Study of a Smart Contactless Charging Platform with Coil Array

• Main Authors: Ching-Yang Hsu, 徐京暘
• Other Authors: Jwo-Shiun Sun
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/wz35xv

碩士 === 國立臺北科技大學 === 電子工程系研究所 === 103 === This thesis proposes a contactless charging platform that allows portable devices or other mobile devices being placed and charged. Using wound-wire structure and electromagnetic induction, contactless power transmission can be achieved between platform and electronic devices. The charging platform adopts a microcontroller to select the appropriate array coils to be actived. The proposed array structure not only retains the original sensing area but also detects the secondary-side coil position to drive the primary-side coil and charge the load. Comparing to the previous version of contactless charging systems, the transmission efficiency increased by 6%. Therefore, it can improve the power consumption and achieve smart charging.The experimental results show that the secondary-side output voltage is 4.96V when the induction coil displacement is smaller than 2mm. The corresponding maximum output power and the maximum transmission efficiency are determined to be 3.43W and 64% respectively.