The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
针对在无线电能传输系统中实现原、副边之间信息通讯的问题，提出一种基于电能传输通道的副边斩控无线电能与信息同时传输新结构及其控制方法，其结构简单，副边仅有一个全控器件。通过理论分析得到副边全控器件导通角与负载电压的关系，副边通过反馈控制调节全控器件导通角实现负载电压恒定输出；通过改变电能传输频率和副边全控器件开关频率进行信号调制，分别实现信息的正向和反向传输。搭建实验平台验证了所提出的副边斩控无线电能与信息同时传输方式，实现负载电压50 V恒定输出，同时5 kbit/s的速率双向传输信息。
To realize the information communication between the primary and secondary sides in a wireless power transfer system, a novel structure and its control method by using the power transfer channel for bidirectional information transmission with secondary side chopper control are put forward. The sturcture is simple, in which the secondary side has only one fully-controlled switch. The relation between the secondary-side fully-controlled device's conduction angle and load voltage is deduced theoretically, and the secondary side adjusts the conduction angle through feedback control to achieve constant load voltage output. The signal is modulated by changing the power transfer frequency and the switching frequency of the secondary-side fully-controlled device, thus realizing the information forward and backward transmission, respectively. An experimental platform was built, and results verified the proposed simultaneous wireless information and power transfer (SWIPT) system with controlled chopper circuit receiver, achieving a constant output of 50 V load voltage and bidirectional transmission of information at a rate of 5 kbit/s.