Simultaneous Wireless Power and Information Transfer Based on Phase-Shift Modulation in ICPT System
Simultaneous Wireless Power and Information Transfer Based on Phase-Shift Modulation in ICPT System
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DOI：
10.1109/tec.2020.3026751
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发表时间：
2021-06
影响因子：
4.9
通讯作者：
C. Xia;Renhai Jia;Yuntong Shi;A. Hu;Yan Zhou
中科院分区：
文献类型：
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作者：
C. Xia;Renhai Jia;Yuntong Shi;A. Hu;Yan Zhou
与传统的同步无线电力和信息传输（SWPIT）技术相比，利用逆变器的输出谐波分量作为信号载体的通信技术可以在不影响电力传输的情况下实现高性能的信号传输。提出了一种基于移相调制的感应耦合电能传输（ICPT）系统中的SWPIT技术。通过改变逆变器的相位角，在初级线圈上产生梯形波电流，在次级侧增加选频电路，将基波和谐波电流分离。基波分量电流用于无线功率传输，而谐波电流用于传输信号。首先分析了ICPT系统中基于移相调制的SWPIT系统的结构和工作原理。然后建立了系统的等值模型，并对无功功率进行了深入的分析。接下来，通过串扰分析来确定相位角变化范围。最后，在50 W的实验平台上验证了该技术的正确性和有效性。实验结果表明，该系统能够稳定地传输电能和信息，输出电压波动小于3%，信号传输速率可达6 kbps。
Compared to traditional simultaneous wireless power and information transfer (SWPIT) technologies, communication technology utilizing the output harmonic component of an inverter as a signal carrier can achieve high-performance signal transmission without affecting power transmission. The SWPIT technology based on phase-shift modulation in inductively coupled power transfer (ICPT) system is proposed in this article. By changing the phase angle of the inverter, a trapezoidal wave current is generated on the primary coil, and a frequency selection circuit is added on the secondary side to separate the fundamental and harmonic currents. The fundamental component current is used for wireless power transfer while the harmonic current is used to transmit the signal. Firstly, the structure and working principle of SWPIT system based on phase-shift modulation in ICPT system are analyzed. Then, a system equivalent model is established and the reactive power is analyzed in depth. Next, the phase angle variation range is determined by crosstalk analysis. Finally, the correctness and effectiveness of the proposed technology are verified with an experimental platform at 50 W. The experimental results demonstrate that the power and information can be transmitted stably with output voltage fluctuation less than 3%, and the signal transmission rate up to 6 kbps.