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Title:
SWITCHING POWER SUPPLY APPARATUS, AND POWER SUPPLY SYSTEM AND ELECTRONIC APPARATUS USING SAME
Document Type and Number:
WIPO Patent Application WO/2011/161728
Kind Code:
A1
Abstract:
A switching power supply apparatus with a small loss is provided, by enabling a switching element with low withstanding voltage to be applied thereto, through reduction of surge voltage to be generated at the switching element. The switching power supply apparatus is provided with: a DC-AC conversion circuit for converting DC voltage into AC voltage; a rectifier circuit for rectifying the AC voltage outputted by the DC-AC conversion circuit; a smoothing circuit for smoothing the output voltage of the rectifier circuit into direct current; and an auxiliary circuit to be connected parallel to the rectifier circuit. The auxiliary circuit is comprised of a serial connection of a voltage source, an auxiliary inductor, and auxiliary switching elements.

Inventors:
OKUBO, Toshikazu (HITACHI LTD., 1-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
大久保敏一 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社 日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
SHOJI, Hiroyuki (HITACHI LTD., 1-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
庄司浩幸 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社 日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
YAMAMURA, Hideho (HITACHI LTD., 1, Horiyamashita, Hadano-sh, Kanagawa 92, 〒2591392, JP)
Application Number:
JP2010/004220
Publication Date:
December 29, 2011
Filing Date:
June 25, 2010
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
株式会社 日立製作所 (〒80 東京都千代田区丸の内一丁目6番6号 Tokyo, 〒1008280, JP)
OKUBO, Toshikazu (HITACHI LTD., 1-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
大久保敏一 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社 日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
SHOJI, Hiroyuki (HITACHI LTD., 1-1, Omika-cho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
庄司浩幸 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社 日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
International Classes:
H02M3/28
Attorney, Agent or Firm:
INOUE, Manabu (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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Claims: