A Simultaneous Wireless Power and High-Rate Data Transfer System Based on Transient Responses Regulation

Abstract

In this letter, a simultaneous wireless power and data transfer (SWPDT) method for wireless power transfer systems is proposed. Data and power are transferred via the same coupler. To achieve a high transfer power and a high data transfer rate, double-side LCC compensation topology with band-pass filtering is adopted to create a favorable condition for data transfer. An inductor fully compensated at the power carrier frequency and connected serially with the coupled coil is used to inject and extract the data carrier and multiplexed to conduct the power carrier. In addition, the duration time of the transient responses of the data transfer channel is regulated based on complex frequency-domain analysis. Finally, a 1.1 kW SWPDT experiment prototype with a data transfer rate of 1 Mbps and a data transfer delay of 0.4 μs is built to verify the feasibility of the proposed method.