Power factor control for switched mode rectifiers
US5687070A · kind A · utility
19Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Oct 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power factor correction system with an EMI input filter includes circuitry to sense the capacitor current of the filter to improve the accuracy of the power factor enhancement by providing a split current sensing resistor connected to the EMI filter or a voltage sensing capacitor. Both arrangements may be tightly coupled to the current control loop of the power factor control and compensate for the unsensed current in the EMI filter capacitors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.