A unity power factor high frequency parallel resonant electronic ballast

Author

Lee, Chul H. ; Joung, Gyu B. ; Cho, Gyu H.

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

fYear

1990

fDate

7-12 Oct. 1990

Firstpage

1149

Abstract

An electronic-ballast circuit that operates at a 20 kHz resonant frequency with zero voltage switching is described for a metal halide lamp. In order to minimize the switching loss, the ballast employs the zero-voltage switching, scheme in which the switching instants are synchronized with the voltage zero crossing points. For a base driver, self-oscillation is used. The base driver and controller consist of one leg of a transformer, two resistors, and two capacitors, making the ballast more compact, lighter, and more reliable. A prototype ballast for a 175 W metal halide lamp has been fabricated and tested. All the features of the ballast have been verified experimentally.<>

Keywords

capacitors; lamp accessories; metal vapour lamps; resistors; switching; transformers; 175 W; 20 kHz; HF; base driver; capacitors; controller; high frequency parallel resonant electronic ballast; lamp accessories; metal halide lamp; power factor; resistors; self-oscillation; transformer; zero voltage switching; Driver circuits; Electronic ballasts; Frequency synchronization; Lamps; RLC circuits; Reactive power; Resonance; Resonant frequency; Switching loss; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE

Conference_Location

Seattle, WA, USA

Print_ISBN

0-87942-553-9

Type

conf

DOI

10.1109/IAS.1990.152329

Filename

152329