Title:
UNINTERRUPTIBLE POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/213183
Kind Code:
A1
Abstract:
An uninterruptible power supply device that comprises an input line into which alternating-current power is inputted from an alternating-current power supply that has a grounded neutral point, a converter that converts the alternating-current power of the input line to direct-current power and outputs the direct-current power to an intermediate line, a power storage unit that is connected to the intermediate line, an inverter that converts the direct-current power of the intermediate line to alternating-current power and outputs the alternating-current power to an output line, a grounding capacitor that is connected between the input line and ground, a phase voltage detection unit that detects the phase voltage between the input line and ground, and a control unit that, by monitoring changes in the phase voltage detected by the phase voltage detection unit, detects failures that cause abnormal current to flow through the input line.
Inventors:
OKI SHOTA (JP)
KIMIZU TAKUYA (JP)
KIMIZU TAKUYA (JP)
Application Number:
PCT/JP2019/030906
Publication Date:
October 22, 2020
Filing Date:
August 06, 2019
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
H02H3/16; H02J9/06
Foreign References:
| JPH0898536A | 1996-04-12 | |||
| JP2010148259A | 2010-07-01 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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