Repetition rate power control for appliance using high current i

Details Repetition rate power control for appliance using high current i Repetition rate power control for appliance using high current i

1979-02-01

1981-03-17

Goldberg, Elliot A.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219486, 219508, 219506, 340711, 307 38, 307 40, 323319, H05B 102

Patent

active

042569516

ABSTRACT:
A power control system is disclosed for controlling the power output of a resistive heater element in response to operator selected power level settings by varying the rate at which a power pulse of constant duration is applied to the element. The system includes circuitry for generating a control signal representing a selected power output for the element, circuitry for identifying recurring patterns of a binary counter, the patterns recurring at different rates, and a logic arrangement for uniquely associating each of the patterns with a selected power setting. The binary counter and the power pulse control are synchronized with the power supply to trigger a power switching device at or near zero crossovers of the supply.

REFERENCES:
patent: 3878358 (1975-04-01), Baston et al.
patent: 3912905 (1975-10-01), Giler
patent: 4010412 (1977-03-01), Forman
patent: 4046991 (1977-09-01), Sefton et al.
patent: 4078168 (1978-03-01), Kelly
patent: 4135122 (1979-01-01), Holmquist et al.

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