电磁谐振无线能量传输系统参数研究

The Parameters Analysis of Wireless Energy Transfer System Based on Magnetic Resonance

谐振线圈参数直接影响电磁谐振无线能量传输系统的效率,研究线圈参数与传输效率之间的关系,对无线传能系统的研究和设计有着非常重要的意义.推导了电磁谐振无线传能系统的数学模型,并利用Matlab对系统的频率、线圈半径、线圈匝数、线圈长度、线圈间距离等参数进行了仿真研究.研究结果指出了系统各参数变化时对系统效率影响,频率、线圈半径和线圈匝数等参数增大有利于提高传输效率,但增大到一定程度后对效率的影响不再明显;线圈长度和线圈间距离增加会降低系统效率,但可以通过提高系统频率来进行补偿.

The resonance coil＇s parameters are the most crucial factors affecting the transmission efficiency.So,it has very important significance for the research and design of wireless transmission system that studies the relation between the coil＇s parameters and transfer efficiency.The paper derived the mathematical model of wireless energy transfer system based on magnetic resonance,and studied the frequency,radius of coil,turns number of magnetic mirror coil,the length of coil and distance between two coils by Matlab.The results pointed out the impacts of the system parameter change on the system efficiency,the increasing of the parameters such as frequency,radius of coil and turns number of magnetic mirror coil is helpful to improve transmission efficiency,but it has a little effect on transmission efficiency when the parameters increase to a certain value.The increasing of the parameters such as the length of coil and distance between two coils will reduce the transmission efficiency,but it can be compensated by increasing the system frequency.