摘要
针对目前常用的磁耦合谐振式无线电能传输系统中,耦合距离变化时,最佳谐振点随之改变导致传输效率迅速下降的问题,提出一种四线圈的无线电能传输结构,并将"L型"阻抗匹配电路结构分别引入发射和接收端,推导了四线圈传输模型结构下传输效率η与正向传输系数S_(21)的绝对值的平方成正比之间的关系,在发射和接收端分别引入"L型"阻抗匹配电路结构来增大系统的正向传输系数。搭建了四线圈磁耦合谐振式无线电能传输系统模型,测量并分析了不同线圈间的距离对系统传输效率和负载电压的影响,验证了理论分析与实验数据的一致性,通过四线圈磁耦合谐振式无线电能系统设计,有效地提高了无线电能传输效率。
In order to solve the problem that when the couping distance changes in the cmTently used magnetic coupling resonant wireless power transmission system, the change of the optimal resonancee point cuases a sig- nificant reduce in system efficiency, an L-type impedance matching circuit implemented at both the transmitting and receiving sides of a 4-coil wireless power transmission system is proposed. A 4-coil magnetic coupling reso- nant wireless power transmission system model was built. The influence of the distance between different coils on the transmission efficiency and load voltage was measm^d and analyzed, and the consistency between the theoretical analysis and experimental data was verified. Through the design of the 4-coil magnetic coupling res- onant wireless power system, the efficiency of wireless power transmission is effectively improved.
作者
赫荣红
黄劲松
HE Rong-hong;HUANGJln-song(School of Electrical Engineering and Control,Liaoning Technical University,Huludao 125105,China;State Grid Shizuishan Power Supply Company,Shizuishan 753000,China)
出处
《测控技术》
CSCD
2018年第11期120-124,共5页
Measurement & Control Technology
关键词
无线电能传输
磁耦合
耦合距离
传输效率
wireless power transmission
magnetic coupling
coupling distance
transmission efficiency
