| Title |
A Study on Electronic Ballast for 1[㎾] Metal-Halide Lamp Developed by Eliminating Acoustic Resonance using Frequency Modulation Method |
| Authors |
Chong-Yeun Park ; Bong-Jin Lee |
| Keywords |
Metal Halide Lamp ; Electronic ballast ; Acoustic Resonance |
| Abstract |
This paper presents the design and implementation of an electronic ballast with a passive PFC structure from which acoustic resonance of the metal halide lamp was removed by introducing the frequency modulation(FM) method. The proposed ballast consists of an EMI filter, passive PFC circuit, full-bridge inverter, LC resonance type ignitor and a circuit for removing acoustic resonance. The FM method solved two problems associated with single frequency driving: variation of the acoustic resonance range according to lamp aging and the acoustic resonance range discrepancy caused by different materials sealed inside the arc tube and their pressures for arc tubes of identical sizes from different manufacturers. Performance of the prototype developed for this study of the electronic ballast for 1[㎾] metal halide lamp was verified by evaluating its optical conversion efficiency, input PF, input current THD and power conversion efficiency. |