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The Development of the Buck Type Electronic Dimming Ballast for 250W MHL
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 Title & Authors
The Development of the Buck Type Electronic Dimming Ballast for 250W MHL
Jung, Dong-Youl; Park, Chong-Yeon;
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 Abstract
In this paper, we studied the development of the electronic ballast for 250W MH (Metal-Halide) lamps. We were able to improve the input power factor by using a PFC IC. To provide the lamp with the rated voltage required, we used the buck-type dc-dc converter. The stress of the switching devices in the inverter could be reduced by this method. To eliminate the acoustic resonance phenomena of MH lamps, the voltage of the lamp added the high frequency sine-wave to the low frequency square-wave by using the full bridge typed inverter. We have developed a simple igniter using the L and C elements. We could control the dimness of the lamp by varying the output voltage of the buck converter. The buck converter output voltage could be controlled by using a microprocessor.
 Keywords
Acoustic resonance;Buck converter;Electronic ballast;Metal halide lamp;Switching stress;
 Language
English
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