非接触电能双向推送模式研究

Study on Contactless Power Bi-directional Push Mode

在非接触电能传输系统中,由于电能单向传输特性,系统存在电能回馈困难、系统开环运行效率低等问题。提出一种非接触电能双向推送模式,用于完成电能发射端与接收端的双向直接转换。在此模式中,能量发射及接收端具有对称结构,既可工作于磁场激发模式也可工作于磁场接收模式,以满足能量双向传输的需求。在此基础上,提出一种基于谐振软开关的双向电能高频变换拓扑,并建立能量注入与自治振荡双工作模式,实现传输功率的动态调节。提出了电能变换拓扑的谐振环节参数设计方法并构建状态空间模型。通过仿真及实验研究,证明了非接触电能双向推送模式的可行性。

In contactless power transfer system,attribute to unidirectional energy transfer,there are many problems such as energy feedback difficultly and low efficiency brought by system open-loop running.A novel contactless energy bi-directional push mode was developed to realize direct conversion between energy transmitter and receiver.In the mode,the energy transmitter and receiver had symmetric structure and could operate as either magnetic field excitation source or power sink to fulfill the energy bi-directional transfer requirement.Furthermore,with resonant soft-switched technology,a bi-directional conversion circuit topology was proposed.The working process of this topology was also presented.In the topology,energy injection mode and autonomous running mode were developed respectively for dynamic transferred power regulation.The maximum power transfer capability and operating frequency design method were put forwards.This paper set up system equivalent circuit model and corresponding state-space model under energy injection and autonomous running mode respectively.The simulation and experimental results verify feasibility of the contactless energy bi-directional push mode.