电磁耦合共振式无线充电系统设计与实现

Electromagnetic coupling resonant wireless charging system design and implementation

本文利用电磁耦合共振技术实现手线充电技术方案,设计了无线充电器总体方案.主要包括了发送端和接收端两部分,其中发射端电路使用NE555芯片产生占空比可调的高频PWM波来控制开关管驱动发射电感线圈,实现电能到磁能的转化;接收端则通过接收电感线圈将不断变化地磁信号转换为交流电信号,随后通过整流、滤波、稳压等处理,使电路末端输出为5.1V的直流电压进行无线充电.同时在Multisim平台上搭建了电路模型并进行电路仿真,验证了其可行性.对实际电路进行电路实验和分析,验证了该设计的正确性.

In order to realize the wireless charging technology,the thesis has taken electromagnetic coupling resonant technology as the core wireless cell phone’s circuit structure. The design is consisted of transmitter and receiver. The transmitter generates adjustable duty cycle of PWM signal by NE555 chip to drive transmitter’s inductor by controlling MOSFET switch, so as to convert electric energy into magnetic energy. The receiver receives ever-changing magnetic signal and turn it into AC signal, and then processes it by rectifier, filter and regulator to output 5.1V voltage charging the cell phone. In the end of the thesis, it introduces how to set up the circuit model and to simulate it in the platform of Multisim, and it provides some analysis about the practical circuit’s experiment to proof the design is correct.