研究生: |
陳信佑 Hsin-Yu Chen |
---|---|
論文名稱: |
高效率2kW電動車磷酸鋰鐵電池充電器之研製 Study and Implementation of a High-Efficiency 2-kW LiFePO4 Battery Charger for Electric Vehicle Applications |
指導教授: |
羅有綱
Yu-Kang Lo 邱煌仁 Huang-Jen Chiu |
口試委員: |
王見銘
Chien-ming Wang 劉益華 Yi-hua Liu |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 中文 |
論文頁數: | 126 |
中文關鍵詞: | 無橋式功率因數修正器 、全橋串聯諧振轉換器 、二階段定電流/定電壓充電 |
外文關鍵詞: | Bridgeless PFC, FB-LLC Series Resonant Converter |
相關次數: | 點閱:798 下載:17 |
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本論文目的在研究和設計適合電動汽車所使用的高效率磷酸鋰鐵電池充電器。電路前級採用雙開關無橋式功率因數修正器,實現了高功率因數和低輸入電流諧波,並利用無橋技術提高轉換效率。後級採用全橋串聯諧振轉換器,實現零電壓切換,降低開關元件電壓應力,提高輸出效率,並具備輸出與輸入之間的電氣隔離。最後再串接一級交錯式降壓型轉換器,用來達到低漣波輸出及兩階段定電流/定電壓的電池充電模式,實現了對磷酸鋰鐵電池組的充電規格要求。最後並對實際設計的2kW電池充電器進行量測與分析,實驗結果證實,在輸入220V的情況下,三級串接的整機,滿載效率可達92%。
This thesis presents the study and design of a LiFePO4 battery charger for electrical vehicle applications. The front stage is a bridgeless power factor correction (PFC) circuit to achieve high power factor and low input current harmonics. Due to the bridgeless topology, the conversion efficiency is improved. The post stage is full-bridge series resonant converter (FB-SRC) with zero-voltage switching (ZVS). It can reduce the voltage stresses on the power switches, raise the efficiency and achieve electrical isolation between input and output. An interleaved buck converter is used to achieve low output ripple and accomplish constant current/constant voltage battery charging scheme. Finally a 2-kW battery charger is implementd and tested. The experimental results are shown to verify the feasibility of the proposed charger system. A 92% effcieny is achieved by the studied three-stage circuit under 220V input voltage condition.
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