基于漏感补偿的可变恒流输出补偿网络参数确定方法及其特性分析

摘要

基于变压器T网络模型中等效参数的多解性和漏感补偿原理,提出对给定的磁耦合系统通过补偿参数设计使 WPT 系统实现可变恒流输出的新思路.利用电路理论分析不同等效电压比 n 下使 WPT 系统获得不同的转移导纳的机理和参数确定方法.同时对考虑磁耦合系统线圈电阻影响的补偿参数确定方法及其频率偏移特性进行了理论建模及分析,指出当等效电压比n减小时,其参数敏感度均会降低,有助于提高WPT系统的负载调整率.最后构建了WPT的实验平台,实验结果证明了理论分析的正确性.%In this paper a new idea is proposed according to which variable constant output current can be got by compensation network parameters design for a given magnetic coupling system based on the multi-solutions of the transformer T model and the leakage inductance compensation theory. And the principle and the parameters calculation method of compensation network with different variable transfer admittance were analyzed based on electrical circuit theory. Also, the parameters design method with the consideration of the winding resistance and its frequency shifts characteristics were modeled and analyzed. The results show when the equivalent ratio n decreases the sensitive of the parameters decreases too, which can improve the load adjustment of the wireless power transfer (WPT). Finally, the prototype was constructed and the experiment results verified the theory analysis to be correct.