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논문 기본 정보

자료유형
학술저널
저자정보
Seong-Ju Kim (Inha University) Young-Seok Kim (Inha University) Choon-Taek Kim (Inha University) Joon-Min Lee (Inha University) Jae-Du La (Inha Technical College)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.10 No.5
발행연도
2015.9
수록면
2,031 - 2,039 (9page)

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초록· 키워드

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In the LED lighting industry, the dimming function in the LED lamp is required by demands of many consumers. To drive this LED lighting, various types of power converters have been applied. Among them, an LLC resonant converter could be applied for high power LED lighting because of its high efficiency and high power density, etc. The function of power factor correction (PFC) might be added to it. In this paper, a dimmable single-stage asymmetrical LLC resonant converter is proposed. The proposed converter performs both input-current harmonics reduction and PFC using the discontinuous conduction mode (DCM). Also, the lower voltage stress across switching devices as well as the zero voltage switching (ZVS) in switching devices is realized by the proposed topology. It can reduce cost and has high efficiency of the driver. In addition, the regulation of the output power by variable switching frequency can vary the brightness of a light. In the proposed converter, one of the attractive advantages doesn’t need any extra control circuits for the dimming function. To verify the performance of the proposed converter, simulation and experimental results from a 300W prototype are provided.

목차

Abstract
1. Introduction
2. Principle of the Proposed Converter
3. Analysis of Voltage Conversion Ratio Versus Duty Ratio to Reduce Switch Voltage Stress in the DCM PFC
4. Analysis of Dimming Method Through Frequency Control
5. The Verification of the Proposed Converter
6. Conclusion
References

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