基于改进粒子群算法的无线电能传输高频阻抗数值研究

为提升磁谐振式无线电能传输系统传输精度和传输效率，需研究磁谐振式无线电能传输过程高频阻抗特性。依据最大功率传输原则，获取阻抗匹配适应值函数，通过适应值函数，得到匹配高频阻抗实部和虚部，从电容值实时调整的角度出发，更新粒子速度和位置，混沌局部搜索最优粒子；采用惩罚函数处理越界粒子，依照最终获取的最优粒子调整无线电能传输系统中电容数值，使调整后无线电能传输系统高频阻抗和适应度函数获取高频阻抗数值一致，实现对无线电能传输系统中高频阻抗匹配。实验分析发现，采用该方法匹配高频阻抗后无线电能传输精度最高可达96.59%。

Numerical Study on High-frequency Impedance of Wireless Power Transfer Based on Improved Particle Swarm Optimization Algorithm

In order to improve the transmission accuracy and transmission efficiency of the magnetic resonance wireless power transmission system, the high-frequency impedance characteristics of the magnetic resonance wireless power transmission process need to be studied. According to the principle of maximum power transmission, the adaptive value function of impedance matching is obtained. Through the adaptive value function, the real and imaginary parts of the high-frequency impedance are matched. From the perspective of real-time adjustment of the capacitance value, the particle speed and position are updated, and the chaotic local search for the optimal particle ; Use the penalty function to deal with the particles outside the boundary, adjust the capacitance value in the wireless energy transmission system according to the optimal particle finally obtained, so that the adjusted high-frequency impedance of the wireless energy transmission system and the fitness function to obtain the high-frequency impedance value are consistent, and realize the wireless energy transmission High-frequency impedance matching in the system. Experimental analysis found that the accuracy of wireless energy transmission can reach 96.59% after matching high-frequency impedance with this method.