Temperature control system with simplified controller and power

Details Temperature control system with simplified controller and power Temperature control system with simplified controller and power

1983-04-25

1987-02-17

Paschall, M. H.

Electric heating

Heating devices

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

219497, 204 1T, 323245, 330 75, 330103, H05B 102

Patent

active

046441387

ABSTRACT:
The invention includes a simple and inexpensive thermal controller and simple and inexpensive radio frequency alternating current generator which are provided in an improved temperature control system for a resistively heated electrochemical cell. The temperature controller is formed by a single amplifier with feedback circuit which provides the function of a combined deviation amplifier and two mode (percent proportional band and integral functions) controller. The alternating current generator uses a single direct current voltage source to generate a radio frequency alternating electric current. The two elements are combined in a temperature control circuit for a resistively heated electrochemical cell. The control circuit provides an alternating current with varying power by cyclicly shutting the current off for irregular portions of a predetermined cycle period.

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