Induction cooking system

Details Induction cooking system Induction cooking system

1979-06-25

1980-12-23

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 1077, 363131, 363 97, 323 22T, 307253, H05B 608, H02M 7537

Patent

active

042412501

ABSTRACT:
An induction cooking system comprises at least one induction surface unit which includes an induction coil operatively positioned adjacent to a metallic, food-containing utensil. A switching means is coupled in series with the coil across a source of rectified AC and is rendered conductive at a prescribed rate to energize the coil, causing the coil to generate magnetic flux which, in turn, causes eddy currents to be circulated in the utensil surface. The circulating eddy currents in the utensil surface result in joule losses causing food heating. Reactive energy present in the induction coil during intervals when the switching means is non-conductive is stored in a reactive power converter for subsequent discharge across the source of rectified AC. Selectively discharging the reactive power converter during the valleys of the AC input wave to the induction coil allows the coil to be energized during the entire 360.degree. of the AC input wave, thus realizing an efficient induction cooking system.

REFERENCES:
patent: 3733540 (1973-05-01), Hawkins
patent: 3930193 (1975-12-01), Kornrumpf et al.
patent: 4115676 (1978-09-01), Higuchi et al.

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