Power supply device preventing inrush current
US6934141B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Apr 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/542
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply device 3 including: a current source 31 for supplying current to a load circuit 4 which operates on the supplied current, and a power switch unit 32 between the current source 31 and the load circuit 4 to control passage of current, wherein: the power switch unit 32 includes a switching element 323 connected in parallel with the open-close element 321, a power supply controller 33 including an open-close element controller 31 which controls operation of the open-close element 321 and a switching element controller 332 which controls operation of the switching element 323, and a voltage detector 34 which detects terminal voltage of the load circuit 4; and the power switch unit 32 turns on the switching element before supplying current to the load circuit and closes the open-close element when the terminal voltage of the load circuit becomes almost equal to supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.