Synchronous Rectification-Based Phase Shift Keying Communication for Wireless Power Transfer Systems

Hongchang Li, Shuxin Chen, Jingyang Fang, Yi Tang
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引用次数: 4

Abstract

The receiver-to-transmitter communication in a wireless power transfer (WPT) system plays an important role in the closed-loop control. Existing methods for the communication use separate modules or additional power components connected with the resonant tank or load. Therefore, these methods suffer from low reliabilities, high costs, or large disturbances on power transfer. To overcome these disadvantages, this paper proposes a synchronous rectification-based phase shift keying method for WPT systems. The method is to modulate the phase difference between the rectifier input voltage and the receiver resonant current and demodulate the reflected phase difference between the inverter output voltage and the transmitter resonant current. The disturbance on power transfer caused by the modulation is numerically analyzed. Two encoding schemes, namely the binary encoding and the pulse frequency/width encoding are suggested for digital and analog data transfer, respectively. The maximum data rate, the highest pulse frequency, and the narrowest pulse width are derived based on the system dynamical characteristics. Experimental results are given to verify the method and analysis.
基于同步整流的无线电力传输系统相移键控通信
无线电力传输(WPT)系统的收发通信在闭环控制中起着重要的作用。现有的通信方法使用单独的模块或与谐振槽或负载连接的附加电源组件。因此,这些方法存在可靠性低、成本高或对电力传输干扰大的问题。为了克服这些缺点,本文提出了一种基于同步整流的WPT系统相移键控方法。该方法是调制整流器输入电压与接收机谐振电流之间的相位差,解调逆变器输出电压与发射机谐振电流之间的反射相位差。数值分析了调制对功率传输的干扰。提出了两种编码方案,分别用于数字和模拟数据传输,即二进制编码和脉冲频率/宽度编码。根据系统的动态特性,导出了最大数据速率、最高脉冲频率和最窄脉冲宽度。实验结果验证了方法和分析的正确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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