谐振式无线供电技术在无线传感网中的应用研究

Research on Wireless Power Supply Technology via Magnetic Coupling Resonance for Wireless Sensor Networks

为了研究无线传感网的磁耦合谐振式无线供电技术,根据电路理论,建立了单线圈发射3个线圈接收的电路模型,同时推导和研究了负载电压、传输效率等传输特性与谐振频率、负载电阻、各线圈间的互感系数的关系。利用传输特性公式,通过Matlab仿真,确定了各线圈的电感值,分析了线圈电感值、传输距离和负载电阻值对传输特性的影响。最后通过无线传感网的无线供电实验验证了理论推导和仿真分析的正确性,为电网的无线传感网的谐振式无线供电技术提供了一定依据。

In order to study the key technologies of wireless power supply via magnetic coupling resonance for wireless sensor networks （WSN）, based on the theory of circuit, the circuit model of resonance system with sin- gle-emission and three-receiving coil is established, at the same time, the relationship between the transmission characteristics such as load voltage and transmission efficiency and the resonant frequency, load resistance and mutual inductance between coils, is derivated and studied. Based on the transmission characteristic formula, through Matlab simulation, the inductance value of each coil is determined and the impacts of coil inductance value, transmission distance and load resistance on transmission efficiency are researched. Finally, the correct- ness of theoretical derivation and simulation analysis is verified by wireless power supply experiment for WSN, which provides a certain basis for wireless power supply via magnetic coupling resonance for WSN of the power grid.