A Novel AC-to-DC Adaptor with Ultra-High Power Density and Efficiency

被引：0

作者：

Li, Yan-Cun ^{[1
]}

Lee, Fred C. ^{[1
]}

Li, Qiang ^{[1
]}

Huang, Xiucheng ^{[1
]}

Liu, Zhengyang ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Ctr Power Elect Syst, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA

来源：

APEC 2016 31ST ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION | 2016年

关键词：

Gallium nitride (GaN); Bridgeless Boost Converter; LLC dc transformer (DCX); ac-to-dc adaptor; MODE EMI NOISE; ELECTROLYTIC CAPACITOR;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper proposes a novel ac-to-dc adaptor circuit with ultra-high power density and efficiency, which is based on a two-stage topology, consists of a bridgeless boost converter followed by a LLC converter. The bridgeless boost converter is in charge of regulating output voltage and minimizing bulk capacitor, while the LLC converter is operated as a dc transformer (DCX) and plays a role of providing isolated voltage step-down, maximizing circuit efficiency and simplifying the control circuit. Furthermore, in order to achieve ultra-high power density and high efficiency, the proposed circuit applies gallium nitride (GaN) devices and planar transformer, while operates the circuit to around 1MHz to shrink both the sizes of EMI filter and magnetic components. By applying the proposed circuit, both the features of high performance and compact volume could be achieved; up to 44.22W/in(3) power density and 94% efficiency are obtained from a 65W ac-to-dc adaptor prototype.

引用

页码：1853 / 1860

页数：8

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