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Patent Searching and Data


Title:
POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/011879
Kind Code:
A1
Abstract:
DC power supplies (10a, 10b) are electrically connected to smoothing capacitors (Ca, Cb) by way of first and second relays (12a, 12b), respectively. A current limiting circuit (13) is connected to in parallel to the first relay (12a), but not provided for the second relay (12b). At the startup of a power supply system (5), the smoothing capacitor (Ca) is precharged with a current passing through a current limiting resistor (15) with the first and second relays (12a, 12b) turned off and a third relay (14) turned on. After the completion of precharge of the smoothing capacitor (Ca), the smoothing capacitor (Cb) is precharged with a current from the DC power supply (10a) accompanied by periodic on/off control of switching elements (S1-S4) with the first relay (12a) turned on and the second relay (12b) and the third relay (14) turned off.

Inventors:
ISHIGAKI MASANORI (JP)
TOMURA SHUJI (JP)
YANAGIZAWA NAOKI (JP)
OKAMURA MASAKI (JP)
Application Number:
PCT/JP2014/003542
Publication Date:
January 29, 2015
Filing Date:
July 03, 2014
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
International Classes:
H02M1/36; H02M3/158
Domestic Patent References:
WO2012039131A22012-03-29
Foreign References:
US20080310198A12008-12-18
EP0748035A11996-12-11
US20070290658A12007-12-20
JP2012070514A2012-04-05
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (2-7 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, JP)
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