|Table of Contents|

 Design and optimization of magnetic core structuresfor EV wireless charging systems(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2018年01
Page:
8-15
Research Field:
Publishing date:

Info

Title:
 Design and optimization of magnetic core structuresfor EV wireless charging systems
Author(s):
 LIU Zhi-zhen ZENG Hao CHEN Hong-xing HEI Tong ZHOU Bo
  ( School of Electrical Engineering,Shandong University,Jinan 250061,China)
Keywords:
magnetic core structures design and optimization magnetic coupler coupling coefficientEV wireless charging
PACS:
TM 724
DOI:
-
Abstract:
 Aiming at the problem that low coupling coefficient of EV wireless charging system always leadsto low charging efficiency,a method improving the coupling coefficient by design and optimization mag-netic core was proposed. The equations about output power and efficiency were derived from the equiva-lent circuit,and the expressions about coupling coefficient were obtained by analyzing the equivalentmagnetic circuit diagrams,which provide the basis for optimizing magnetic core structures for both singlecoil and double coil couplers. Then a process of design and optimization of magnetic cores was presentedand following the process a wheel-shaped core structure was designed for circular coil and a concave corestructure was proposed for Double-D( DD) coil. The 3D FEM simulation and experimental results showthat the optimized core structure has a 10% ~ 30% improvement in the coupling coefficient. Comparedwith the original charging system,charging efficiency of the wireless charging system using the optimizedcore structure is improved significantly.

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Last Update: 2018-06-28