Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 34, Issue 3, Pages 2956-2965Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2018.2847044
Keywords
Communication rate; frequency-shift keying (FSK); series-parallel combined resonant circuit (SPRC); topology; wireless power and information simultaneous transfer (WPIT)
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Funding
- National Natural Science Foundation of China [51577041]
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In this paper, a new wireless power and information simultaneous transfer (WPIT) technology based on binary frequency shift keying (2FSK) modulation using the dual bands of a series-parallel combined resonant circuit (SPRC), SPRC-2FSK-WPIT technology, is proposed. Conventional 2FSK-WPIT technologies commonly employ single resonant band, and due to the insufficient utilization of system resonance, they have inherent disadvantages, such as low efficiency and low system quality factor. In the proposed technology, the system employs dual resonant bands of the SPRC and both of the system carriers use the resonant frequencies, and so the disadvantages of the conventional 2FSK-WPIT technology are eliminated. Optimal design of the SPRC2FSK- WPIT system is conducted. In the optimized system, the two carriers have similar power and information transfer characteristics, and so a high WPIT performance, including stable power transmission, is guaranteed. The proposed technology is validated by experimental results. The experimental prototype shows up to 20 kb/s of communication rate with maintaining the power transfer efficiency over 85% at the distance of 50 mm.
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