Power supply device
US8593838B2 · kind B2 · utility
3Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2010 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Feb 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply device for intrinsically safe power supply of an intrinsically safe load circuit includes a voltage source, a power-limiting circuit including at least two controllable semiconductor devices, a current-limiting circuit including at least one resistor, and a load circuit connector connected to the load circuit. The power-limiting circuit and the current-limiting circuit are active between the voltage source and the load circuit connector. The resistor includes a resistance value that suffices to limit a short circuit current to a current without danger of a spark ignition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.