated to produce a VCO drive signal. This signal controls the frequency of a VCO which in turn controls the switching times of the inverter.

REFERENCES:
patent: 4275343 (1981-06-01), Fulton et al.
patent: 4455513 (1984-06-01), Fulton et al.
patent: 4513230 (1985-04-01), Erdman
patent: 4642537 (1987-02-01), Young
patent: 4673849 (1987-06-01), Sears et al.
patent: 4743815 (1988-05-01), Gee et al.
patent: 4757241 (1988-07-01), Young

Affiliated with

Also associated with

Rating

Back EMF sampling circuit for phase locked loop motor control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Back EMF sampling circuit for phase locked loop motor control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Back EMF sampling circuit for phase locked loop motor control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2136739