Modular lighting control with circulating inductor
US4523129A · kind A · utility
5Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1984 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Apr 3, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention is directed to a circuit and a method for efficiently controlling the output illumination level in gas discharge lighting arrangements. Load side control is provided by a timed interval controlled impedance, serially coupled between the ballast and the lamp(s). A circulating inductor, coupled in parallel with the controlled impedance, provides a current path between the power source and the lamp(s) at least during that portion of the AC waveform where the controlled impedance is in a substantially non-conducting state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.