DESIGN AND OPTIMIZATION OF STRUCTURE OF TOWER-TYPE COIL IN WIRELESS CHARGING SYSTEM FOR ELECTRIC VEHICLES | Zendy

Zhongqi Li | Zendy; Min Zhang | Zendy; Shoudao Huang | Zendy; Jiliang Yi | Zendy

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DESIGN AND OPTIMIZATION OF STRUCTURE OF TOWER-TYPE COIL IN WIRELESS CHARGING SYSTEM FOR ELECTRIC VEHICLES

Author(s) -

Zhongqi Li,

Min Zhang,

Shoudao Huang,

Jiliang Yi

Publication year - 2019

Publication title -

progress in electromagnetics research b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.208

H-Index - 47

ISSN - 1937-6472

DOI - 10.2528/pierb19051201

Subject(s) - tower , electromagnetic coil , computer science , wireless , electrical engineering , type (biology) , automotive engineering , telecommunications , engineering , structural engineering , geology , paleontology

Magnetic resonant wireless power transfer (WPT) is an emerging technology that may create new applications for wireless power charging. However, the output voltage and efficiency fluctuations resulting from lateral misalignments are main obstructing factors for promoting this technology. In this paper, a structure of tower-type coils is proposed. The mathematical model of the proposed structure is built based on equivalent circuit method. The expressions of the output voltage and efficiency are then derived by solving the system equivalent equations. In addition, a method of optimizing the mutual inductance between the transmission coil and intermediate coil and the strong-coupling parameters between the intermediate coil and receiving coil is proposed. The mutual inductance between the transmission coil and intermediate coil can be kept nearly constant with lateral misalignments, and the optimum strong-coupling parameter between the intermediate coil and the receiving coil can be obtained by the proposed method. Therefore, the output voltage and efficiency can be kept nearly constant with different lateral misalignments. The WPT system based on tower-type coils via magnetic resonance coupling is designed. Simulated and experimental results validating the proposed method are given.

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