摘要
含有中继线圈的三线圈WPT系统可以提高系统的传输距离和传输效率,但在现有的补偿网络结构分析中未考虑非相邻线圈间的耦合影响(交叉耦合效应)。本文基于耦合电感模型分析并建立了传统自感谐振式SSS补偿结构的三线圈WPT磁耦合系统的数学模型。该补偿方法中输出特性存在交叉耦合问题,恶化系统的输出恒压特性,且该模型组成复杂,难以对磁耦合系统的其它补偿网络结构及参数确定方法进行分析。因而,本文提出了利用变压器T网络模型来进行三线圈WPT磁耦合系统建模的新方法。该模型将所有的系统参数转化为变压器的原副边漏感、激磁电感和等效变比,实现三线圈间的电感解耦。并基于变压器T网络模型的多解性和等效漏感补偿理论,提出了SSS、SS/SP补偿结构及参数确定方法。该方法在磁耦合系统不变的情况下,通过补偿电容及等效变比的设计可以获得可变增益恒压输出特性。该方法设计思路清晰,模型简单,有助于拓宽输出电压增益范围。
The three-coil wPT system with relay coil can improve the transmission distance and transmission efficiency of the system.However,the influence of inductive coupling between non-adjacent coils(Cross Coupling Effect)was not considered in the existing compensation network structure analysis.Based on the coupled inductance model,this paper analyzes and establishes the mathematical model of the magnetic coupling system of three-coil wPT with traditional Sss compensation structure.The cross coupling problem exists in the output characteristics of the compensation method,which worsens the output constant voltage characteristics of the system.Moreover,the composition of the model is complex.It is difficult to analyze the other compensation network structure and parameter determination methods of the magnetic coupling system.Therefore,this paper proposes a new method to model the magnetic coupling system of three-coil wPT by using transformer T-network model.In this model,all system parameters are transformed to the primary and secondary side leakage inductance,excitation inductance and equivalent transformation ratio of the transformer to achieve inductance decoupling among three coils.Based on the multi-solutions of transformer T-network model and the equivalent leakage inductance compensation theory,the SS,SS/SP compensation structure and parameter determination method of are proposed.In this method,the variable gain and constant voltage output characteristics can be obtained by designing the compensation capacitance and equivalent transformation ratio under the condition that the magnetic coupling system remains unchanged.The design idea of this method is clear and the model is simple,which is helpful to broaden the range of output voltage gain.
作者
杨丰钢
陈庆彬
陈为
Yang-fenggang;Chen-Qingbin;Chen-Wei(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108)
出处
《磁性元件与电源》
2023年第6期167-175,共9页
Components and Power
关键词
中继线圈
磁耦合系统
变压器T网络等效模型
可变增益恒压输出
relay coil
magnetic coupled system
transformer T-network equivalent model
variable gain constant voltage output
