Method of controlling a multiphase power factor correction stage, a power factor correction stage and a controller therefor
US8441822B2 · kind B2 · utility
7Cited by
5References
11Claims
0Family size
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Key dates
| Filing date | Jul 1, 2010 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In order to improve the efficiency of a Power Factor Convertor (PFC) first stage to a AC-DC converter the switching cell is split into two smaller ones (each comprising a switched inductor with an output diode). Below a certain load only one cell is active. The second cell only becomes active, out of phase with the first, but not generally in antiphase, after a predefined load level is surpassed in such a way that above that level the first cell has a fixed on time and the second cell a variable one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.