Solid state electronic ballast

Details Solid state electronic ballast Solid state electronic ballast

H - Electricity

05

B

315/37

H05B 41/16 (2006.01)

Patent

CA 2025988

ABSTRACT The electronic ballast for a fluorescent lamp replaces the three main components of a traditional fluorescent lamp ballast, namely th ferro-magnetic ballast, the power factor condenser, the starter and starter holder. The solid state electronic ballast of the invention comprises a power supply conversion circuit, a start-up circuit and a switching resonant circuit. The power supply conversion circuit consists of a common mode line filter connected with a rectifier bridge circuit and a low harmonic filter. Connected in series follows the start-up circuit with a sawtooth oscillator, a diac trigger and a first transistor. A second transistor forms together with an inductor, a transformer, and a lamp-load the resonant- circuit. The electronic ballast of the invention safes costs, energy and weight. (Fig. 7)

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