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研究生:何昆哲
研究生(外文):Kun-Che Ho
論文名稱:基於金鷹演算法之三階混合全橋LLC諧振轉換器效率最佳化
論文名稱(外文):Efficiency Optimization of Three-Level Full-Bridge Mixed LLC Resonant Converter Based on Golden Eagle Algorithm
指導教授:劉益華
指導教授(外文):Yi-Hua Liu
口試委員:鄧人豪羅有綱邱煌仁劉添華王順忠劉益華
口試委員(外文):Jen-Hao TengYu-Kang LoHuang-Jen ChiuTian-Hua LiuShun-Chung WangYi-Hua Liu
口試日期:2022-01-20
學位類別:博士
校院名稱:國立臺灣科技大學
系所名稱:電機工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2022
畢業學年度:110
語文別:中文
論文頁數:98
中文關鍵詞:電動車電池充電三階全橋LLC諧振轉換器金鷹演算法綜合效率最佳化
外文關鍵詞:Electric Vehicles (EV)Battery ChargingThree-Level Full-Bridge LLC Resonant ConverterGolden Eagle OptimizerOverall Efficiency Optimization
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現今環保意識抬頭,電動車逐漸成為趨勢,用於車用電池充電器等應用場合之功率轉換器需具備大輸出功率、寬輸出電壓以及高功率密度等特點。因此本論文實作一台三階混合全橋LLC諧振轉換器以符合上述應用需求。本論文首先提出一固定工作頻率,調節輔助開關責任週期之控制法,降低控制難度,使電路能工作於二階模式與三階模式,並根據輸出電壓與負載情況進行平滑切換,實現寬輸出電壓與高效率之目標。此外,由於目前文獻中提出之效率最佳化研究皆僅考慮單一負載情境,而轉換器應用於電池充電應用場合時,其負載會隨充電過程而持續改變,針對此一需求,本論文提出一結合LLC諧振轉換器之工作區域分析、損耗分析及金鷹演算法之效率最佳化設計方法以求解最佳諧振槽設計參數,進而實現最佳綜合效率。
本研究最後實際完成一台1250W,輸入電壓500V,輸出電壓360-500V,最大輸出電流2.5A的三階混合全橋LLC諧振轉換器,針對120串ICR-18650M之電池組規格,驗證本研究所提出的控制法與金鷹演算法求得之最佳諧振槽參數的正確性與可行性。由實驗結果可知當輸出電壓500V且輸出80%負載時,所提電路可達最高效率97.3%,且針對實際定電流-定電壓充電法各負載之時間比重進行量測可得綜合效率為95.7%。
As environmental awareness is on the rise, electric vehicles (EV) have rapidly grown in popularity nowadays. An EV charging converter requires large power, wide output voltage range and high power density. To achieve the above requirements, a three-level full-bridge LLC resonant converter is developed in this dissertation. A simple constant frequency modulation method is firstly proposed which adjusts the duty cycles of the auxiliary switches to achieve the voltage control in two-level or three-level mode, the complexity of this presented control can be greatly reduced. Besides, unlike the previous studies only consider a single load condition, this paper takes the multiple charging scenario into account and perform optimization. However, when the converter is used in battery charging application, its load will continue to change with the charging process. To address this issue, multiple load scenarios are considered during the battery charging process in this study. With the investigation on operating regions, losses analysis and golden eagle optimizer, the optimized design parameters and highest overall efficiency are obtained. A 1250W three-level full-bridge LLC resonant converter with 500V input and 360-500V/2.5A output is realized. A battery module consisting of 120 ICR-18650M batteries in series is used to validate the proposed control method and verify the feasibility and accuracy of the parameters collected from golden eagle optimizer. From the experimental results, when the load is at 80% and 500V, the proposed circuit can reach a maximum efficiency of 97.3%. The overall efficiency can be obtained by measuring the time proportion of each load in the actual constant current- constant voltage charging method as 95.7%.
目錄
摘要 I
Abstract II
誌謝 III
目錄 VII
圖目錄 X
表目錄 XIII
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 3
1.3 文獻探討 5
1.4 論文大綱 8
第二章 多階電源轉換器於電動車之應用 9
2.1 電動車充電系統架構 9
2.2 全橋串接式 10
2.3 電容中性點箝位式 11
2.4 二極體箝位式 12
2.5 三階全橋混合式 14
第三章 三階混合全橋LLC諧振轉換器架構與操作原理 15
3.1 三階混合全橋LLC諧振轉換器控制策略 15
3.2 二階模式分析 15
3.2.1 二階模式動作分析 16
3.2.2 二階模式增益探討 21
3.3 三階模式分析 23
3.3.1 三階模式動作分析 23
3.3.2 三階模式增益探討 29
第四章 金鷹演算法應用於諧振槽最佳化設計 31
4.1 全橋LLC諧振轉換器操作區域分析 31
4.1.1 全橋LLC諧振轉換器操作模式分類 31
4.1.2 參數正規化 32
4.1.3 低於諧振頻率之不連續導通模式 (電感性) 34
4.1.4 諧振頻率以上或以下的不連續導通模式 (電感性) 38
4.2 元件選用與損耗分析 39
4.2.1 功率開關選用與損耗分析 39
4.2.2 功率開關驅動器選用與損耗分析 43
4.2.3 變壓器損耗分析 46
4.2.4 輸出整流二極體損耗分析 47
4.3 效率最佳化結合金鷹演算法 48
4.3.1 金鷹演算法介紹 48
4.3.2 獵物選擇 49
4.3.3 攻擊(開發)行為 50
4.3.4 巡航(探勘)行為 50
4.3.5 更新金鷹位置 51
4.3.6 適應值與最佳化目標 52
第五章 硬體電路設計 54
5.1 定電流-定電壓充電法之負載使用情境 54
5.2 硬體電路實現說明 55
5.3 TI 28379D開發板之擴展板設計 56
5.4 Broadcom ACPL-344JT驅動板設計 58
5.5 電壓電流回授板設計 60
5.5.1 TI AMC1300B 電壓隔離放大器 60
5.5.2 LEM CKSR-15 電流感測器 61
第六章 實驗量測與結果分析 63
6.1 實驗環境與設備介紹 63
6.2 電路規格表 64
6.3 實測規劃表 65
6.4 實驗波形 66
第七章 結論與未來展望 73
7.1 結論 73
7.2 未來展望 74
參考文獻 75
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