Electronic ballast-inverter for multiple fluorescent lamps
US4259614A · kind A · utility
50Cited by
5References
10Claims
0Family size
Inventor
Key dates
| Filing date | Jul 20, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Jul 20, 1999 |
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. Current in the resonant circuit is limited, for low-load conditions, in response to a sensing voltage which is used to lower the frequency of operation of the inverter, to make the load more reactive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.