Pulse frequency modulation control for a heater

Details Pulse frequency modulation control for a heater Pulse frequency modulation control for a heater

1985-05-20

1986-08-05

Paschall, M. H.

Electric heating

Heating devices

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

219501, 219497, 323235, H05B 102

Patent

active

046045171

ABSTRACT:
A microcomputer is programmed to respond to the zero crossings of an AC power source to trigger a uniform pulse pattern of an integral number of AC cycles as the AC excitation to a heater element to maintain the temperature of the heater element essentially constant.

REFERENCES:
patent: 4233498 (1980-11-01), Payne et al.
patent: 4340807 (1982-07-01), Raskin et al.
patent: 4377739 (1983-03-01), Eckert, Jr. et al.
patent: 4400613 (1983-08-01), Popelish
patent: 4404461 (1983-09-01), Sitek et al.

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