基于频移键控的无线电能与数据共同传输方法

Wireless power and data transfer method based on frequency shift keying

无线电能与数据共同传输技术可在传输能量的同时实现信息交互,近年来被广泛研究。采用二进制频移键控(2FSK)的方式将数据调制到能量传输通道,通过改变逆变器工作在两个不同的频率实现二进制信息的调制。数据解调电路利用锁相环的频率跟踪特性实现信息的提取,即相位锁定时可以输出有效信号,不能锁定时可以输出电平相反的信号。通过构建原理样机,验证了无线电能与数据共同传输技术的有效性。实验结果表明,提出的无线电能传输方法可以在电能正常传输的同时实现10 kb/s的通信速率,且能量传输从几十瓦到几百瓦变化时通信性能不受影响。

Wireless power and data transmission technology can transmit information while energy is transmitted wirelessly,so it has been widely studied in recent years.In this paper,binary frequency shift keying(2FSK)is used to modulate the data to the energy transmission channel.The modulation of binary information can be achieved by changing the working frequency of the inverter.The frequency tracking characteristics of the phase-locked loop are used in data demodulation,that is,when the phase is locked,it can output effective signals,and when it cannot be locked,it can output signals with opposite levels.The effectiveness of the wireless power and data transmission technology is verified by the prototype.The wireless power transmission method proposed in this paper can achieve the communication rate with 10 kb/s while the power transmission is normal,and the communication performance will not be affected when the power transmission is changed from tens of watts to hundreds of watts.