电动汽车无线反馈非接触充电电路设计

Contactless Charging Circuit With Wireless Feedback for Electric Vehicle

给出一种具有无线反馈全桥非接触电动汽车充电电路。非接触充电电路初级线圈向电动汽车底盘上的次级线圈传递电能。无线反馈电路将负载电压的取样信号无线反馈到非接触充电电路中初级电路的控制端,通过系统自动调节,改变初级电路全桥变换器的占空比,使输出功率稳定在设定值。此外,该电路还具有智能检测电池电量、自动投入充电、浮充和停充功能。仿真与实验证明了电路的可行性。

A full-bridge contactless charging circuit with wireless feedback for electric car is given.The primary side of the contactless recharging circuit transfers electricity to secondary side of electric car chassis coil.Wireless feed- back circuit puts load voltage signal feedback to the control circuit of contactless charging primary side, the system automatically adjusts full-bridge converter circuit＇s duty cycle,to make the output power stability.In addition,the cir- cuit detects the battery power intelligently, automatic into charging,floating filling and stop filling function.Simulation and experiments show the circuit is feasible.