Affiliation:
1. Key Laboratory of High Density Electromagnetic Power and Systems (Chinese Academy of Sciences) Institute of Electrical Engineering, Chinese Academy of Sciences Beijing China
2. University of Chinese Academy of Sciences Beijing China
3. State Grid Jiangsu Electric Power Co. Ltd. Nanjing China
4. Beijing Institute of Technology Beijing China
Abstract
AbstractThis paper investigates the channel and misalignment characteristics of a simultaneous wireless power and data transfer (SWPDT) system. Cross talk from the power channel to the data channel in case of misalignment can reduce the reliability of the communication system. To address this problem, this paper proposed to use the moving average filter in the field‐programmable gate array (FPGA) to obtain the optimal threshold and recover the baseband data adaptively. First, considering the parasitic capacitance of high‐frequency data coil, this paper presents a design method for DDQ coil applied in SWPDT systems. Then, the characteristics of the power channel and data channel are analyzed. In addition, the properties of the system are investigated in case of misalignment and the principle of the demodulation in FPGA is presented. Finally, a 1.5 kW prototype proved the correctness of the theoretical analysis in this paper, which can achieve a 500 kb/s communication rate. Meanwhile, the experimental results show that the SWPDT system proposed in this paper can provide reliable communication within 15% of misalignment in both the x‐ and y‐directions.