High efficiency metal halide discharge lamp ballast with an internal igniter and low ripple lamp current

Inkyu Lee, B. H. Cho

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This is a proposal for a half-bridge type metal halide discharge (MHD) lamp ballast with a coupled inductor and a frequency-controlled synchronous rectifier. To avoid using an external igniter, the internal LC resonance of a buck converter is used to generate a high-voltage pulse for the ignition. A coupled inductor filter is used for steady state ripple cancellation. This filter allows the MHD lamp to avoid the acoustic resonance phenomenon. To improve the efficiency of the ballast, a synchronous buck converter is used for the DC/DC converter stage and a frequency control method is proposed. This scheme reduces the circulation current and turn-off loss of the metal-oxide semiconductor field effect transistor (MOSFET) switch in the constant power operation, which results in an increase of the efficiency of the ballast system compared to fixed frequency control. A front-end power factor correction circuit is included in the ballast. This proposal zis verified with hardware experiments.

Original languageEnglish
Pages (from-to)291-298
Number of pages8
JournalIET Electric Power Applications
Volume1
Issue number3
DOIs
Publication statusPublished - 2007 May 18
Externally publishedYes

Fingerprint

Ballasts (lamp)
Metal halide lamps
Discharge lamps
Electric lamps
MOSFET devices
DC-DC converters
Ignition
Acoustics
Switches
Hardware
Networks (circuits)
Electric potential
Experiments

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

High efficiency metal halide discharge lamp ballast with an internal igniter and low ripple lamp current. / Lee, Inkyu; Cho, B. H.

In: IET Electric Power Applications, Vol. 1, No. 3, 18.05.2007, p. 291-298.

Research output: Contribution to journalArticle

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