两线圈磁耦合谐振式无线电能传输的效率研究

摘要

传输效率是无线电能传输研究的关键问题之一,研究影响传输效率的因素是提高效率的重要前提.首先基于所设计的磁耦合谐振式两线圈无线电能传输装置进行建模和分析,得出影响传输效率因素的解析表达式;然后进一步采用控制变量法并借助于MATLAB仿真得出效率与谐振频率、线圈互感、传输距离、负载阻抗之间关系的仿真曲线;最后在所设计的实验装置上进行不同条件下的传输效率测试试验,并与理论分析和仿真结果进行了对比和分析.研究结果可为提高传输效率、优化系统结构提供重要理论依据.%Transmission efficiency is one of the key problems for wireless power energy transmission;study on factors affecting transmission efficiency is the important premise for improving efficiency.It builds model and analyze them on the basis of the designed double coils magnetic coupling resonant type wireless power energy transmitting set,so analytical formulas is concluded which affects the efficiency.Further,with MATLAB simulation,variable-controlling approach was used to get the curve between the efficiency and resonant frequency,coil mutual-inductance,transmitting distance and load impedance.Finally,transmission efficiency testing experiment under different conditions was applied in the designed experimental facility,and compared and analyzed theoretical analysis and simulated result.The studied result provides important theoretical basis for improving the efficiency.