High intensity discharge lamp with current sense resistor
US7211965B2 · kind B2 · utility
1Cited by
13References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2004 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Nov 10, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for operating a high intensity discharge (HID) lamp includes an H-bridge connected between a common terminal and a power line, and a control circuit connected to the H-bridge. The control circuit includes a transformer having a primary winding connected between the common terminal and a power terminal and a secondary winding connected between the common terminal and the power line, and a current sense resistor connected in series between the secondary winding and the common terminal. The HID lamp is connected to the common terminal and to the second winding so as sense a current across the current sense resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.