| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an induction heating control means hardly causing an error in heating electric power even in response to a characteristic change due to temperature rise of a load or the like. Ž<P>SOLUTION: The induction heating control means includes: a resonance circuit including an induction heating coil 5 and a resonance capacitor 3; a high frequency inverter 10 including a switching element 4 for supplying a high frequency current to the resonance circuit; and a DC rectification circuit 2 for converting an AC input voltage to a DC voltage. The high frequency inverter 10 is operated intermittently by duty control. An electric power correction coefficient at the ON-time in a next cycle is calculated based on present input voltage and input current within ON-time in one cycle in the intermittent operation, and an electric power is corrected by using the electric power correction coefficient at the ON-time in the next cycle to perform feedback control of the high frequency inverter 10. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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