A Feedback Circuit of Effective Wireless Power Transfer for Low Power System
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Wireless power transfer (WPT) is the technology that forces the power to transmit electromagnetic field to an electrical load through an air gap without interconnecting wires. This technology is widely used for the applications from low power smartphone to high power electric railroad. In this paper, the model of wireless power transfer circuit for the low power system is designed for a resonant frequency of 13.45 MHz. Also, a feedback WPT circuit to improve the power transfer efficiency is proposed and shown better performance than the original open WPT circuit, and the methodology for power efficiency improvement is studied as the coupling coefficient increases above 0.01, at which the split frequency is made.
Abstract
Wireless power transfer (WPT) is the technology that forces the power to transmit electromagnetic field to an electrical load through an air gap without interconnecting wires. This technology is widely used for the applications from low power smartphone to high power electric railroad. In this paper, the model of wireless power transfer circuit for the low power system is designed for a resonant frequency of 13.45 MHz. Also, a feedback WPT circuit to improve the power transfer efficiency is proposed and shown better performance than the original open WPT circuit, and the methodology for power efficiency improvement is studied as the coupling coefficient increases above 0.01, at which the split frequency is made.
참고문헌 (4)
- [URL]
- 서동욱, "Study on Two-Coil and Four-Coil Wireless Power Transfer Systems Using Z-Parameter Approach", ETRI Journal, 38(3), pp.568~578 (2016), 한국전자통신연구원[DOI]
- Junfeng Chen, "Metamaterial-Based High-Efficiency Wireless Power Transfer System at 13.56 MHz for Low Power Applications", Progress In Electromagnetics Research B, 72, pp.17~30 (2017)[DOI]
- Hoang Minh Huy, "Efficiency Improvement of Wireless Power Transfer by using of Adaptive Circuit", Journal of The Institute of Electronics Engineers of Korea, 38(10) (2011)