- 學位論文
具有交錯式功率因數調控之充電器研製
Implementation of a Battery Charger with Interleaved Power Factor Correction
摘要
本文主要是嘗試以專用晶片研製較高輸出功率之電池充電器，系統採用雙級串聯連接之架構，分別為交錯式功率因數修正之交流-直流轉換器與直流-直流轉換器，使用德州儀器公司所生產UCC28070與UCC3895專用晶片做為控制核心。為提升系統功率，因此採用雙相交錯與連續導通模式之升壓型功率因數修正策略，此法具有較高之效率與低輸出漣波電流，可有效縮小儲能電感與輸出電容之體積。而直流-直流轉換器是以具電氣隔離之相移全橋架構進行設計，經由變壓器漏電感之調配使開關元件達到零電壓切換，以提升轉換器之效率。 所研製系統之規格為輸入AC 110V/60Hz、功率因數大0.95及輸出為49V/500W，最後並以實測來驗證系統之性能。
並列摘要
The aim of this thesis is to design a high power battery charger by the PWM control ICs manufactured by Texas Instruments. The charger is composed of two converters in cascade, namely the AC-DC converter with interleaved power factor correction (PFC) and isolated DC-DC converter, and these converters are realized by the PWM controller UCC28070 and UCC3895 respectively. In order to enlarge rated power, the boost-type PFC contains multiple characteristics including two-phase interleaved, average current-mode and continuous conduction mode. Such characteristic can enhance efficiency and reduce ouput current ripple, then the size of energy storage inductor and output capacitor is reduced. The isolated full-bridge DC-DC converter is implemented by phase-shifting the switching of one half-bridge with respect to the other. It achieves resonant zero-voltage switching through suitable leakage inductance of the transformer to enhance the efficiency of the converter. The specification of proposed charger is input AC110V/60Hz, power factor more than 0.95 and 49V/500W output. Finally, some experimental results are employed to verify the performance of proposed charger.