Regulator circuit for control of heat output of a heating elemen

Details Regulator circuit for control of heat output of a heating elemen Regulator circuit for control of heat output of a heating elemen

1984-02-13

1986-12-16

Paschall, M. H.

Electric heating

Heating devices

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

219492, 323236, 340589, 99325, 99328, H05B 102

Patent

active

046298525

ABSTRACT:
A regulator circuit for controlling the heat output of a heating element adapted to be switched on and off by a semiconductor switch energized by a zero crossing switch having cycle group control, whereby a sensor signal derived from the sensed temperature is supplied to the zero crossing switch. In order to avoid an overriding of the control or operating temperature in the heating phase and to improve the accuracy of the temperature control, a secondary control voltage is derived from the sensor voltage according to the rate of rise and drop of the sensor voltage which in the heat phase the switch-off of the heating element is reset to lower temperatures depending on the secondary control voltage and in the cooling phase the switch-on of the heating element is reset to higher temperatures depending on the secondary control voltage.

REFERENCES:
patent: 3584208 (1971-06-01), Slawson et al.
patent: 4088871 (1978-05-01), Coulmance et al.
patent: 4337388 (1982-06-01), July
patent: 4338511 (1982-07-01), Six
patent: 4362924 (1982-12-01), Story et al.
patent: 4378486 (1983-03-01), Yunik et al.
Industrie-Elektrik und Elektronic, German, 8/1975, pp. 156/160, vol. 20.

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