Title :
A new proposal of switched power oscillator applied as a self-oscillating auxiliary medium open loop power supply
Author :
Gomes de Freitas, Luiz Carlos ; Coelho, E.A.A. ; Vieira, J.B., Jr. ; Farias, V.J. ; De Freitas, L. C Gomes
Author_Institution :
Faculdade de Engenharia Eletrica, Univ. Fed. de Uberlandia, Brazil
Abstract :
A new proposal of 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 of a boost EIE converter operating in continuous conduction mode (CCM) associated to a self-oscillating LC series resonant circuit. This new self-oscillating power oscillator can be applied as an inverter stage of electronic ballast for fluorescent lamps as well as medium open loop power supply. Circuit description and a simplified design guide line are presented. A power oscillator prototype applied as a self-oscillating auxiliary medium open loop power supply with an output power of 15.7 W has been built and analyzed by simulation and experimentally.
Keywords :
fluorescent lamps; invertors; lamp accessories; losses; oscillators; power supplies to apparatus; switching convertors; 15.7 W; boost EIE converter; continuous conduction mode; electronic ballast; fluorescent lamps; inverter stage; medium open loop power supply; reduced conduction losses; self-oscillating LC series resonant circuit; self-oscillating auxiliary medium open loop power supply; self-oscillating power oscillator; switched power oscillator; zero current turning on; zero voltage turning on; Circuit topology; Electronic ballasts; Fluorescent lamps; Inverters; Power supplies; Proposals; RLC circuits; Turning; Voltage-controlled oscillators; Zero voltage switching;
Conference_Titel :
Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual
Print_ISBN :
0-7803-7754-0
DOI :
10.1109/PESC.2003.1218123
