DESIGN OF A WIRELESS CHARGING SYSTEM COMPOSITED OF ANTENNA AND CIRCUITS IN HF BAND

• Main Authors: Yu-Wei Weng, 翁漁渭
• Other Authors: Chi-Fang Huang
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/61678263243344233277

碩士 === 大同大學 === 電機工程學系(所) === 100 === The framework of wireless charging in this thesis is to use HF band (13.56MHz) as its resonance frequency to produce loop antenna in transmission and receiving side. By using a signal generator and a power amplifier to transmit the power energy from transmission side and receiving the power energy by the loop antenna of receiver side which is about 10mm distance from transmission side, the receiver side would receive the power energy through the bridge-rectifier circuit and put it through charging circuit to charge mobile or Li-ion battery. This thesis would discuss how to impedance complex conjugate and introduce design methods of rectifying and charging circuit. In practice, we will apply our charging device to charge Li-ion battery to verify if the design correct. To ensure the receiver object (such as mobile phone) on the transmission platform to receiver the energy from each point of transmission platform uniformly, we design a coil array. Finally, we use CST software to simulate the magnetic field and measure the voltage data from our charging board to verify if the result of experiment can match our expectation for the original design.