| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an output from being interrupted by the protection function of a voltage boosting converter during a temporary overload, and ensuring the maximum output within the capacity range of a power source. <P>SOLUTION: A bidirectional DC-DC converter (the voltage boosting converter) 4 is provided, and boosts a DC supplied from a battery 5. The boosted DC is converted into an AC by an inverter 3, and outputted to a load. A load current Iddc is detected by a current detector 15, and inputted to an output limitation quantity determining section 16. An output voltage value for starting a limitation of an output from the inverter is determined by the determining section 16 in response to the distance of the load current Iddc from a limitation starting current value Ia to a limited current value Ib. An inverter driver 17 implements a switching operation of an FET in the inverter 3, and limits the output in accordance with the output voltage value. If the temporary overload is eliminated, the output recovers the maximum value. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
