电磁场能量传输特性实验装置研究

Research on experimental instrument of electromagnetic energy transmission characteristic

基于磁耦合谐振式无线电能传输仪研制出一套电磁场能量传输特性实验装置,用于研究不同介质中(空气、有机玻璃及不同盐度的海水)电磁场能量传输效率与频率、距离之间的关系。实验结果表明:在空气介质中,当负载为3Ω时,最大传输效率对应的频率由谐振频率92 kHz偏移至88 kHz;传输效率随距离的增加而减小。当传输距离为10 cm、驱动为3Ω负载时,5 mm厚有机玻璃中的传输效率较空气中提升了1.39%;不同盐度海水中,当盐度为35‰时,传输效率出现一个极大值。因此,利用此实验装置有助于无线电能传输效率的研究及电磁场传输相关领域的研究。

In order to study the relationship between the transmission efficiency and frequency and distance of electromagnetic energy in different media(air, organic glass and seawater with various salinities), an experimental instrument of electromagnetic energy transmission characteristic based on magnetically-coupled resonant wireless power transfer system was developed. The results show that the frequency corresponding to maximum transmission efficiency is offset from the resonant frequency 92 kHz to 88 kHz and the transmission efficiency decreases with increasing distance when the load is resistance of 3 Ω in the air medium. When the distance is fixed at 10 cm and the load is kept resistance of 3 Ω, the transmission efficiency in organic glass is 1.39% higher than that of air. With the different salinity in seawater, a maximum value of transmission efficiency appears at 35‰ salinity. Thus, the experimental instrument can be used to study the wireless power transfer efficiency and the related fields of electromagnetic transmission.