Power control device for a resistance heater in an oven

Details Power control device for a resistance heater in an oven Power control device for a resistance heater in an oven

1986-05-01

1988-01-19

Paschall, M. H.

Electric heating

Heating devices

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

219501, 219496, 219505, 323236, H05B 102

Patent

active

047206233

ABSTRACT:
A power control device for controlling power to a resistance heater in an oven uses a microprocessor, temperature measuring circuit, power measuring circuit, a triac circuit for firing the heater, a power phase synchronizer whereby the microprocessor synchronizes A.C. current signal and allows the triac to fire for a calculated portion of each phase of A.C. current to provide power to the heater such that the oven temperature is accurately controlled. A cooling device for cooling to subambient temperature such as -150.degree. C. also is provided. The power control device and oven are used in conjunction with instruments such as a dynamic mechanical analyzer so that physical data on test samples can be obtained over a wide temperature range.

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