| 路面材料磁化对无线电能传输的能量损失效应研究 |
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| 引用本文： | 李峰,孙轩,朱兴一,陈宇航,冯锦艳.路面材料磁化对无线电能传输的能量损失效应研究[J].中国公路学报,2021,34(3):71-79. |
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| 作者姓名： | 李峰 孙轩 朱兴一 陈宇航 冯锦艳 |
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| 作者单位： | 1. 北京航空航天大学 交通科学与工程学院, 北京 100191;
2. 同济大学 道路与机场工程教育部重点实验室, 上海 200092 |
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| 基金项目： | 国家重点研发计划项目(2018YFB1600100);国家自然科学基金优秀青年基金项目(51922079,51622805);同济大学道路与交通工程教育部重点实验室开放基金项目。 |
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| 摘 要： | 无线充电路面是将无线电能传输技术与路面结构相结合的一种新型智能路面，可使路面同时满足行驶功能和无线充电功能。设计实用的无线充电路面，需要将传输装置埋设于路面材料中，如水泥混凝土和沥青混凝土材料。无线电能传输是路面中的原边线圈和电动汽车上的副边线圈经感应耦合谐振完成的。现有无线电能传输过程都是在空气中进行的，当传输过程需要穿过路面材料时，空间介质的电磁特性对无线电能传输所产生的影响需要探究。为此，选取AC-13型沥青混凝土和C30普通硅酸盐水泥混凝土，研究分析2种路面材料的磁化性能以及对感应耦合谐振电路的能量损失效应。首先通过振动样品磁强计，对2种路面材料组成成分的磁化性能进行定量分析，接着采用LCR测试仪测量其感应耦合系数，最后搭建87 kHz的无线电能传输系统来研究能量损失效应。研究结果表明：沥青混凝土和水泥混凝土组成成分的磁化性能差异较大，水泥混凝土可视为连续的磁性介质，而沥青混凝土不连续；2种路面材料在感应耦合谐振电路中会降低感应耦合系数，且材料的磁化会使无线电能传输系统的谐振电路失谐，导致原边功率下降12.7%和14.2%，并造成能量损失；经调节谐振状态后发现，电路的谐振频率向低偏离；为了降低无线充电路面的能量损失，在设计过程中应将路面材料的磁化作为关键因素来考虑。
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| 关 键 词： | 道路工程 无线电能传输 试验研究 路面材料 磁化 感应耦合谐振 能量损失 |
| 收稿时间： | 2020-02-15 |
Magnetization Properties of Pavement Materials and Energy Loss Impact on Wireless Power Transfer |
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| LI Feng,SUN Xuan,ZHU Xing-yi,CHEN Yu-hang,FENG Jin-yan.Magnetization Properties of Pavement Materials and Energy Loss Impact on Wireless Power Transfer[J].China Journal of Highway and Transport,2021,34(3):71-79. |
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| Authors: | LI Feng SUN Xuan ZHU Xing-yi CHEN Yu-hang FENG Jin-yan |
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| Affiliation: | 1. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China;
2. Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China |
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| Abstract: | A wireless charging pavement is a new type of intelligent pavement that combines wireless power transfer(WPT)technology with a pavement structure to enable the pavement to perform both driving and wireless charging functions.Practical wireless charging pavements require to bury devices inside the pavement materials such as asphalt concrete and Portland cement concrete.Wireless power transfer technology relies on inductive coupling resonance between primary coils in the pavement and secondary coils in electric vehicles.For existing wireless power transfer technology,the transfer medium is air.When pavement materials serve as an environmental medium,their electromagnetic properties can influence wireless power transfer,which needs to be investigated.In this study,AC-13 asphalt concrete and C30 Portland cement concrete were selected as pavement materials,and the impact of their magnetization properties and energy loss on inductively coupled resonant circuits were investigated.First,through a vibrating sample magnetometer,the magnetization properties of the components were quantified.The influence on the inductively coupled resonant circuits was then measured with an LCR meter.Finally,an actual 87 kHz WPT system was established to investigate the impact of factual energy loss.The results show that asphalt and Portland cement concretes contain components with very different magnetization properties.Portland cement concrete can be considered as a continuous magnetic medium,whereas asphalt concrete is discontinuous with many medium interfaces.The two kinds of pavement materials can decrease the inductive coupling factor,and magnetization can cause resonant circuit mismatch and reduce power output at the primary side by 12.7%and 14.2%,respectively.The resonant frequency was found to have decreased after adjusting the frequency of the power source.Therefore,to reduce the energy loss of wireless charging pavements,the electromagnetic properties of pavement materials should be considered as a key factor in the design process. |
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| Keywords: | road engineering wireless power transfer experimental research pavement materials magnetization inductive coupling resonance energy loss |
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