基于电磁感应式无线充电的电路设计与应用研究

Circuit Design and A pplication Research of Wireless Charging Based on Electromagnetic Induction

随着电子设备的不断更新换代及日常使用率的增加,设备功耗越来越大,充电周期越来越频繁。传统的充电线布线复杂,插头频繁插拔容易造成磨损、产生电火花从而产生安全隐患。针对此类弊端,设计了一种基于磁耦合的无线充电传输系统。发射端使用H桥逆变器和振荡电容产生周期性交变信号,通过线圈将电能传.输到接收端,经过整流后供负载使用。实验发射板采用140 kHz开关频率,50%的占空比,接收板接负载仪,进行带载实验。实验效果良好,电能转换效率高,带载稳定,从而验证了设计系统的可行性和可靠性。

With the continuous upgrading of electronic equipment,and the increase in daily use rate.The power consumption of the equipment is increasing,and the charging cycle becomes more and more frequent,the wiring of traditional charging cables is complicated,and frequent plugging and unplugging of plugs may easily cause abrasion and sparks,which may cause safety hazards.Aiming at such drawbacks,a wireless charging transmission system based on magnetic coupling is designed.The transmitter board uses an H-bridge inverter and an oscillating capacitor to generate periodic alternating signals which are transmitted to the receiving board through the coil,and is used by the load after rectification.The experimental transmitter board uses 140 kHz switching frequency,50% duty cycle,and the receiving board is connected to a load meter to carry out the on-load experiment.The experimental results are good,the power conversion efficiency is high,and the load is stable,so the feasibility and reliability of the design system are verified.