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Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/136280
Kind Code:
A1
Abstract:
The disclosed power conversion device (140) is provided with: an inverter circuit (12) which has bridge-connected power semiconductor elements and is connected to a DC power source via a contactor which can be opened and closed; a driver circuit (21) which drives the power semiconductor elements; a driver circuit control unit (18) which controls the driver circuit by PWM (pulse width modulation) and performs switching of the power semiconductor elements; a voltage smoothing capacitor (500) connected in parallel to the input side of the inverter circuit; a driver power circuit (27) which, connected in parallel to the voltage smoothing capacitor, inputs the voltage applied to said voltage smoothing capacitor and feeds power to the driver circuit; a discharge circuit which, comprising a resistance (25) for discharging charges of the voltage smoothing capacitor and a discharge switching element (26) connected in series to said resistance, is connected in parallel to the voltage smoothing capacitor; and a discharge control unit (24) which, when the contactor is set to an open state, allows current to flow to the discharge switching element and performs discharge from the discharge circuit.

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Inventors:
YAHATA KOICHI (JP)
FUNABA SEIJI (JP)
TSUJI MASASHIGE (JP)
Application Number:
PCT/JP2011/060286
Publication Date:
November 03, 2011
Filing Date:
April 27, 2011
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
YAHATA KOICHI (JP)
FUNABA SEIJI (JP)
TSUJI MASASHIGE (JP)
International Classes:
H02M7/48
Foreign References:
JPS6277887A1987-04-10
JP2001037239A2001-02-09
JP2009247185A2009-10-22
JP2005229689A2005-08-25
JP2006042459A2006-02-09
JP2000316283A2000-11-14
JP2006042459A2006-02-09
Other References:
See also references of EP 2566032A4
Attorney, Agent or Firm:
NAGAI, Fuyuki (JP)
Fuyuki Nagai (JP)
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Claims:



 
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