多方位无线电能传输耦合机构设计与分析

Design and Analysis of Multi-directional WPT Coupling Mechanism

针对传统的多方位无线电能传输耦合机构常采用xyz正交圆线圈结构,需要3个电源且充电区域受线圈结构限制的问题,提出1种新型多方位无线电能传输耦合机构,该机构由2组8字型线圈和1组圆形线圈组合而成,整体呈现5个不同方位的圆环状,仅需单电源供电。对基于S-S型发射端拓扑进行了改进,通过对电路的操控改变线圈磁场分布,实现了线圈的内、外部电能传输,拓宽了充电区域。基于线圈结构,建立了该耦合机构的数学模型,推导出任意空间位置的互感和效率计算式。通过仿真和试验确定了该耦合机构的最佳工作区域。

The traditional coupling mechanism of multi-directional wireless power transfer(WPT)often adopts an xyz orthogonal circular coil structure,which requires three power supplies and has a charging area limited by the coil structure.To solve this problem,a novel multi-directional WPT coupling mechanism composed of two groups of 8-shaped coils and one group of circular coils is proposed.It presents five circular rings in different directions as a whole and only needs one single power supply.Based on the S-S type transmitter topology,the magnetic field distribution in the coil is changed by controlling the circuit,thus realizing power transfer inside and outside the coil and broadening the charging area.Based on the coil structure,a mathematical model of the proposed coupling mechanism is established,and the calculation formulas for mutual inductance and efficiency at any spatial position are derived.The best working area of the coupling mechanism is determined according to simulation and experimental results.