Power supply system having improved input power factor
US4831508A · kind A · utility
83Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Oct 20, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit and method using a low frequency active switch for improving input power factor in power supplies utilizing a full wave rectifier and capacitor filter for supplying a filtered DC voltage from an AC power source. A switch control activates and deactivates an active switching once in each half cycle of the alternating voltage input. The switch control is connected to the active switching for operating the circuit providing high power factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.