Title :
A single-stage electronic ballast with emergency lighting features
Author :
Chen, Y.K. ; Wu, Y.-C. ; Wu, T.-F. ; Wu, Y.-E.
Author_Institution :
Dept. of Aeronaut. Eng., Nat. Huwei Inst. of Technol., Yunlin, Taiwan
Abstract :
This paper presents a single-stage electronic ballast with emergency lighting features. The ballast can function as a regular ballast, emergency ballast, battery charger or discharger and power failure detector, achieving regular and emergency lighting features. The single-stage converter used in the ballast is an integration of a bidirectional flyback converter and two half-bridge series-resonant parallel-loaded inverters. Derivation and operating principle of the proposed converter is 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. Simulation results and hardware measurements have verified its feasibility and the desired features.
Keywords :
battery chargers; bridge circuits; convertors; detector circuits; emergency lighting; lamp accessories; microcontrollers; resonant invertors; EM78P458; battery charger; battery discharger; bidirectional flyback converter integration; converter operating principle; emergency ballast; emergency lighting features; half-bridge series-resonant parallel-loaded inverter; hardware measurement; power failure detector; regular ballast; regular lighting feature; single-chip microcontroller; single-stage converter; single-stage electronic ballast; Batteries; Bidirectional control; Circuits; Costs; Electronic ballasts; Emergency lighting; Fabrication; Lamps; Microcontrollers; Switches;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-7768-0
DOI :
10.1109/APEC.2003.1179366