Uninterruptible power supply device
US10756567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2015 |
| Grant date | Aug 25, 2020 |
| Priority date | — |
| Expiry date | Sep 26, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
When an abnormality occurs in a first voltage detector (4a), a control circuit (7) in an uninterruptible power supply device controls an inverter (3) in synchronization with an output signal (VI2D) from a second voltage detector (4b) to match a phase of a two-phase AC voltage (VO1, VO2) output from the inverter (3) with a phase of a two-phase AC voltage (VI1, VI2) supplied from a commercial AC power supply (51), and then turns on a semiconductor switch pair (S9, S10) and a bypass switch pair (S7, S8). Accordingly, even when an abnormality occurs in the first voltage detector (4a), the two-phase AC voltage can be supplied to a load (53) without instantaneous interruption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.