Lamp driving device having impedance component detecting abnormal discharge
US7439689B2 · kind B2 · utility
5Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2006 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Sep 15, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2855
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one aspect, an impedance component which exhibits a high impedance in a high frequency region is arranged on a high pressure line formed on a secondary side of a transformer. The potential difference generated at both ends of the impedance component is used to detect an abnormal electrical discharge generated in the high pressure line. When the abnormal electrical discharge is detected, a switching operation is stopped by a controlling circuit, whereby a protection operation is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.