H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/26
H05B 6/06 (2006.01) B29C 35/08 (2006.01) B29C 70/80 (2006.01) H05B 6/02 (2006.01) H05B 6/36 (2006.01) B29C 33/02 (2006.01) B29C 33/36 (2006.01) B29C 47/00 (2006.01)
Patent
CA 1126345
ABSTRACT OF THE DISCLOSURE A high frequency induction heating circuit for heating a plurality of articles where the induction heating circuit includes a semiconductor oscillator circuit having a series resonance circuit including a heating coil and a condensor, the induction heat- ing circuit having a detection circuit, for detect- ing impedance and frequency variations in the heat- ing coil, and a current control circuit responsive to the detection circuit for controlling a current sup- ply to the heating coil. The current control cir- cuit includes a variable control gain regulation apparatus whereby control gain of the surrent cont- rol circuit may be varied such that the current supplied to the heating coil becomes a nonconstant current control which is varied depending on the number of articles supplied to the heating coil.
335199
Osler Hoskin & Harcourt Llp
Toyo Seikan Kaisha Ltd.
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