A modified 4-coil magnetic resonance wireless power transfer (MRWPT) system is proposed. Four coils based on 2-coil system with additional two matching coils were used in this topology. When Tx-Rx distance is changed, the input impedance is changed. However, it can be adjusted by coil parameters of matching coils to maintain impedance matching for maximum efficiency. The equivalent circuit of MRWPT system was analyzed for both transmission function and optimum coupling coefficient of the matching coils. By using four spiral resonant coils, these design considerations was experimentally verified. The measured data agreed well with the calculated data and the transmission function of the proposed system was more efficient than that of conventional 2-coil system.
목차
Abstract 1. Introduction 2. Concept of Matching Coils 3. Modified 4-Coil System 4. EXPERIMENTAL RESULT 5. CONCLUSION ACKNOWLEDGMENT REFERENCES
키워드
Wireless power transfermagnetic resonancespiral coil
저자
Gunbok Lee [ Department of Electrical Engineering, Graduate School of Engineering Mastership, Pohang University of Science and Technology, Korea ]
Corresponding Author
Wee Sang Park [ Department of Electrical Engineering, Graduate School of Engineering Mastership, Pohang University of Science and Technology, Korea ]