Electronic fluorescent lamp ballast
US4375608A · kind A · utility
15Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 1980 |
| Grant date | Mar 1, 1983 |
| Priority date | — |
| Expiry date | May 30, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic ballast-inverter for multiple fluorescent lamps employs a push-pull inverter and a series resonant circuit for driving the lamps. The inverter operates at the resonant frequency of the series resonant circuit. The current in the resonant circuit is limited, for low load conditions, in response to a sensing voltage which is used to raise the frequency of operation of the inverter to make the load more reactive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.