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.
关键词
无线电能传输/耦合机构/多方位/互感/传输效率
Key words
Wireless power transfer(WPT)/coupling mechanism/multi-directional/mutual inductance/transfer efficiency
维普
万方数据