本論文主要以積體電路UC3854A為控制基礎,實現昇壓式功率因數修正的電力電路控制,其採用平均電流法控制電力電路,並使操作在CCM模式下,以達成功率因數修正功能在交流/直流轉換的場合中可得到高功率因數與定電流/定電壓輸出,達到以定電流-定電壓(CC-CV)充電法對電池充電之效用。 本電路架構分為兩階段狀態,第一段為0.5安培定電流輸出與第二階段380伏特定電壓輸出,切換之條件為負載累積達到電壓值大於設定電壓值上限值時,則切換第二階段定電壓階段,並且將輸出電壓定在380伏特。本文介紹的理論和技術的實作驗證達到預期的結果,後續著重在效率的提升之加強。
In this thesis, the controller and power circuit of a boost power factor corrector (PFC) are implemented based on the UC3854 IC. The average current mode control is adopted for power factor corrector which is in the continuous conduction mode. The proposed system not only has a high input power factor, high regulated output voltage but also achieves CC-CV for charger. There are two stages in the used boost power factor corrector, including the first stage for 0.5A constant current output and the second stage for 380V constant voltage output. As the output voltage reaches the upper limit, the circuit will be switched from the first stage to the second stage. Also, it keeps the output voltage for 380V. The theoretical analysis and the presented techniques are all verified by computer simulations and experiments. Potential future works are mentioned to further improve the power level and conversion efficiency.