A Novel Constant-Power Control for Metal-Halide Lamp Electronic Ballasts with Dimming Capability

Author

Huang, Yao-Te ; Hsiao, Horng-Ching ; Liu, Yi-Hua ; Lee, Ching-Ran ; Lee, Li-Ling

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan

Volume

38

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1482

Lastpage

1488

Abstract

In this paper, a new dimmable electronic ballast for metal-halide (MH) lamps based on a three-stage structure is proposed. The presented dimmable electronic ballast can dim smoothly without acoustic resonance from 50% to 100% brightness. A novel current-control method with constant-power capability is also presented to solve the power-drifting problem resulting from the V- I characteristic variations between lamps or caused by the aging of lamp. The dimming capability allows the ballast to adjust its working condition according to the environments or the dimming command; this further improves the energy efficiency. Finally, a 150-W MH lamp ballast prototype is built to verify the feasibility of the proposed methods.

Keywords

electric current control; halides; lamps; power control; constant-power control; current-control method; dimming capability; metal-halide lamp electronic ballasts; power 150 MW; power-drifting problem; Accurate dimming control (ADC); acoustic resonance; metal-halide (MH) lamps; novel current-control (NCC) method with constant-power capability;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2010.2045904

Filename

5453069