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(Development of A Digital Controller of The Electronic Ballast using High Frequency Modulation Method for The Metal Halide Lamp)  

O, Deok-Jin (Dept. of Electronic Engineering Hanyang University)
Kim, Hui-Jun (Dept. of Electronic computer Engineering, Hanyang University)
Jo, Gyu-Min (Dept.of Information Communication, Yuhan College)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.39, no.3, 2002 , pp. 228-238 More about this Journal
Abstract
This paper presents a digital controller of the electronic ballast using high frequency modulation method for the metal halide lamp. The proposed controller includes the control algorithm for soft starting, no load protection, over current protection and power control. The proposed digital controller, moreover, has the high frequency modulation scheme and the tracking algorithm to avoid acoustic resonance phenomena. For the math production with the low cost using the ASICs (Application Specific Integrated Circuit), the proposed digital controller has been designed with the FPGAs(Field Programmable Gate array) only, without any microprocessor. In this paper, the detail digital control algorithms are described and the experimental results of prototype 150w metal halide electronic ballast are presented.
Keywords
digital controller; high frequency modulation; electonic ballast; mebal halide lamp; FPGA;
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