Implementation of Portable Contactless Charger

• Main Authors: Shih-Hung Yeh, 葉士弘
• Other Authors: Shih-Hsiung Tu
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/16208909953706437349

碩士 === 中原大學 === 電機工程研究所 === 101 === This thesis is to develop portable inductive coupled charging device, which uses a self-oscillating resonant converter with suitable MCU and low profile magnetic components. The transmission efficiency is up to 70% when the device charges to the battery with 5V / 1A condition and the gap is 2mm between transmitter and receiver. First, we built-in Li-Polymer batteries and its charge-management controller on the transmitter to provide the operating voltage of boost converter IC and MCU. Second, we use a boost converter to apply voltage on the transformer primary winding, and feedback the primary side current to regulate the output of boost converter. Third, a MCU is used to control the charge process and execute protection function. Fourth, we use rectifier and regulator circuit as the receiver. After integrating mentioned parts, finally, we get the portable contactless charger. The contributions of this thesis are as below: (1) Light-weight: Combining contactless charger and power bank makes it become a portable device. It can be put into a pocket. (2) Primary-side current feedback: The complexity algorithms of software are unnecessarily. (3) Competitive cost: This could be a commercialized portable contactless charger.