High-Frequency PCB Winding Transformer With Integrated Inductors for a Bi-Directional Resonant Converter

被引:140
|
作者
Li, Bin [1 ]
Li, Qiang [1 ]
Lee, Fred C. [1 ]
机构
[1] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA
关键词
High frequency; magnetic integration; on-board charger; printed circuit board (PCB) transformer; widebandgap device; DC-DC CONVERTER;
D O I
10.1109/TPEL.2018.2874806
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The momentum toward high power density high-efficiency power converters continues unabated. The key to reducing the size of power converters is high-frequency operation and the bottleneck is the magnetic components. With the emerging widebandgap devices, the switching frequency of power converters increases significantly, to hundreds of kilohertz, which provides us the opportunity to adopt printed circuit board (PCB) winding planar magnetics. Compared with the conventional litz-wire-based magnetics, planar magnetics can not only effectively reduce the converter size, but also offer improved reliability through automated manufacturing process with repeatable parasitics. Another way to reduce the number of magnetic components and shrink the size of power converters is through the magnetic integration. In this paper, a novel PCB winding based magnetic structure is proposed to integrate both inductor and transformer into one component. In this structure, the inductor value can be easily controlled by changing the cross-sectional area of the core or the length of the air gap. A 6.6-kW 500-kHz CLLC resonant converter prototype with 98% efficiency and 130-W/in(3) (8 kW/L) power density is built to verify the feasibility of the proposed PCB winding based magnetic structure.
引用
收藏
页码:6123 / 6135
页数:13
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