基于DS-LCC拓扑抗偏移性的建模与优化

针对无线电能传输(WPT)系统中线圈偏移导致功率及效率波动问题，提出基于双边LCC(DS-LCC)拓扑WPT系统的改进模型。首先，对该模型进行传输特性分析，推导出不同横向偏移条件下线圈互感与传输特性间对应的函数式。其次，引入归一化方法并确定偏移后线圈匝数与耦合强度及线圈内阻的线性关系。在上述基础上通过对系统进行参数优化设计，实现特定横向偏移范围内系统输出功率和传输效率抗偏移性的提升。最后，搭建一台100 W的实验样机对理论分析进行验证。结果显示在0~20 cm的横向偏移范围内系统的输出功率始终高于80 W，传输效率始终高于70%。

Modeling and optimization of anti-offset based on DS-LCC topology

There is a problem of power and efficiency fluctuations caused by coil offset in a wireless power transmission (WPT) system. Thus this paper proposes an improved model of the WPT system based on bilateral LCC (DS-LCC) topology. First, it analyzes the transmission characteristics of the model, and derives the corresponding functional formulae between the coil mutual inductance and the transmission characteristics under different lateral offset conditions. Secondly, a normalization method is introduced and the linear relationship between the number of coil turns and the coupling strength and the internal resistance of the coil after the offset is determined. By optimizing the design of the system parameters, the system output power and transmission efficiency anti-offset within a specific lateral offset range are improved. Finally, a 100 W experimental prototype is built to verify the theoretical analysis. The results show that the output power of the system is always higher than 80 W within the lateral offset range of 0-20 cm, and the transmission efficiency is always higher than 70%. This work is supported by Shanghai Natural Science Foundation Project (No. 21ZR1425300).