Variable control circuit having a timed bypass

Details Variable control circuit having a timed bypass Variable control circuit having a timed bypass

1980-10-24

1982-09-21

Dobeck, B.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318806, 318812, 318475, 98121A, H02P 540

Patent

active

043509444

ABSTRACT:
A switch, that appears the same as an ordinary snap switch, is shown with a positive ON and a positive OFF with a variable control circuit therebetween. The variable control circuit includes a triac gated through a diac to give an infinite control range that depends upon the point at which the triac is triggered. In using the variable control circuit of the switch, a shunt or a bypass is provided for the gate of the triac through a full wave bridge rectifier circuit for a predetermined time interval. The time interval is determined by an RC time constant connected across the bridge. Therefore, for the aforementioned predetermined time interval, essentially a full wave AC voltage is passed through the triac to a load. For motors, this allows the motor to come up to speed prior to subsequently reducing the speed of the motor by the variable control circuit after the predetermined time interval.

REFERENCES:
patent: 3389315 (1968-06-01), Andreas et al.
patent: 3541412 (1970-11-01), Worth
patent: 3949347 (1976-04-01), Gilbreath
patent: 3990033 (1976-11-01), Wall
patent: 4085399 (1978-04-01), Wall
patent: 4117445 (1978-09-01), Foreman et al.

Affiliated with

Also associated with

Rating

Variable control circuit having a timed bypass does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable control circuit having a timed bypass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable control circuit having a timed bypass will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2078146