研究生: |
李政諺 Cheng-Yen Lee |
---|---|
論文名稱: |
高效能雙向三相直流-直流轉換器研製 Study and Implementation of a High Performance Bidirectional Three-Phase DC-DC Converter |
指導教授: |
邱煌仁
Huang-Jen Chiu 謝耀慶 Yao-Ching Hsieh |
口試委員: |
張永農
Yong-Nong Chang 劉宇晨 Yu-Chen 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: | 2016 |
畢業學年度: | 104 |
語文別: | 中文 |
論文頁數: | 74 |
中文關鍵詞: | 雙向 、三相直流-直流轉換器 、微電網 、Y-Y接法 |
外文關鍵詞: | bidirectional, three-phase DC-DC converter, Micro-grid, Y-Y connection |
相關次數: | 點閱:482 下載:2 |
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本論文主旨在研製一台高效能雙向三相直流-直流轉換器,應用於直流微電網中做電氣隔離。電路架構為輸入側三臂半橋(六個開關)、三組諧振槽、三個隔離變壓器與輸出側三臂半橋開關所組成。三個變壓器以Y-Y接法的三相變壓器方式連結,相較於一般全橋轉換器,三個變壓器平均分擔總輸出功率,如此能夠減小鐵芯體積;開關控制部分採用每一臂控制信號相位相差120°,輸入側的開關皆達到零電壓切換。
本文首先介紹半橋串聯諧振轉換器,接著探討雙向三相直流-直流轉換器,分析其各個階段的動作原理與推導諧振槽之轉移函數,並利用數學軟體Mathcad繪製出增益曲線。最後實作出一台輸出功率8 kW的實體電路,在不同負載下整體轉換效率在95%以上。
The thesis presents the study and implementation of a high performance bidirectional three-phase DC-DC converter, which can isolate for DC micro-grid systems. The power circuit consists of three half-bridge switch legs (six switches) at input port, three resonant tanks, three isolated transformers and three half-bridge switch legs at output port. The three isolated transformers are configured in Y-Y connection. Compared with general single-transformer full-bridge configuration, it can share output power by three transformers, the size and cost of each transformer are thus reduced. The control signal has a phase-shift of 120° between each leg, the zero-voltage-switching can be achieved at input port.
First this thesis introduce half-bridge series resonant converter, and study the three phase Y-Y bidirectional resonant converter, The operation principles are analyzed and transfer function of the resonant tank is concluded. Then, a mathematical software Mathcad is used to plot the curve of voltage gain. Finally, a laboratory prototype with 8 kW rated power has been built and tested, the measured efficiencies are above 95% at different load conditions.
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