Circuit arrangement
US7486028B2 · kind B2 · utility
8Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2002 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Jul 31, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast arrangement is provided for igniting and operating a discharge lamp. The lamp is connected in a commutating bridge in series with an inductor and parallel to a capacitor. The inductor and the capacitor together form a resonance circuit. During ignition, the bridge is commutated at a comparatively high frequency that changes with respect to time. The series resonance circuit has a resonance frequency that is close to an odd harmonic of the comparatively high frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.