Thyristor control system

Electricity: motive power systems – Motor-reversing – Armature or primary circuit control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

318230, 318231, 318314, H02P 540

Patent

active

039462935

ABSTRACT:
An induction motor is coupled to a three-phase AC source through thyristors controlled by a digital control circuit. An adjustable device gates a selected number of clock pulses to a control counter. As one of the AC phases goes positive, the control counter is incremented or decremented by clock pulses until reaching a predetermined count, which causes a trigger means to generate a trigger pulse and fire a thyristor. The trigger pulse also gates clock pulses to a second control counter which counts to 120.degree. and 240.degree. representing numbers in order to fire the other thyristors. In a speed feedback embodiment, rotation of the motor generates a motor feedback signal which is compared with a desired speed signal to adjust the count of an up/down counter, the contents of which are loaded into the control counter.

REFERENCES:
patent: 3470447 (1969-09-01), Gyugyi et al.
patent: 3665273 (1972-05-01), Enslin
patent: 3703672 (1972-11-01), Bird et al.
patent: 3816808 (1974-06-01), Enslin et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Thyristor control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thyristor control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thyristor control system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1645595

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.