Title:
UNINTERRUPTED POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/094093
Kind Code:
A9
Abstract:
When three-phase AC voltages (Vi1-Vi3) from a commercial AC power supply (51) become abnormal, a control circuit (6) of an uninterrupted power supply device applies an off-command signal to first to third switches (1a-1c) and allows first to third power converters (2a-2c) to output first to third DC currents, respectively, to quickly turn off the first to third switches (1a-1c). In this case, the polarities of the first to third DC currents are the same as the polarities of currents (Is1-Is3) flowing through the first to third switches (1a-1c), respectively, and the sum of the values of the first to third DC currents is zero.
Inventors:
NAKANO TOSHIHIDE (JP)
OOURA YOUSUKE (JP)
OOURA YOUSUKE (JP)
Application Number:
PCT/JP2015/083682
Publication Date:
April 12, 2018
Filing Date:
December 01, 2015
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02J9/06
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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