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Title:
VOLTAGE-CONTROLLING DEVICE AND METHOD FOR CONTROLLING VOLTAGE
Document Type and Number:
WIPO Patent Application WO/2015/174551
Kind Code:
A1
Abstract:
　The present invention is provided with: a capacitor (5) for supplying electrical power to a PM motor (4); a PM inverter (13) connected to the PM motor (4); a voltage converter (8) including a transformer-coupled booster that outputs, to the PM inverter (13), a direct current voltage that was a boosted capacitor voltage of the capacitor (5); and a voltage converter-controlling unit (25) that generates and outputs a variable command value for the direct current voltage corresponding to the capacitor voltage of a predetermined range within a range that is less than an upper predetermined voltage and at or above a lower predetermined voltage of the direct current voltage, when the PM motor (4) is being driven and the output of the transformer-coupled booster is less than a predetermined output, which is a value that is less than the output limit of the transformer-coupled booster. It is thereby possible to obtain an output that corresponds to load fluctuations of the PM motor (4) using the transformer-coupled booster.

Inventors:
SAGAWA TOMOHIKO (JP)
YOSHIDA TETSUO (JP)
Application Number:
PCT/JP2015/065675
Publication Date:
November 19, 2015
Filing Date:
May 29, 2015
Export Citation:
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Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
E02F9/20; H02P29/00
Domestic Patent References:
WO2008099884A12008-08-21
WO2008111649A12008-09-18
WO2008123368A12008-10-16
WO2008117748A12008-10-02
Foreign References:
JP2001028900A2001-01-30
JP2015006037A2015-01-08
US20090207636A12009-08-20
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
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