ELECTRONIC BALLAST WITH STARTLESS PROTECTIVE DEVICE

The utility model relates to an electronic ballast for fluorescent lamp with startless protective device. The startless protective device arranged on the ballast takes pressure from an RLC circuit oscillation inductance L by a coupled mode using a coil and charges up a delaying capacitance after com...

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Bibliographic Details
Main Author LI JIAAI
Format Patent
LanguageEnglish
Published 27.05.1992
Edition5
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Summary:The utility model relates to an electronic ballast for fluorescent lamp with startless protective device. The startless protective device arranged on the ballast takes pressure from an RLC circuit oscillation inductance L by a coupled mode using a coil and charges up a delaying capacitance after compensating, rectifying, partial pressure and sampling. Under the state of lamp startless but electric flux, the charging voltage triggers a toggle circuit by a section of controllable delaying; a one-way controlled silicon is triggered and conducted and fixes the transistor base electrode of two switches to low potential by an on-state valve voltage drop to force the base electrode to end, shut off resonant current and protect the components in the LCRT circuit from the damage of over current for a long time.
Bibliography:Application Number: CN1991221921U