臺灣博碩士論文加值系統

本文旨在研製以數位信號處理器為基礎之雙向直流-直流功率轉換器，作為蓄電池充、放電使用。當系統於昇壓模式時，低壓側之蓄電池對高壓側之直流鏈放電；而於降壓模式時，則高壓側之直流鏈對蓄電池充電。本文將回授高、低壓側電壓及電流以完成電壓及電流閉迴路控制，其輸出電壓維持穩定而不受負載變動影響。另高頻變壓器低壓側採用雙繞組及功率轉換器並聯之結構，功率級電晶體之切換以交錯式方式控制，可分散低壓側電流以提升轉換效率。降壓模式操作時，本文採用相移式脈波寬度調變控制高壓側功率級電晶體之開關狀態，並使功率電晶體達成零電壓切換，降低切換損失。
本文以低價位之16位元數位信號處理器(DSP, TMS320LF2407A)為控制核心，其電壓及電流閉迴路控制及脈波寬度調變控制皆由軟體程式完成之。本文已完成500W之實體製作，低壓側蓄電池端電壓範圍為20~27V，直流鏈電壓額定為300V。結果顯示，於昇壓模式操作下，滿載效率為88%；而於降壓模式下，其效率為92%。

This thesis presents the design and implementation of a digital signal processor based bi-directional dc-dc power converter for battery charge and discharge. When power converters operate at boost mode, the low-voltage side battery will discharge and provide power for dc-link; while at buck mode, the high-voltage side dc-link will charge the battery. The output voltage can be steady with voltage and current feedback control. The high-frequency transformer which uses two windings in parallel with power converter, together with the use of interleave control will split input current and raise the efficiency of conversion. In buck mode, the power switches are operated by phase-shifted control with soft switching and thereby reduce switching loss.
The 16-bit digital signal processor, TMS320LF2407A, is used to implement the control function of the system. Experiments of 500W power converter are given. The terminal voltage range of battery is 20V~27V, and the dc-link voltage is 300V. The efficiency at full load of boost and buck modes are 88% and 92%, respectively.

中文摘要 Ⅰ
英文摘要 Ⅱ
誌 謝 Ⅲ
目 錄 Ⅳ
符號說明 Ⅵ
圖表索引 Ⅷ
第一章 緒論 1
1.1 動機及目的 1
1.2 文獻探討 2
1.3 系統架構及本文特色 4
1.4 本文大綱 6
第二章 雙向直流-直流功率轉換器之模式分析 7
2.1 前言 7
2.2 昇壓模式之直流-直流功率轉換器分析及控制 7
2.2.1 昇壓模式之工作原理 7
2.2.2 昇壓模式之分析與控制 10
2.3 降壓模式之直流-直流功率轉換器分析及控制 14
2.3.1 降壓模式之工作原理 14
2.3.2 降壓模式之分析與控制 19
2.4 結語 24
第三章 雙向直流-直流功率轉換器之電路參數設計 25
3.1 前言 25
3.2 磁性元件設計 25
3.2.1 磁性材料 25
3.2.2 高頻變壓器設計 26
3.2.3 電感設計 27
3.2.4 集膚效應與鄰近效應之考量 29
3.3 電容的選擇 30
3.4 功率電晶體的選擇與盲時設定 31
3.5 結語 32
第四章 實體製作與實測 33
4.1 前言 33
4.2 硬體電路 33
4.2.1 數位信號處理器介面電路 33
4.2.2 電壓回授電路 34
4.2.3 電流回授電路 36
4.2.4 功率電晶體及其閘極驅動電路 37
4.3 軟體規劃 38
4.3.1 主程式規劃 38
4.3.2 昇壓模式之控制程式 40
4.3.3 降壓模式之控制程式 41
4.4 實測結果 42
4.5 結語 53
第五章 結論與建議 54
5.1 結論 54
5.2 建議 55
參考文獻 56
附 錄 A 系統參數 59
作者簡介 60

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