The Research Of Simultaneous Wireless Information And Power Transfer Based On Coupled Magnetic Resonances

Simultaneously transferring power and information has always been our dream. Nowadays, with the continuous development of science and technology, especially the in-depth study of the wireless power transfer during these years, we have been more capable to make it possible. The magnetic resonance wireless power transfer is a newly developed technique which has excellent power efficiency, good anti-interference and is safe to human body. Hence, if applied to the simultaneous wireless information and power transfer(SWIPT), it’ll have the potential to inherit their advantages, transferring power and information simultaneously and efficiently.In this paper, we firstly theoretically explain the basic mechanism of wirelessly transferring power and information, building a system model of the two-coiled magnetic resonance wireless information and power transfer from the perspective of the circuit theory and then analyzing the relationship between transmission distance and transmission efficiency when the two coils are strongly coupled. Secondly, according to our own research, we propose an entire system design project. After analyzing two-port network transmission property of the system using the coils’ parameters, we describe the system flow and come up with an improved frequency estimation algorithm based on the microprocessor to reduce the computational errors.Thirdly, we design a set of software and hardware experiment platform for the wireless power and information transfer system, describing its sending and receiving flow in detail. Then we represent the main models, explaining and examining their observed output wave forms.Finally, we conduct a series of specific experiment based on the former platform, taking a contrast of the different communication performance in different mediums. In the end, we come to the conclusion that the results basically conform to the theoretical design.