H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/19
H05B 6/08 (2006.01) H02M 7/537 (2006.01) H05B 6/06 (2006.01)
Patent
CA 1147400
RD-11100 ABSTRACT OF THE DISCLOSURE An induction cooking system includes at least one induction surface unit which has an induction coil. A switching transistor 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 within the surface of a metallic, food- containing utensil positioned adjacent to the coil. 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 transistor is non-conductive is stored in a capacitor for subsequent discharge across the source of rectified AC. Selectively discharging the capacitor during the valleys of the rectified AC wave supplied to the induction coil allows the coil to be energized during the entire 360° of the rectified AC wave, thus realizing an efficient induction cooking system.
354013
Company General Electric
Eckersley Raymond A.
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