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Automotive HID Ballast System Using Planar Transformer  

Lee, Jae-Hak (Institute of Digital electricity, Suncheon Cheongam College)
Publication Information
전자공학회논문지 IE / v.43, no.3, 2006 , pp. 22-27 More about this Journal
Abstract
This paper presents the control system of high-efficiency automotive 35W metal-halide lamp ballast using the new control method and planar transformer. In this paper, the electronic ballast is designed so that digital control method by microcontroller can be applied to the electronic ballast for the lamp requirement and peripheral environment in order that metal-halide lamp, which has the complicated transient features, is to be applied to the automobile even if it has superior features in brightness, color rendering, light efficiency, and lifespan compared to the conventional halogen lamp. Also, the efficiency increase of the ballast is devised by being varied the switching frequency of Flyback Converter following the battery input voltage of the automobile. Being designed for high-frequency switching transformer of converter in planar form, reduction of loss, weight, overall size are realized and efficient power control in the automobile that had the limited energy and the limited space of battery is devised. The results of the proposed system is verified through various experiment results.
Keywords
Planar Transformer; Automotive HID Ballast; Microcontroller;
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