Current limiting control circuit for induction range

Details Current limiting control circuit for induction range Current limiting control circuit for induction range

1983-08-11

1986-01-14

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1049R, 219486, 307 41, 307141, 3071418, 361 89, 361 94, H05B 606

Patent

active

045647330

ABSTRACT:
The provision in a range having an electrically energizable heating unit and a control for selectively causing energization of the heating unit from a power supply of an improved circuit for causing time-delayed initiation of energization of the heating unit for a period of time which is a function of the period of inrush current which occurs when the heating unit is energized. The circuit causes such a delay in the event the circuit senses a preselected power delivery from the power supply at the time of attempted initiation of energization of the heating unit. The novel circuit is advantageously utilized in a range having a plurality of electrically energizable heating units and assures that the heating units will be sequentially energized with a time delay between initiation of energization of each so that the total inrush current is substantially less than the sum of all of the inrush currents of the heating units concurrently attempted to be energized.

REFERENCES:
patent: 3457430 (1969-07-01), Samuelson
patent: 3506907 (1970-04-01), Porterfield et al.
patent: 3770977 (1983-11-01), McIntosh
patent: 3925633 (1975-12-01), Partridge
patent: 4112287 (1978-09-01), Oates et al.
patent: 4115677 (1978-09-01), Yamamura et al.
patent: 4138607 (1979-02-01), Engelmann
patent: 4227062 (1980-10-01), Payne et al.
patent: 4242554 (1980-12-01), Hurko et al.
patent: 4313061 (1982-01-01), Thomas

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