ELECTRONIC BALLAST POSSESSING LAMP NON-STARTING PROTECTION FUNCTION

The utility model relates to a fluorescent lamp electronic ballast possessing lamp non-starting protection function. The lamp non-starting protection device arranged on the ballast uses a sampling resistor to obtain sampling voltage from a main circuit and charge up a delaying capacitance. Under the...

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Bibliographic Details
Main Author LI JIAAI
Format Patent
LanguageEnglish
Published 06.05.1992
Edition5
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Summary:The utility model relates to a fluorescent lamp electronic ballast possessing lamp non-starting protection function. The lamp non-starting protection device arranged on the ballast uses a sampling resistor to obtain sampling voltage from a main circuit and charge up a delaying capacitance. Under the state of lamp non-starting, the charging voltage triggers a one-way static thyristor by a section of controllable delaying. The one-way static thyristor fixes the transistor base electrode of a high potential switch to low potential by an on-state valve voltage drop to force the two switch transistors to end, shut off resonant current and protect the components in the RLC circuit from the damages. The utility model has the advantages of adjustable range of applicable power supply voltage, normal work for ballasts without triggering, non interference, simple structure and easy realization in technology.
Bibliography:Application Number: CN1991221920U