SummaryRectifier load in inductive power transfer system has nonlinear characteristics. However, the traditional analysis method equates it to a pure resistor, which leads to a certain deviation between the theoretical analysis and the actual circuit. This will reduce the accuracy of the inductive power transfer (IPT) system model and affect the soft switching operation of the inverter. In this paper, the IPT system with S‐type topology on the secondary side is studied. Firstly, the resistance–inductance characteristics of the rectifier load are analyzed by simulation, and then a second‐order circuit response model is established to solve the time‐domain expression of voltage and current. Then, the fundamental component of voltage and current is extracted by Fourier transform to calculate the impedance value of the rectifier load, and the mathematical calculation model of the rectifier load is established. On this basis, the influence of the inductive component of the rectifier load on the input impedance of the IPT system is analyzed. Then, a parameter design method for zero voltage switching is proposed for S‐S and LCC‐S topologies. Finally, an experimental platform of S‐S and LCC‐S IPT system is built. The correctness and effectiveness of the theoretical analysis and the proposed parameter design method are verified by experiments.

中文翻译：

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二次侧S型拓扑感应电能传输系统的整流器负载建模和零电压开关设计

摘要感应电能传输系统中的整流负载具有非线性特性。但传统的分析方法将其等同于纯电阻，导致理论分析与实际电路存在一定偏差。这将降低感应电能传输（IPT）系统模型的精度并影响逆变器的软开关操作。本文研究了二次侧S型拓扑的IPT系统。首先通过仿真分析整流负载的阻感特性，然后建立二阶电路响应模型来求解电压和电流的时域表达式。然后，通过傅里叶变换提取电压和电流的基波分量，计算整流负载的阻抗值，建立整流负载的数学计算模型。在此基础上，分析了整流负载的感性成分对IPT系统输入阻抗的影响。然后，针对 S-S 和 LCC-S 拓扑提出了一种零电压开关参数设计方法。最后搭建了S-S和LCC-S IPT系统实验平台。通过实验验证了理论分析和所提出的参数设计方法的正确性和有效性。