电动汽车动态无线充电系统弯道互感跌落研究及改进OA北大核心

At present,the transmitting coil in a dynamic wireless charging system for electric vehicles usually adopts a segmented guide rail structure to realize the relay dynamic wireless charging.However,the problem of mutual inductance drop will occur at the switching of the guide rail and result in the reduction of the system transmission efficiency,and this is more prominent at the corner.A corner dynamic wireless charging model was established,and the relationship between the mutual inductance of primary and secondary coils and the deflection angle was deduced through theoretical analysis.An improved structure of the guide rail transmitting coil at the corner was proposed and simulated,and a corner dynamic wireless charging platform based on resonance magnetic coupling was built.Simulation and experimental results show that by using the improved guide rail transmitting coil structure,the mutual inductance drop of the wireless charging system was significantly reduced,and the system transmission efficiency was improved by 8.66%at the maximum deflection angle,thereby verifying the effectiveness of the improved coil structure.