A multi-frequency WIPT system with a stable communication carrier

摘要

This paper proposes a new wireless information and power transfer (WIPT) system based on frequency splitting phenomenon. Three resonant frequencies appear in a four coils WPT system within certain distance under specific circuit parameters. Noticeably, the middle resonant frequency remains constant regardless of coupling coefficient change. This advantage provides a stable carrier frequency for communication to improve performance. In the proposed system, the highest and lowest resonant frequency are taken as power carriers while the middle is assigned to carry information. The simulation results show that the new system displays desirable communication stability with the OOK modulation (500kbps) and higher power efficiency (78.33%) than previous work due to overcoupling.