频率分叉现象对无线电能传输系统的影响

The effect of frequency bifurcation phenomenon on wireless power transmission system

针对磁耦合感应式无线电能传输技术中频率分叉对输出特性的影响,首先利用Matlab仿真分析了频率分叉反映参数、传输效率和耦合因数、失谐因子的关系,然后分析了有效传输距离的影响因素。结果表明,当磁耦合感应式无线电能传输技术工作在临界耦合状态、主谐振频率处或过耦合状态、从谐振频率处时,频率分叉反映参数最大,当其工作在主谐振频率处时传输效率最大。且其有效传输距离与谐振线圈的半径和匝数成正比。

Mming at influence of frequency bifurcation on output characteristics in magnetic-coupled inductive wireless power transmission technology, the relationship between frequency bifurcation reflection parameters, transmission efficieney, coupling factor and dissonance factor is analyzed and simulated by MATLAB, and the influence factors of eflective transmission distance are analyzed. The results show that the frequency bifurcation reflection parameters is the largest when the magnetically coupled induction wireless power transmission technology working at the critical coupling state, the main resonant frequency or the over-coupling state and deputy- resonant frequency. Transmission efficiency is the largest when working at the main resonance frequency. And its effective transmission distance is proportional to the radius and turns of the resonant coil.