US 8,541,989 B2Granted

Power supply apparatus

AssigneeMitsubishi Electric Corporation

InventorsTakahiro Urakabe, Tatsuya Okuda, Akihiko Iwata, Hirotoshi Maekawa, Masaru Kobayashi, Matahiko Ikeda, Yoshikazu Tsunoda, Kazutoshi Kaneyuki, Yuya Tanaka

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Abstract

A power supply apparatus includes: an AC generator including an AC generating section, and a rectifier for rectifying an AC voltage generated in the AC generating section, and outputting a DC voltage; and a DC/DC converter for converting the output voltage of the rectifier into a DC voltage having a different voltage value, wherein the output voltage of the rectifier is set to be larger than the output voltage of the DC/DC converter in accordance with the rotation speed of the AC generating section and the amount of power supply to an electrical load connected to the DC/DC converter, and is stepped down and outputted by using the DC/DC converter. The power supply apparatus is capable of increasing an output power efficiently.

Claims17

Dependent claims

A power supply apparatus comprising:

an AC generator including
an AC generating section, and
a rectifier for rectifying an AC voltage generated in the AC generating section into a DC voltage, and outputting the DC voltage;
and
a DC/DC converter for converting the DC voltage outputted by the rectifier into a DC voltage having a voltage value different from that of the DC voltage outputted by the rectifier, and outputting the DC voltage that has been converted,
wherein the DC/DC converter performs a step-down operation for stepping down the output voltage of the AC generator and performs a shorting operation for shorting the output of the AC generator and the output of the DC/DC converter,
wherein, the step-down operation and the shorting operation of the DC/DC converter are switched in accordance with the rotation speed of the AC generating section and the amount of power supply to an electrical load connected to the DC/DC converter.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/003,841Filed 15 Jul 2009
Priority: JP 2008-18545017 Jul 2008
Published: US 2011/0181250 A128 Jul 2011
Granted: 24 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H02P 9/48
Arrangements for controlling electric generators for the purpose of obtaining a desired output: arrangements for obtaining a constant output value…
H02J 7/1492
Regulation of the charging current or voltage otherwise than by variation of field: by means of controlling devices between the generator output…
H02P 2101/45
Special adaptation of control arrangements for generators: for motor vehicles, e.g. car alternators

Family

US 2011/0181250 A1Pre-grant publication · published 28 Jul 2011
US 8,541,989 B2This patent

From the US filing history. Foreign family members aren’t listed.

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