隨著全球替代能源議題,電動車開始行走於一般道路面,本論文將無線充電技術運用於電動車充電,初始鎖定運用對象為老人代步車。 本論文建立之無線充電系統,前級能量傳輸電路,利用電感耦合式E類功率放大器來達到無線傳電的功能,為了使無線充電系統效率最佳化、足夠的充電距離,最先針對此電路效率最佳化,分別設計耦合距離為7公分與14公分之電感耦合式E類功率放大器,耦合線圈直徑皆超過23公分,藉由E類功率放大器的原理、阻抗匹配、耦合線圈的分析與設計,以及電路功耗的改善,將此二個耦合距離之電路效率大幅改善至83%以上,且輸出功率超過20W,其次在二次側加入橋式整流電路,將經過整流後之電路效率再最佳化,最後,加入後級直流對直流降壓轉換電路、充電電路與鉛酸電池,建立無線充電系統,達到無線充電之功能。 最後,論文內容包含耐高壓直流對直流降壓轉換晶片之設計,運用高電壓輸入而降低電路壓降相對影響比例,以達提升系統效率之動機,設計電壓模式控制架構之直流對直流降壓轉換晶片,此晶片使用TSMC 0.25 CMOS製程製作。
With the global alternative energy issues, electric cars began to walk on general road surface, the thesis used in the wireless charging technology for electric vehicle charging, the initial use of the object lock for the elderly scooter. In this thesis, establishment of the wireless charging system, the primary power transfer stage transfers power in wireless by Inductive Coupling Class E Power Amplifier. In order to optimize efficiency of wireless charging system and obtain enough charging distance, the inductive coupling class E power amplifier will be optimized efficiency first. Two coupling distance specific of the inductive coupling class E power amplifier are 7cm and 14 cm to be designed. The coupling coils are more than 23cm in diameter. Efficiency of the two coupling distance specific of the inductive coupling class E power amplifier were improved to more than 83%, and output power is more than 20W by realized class E power amplifier principle, impedance matching, coupling coil analysis and design. Second, bridge rectifier was joined in the secondary side. The efficiency was optimized after joining bridge rectifier. Finally, the system joins DC-DC buck converter, charger and lead acid battery to become a wireless charging system to achieve wireless charging function. Finally, in this thesis, it contains a high voltage DC-DC buck converter chip design, the design motivation is reducing the impact ratio of voltage drop relative to input voltage to improve system efficiency, the architecture of the DC-DC buck converter chip is voltage-mode control, the high voltage DC-DC buck converter are fabricated by TSMC 0.25 um CMOS technology.