H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/19, 327/26
H05B 6/12 (2006.01) H05B 6/06 (2006.01)
Patent
CA 1148618
ABSTRACT OF THE DISCLOSURE An induction heating apparatus for cooking use is disclosed, which has a flat supporting plate made of non-magnetic material on which an object such as a pan to be heated is placed, an induction heat- ing coil located underneath the supporting plate which will generate magnetic flux when it is energized to heat the pan by eddy current loss generated in the pan,a signal generator having a switching device for switching a recti- fied DC signal from an AC signal and for generating a signal supplied to the induction heating coil, a drive signal generator for generating a drive signal for the switching device, a gating circuit connected between the drive signal generator and the switching device for gating the drive signal, a detecting circuit for detecting whether the object placed on the supporting plate is made of magnetic material or not and for generating an output, a search pulse generator controlled by the output of the detecting circuit and for generating a search pulse controlling the gating circuit, a load detecting circuit for detecting the load for the signal generator and gene- rating an output controlling the gating circuit together with the search pulse, and a periodic signal generator controlled by the output of the load detecting circuit and for generating a periodic signal supplied to the search pulse generator, whereby the search pulse generator generates the search pulse at the rate corresponding to the frequency of the periodic signal. -2-
361451
Ikeda Tamon
Kanazawa Kenichi
Gowling Lafleur Henderson Llp
Sony Corporation
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