研究生: |
邱奕勳 Yi-Hsun Chiu |
---|---|
論文名稱: |
電池充電用數位控制LLC諧振轉換器設計與研製 Design and Implementation of a Digitally-Controlled LLC Resonant Converter for Battery Charging Applications |
指導教授: |
劉益華
Yi-Hua Liu |
口試委員: |
羅有綱
Yu-Kang Lo 王順忠 Shun-Chung Wang 鄧人豪 Jen-Hao Teng |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 中文 |
論文頁數: | 117 |
中文關鍵詞: | 電動車 、二次電池 、LLC諧振轉換器 、零電壓切換 、五階段定電流充電 、ZigBee |
外文關鍵詞: | Electrical vehicle, secondary battery, LLC resonant converter, zero voltage switching, five-step constant current, ZigBee |
相關次數: | 點閱:472 下載:19 |
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隨著全球能源需求不斷增加,人們開始意識環境的問題,並對無排放廢氣的電動車逐漸感興趣。然而電動車的二次電池對於儲能解決方案扮演重要的角色。二次電池的性能和壽命與充電機的設計好壞息息相關。而充電機以高效率、較長的充放電循環次數、較短的充電時間為設計目標。
提出數位控制LLC諧振轉換器來實現電池充電機。LLC諧振拓撲網路的優勢在於電能轉換效率高,在主開關切換時具有零電壓切換(ZVS)的特性,進而降低關關的切換損失。接著本文利用五階段定電流(CC)充電法,提升充電的效率。五階段充電法被證明具有延長電池壽命,提高充放電效率並降低充電時間。數位化的實現本文以Microchip公司推出的dsPIC33FJ16GS502微控制器實現LLC諧振轉換器的數位變頻操作,使用數位控制器的優點為電路只需較少的周邊元件讓電路設計更彈性化。為了得到二次電池的相關參數,本文採用ZigBee無線通訊模組與數位充電機結合,使資訊透過無線方式傳到電腦的LabVIEW做顯示。
Due to the continuous growth of the global energy demand and the increasing concern about environmental issues, interests in using and developing zero emission electrical vehicle (EV) are growing. For EV, secondary batteries play a significant part in energy storage solutions. The performance and longevity of secondary batteries depend on the quality of their chargers. The design objectives of high-quality charger include high efficiency, long cycle life and short charging time.
In this thesis, a digitally-controlled LLC resonant converter is developed for battery charging applications. The LLC resonant topology allows for zero voltage switching (ZVS) of the main switches, thereby dramatically lowering switching losses and boosting efficiency. To enhance the performance of the developed battery charger, five-step constant current (CC) charging pattern is utilized in this paper. The five-step CC charging algorithm is proven to have the advantages of prolonged cycle life, enhanced charge/discharge energy efficiency, and reduced charging time. In addition, the dsPIC33FJ16GS502 from Microchip corp. is used as the digital variable frequency controller of the LLC series resonant converter. The advantages of the digital controller include components cost reduction and more design flexibility. In order to provide the data logging of the battery parameters, the presented digital charger can also communicate with an external host using ZigBee wireless communication protocols.
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