基于磁电层状复合材料的无线能量传输系统研究

项目名称： 基于磁电层状复合材料的无线能量传输系统研究

项目编号： No.50877039

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 无线电电子学、电信技术

项目作者： 于歆杰

作者单位： 清华大学

项目金额： 36万元

中文摘要： 本项目针对磁电层状复合材料在无线电能传输方面的应用开展研究。首先建立了任意磁场激励下磁电层状复合材料的磁场－力场－电场模型，推导出各种耦合模式下的等效电路和磁电电压系数表达式，进而得到磁电层合材料入端阻抗和开路电压的表达式。随后基于Metglas和PFC制备了不同长度的磁电层合材料，搭建了磁电层合材料无线电能传输试验系统。在试验研究中，发现并解释了输入输出波形的2倍频现象。尺寸为130mm*11mm*0.3mm的样片在6.9kHz的24Oe(rms)交流磁场下，能够输出超过80V(rms)的开路电压，给3.3kΩ30005;阻提供的平均功率达到520mW，传输效率达到35％，功率密度达到1.21W/cm3，这些数据验证了用磁电层合材料进行无线电能传输的可行性和理论推导表达式的正确性。接下来研究了不同夹持方式和不同偏转角度对输出开路电压的影响，证实了磁电层合材料具有体积小和对偏转角度不敏感的优点。成功尝试了LED照明和电池充电两种应用，为进一步开展更为丰富的应用奠定了基础。

中文关键词： 无线电能传输；磁电层状复合材料；磁电效应

英文摘要： The research on Metglas/PFC magnetoelectric laminated composite has been carried out for wireless energy transfer. The magnetic-mechanic-electric coupling model has been build based on arbitary magnetic input, and the equilent circuit and magnetoelectric factor were deduced. Then the expression for the open circuit voltage and the input impedance were made. Various Metglas/PFC magnetoelectric laminated composites have been prepared and the wireless energy transferring system has been implemented. The double frequency phenomenon between the input and the output waveforms was watched and explained. The laminated with the dimension 130mm*11mm*0.3mm can output more than 80V(rms) voltage with 6.9kHz 24Oe(rms) magnetic field. It can provide the 3.3kΩesistance more than 520mW average power with more than 35% transfer efficiency and power density 1.23W/cm3, which verified the correctness of the theoretic analysis. The effects of different clamping methods and deviation degrees were researched and proved that magnetoelectric laminated composite has the advantage of small dimension and insensitive to the deviation of magnetic field. LED lighting and battery charging were succesfully tried, which contributed the solid base for further abundant applications.

英文关键词： wireless energy transfer; magnetocelectric laminated composite; magnetoelectric effect