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http://dx.doi.org/10.5207/JIEIE.2002.16.2.009

Efficiency Improvement of an Electronic Ballast for HID Lamps  

이성희 (포항산업과학연구원 기전연구팀 연구원)
이치환 (위덕대 전자공학과)
권우현 (경북대학교 전자공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.16, no.2, 2002 , pp. 9-17 More about this Journal
Abstract
A high-efficiency electronic ballast for HID lamps is presented. The ballast consists of a PFC and a resonant inverter. To reduce losses of the ballast, DC link voltage should be determined by taking into account the peak voltage of lamp and the maximum flux density should be kept 0.2[T] on all of inductors. AR inductor at bridge diode is employed in order to remove currant harmonics from PFC. An inductor is connected in series with an electrolytic capacitor at DC link to reject high-frequency current. The acoustic resonance is eliminated using the stead spectrum technique. The electronic ballast for 250[W] metal-halide discharge lamp is implemented and 96[%] efficiency, no acoustic resonance and low conducted EMI level are accomplished.
Keywords
electronic ballast; MHD lamp; efficiency; resonant inverted; stead spectrum;
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