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A Three-in-One Converter for Regular and Emergency Lighting Applications

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2 Author(s)
Yung-Chun Wu ; Dept. of Aeronaut. Eng., Nat. Formosa Univ., Huwei ; Yu-Kai Chen

This paper presents a three-in-one converter for regular and emergency lighting applications. The converter can function as regular ballast, emergency ballast, and battery charger/discharger, achieving regular and emergency lighting features. The three-in-one converter used in the ballast is an integration of a bidirectional flyback converter and two half-bridge series-resonant parallel-loaded inverters. The derivation and operating principle of the proposed converter are first presented, and an application to regular and emergency lighting is then developed. With the proposed converter and a single-chip microcontroller EM78P458, a low cost multifeature electronic ballast can be readily implemented and installed. Hardware measurements have verified its feasibility and the desired features.

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Industry Applications, IEEE Transactions on  (Volume:45 ,  Issue: 1 )