Title:
UNINTERRUPTIBLE POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/105172
Kind Code:
A1
Abstract:
In an uninterruptible power supply device, a converter (1) is controlled in an inverter power supply mode and a bypass power supply mode so that the voltage (VDC) between the terminals of a capacitor (Cd) is at a first reference voltage (VDCr1). During a switching period for switching between the inverter power supply mode and the bypass power supply mode, the converter is controlled so that the voltage between the terminals of the capacitor is at a second reference voltage (VDCr2) that is higher than the first reference voltage, whereby a circulation current (IC) is prevented from flowing in a path that includes the capacitor, etc.
Inventors:
ABE SHOICHI (JP)
Application Number:
PCT/JP2018/043195
Publication Date:
May 28, 2020
Filing Date:
November 22, 2018
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02J9/06
Domestic Patent References:
| WO2017017719A1 | 2017-02-02 | |||
| WO2016203635A1 | 2016-12-22 |
Foreign References:
| JPS6450725A | 1989-02-27 | |||
| JPH114544A | 1999-01-06 | |||
| JP2013230028A | 2013-11-07 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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