Design and Optimization of Asymmetric and Reverse Series Coil Structure for Obtaining Quasi-Constant Mutual Inductance in Dynamic Wireless Charging System for Electric Vehicles

被引：21

作者：

Li, Zhongqi ^{[1
,2
]}

Li, Jing ^{[1
]}

Li, Shangyou ^{[1
]}

Yu, Yue ^{[1
]}

Yi, Jiliang ^{[1
]}

机构：

[1] Hunan Univ Technol, Coll Traff Engn, Zhuzhou 412007, Peoples R China

[2] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Hunan, Peoples R China

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2022年 / 71卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Inductance; Inductive charging; Couplers; Optimization methods; Vehicle dynamics; Electric vehicles; Stability criteria; Calculation of mutual inductance; new coil structure; optimization method; wireless power transfer (WPT); POWER TRANSFER SYSTEMS;

D O I：

10.1109/TVT.2021.3138072

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：

Lateral misalignment along the driving direction may achieve half the length of a transmission coil in a dynamic wireless charging system for electric vehicles, which is called limit misalignment. This limit misalignment may cause the dynamic wireless charging system to malfunction because of the large fluctuation in mutual inductance. In this paper, an asymmetric and reverse series coil (ARSC) structure is proposed. In the ARSC structure, the transmission coil is smaller than the receiving coil in size to smoothen the fluctuation in mutual inductance. The receiving coil consists of a large coil (R-x1) and a small coil (R-x2) and R-x1 is reversely connected to R-x2 in series. The purpose of this design is to further reduce the fluctuation in mutual inductance. A calculation method of mutual inductance is then proposed based on the vector potential to calculate the mutual inductance of the ARSC structure. The law of mutual inductance is analyzed by the proposed calculation method for the ARSC structure. Moreover, an optimization method of coil parameters is proposed to obtain quasi-constant mutual inductance. The ARSC structure and optimization method are not only simple but can also make the mutual inductance nearly constant. Calculation, simulation, and experimental results validating the proposed method and structure are shown.

引用

页码：2560 / 2572

页数：13