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논문 기본 정보

자료유형
학술저널
저자정보
Haijun Lv (Zhejiang University) Xinke Wu (Zhejiang University) Junming Zhang (Zhejiang University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.17 No.5
발행연도
2017.9
수록면
1,137 - 1,149 (13page)

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초록· 키워드

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In order to reduce the cost, improve the efficiency and simplify the complicated control of existing isolated LED drivers, an improved boundary conduction mode (BCM) Buck ac-dc light emitting diode (LED) driver with extended output voltage and low total harmonic distortion is proposed. With a coupled inductor winding and a stacked output, its output voltage can be elevated to a much higher value when compared to that of the conventional Buck ac-dc converter, without sacrificing the input harmonics and power factor. Therefore, the proposed Buck LED driver can meet the IEC61000-3-2 (Class C) limitation and has a low THD. The operating principle of the topology and the design methodology of the ac-dc LED driver are presented. A 150 W ac-dc prototype was built in the laboratory and it shows that the input current harmonics meet the lighting standard. In addition, the THD is less than 16% at a typical ac input. The peak efficiency is higher than 96.5% at a full load and a normal input.

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Abstract
I. INTRODUCTION
II. OPERATING PRINCIPLE OF THE IMPROVED BUCK AC-DC LED DRIVER
III. DESIGN CONSIDERATIONS OF THE IMPROVED BUCK AC-DC LED DRIVER
IV. EXPERIMENTAL VERIFICATIONS
V. CONCLUSIONS
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