| 摘要 |
PROBLEM TO BE SOLVED: To achieve easy formation of a temperature distribution and a temperature gradient of an object to be heated, which has been difficult so far, in an induction heating system. SOLUTION: There are provided a plurality of work coils 40a, 40b divided into zones for induction-heating the object to be heated, a power supply 20 for high frequency induction heating to supply power to the work coils 40a, 40b, and a control means 30 for individually controlling power supplied to the work coils 40a, 40b from the power supply 20. The control means 30 comprises: a plurality of impedance matching circuits 32a, 32b provided to correspond to the work coils 40a, 40b; and a time-division control means 31 for supplying power from the power supply 20 to the work coils 40a, 40b on a time-division basis via the respective matching circuits corresponding to the work coils 40a, 40b. The time-division control means 31 is made up of: a matching circuit switching device 35 for switching the plurality of matching circuits 32a, 32b; and a dime-division oscillation control circuit 34 for switching the switching device 35 in synchronization with the frequency of the power supply 20. COPYRIGHT: (C)2005,JPO&NCIPI
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