Circuit for starting power source apparatus
US6980446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2003 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Feb 10, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
When an AC power source (1) is turned on, energy is accumulated in a backup capacitor (63) by an energy supply circuit (64). An internal power source (65) supplies the energy accumulated in the capacitor (63) to a control unit (49). Thus, a power factor improvement circuit (40-2) operates. When the power factor improvement circuit (40-2) operates to output a predetermined voltage, an output voltage detection circuit (67) detects the voltage, and switches the internal power source (66) on. The turned on internal power source (66) supplies the energy in the capacitor (63) to a control unit (56) to operate a DC/DC conversion circuit (50). In this way, by operating the DC/DC conversion circuit (50) after operating the power factor improvement circuit (40-2), the capacity of the capacitor (63) can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.