Implementation of contactless inductive charging cup

• Main Authors: Jia-Wei Chen, 陳嘉緯
• Other Authors: Jia-You Lee
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/95558229149072588133

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 96 === This thesis presents the design of contactless inductive charging cup for low power portable electric appliances, such as bluetooth, hearing aid, pen recorder or MP3. First, the fundamental principle and application fields of contactless power transmission are discussed, and the circuit topology and the coupling structure which this system adopts are proposed. As for circuit design, since the contactless power transmit ability is restricted by loosely coupled power transformer, thus the design of the resonant circuit can improve the characteristic of impedance and the system performance. When it comes to control circuit, while variation of the placement of charged objects will cause difference in the parameter of resonant circuit; hence, microchip is utilized to implement selective excitation circuit and variable frequency control. Finally, a 200mA Li-Polymer battery is applied as load to actualize the designed system, and the experimental results and data are provided.