| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an inverter for electromagnetic induction heating capable of constituting a circuit without a current transformer or a current detection circuit which does not generate an interference sound when simultaneously heating different kinds of pans among a magnetic pan, non-magnetic stainless-steel pan and non-magnetic pans, and electromagnetic cooking device. <P>SOLUTION: The inverter for electromagnetic induction heating has a plurality of heating circuits including inverters 601, 602 and a heating coil 213 which heats a metal load by electromagnetic induction and comprises a current detection circuit for detecting current which flows through the heating coil 213 and an inverter controlling means 109 for setting operation frequency of the plurality of heating circuits to be spaced at least 10kHz in accordance with the detected current when each of the plurality of heating circuits heats the different metal loads. The current detection circuit includes a sense IGBT built in IGBT 601, 602 of the inverter and sense resistances 603, 604 and detects power voltage which is generated by current. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
