Title :
A new proposal of soft-commutated power oscillator that can be applied as an electronic ballast for fluorescent lamps
Author :
Vicenzi, F.R.S. ; Gomes de Freitas, Luiz Carlos ; Silva, E. P da ; Coelho, E.A.A. ; Vieira, J.B. ; Farias, V.J. ; De Freitas, L. C Gomes
Author_Institution :
Faculdade de Engenharia Eletrica, Univ. Fed. de Uberlandia, Minas Gerais, Brazil
Abstract :
A new switched power oscillator with reduced conduction losses, zero voltage and zero current turning on, and zero voltage turning off is presented in this paper. The proposed topology consists on a half-bridge converter associated to a self-oscillating LC series resonant circuit. This new power oscillator can be applied as an electronic ballast for fluorescent lamps as well as an auxiliary medium open loop power supply. Circuit description, a simplified design guide line, mathematical analysis and simulation results are presented in this paper. Experimental results from a 100 Watts, 150 Volts input voltage laboratory prototype switching at 13.5 kHz are included.
Keywords :
bridge circuits; commutation; fluorescent lamps; heat losses; lamp accessories; mathematical analysis; oscillators; power supplies to apparatus; resonant power convertors; switching convertors; 100 W; 13.5 kHz; 150 V; auxiliary medium open loop power supply; conduction losses; converter topology; design guide line; electronic ballast; fluorescent lamps; half-bridge converter; mathematical analysis; self-oscillating LC series resonant circuit; soft-commutated switched power oscillator; zero current turning on; zero voltage turning off; zero voltage turning on; Circuit topology; Electronic ballasts; Fluorescent lamps; Mathematical analysis; Power supplies; Proposals; RLC circuits; Turning; Voltage-controlled oscillators; Zero voltage switching;
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.2003.1179367
