一种简易型小功率无线电能传输系统的研究与设计

Study and Design of a Low Power Wireless Power Transfer System

摘要: 本文设计了一种基于电磁感应原理的无线充电系统，电磁感应耦合充电可以实现电能从电能发射侧到电能接收侧的无线传输。基于这种方式的无线电能传输系统主要有六个部分，包括变压、整流滤波、稳压、PWM、发射和接收。本设计收发线圈可以随意移动，并且设计的电路比较简单，也很容易实现，这种设计比较适用于一些对于距离传输不是要求很高的地方。通过测试，能够在几厘米的范围内进行电能传输并获得比较稳定的电压，传输效率高达70%，具有很好的实用价值。

Abstract: A wireless power charging system is proposed in this paper. Based on the theory of electromagnetism induction, the power transfers from source coil to load coil without metallic contact. The designed system includes the following components: Voltage transformation, rectifier filter, voltage stabilization, PWM, transmission and reception. The designed device could be moved without limit and the design of the circuit is relatively simple and very easy to achieve. As the experimental results show, with an air gap of centimeter level, the transfer efficiency is up to 70%.