一种新型空间无线电能传输系统耦合机构设计

Design of new space wireless power transmission system coupling mechanism

传统正对平面线圈在进行无线电能传输时其电能拾取效率会随耦合机构间相对偏移的角度增大而迅速降低,空间无线电能传输系统则可以很好地解决这个问题。虽然目前国内外空间无线电能传输系统的耦合机构解决了相对偏移的问题,但接收机构只能以特定的轨迹和绕行方式进行相对均匀的功率接收,并非真正意义上的高自由度。本文提出了一种新型的空间无线电能传输系统的耦合机构,该耦合机构由单电源供电,可以实现接收机构高自由度且均匀的功率拾取。提出低耦合路径理论用于分析发射机构,利用Ansys Maxwell进行磁场仿真验证了磁场的均匀度。通过提出低耦合区域理论选取最适合发射机构的接收机构。最后搭建实验平台对耦合机构能量传输的均匀度和自由度进行了验证,实验结果说明接收线圈在保证高自由度接收的前提下接收电压数据集标准差小于1,即系统可以进行高自由度且较为稳定的功率传输。

The power pickup efficiency of the conventional forward pair planar coils decreases rapidly with the increase of the relative offset angle between the coupling mechanisms.The space radio energy transmission system can solve this problem well.Although the coupling mechanism of space radio energy transmission systems at home and abroad solves the problem of relative deviation,the receiving mechanism can only receive relatively uniform power with specific trajectory and detour mode,and it is not a high degree of freedom in the real sense.Therefore,a new coupling mechanism of wireless power transmission system is proposed in this paper.The coupling mechanism is powered by a single power source,which can realize high degree of freedom and uniform power pickup of the receiving mechanism.The low coupling path theory is proposed to analyze the transmitting mechanism,and the magnetic field uniformity is verified by Ansys Maxwell magnetic field simulation.The receiver mechanism which is most suitable for transmitting mechanism is selected by the low coupling region theory.Finally,an experimental platform was built to verify the uniformity and freedom of power transmission of the coupling mechanism.The experimental results show that the standard deviation of the receiving voltage data set is less than 1 on the premise of ensuring the receiving coil to receive with high degree of freedom,that is,the system could carry out a relatively stable power transmission with high degree of freedom.