Current-Fed Parallel-Resonant DC–AC Inverter for Cold-CathodeFluorescent Lamps With Zero-Current Switching

Author

Liang, Tsorng-Juu ; Chen, Ren-Yi ; Chen, Jiann-Fuh

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan

Volume

23

Issue

4

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

2206

Lastpage

2210

Abstract

This letter proposes a novel current-fed parallel-resonant dc-ac inverter with zero-current switching (ZCS) for cold-cathode fluorescent lamps (CCFLs). The leakage inductance of the transformer is integrated within the resonant tank in order to reduce the voltage spikes across the switches. A laboratory prototype is implemented to drive a 617 mm/7W CCFL. Experimental results indicate that the switches of the proposed resonant inverter are operated under the ZCS condition, and the efficiency is approximately 86.8%. The lamp voltage is about 977 V and the lamp current is 7 mA.

Keywords

DC-AC power convertors; fluorescent lamps; inductance; power transformers; resonant invertors; zero current switching; cold-cathode fluorescent lamps; current-fed dc-ac inverter; leakage inductance; parallel-resonant dc-ac inverter; resonant inverter; transformer; zero current switching; Circuits; Diodes; Fluorescent lamps; Inductance; Inductors; Resonance; Resonant inverters; Switches; Voltage; Zero current switching; Cold-cathode fluorescent lamp (CCFL); current-fed; resonant inverter; zero-current switching (ZCS);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2008.926945

Filename

4558241