Power unit

Details Power unit Power unit

2005-09-15

2010-11-09

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

C363S056050

Reexamination Certificate

active

07830680

ABSTRACT:
The invention makes it possible to secure a maximum output within the capacity range of an electrical power source by preventing an output from being cut by a protective function of a converter at the time of a temporary overload. A bidirectional DC-DC converter4for stepping up a voltage of DC power supplied from a battery5is provided. A stepped-up DC power is converted to an AC power by an inverter3-2via a regulator3-1and is outputted to the load side. An input voltage V1of the regulator3-1is detected by a voltage detecting portion15and is inputted into an output limit determining portion16. The output limit determining portion16determines an output voltage value for starting to limit an inverter output according to a distance from when the input voltage V1fell below a limit starting voltage value Vlim to a limit voltage value Va. An inverter driving portion17limits an output by switching FETs in the inverter3in accordance with this output voltage value. When a temporary overload is eliminated, then the output recovers to a maximum value.

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Translation of International Preliminary Report on Patentability mailed Apr. 12, 2007 of International Application No. PCT/JP2005/017017.
International Search Report of PCT/JP2005/017017, date of mailing Nov. 15, 2005.

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