Electronic thermostat

Details Electronic thermostat Electronic thermostat

1976-12-13

1978-10-10

Truhe, J. V.

Electric heating

Heating devices

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

323 19, 323 40, H05B 102

Patent

active

041198352

ABSTRACT:
A method and device for controlling the power supplied to an a.c. powered load by zero-passage switching.
A ripple voltage which is superimposed on the control voltage synchronizes the start of a sawtooth voltage in a small range on both sides of the zero passage of the power-supply sinewave for the load.
The device is employed in electric heating systems.

REFERENCES:
patent: 3381226 (1968-04-01), Jones et al.
patent: 3443121 (1969-05-01), Weisbrod
patent: 3553429 (1971-01-01), Nelson et al.
patent: 3935482 (1976-01-01), Fox et al.

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