基于Qi标准的无线充电器研究

Researchon Wireless Charger Based on Qi Standard

研究了基于Qi标准的电磁感应式无线电能传输原理及通信协议,提出了一种利用STM8单片机设计符合Qi标准的无线充电器的方法。该方法利用单片机灵活扩展性,可方便嵌入到其它设备当中。通过设计高频逆变谐振电路、信号解调电路及电压与电流检测电路,并根据通信过程编写程序及制作样机。经对样机在不同负载下进行充电性能测试,结果表明可以实现66%以上的充电效率。

Electromagnetic induction type radio transmission principle and communication protocol based on the Qi standard were studied, and a design method of wireless charger based on STM8 MCU with the Qi standard was proposed. The flexibility and extensibility of MCU enables it to be easily embedded into other equipment. By designing high-frequency inverter circuit, signal demodulating circuit and voltage and current detection circuit and programming according to communication process, a prototype was made. The performance of the prototype was tested under different loads. The results show that the charging efficiency can be as high as more than 66%.