Lamp arrangement employing a resonant circuit formed from an autotransformer and a capacitor where the capacitor is switched out of the resonant circuit and into a power factor correcting circuit when the ignition of the lamp is sensed
US5289084A · kind A · utility
11Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Jun 26, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved fluorescent ballast circuit for 277 volt commercial application is disclosed utilizing a resonant circuit mechanism to generate high open circuit voltage (OCV) during lamp starting. The result is an energy efficient effective lighting system for commercial buildings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.