一种双耦合的无线电能传输磁场耦合器设计

论文总字数：27296字

摘 要

感应耦合电能传输（Inductively Coupled Power Transfer，ICPT）作为无线电能传输（Wireless Power Transfer，WPT）的一种，利用线圈间耦合的磁场进行电能传输，因其传输效率高、距离远、功率大等优势已成为目前国内外学者的研究热点，并已在电动汽车充电等领域有了广泛的应用。在实际应用中，充电线圈从最佳对准位置偏移会导致耦合系数减小，最终对输出功率造成极大影响。在目前的研究中，提升系统的抗偏移能力已经成为一个重要的研究方向。

本文首先介绍了ICPT系统的基本补偿拓扑及双边LCC拓扑，采用基波分析法（Fundamental Harmonic Analysis，FHA）对其输出特性进行分析并研究其抗偏移能力的不足。接着将双边LCC拓扑的补偿电感与主线圈集成到磁场耦合器中，提出一种新型的双耦合LCC拓扑。分析双耦合系统输出特性并结合耦合系数关于线圈偏移的关系，以研究抗偏移设计思路，最终设计出双耦合LCC补偿的ICPT系统。经理论推导，双耦合磁场耦合器中补偿电感之间的耦合和补偿电感与主线圈之间的交叉耦合导致系统抗偏移能力的提升。最后分别设计了3.5kW的单、双耦合LCC补偿的ICPT系统，并利用Simulink软件进行仿真验证。仿真结果表明双耦合系统可以有效提升系统抗偏移能力，在x、y方向偏移150mm时分别保持49.6%和71.5%的最佳对准功率。

关键字：感应耦合电能传输，LCC补偿，双耦合，抗偏移能力

Abstract

As a kind of wireless power transfer(WPT), inductively coupled power transfer(ICPT) technology uses the coupled magnetic field between coils to transfer energy. Because of its high transmission efficiency, long distance, and high power, it has become a research hotspot for scholars at home and abroad, and has been widely used in electric vehicle charging and other fields. In practical applications, the misalignment of coils causes the decrease of coupling coefficient, which ultimately has a great impact on the output power. In the current research, improving the capacity of misalignment tolerance has become an important research direction.

This thesis first introduces the basic compensation topologies and double-sides LCC(inductance-capacitor-capacitor) topology of ICPT system, then analyzes its output characteristics through a method of fundamental harmonic analysis(FHA) and study its disadvantages in misalignment tolerance.Then proposes a new dual-coupled LCC topology by integrating the main coils and compensation inductors into a compact magnetic coupler. The output characteristics of the dual-coupled system are analyzed with the relationship between the coupling efficient and the coil offset to study the way to improve the capaticy of misalignment tolerance. Finally, a dual-coupled LCC-compensated ICPT system is designed.In the dual-coupled magnetic coupler, the coupling between the compensation inductors, the cross-coupling between the compensation inductors and main coils theoretically improves the capacity of misalignment tolerance. At last, 3.5kW single- and dual-coupled LCC-compensated ICPT system are designed and verified by Simulink software respectively. The simulation results show that the dual-coupled system can effectively improve the misalignment tolerance, and respectively remains about 49.6% and 71.5% of the well-aligned power at 150 mm offset in the x- and y-directions.

KEY WORDS: inductively coupled power transfer, LCC compensation, dual coupling, misalignment tolerance.

目 录

摘要 ......................................................................................................................................Ⅰ

Abstract ................................................................................................................................Ⅱ

第一章 绪论 ......................................................................................................................1

1.1 研究背景 ........................................................................................................1

1.2 ICPT系统简介 .................................................................................................1

1.3 抗偏移ICPT系统的研究现状 ............................................................................2

1.4 论文的主要研究内容 ..........................................................................................4

第二章 单耦合补偿拓扑的研究 ..........................................................................................6

2.1 ICPT基本补偿拓扑简介 ...................................................................................6

2.2 双边LCC补偿拓扑研究 ...................................................................................6

2.2.1 双边LCC补偿拓扑结构 ..............................................................6

2.2.2 双边LCC拓扑谐振频率的分析 ................................................7

2.2.3 双边LCC拓扑输出特性分析 .......................................................9

2.3 本章小结 ......................................................................................................10

第三章 双耦合LCC补偿拓扑介绍 .................................................................................11

3.1 引言 ....................................................................................................................11

3.2 双耦合LCC补偿拓扑介绍 ..........................................................................11

3.3 双耦合LCC补偿拓扑的输出特性分析 .....................................................12

3.4 本章小结 ......................................................................................................15

第四章 双耦合LCC补偿的ICPT系统设计 ...................................................................16

4.1 高频逆变器设计 ...............................................................................................16

4.2 双耦合磁场耦合器设计 .................................................................................17

4.2.1 无线充电标准SAE J2954介绍 .....................................................17

4.2.2 双耦合线圈形状 ..........................................................................18

4.2.3 线圈绕线宽度及耦合系数的确定 ..............................................18

4.2.4 线路参数的确定 ..........................................................................20

4.2.5 电磁屏蔽措施 .................................................................................22

4.2.6 设计的磁场耦合器模型 ............................................................22

4.3 整流及滤波模块设计 ........................................................................................23

4.4 本章小结 ......................................................................................................23

第五章 仿真与分析 .............................................................................................................24

5.1 单耦合LCC补偿的ICPT系统仿真 ............................................................24

5.1.1 单耦合系统的参数设置 ............................................................24

5.1.2 单耦合系统的仿真结果 ............................................................24

5.2 双耦合LCC补偿的ICPT系统仿真 ............................................................27

5.3 对比分析 ......................................................................................................30

总结与展望 ..........................................................................................................................31

参考文献 ................................................................................................................................................32

致谢 ......................................................................................................................................34

1. 绪论

1.1研究背景

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