Research on simultaneous wireless power and data transfer method based on partial power coupling coil
Aiming at the need of full-duplex communication between power transmitting side and receiving side of the wireless power transfer system,a simultaneous wireless power and data transfer method based on partial power coupling coil was proposed. In this method,the inner and outer part coils of power cou-pling coil were used as data forward and reverse transfer coupling mechanism respectively,and the LC parallel circuit in data receiving circuit was used to suppress same-side data carrier crosstalk. By con-structing a system model,the characteristics of power transfer and data transfer as well as system transfer interference were analyzed,and the influence law of system parameters on transmission characteristics was obtained. In order to improve the data transfer gain and reduce the crosstalk between forward and reverse data transfer,the layout of the coupling mechanism was optimized. Finally,the simultaneous wireless power and full-duplex data transfer platform with transfer power of 20 W was built,the experimental re-sults show that the data full-duplex simultaneous transfer of 200 kbps forward data rate and 400 kbps re-verse data rate is achieved while the power transfer is not affected. These results verify the reliability and effectiveness of the proposed method.
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