Electronic fluorescent lamp ballast

Details Electronic fluorescent lamp ballast Electronic fluorescent lamp ballast

1980-05-30

1983-03-01

Dixon, Harold A.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315209R, 315287, 315DIG7, G05F 100

Patent

active

043756085

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.

REFERENCES:
patent: 3482145 (1969-12-01), Powell
patent: 3889153 (1975-06-01), Pierce
patent: 4004185 (1977-01-01), Edmondson et al.
patent: 4005335 (1977-01-01), Perper
patent: 4066930 (1978-01-01), Summa
patent: 4121136 (1978-10-01), Fournier et al.
patent: 4256992 (1981-03-01), Luursema
patent: 4266165 (1981-05-01), Handler

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