Title:
UNINTERRUPTIBLE POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/003991
Kind Code:
A1
Abstract:
In the event of power interruption of a commercial AC power source (6), this uninterruptible power supply device: controls a bidirectional chopper (2) such that a DC voltage (VD) between DC lines (L1, L3) becomes a second reference voltage (VDR 2) higher than a first reference voltage (VDR 1) for a prescribed time (Tc); and then controls the bidirectional chopper (2) such that the DC voltage becomes the first reference voltage. Accordingly, during power interruption, a battery current (IB) can be temporarily increased above usual, and even when a small-sized capacitor (C1 to C4) is used, it is possible to prevent the DC voltage from dropping below a lower limit voltage (VDL).
Inventors:
MURATA RYO (JP)
Application Number:
PCT/JP2022/025595
Publication Date:
January 04, 2024
Filing Date:
June 27, 2022
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02J9/06
Domestic Patent References:
| WO2019180784A1 | 2019-09-26 | |||
| WO2021255788A1 | 2021-12-23 | |||
| WO2020026430A1 | 2020-02-06 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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