基于电磁感应的无线充电装置的设计

Design of Wireless Charging Device Based on Electromagnetic Induction

本文采用电磁感应方式,通过多谐振荡电路生成PWM脉冲信号,随后用场效应管驱动发射线圈,把变化电场转换成变化磁场,发射线圈通过耦合得到磁场能量转换成变化的电场,再经整流滤波稳压电路给负载的用电设备提供稳定的5V直流电压。整个设计过程对参数做了进一步设定,测试输出端在0.4A负载情况下,最大的供电效率为56%。这为进一步研究和设计无线充电设备以及更广阔无线电能传输设备提供方案。

In this paper,electromagnetic induction is used to generate PWM pulse signals through multi-resonance circuits,and then a field effect tube is used to drive the transmitting coil to convert the changing electric field into a changing magnetic field.The magnetic field energy obtained by the transmitting coil is converted into a changing electric field through coupling,and then rectified and filtered.The voltage stabilizing circuit provides a stable 5V DC voltage to the electrical equipment of the load.The parameters were further set during the whole design process,and the maximum power supply efficiency was 56%when the test output was under 0.4A load.This provides solutions for further research and design of wireless charging equipment and broader wireless power transmission equipment.