基于电磁联合仿真非对称线圈谐振式无线电能传输系统研究

Research on asymmetrical coil resonant wireless power transmission system based on electric-magnetic joint simulation

在某些特殊应用场合下,无线电能传输系统要求接收装置尽可能小型化,使接收线圈与发射线圈具有不对称结构。针对非对称结构线圈的磁场均匀性问题和线圈产生不同偏置的非线性问题展开研究。根据电路理论与磁耦合无线电能传输系统的电路模型,分析系统电气参数对传输性能的影响;运用ANSYS Maxwell建立磁场线圈模型,探明增加串联小线圈方法可以实现相对均匀磁场分布,增强磁场强度;建立多种偏置下非对称线圈模型,将模型导入到ANSYS Simplorer电路软件中,通过线圈与电路联合仿真,得出串联内置线圈的非对称线圈偏置对传输效率的影响,便于非对称线圈谐振式无线电能传输系统的非线性设计与优化。

In some special applications,the wireless power transmission system requires the receiving device to be miniaturized as much as possible,resulting in an asymmetric structure between the receiving coil and the transmitting coil.This article focuses on the uniformity of the magnetic fields of asymmetrical coils and the non-linear problems of coils with different biases.First,according to the circuit theory and the circuit model of the magnetic coupling wireless power transmission system,the influence of the electrical parameters of the system on the transmission performance is analyzed;secondly,the ANSYS Maxwell software is used to establish the magnetic field coil model,and it is proven that adding small coils in series can achieve the relatively uniform magnetic field distribution and enhance the magnetic field strength;finally,the asymmetric coil model under multiple biases is established,and the model is imported into the ANSYS Simplorer circuit software.Through the joint simulation of the coil and the circuit,the influence of the asymmetric coil bias of the series built-in coil on the transmission efficiency is studied.It is convenient for the nonlinear design and optimization of the asymmetric coil resonance wireless power transmission system.