High intensity discharge lamp ballast having a transient protected power factor correction scheme
US5453666A · kind A · utility
4Cited by
3References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/25
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast for lighting a high intensity discharge lamp having a power factor correction scheme. The power factor correction scheme includes a triac. To prevent the triac from damage when the lamp is not lit and power line transients are present, the triac is turned ON. The triac is also turned ON whenever the lamp is lit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.