电动汽车无线充电系统中的线圈形状设计和EMF环境评估

发布时间：2025-03-14 22:33

　　因为人们喜欢灵活、便携、无绳的电器,无线电力传输(WPT)是一种很有前途的技术,可以在不使用物理连接的情况下为这些设备供电。因此,WPT技术以其便利、安全,即使在雨天的情况下也不需要维护而受到广泛的关注。另一方面,使用电动发动机代替内燃机(ICE)的电动汽车(EV),在高效率、低噪音、日常维护少、尾气零排放等方面优于传统的ICE汽车。然而,电动汽车充电时间长,成本高,行驶里程短,而且缺乏可靠的电动汽车电池充电装置。这些原因以及更多的原因在推迟它们的实际部署方面存在着重大问题。为了解决这些问题,电动汽车在停车时间和道路上均采用WPT充电。由于电磁场(EMF)通过较大的气隙将功率从发射机(Tx)线圈传输到接收机(Rx)线圈,从而增加充电器周围的漏磁通量。因此,增强耦合需要在工作区域(两个线圈之间)增加EMF,同时降低工作区域外的EMF,因为它会对生物健康产生影响,并会干扰附近的电子设备。本文的贡献主要分为两个部分:首先,研究线圈和铁芯的形状,以增强工作区域的磁耦合。其次,评估充电器周围的EMF环境,以确保此设计符合国际EMF指南。此外,介绍了采用集总电路模型的WPT系统模型,讨论了铁芯相对磁...

【文章页数】：142 页

【学位级别】：博士

【文章目录】：
ACKNOWLEDGMENTS
摘要
abstract
Chapter1.INTRODUCTION
    1.1 Background
    1.2 Wireless power transfer history and basic concepts
    1.3 Classification of Wireless Power Transfer Systems
        1.3.1 Near-Field Wireless Power Transfer Systems
            1.3.1.1 Inductive power transfer(IPT)system
            1.3.1.2 Capacitive power transfer(CPT)system
        1.3.2 Far-Field Wireless Power Transfer Systems
            1.3.2.1 MICROWAVE POWER TRANSFER(MPT)
            1.3.2.2 Laser Power Transfer(LPT)
            1.3.2.3 Wireless Energy Harvesting(WEH)
    1.4 Electric vehicles charging technologies
    1.5 Exposure to time-varying electromagnetic fields
    1.6 Electromagnetic interference(EMI)
    1.7 Electromagnetic Standards and guidelines
    1.8 STATE OF THE ART
        1.8.1 MAGNETIC PAD STRUCTURE
            1.8.1.1KAIST
            1.8.1.2 University of Auckland(UOK)
            1.8.1.3 Non-Polarized and Polarized pads
        1.8.2 SHIELDING TECHNIQUES
            1.8.2.1 Conventional shielding method
            1.8.2.2 Active shielding method
            1.8.2.3 Resonance reactive current loop method
        1.8.3 COMPENSATION TOPOLOGIES
        1.8.4 COMMERCIAL WPT CHARGERS
        1.8.5 THE RESEARCH OBJECTIVES
        1.8.6 The thesis outline
Chapter2.SYSTEM MODEL and ANALYSIS
    2.1 Introduction
    2.2 Electromagnetic field theory
        2.2.1 Maxwell's equations
            2.2.1.1 Gauss’s law
            2.2.1.2 Ampere’s law with Maxwell’s correction
        2.2.2 Skin and proximity effects
    2.3 WPT for charging EVs modeling
        2.3.1 Self-and mutual inductance
            2.3.1.1 Inductance for air-core
            2.3.1.2 Inductance in the presence of ferrite
        2.3.2 FEM analysis tool:
        2.3.3 The lumped circuit model
    2.4 Design Analysis
        2.4.1 Impact of load resistance and mutual inductance
        2.4.2 Impact of coupling coefficient and frequency
    2.5 Biot-Savart Law
    2.6 Chapter conclusion
Chapter3.Coils design and EMF Environment Evaluation
    3.1 Introduction
    3.2 Coil and Core Design Analysis
        3.2.1 Coil Geometry
        3.2.2 Core Material Permeability and Core Loss Evaluation
            3.2.2.1 Core Material Permeability
            3.2.2.2 Core Loss and Core Thickness
    3.3 The Proposed Core Structure
        3.3.1 The Simulation Analysis
        3.3.2 Optimal Core Structure Design
    3.4 Experimental Set-Up
        3.4.1 Experimental Results
        3.4.2 Four core structure further analysis
    3.5 Chapter Conclusion
Chapter4.The shielding techniques in WPT systems
    4.1 Introduction
        4.1.1 Passive shielding
        4.1.2 Active shielding
        4.1.3 Resonant reactive current(RRC)shielding
    4.2 Shielding Effectiveness SE
    4.3 System model and analysis
        4.3.1 WPT MODELING WHEN FERRITE SHIELD IS USED
        4.3.2 WPT system modeling when using metallic shield
        4.3.3 WPT modeling when using RRC shield
    4.4 The resonant reactive current shield loop position
    4.5 EMF environment evaluation method
        4.5.1 Simulation results for the proposed two shield loops positions
    4.6 The proposed shielding techniques
        4.6.1 Simulation results analysis
        4.6.2 The experimental set-up
    4.7 Chapter conclusion
Chapter5.CONCLUSION AND RECOMMENDATIONS
    5.1 CONCLUSION
    5.2 RECOMMENDATIONS
References
Publication list



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