Auxiliary power supply control
US5949154A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1996 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Nov 15, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit is provided for an auxiliary power supply in an apparatus having run and standby modes of operation. The auxiliary power supply is energized by raw B.sup.+ voltage and operates in a switched mode, responsive to a feedback signal indicative of loading. A switching circuit, also energized by the raw B.sup.+ voltage, changes the auxiliary power supply between operational and non operational modes responsive to an on/off signal. The on/off signal is indicative of the run and standby modes of operation of the apparatus, for example a run supply voltage generated by another power supply in the apparatus. The switching circuit includes a switch optically coupled to a voltage threshold detector. The switch interrupts the feedback signal, for example by shunting to ground, in a manner which inhibits operation of the switching controller during the standby mode of operation of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.