基于S-P结构的非线性宇称时间对称分析

基于非线性宇称时间对称的无线电能传输系统，是一种能在一定耦合区间内保持恒定高效率传输的鲁棒性系统。宇称-时间对称(PT对称)无线电能传输系统，能够在较大范围内实现对耦合谐振线圈位置的不敏感性，在该区间内可对负载进行恒定的功率传输。基于耦合模理论对S-P型结构的PT对称无线电能传输电路进行分析，观察其在不同耦合区间内系统的传输效率随耦合系数的变化情况进行分析。最后通过matlab等软件进行仿真，结果表明在强耦合区域内系统传输效率不随耦合系数变化而变化，且能保持高效传输，在弱耦合区域耦合系数对系统的传输效率有很大的影响。

Time symmetry analysis of nonlinear parity based on S-P structure

The wireless power transmission system based on nonlinear parity time symmetry is a robust system that can maintain constant high-efficiency transmission within a certain coupling interval. The parity-time symmetry (PT symmetry) wireless power transmission system can achieve insensitivity to the position of the coupled resonant coil over a wode range, and can perform constant power transmission of the load within this range. Based on the coupled mode theory, the PT symmetric wireless power transmission circuit with S-P structure was analyzed, and the change of the transmission efficiency of the system with the coupling coefficient in different coupling intervals was observed and analyzed. Finally, simulation was carried out with softwares such as Matlab. Results show that the transmission efficiency of the system does not change with the coupling coefficient in the strong coupling region, and can maintain high-efficiency transmission. In the weak coupling region, the coupling coefficient has a great impact on the transmission efficiency of the system.