DC backup power supply device and method for diagnosing the same
US7245469B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 14, 2003 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jul 10, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reliable uninterruptible DC power supply device. The DC backup power supply device includes an AC/DC converter, a DC/DC converter, voltage step-up/down choppers and a battery connected to a DC path of a main circuit connected with a load via a switch, and a microcomputer. In the device, under control of the microcomputer, the voltage step-up/down choppers are first operated under a condition that the MOS FET was turned OFF for self diagnosis of the backup power supply device. Next, the switch is turned ON to execute the remaining self diagnosis. The DC backup power supply device can execute its self diagnosis with a reduced likelihood of danger of exerting an adverse effect on the main circuit and also can exhibit a reliable uninterruptible power supply function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.