Three phase AC motor controller

Details Three phase AC motor controller Three phase AC motor controller

1981-06-30

1984-03-20

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Reversing

318763, H02P 320

Patent

active

044383827

ABSTRACT:
A motor controller for a three phase AC motor (10) which is adapted to operate bidirectionally from signals received either from a computer (30) or a manual control (32). The controller is comprised of digital logic circuit means which implement a forward and reverse command signal channel (27, 29) for the application of power through the forward and reverse power switching relays (16, 18, 20, 22). The digital logic elements are cross coupled to prevent activation of both channels simultaneously and each includes a plugging circuit (65, 67) for stopping the motor upon the removal of control signal applied to one of the two channels (27, 29) for a direction of rotation desired. Each plugging circuit (65, 67) includes a one-shot pulse signal generator (88, 102) which outputs a single pulse signal of predetermined pulsewidth which is adapted to inhibit further operation of the application of power in the channel which is being activated and to apply a reversal command signal to the other channel which provides a reversed phase application of power to the motor for a period defined by the pulse-width output of the one-shot signal generator to plug the motor (10) which will then be inoperative until another rotational command signal is applied to either of the two channels.

REFERENCES:
patent: 3541418 (1970-11-01), Agin et al.
patent: 3568020 (1971-03-01), Lisi
patent: 3612972 (1971-10-01), Konig
patent: 3781621 (1973-12-01), Blackburn
patent: 4088938 (1978-09-01), Baker
patent: 4290000 (1981-09-01), Sun
Murphy; J. M. D., Thyristor Control of AC Motors, Pergamon Press, 1973, pp. 54-158.

Affiliated with

Also associated with

Rating

Three phase AC motor controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Three phase AC motor controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three phase AC motor controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1606669