A High Efficient Wireless Charging System Using an Inductive Coupling Class-E Power Amplifier

• Main Authors: Chien-Chih Lu, 盧建智
• Other Authors: Hung-Wei Chiu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/xj8kcp

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 99 === The thesis uses the RFID contact-less powered theory which the power transfer to charging chip via coil coupling, and chip use it to achieve wireless charging. Finally, we build the closed-loop system to achieve circuit auto control. This thesis will discuss how to design the power source terminal''s power amplifier, charging chip, and system integration. At design power source terminal, we redesign the power amplifier that the efficiency increased from 60% to 90%. At design charging chip terminal, we use TSMC 2P4M 0.35um CMOS process to redesign the communication circuit. New communication circuit is the ASK transmitter. The ASK transmitter which use 433MHz channel as the communication channel, by separated out the communication channel and the energy transfer channel, it increase the stability of wireless charging. Finally, the wireless charging system will be built. When chip gets power from the power source terminal, it will send a voltage message to the power source terminal. Therefore, when the power source terminal gets the voltage message, it used to control DC-DC converter that by change power amplifier’s voltage to adjust charging chip. From this experiment process, we finally finish the closed-loop system.