| 摘要 |
PROBLEM TO BE SOLVED: To stabilize an output current of a resonance type inverter under an influence of mutual induction. SOLUTION: For the output current control device 230, a current deviation calculating part 240 finds a deviation valueΔi<SB>1</SB>between an output current of a first inverter 204 and a preset current by an output current setting unit 242, and an induction voltage calculating part 238 calculates an induction voltageωMi<SB>2</SB>by an output current of a second inverter detected by a current detector 322. A target input voltage calculating part 236 calculates a target input direct current voltage V<SB>DC1</SB><SP>*</SP>where theΔi<SB>1</SB>becomes zero fromΔi<SB>1</SB>,ωMi<SB>2</SB>, and an input direct current voltage V<SB>DC1</SB>, and send it to a target direct current calculating part 234. The target direct current calculating part 234 finds a target direct current I<SB>DC1</SB><SP>*</SP>which can obtain V<SB>DC1</SB><SP>*</SP>and inputs it into a chopper control part 232. The chopper control part 232 finds a duty ratio (a conduction ratio) of a first chopper circuit 210 which can obtain I<SB>DC1</SB><SP>*</SP>to control the first chopper circuit 210. COPYRIGHT: (C)2004,JPO
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