基于“88Q”线圈的三维抗偏移WPT系统

Three-dimensional Anti-offset WPT System Based on“88Q”Coil

针对谐振式无线电能传输(WPT)系统在传输距离和负载变化时引起输出电压不稳定的问题,提出一种“88Q”线圈耦合装置,结合LCC/S与S/LCC型负载无关恒压谐振拓扑可实现平面线圈的三维抗偏移恒压输出。给出了“88Q”线圈的空间位置和特征参数,分析线圈激发磁场的分布特性、线圈水平偏移和改变传输距离情况下线圈互感变化趋势。最后,搭建系统实验平台。实验结果表明,系统负载变化或耦合装置发生偏移时,均可实现恒压输出。

To solve the problem that the output voltage of resonant wireless power transmission(WPT)system is unstable when the transmission distance and load change,an“88Q”coil coupling device is proposed.Combining LCC/S and S/LCC load independent constant voltage resonant topology,the three-dimensional anti-offset constant voltage output of planar coil is realized.The spatial position and characteristic parameters of“88Q”coil are given.The distribution characteristics of the excitation magnetic field,the horizontal deviation of coil and the variation trend of coil mutual inductance when changing distance are analyzed.Finally,the system experimental platform is built.The experimental results show constant voltage output can be achieved when the system load changes or the coupling device shifts.