针对宇称时间(parity-time,PT)对称多线圈并联无线电能传输(wireless power transfer,WPT)系统参数相互关联,系统参数配置困难,提出一种基于PT对称的多线圈并联WPT系统参数优化设计方法.建立基于PT对称多线圈并联WPT系统数学模型,给出系统输出功率、传输效率以及有效传输距离的一般性影响规律表达式.采用一种非线性规划和遗传算法相结合的优化方法,以输出功率为目标函数,以传输效率和有效传输距离为约束条件,对系统发射-接受线圈数及谐振参数进行寻优.根据优化结果搭建实验样机,实验结果表明系统在满足所需传输效率及有效传输距离下,系统功率输出达到设计要求,验证了理论分析和优化方法的有效性.
Parameter optimization of PT symmetry multi-coil parallel wireless power transfer system
The parameters of Parity-Time (PT) symmetry multi-coil parallel wireless power transfer (WPT) system are interrelated and to configure them is difficult.This paper proposes a PT symmetry-based multi-coil parallel wireless power transfer system parameter optimization design method.First, a mathematical model of PT-symmetric multi-coil parallel WPT system is built, and the general influence law expressions of system output power, transmission efficiency and effective transmission distance are given.Second, an optimization method combining nonlinear programming and genetic algorithm is adopted to optimize the number of transmitter-receiver coils and resonance parameters of the system with the output power as the objective function and the transmission efficiency and effective transmission distance as the constraints.Finally, an experimental prototype is built according to the optimization results.Our experimental results show the system power output meets the design requirements under the required transmission efficiency and effective transmission distance, demonstrating the effectiveness of the theoretical analysis and optimization method.
PT symmetrymultiple coils in parallelnonlinear programming genetic algorithmoutput powertransfer efficiencyeffective transfer distance
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