基于多绕组变压器的高压无线充电自由定位系统

针对电动车辆无线电能传输(wireless power transfer, WPT)系统存在的半导体性能有限和定位困难的问题，提出了一种多对一高压无线充电自由定位系统。该系统采用逆变器串联输入的设计来适应高压应用场景，同时利用多绕组变压器实现逆变器的等效并联输出和向多路发射回路传输电能的功能，并采用了多对一的设计以扩大电动车的定位范围以实现无线充电的自由定位功能。为分析多绕组变压器的工作机理和研究多对一拓扑的能量传输特性，进行了等效电路分析和MATLAB仿真，并制作实验室原型样机进行了实验验证。基于实验和仿真结果，提出了一种基于多对一WPT拓扑的混合工作模式，可以有效地扩大电动车辆无线充电时的定位范围。研究和分析表明，文中所提出的拓扑结构可以有效地提高系统的输入电压以应用于高压场景，并能有效扩大电动车辆无线充电时的定位范围以实现自由定位。

High-voltage wireless charging free positioning system based on a multi-winding transformer

Aiming at the problems of limited semiconductor performance and positioning difficulties in the wireless power transfer (WPT) system of electric vehicles, this paper proposes a many-to-one high-voltage wireless charging free positioning system. The system adopts the design of inverter series input to adapt to high-voltage application scenarios. At the same time, it uses a multi-winding transformer to realize the equivalent parallel output of inverters and the function of transmitting electric energy to primary loops. It also adopts a many-to-one design to expand the positioning range of electric vehicles to realize the free positioning function of wireless charging. In order to analyze the working mechanism of the multi-winding transformer and study the energy transmission characteristics of the many-to-one topology, this paper carried out equivalent circuit analysis and Matlab simulation, and made a laboratory prototype for experimental verification. Based on the experimental and simulation results, this paper proposes a hybrid operating mode based on many-to-one WPT topology, which can effectively expand the positioning range of electric vehicles during wireless charging. Research and analysis show that the topology proposed in this paper can effectively increase the input voltage of the system for high-voltage scenarios, and can effectively expand the positioning range of electric vehicles during wireless charging to achieve free positioning.