Auxiliary circuit for power factor corrector having self-power supplying and zero current detection mechanisms
US6847195B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2002 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Mar 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/70
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention is to provide an auxiliary circuit for power factor corrector (PFC) having self-power supplying and zero current detection (ZCD) mechanisms, which comprises a filter capacitor electrically coupled to a secondary winding of an inductor of the auxiliary circuit installed in a power supply and two resistors respectively coupled the positive and negative terminals of the filter capacitor in series with a ZCD pin of a PFC. Such that the secondary winding can be shared by the ZCD and the power supply pins of the PFC to eliminate a necessity of providing an additional ZCD winding and reduce the complexity of circuitry, the manufacturing cost, and a size of power supply without sacrificing power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.