| 摘要 |
PROBLEM TO BE SOLVED: To provide an induction heating device capable of carrying out induction heating of a heated object with a simple structure by resonance circuits having intrinsic resonance points, respectively. SOLUTION: The device is provided with a plurality of resonance circuits containing heating coils LA, LB, LC fitted in opposition to a heated object, and each resonance circuit has an intrinsic resonance point. Moreover, the device is provided with a sweep oscillating circuit 31 sweep-oscillating signals in a frequency range containing all resonance points, and a control circuit 34 supplying signals of frequencies in accordance with required resonance characteristics from the sweep oscillating circuit 31 to each resonance circuit, then the heated object is put under induction heating at any resonance point. COPYRIGHT: (C)2009,JPO&INPIT
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