Process controller including power level control and method of o

Details Process controller including power level control and method of o Process controller including power level control and method of o

1989-09-07

1991-04-09

Paschall, M. H.

Electric heating

Heating devices

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

219501, 219508, 219497, 323236, H05B 102

Patent

active

050066951

ABSTRACT:
An apparatus for controlling a heating element for heating a substance in accordance with a maximum power which is to be applied to the heating element and in accordance with a selected temperature to which the substance is to be heated is used in combination with a temperature sensing probe for sensing the temperature of the substance heated by the heating element. The apparatus includes first circuitry for generating a first control signal which is a function of the difference between the selected temperature and the sensed temperature and second circuitry for generating a second control signal which is a function of the maximum power. The apparatus also includes a relay for providing power to the heating element and circuitry responsive to the first and second control signals for selectively applying power provided by the relay to the heating element whereby the amount of power applied to the heating element is reduced as the substance approaches the selected temperature thereby avoiding overheating the substance to a temperature significantly above the selected temperature.

REFERENCES:
patent: 3050611 (1962-08-01), Kamide
patent: 3541429 (1970-11-01), Martin
patent: 3878358 (1975-04-01), Barton et al.
patent: 4256951 (1981-03-01), Payne et al.
patent: 4323763 (1982-04-01), Goldsmith
patent: 4338769 (1982-07-01), Jones
patent: 4495405 (1985-01-01), Foster
patent: 4496829 (1985-01-01), Black et al.
patent: 4506144 (1985-03-01), Hesford et al.
patent: 4594501 (1986-06-01), Culley et al.
patent: 4614860 (1986-09-01), Kutivois
patent: 4730101 (1988-03-01), Mahon et al.
patent: 4745262 (1988-05-01), Larsen
patent: 4777350 (1988-10-01), Crockett et al.
patent: 4894520 (1990-01-01), Moran

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