Study on Large Air-Gap Wireless Power Transfer System with Four-coil Multi-ring Coaxial Type Inductive Coupled Structure

• Main Authors: Ching-MingLai, 賴景明
• Other Authors: Jia-You Lee
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/43988552111435065341

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 100 === This thesis is to study the four-coil multi-ring coaxial type inductive coupled structure for wireless power transfer system. Firstly, different forms of coupling structures are simulated and analyzed, so as to propose multi-ring coaxial type inductive coupled structure applied in wireless power transfer system. Furthermore, in order to improve the power transmission efficiency, the strongly coupled magnetic resonances are chosen. The system uses current sensor to detect primary inductance current, and utilizes Phase-Locked Loop (PLL) to modulate operation frequency of system maintain on primary resonant frequency, thus achieve resonant frequency tracking mechanism. Finally, experimental results show that the highest power of load is 128 watts through 1 meter air gap, and the power transmission efficiency of the system is about 22.45%