Reduction of leakage inductance and AC resistance of planar transformers by optimising the current distribution

被引：7
|
作者：
Rao, Bo [1 ]
Zhao, Ying [1 ]
Yang, Yong [1 ]
Gao, Jun [1 ]
Zhang, Zhengqing [1 ]
Zhou, Song [1 ]
Zhang, Ming [1 ]
Chen, Zhipeng [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Luoyu Rd 1037, Wuhan, Hubei, Peoples R China
来源：
IET POWER ELECTRONICS | 2018年 / 11卷 / 03期
关键词：
transformer windings; electric current control; magnetic leakage; inductance; optimisation; finite element analysis; conductors (electric); leakage inductance reduction; AC resistance reduction; planar transformers; current distribution optimisation; high-power density; high-frequency SMPS; low profile structures; thermal properties; coil current distribution; winding layer; variational method; 3D finite element analysis simulation; physical experiments; current distribution control; conductors width adjustment; FREQUENCY; CONVERTERS;
D O I：
10.1049/iet-pel.2017.0362
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：
Planar transformers (PTs) are becoming increasingly popular in high-power density, high-frequency SMPS in recent years due to their unique advantages including low profile structures and excellent thermal properties. This study focuses on detailed investigation of the effects of coil current distribution within each winding layer on leakage inductance and AC resistance of a PT, and an analytical derivation based on variational method is given. Then the optimal current distribution is proposed and verified through 3D finite element analysis simulation and physical experiments. The results show that the leakage inductance and AC resistance can be reduced further by optimising the current distribution. Accordingly, a practical implementation method is proposed to control the current distribution within a winding layer by adjusting the widths of conductors.
引用
收藏
页码：501 / 506
页数：6
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