Power supply switching circuit
US4841160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Dec 1, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The subject invention is a power supply having an input for receiving a power signal, a DC storage device connected to the input, a primary output connected to the DC storage device and connectable to a battery, a DC to DC converter for converting the voltage at the DC storage device to an auxiliary DC voltage, the converter having a supply voltage input, and a switching circuit. The switching circuit includes first, second and third switches. The first switch is responsive to the power signal for providing the DC storage device voltage to the converter supply voltage input. The second switch is responsive to the voltage on the battery for providing the DC storage device voltage to the converter supply voltage input. The third switch is responsive to an auxiliary voltage on/off signal for overriding the second swtich.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.