Control of AC power to inductive loads

Details Control of AC power to inductive loads Control of AC power to inductive loads

1984-01-19

1996-05-21

Wong, Peter S.

Electricity: power supply or regulation systems

External or operator controlled

Zero switching

323236, 323239, 323245, 323324, 315194, G05F 1445

Patent

active

055193110

ABSTRACT:
A control system is provided for controlling the average power from an alternating voltage source (AC) to a load having inductive properties. The system uses a synchronous switch shunted by a capacitor connected between the source (generator) and sink (load) to pulse duration modulate the AC voltage carrier wave. A control signal generator circuit drives the synchronous switch such that the switch is closed at a variable time early in each half-wave of the AC voltage source carrier wave and such that the switch is opened at a subsequent later, variable time during that half-wave. This is accomplished by sensing the voltage across the synchronous switch in order to inhibit closing of the switch early in the half-wave until the synchronous switch voltage (and thus the voltage on the capacitor) is substantially zero and then opening the synchronous switch at a point in time to give the desired volt-second area between closure and opening within each half-wave.

REFERENCES:
patent: 3201597 (1965-08-01), Balan
patent: 3679932 (1972-07-01), Murphy
patent: 4302717 (1981-11-01), Olla
patent: 4447765 (1984-05-01), Cote
patent: 4507569 (1985-03-01), Hess

Affiliated with

Also associated with

Rating

Control of AC power to inductive loads does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control of AC power to inductive loads, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control of AC power to inductive loads will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2040664