臺灣博碩士論文加值系統

本論文旨在研製新型四主開關三相變頻器，主要貢獻在於新型三相變頻器之架構，僅使用四個主功率開關以及四個輔助開關，即可達到三相電壓輸出，所有主功率開關均可零電壓切換，所有輔助開關均可零電流切換。由於減少一臂的主功率開關使得控制電路與輔助電路均減少一組，因此所提出之架構具有成本低、體積小及效率高等優點。最後，利用電腦模擬並實體製作輸出功率200W及開關切換頻率40kHz之硬體雛形，以驗證本論文之可行性。
關鍵詞：零電壓切換(ZVS)、零電流切換(ZCS)、四主開關三相變頻器(FSTPI)

A novel four-switch three-phase inverter is designed and implemented. A low cost four main switches and four auxiliary switches power converter configuration of the three-phase inverter is proposed. All main switches in the three-phase inverter operate at zero voltage switching (ZVS) turn on and turn off. Also, the auxiliary switches operate at zero current switching (ZCS) turn on and turn off. Moreover, the reduction in the number of main switches can also increase the reliability, since the control circuits and the auxiliary circuits are there by reduced to two sets.
Therefore, the proposed power converter configuration achieves the low cost and high efficiency inverter without changing devices rate. The principle of operation, computer simulation and experimental results of the four-switch three-phase inverter, rated 200W and operated at 40kHz are provided to demonstrate the performance.

Keywords: Zero-Voltage Switching (ZVS), Zero-Current Switching (ZCS), Four-Switch Three-Phase Inverter (FSTPI)

摘 要I
英文摘要II
誌 謝III
圖 目 錄IV
表 目 錄IX
目 錄X
第一章 緒論1
1.1 研究背景1
1.2 回顧現有三相柔切變頻器4
1.2.1 直流電壓端零電壓切換變頻器4
1.2.1.1 諧振直流鏈變頻器5
1.2.1.2 直流電壓端諧振技術應用之缺陷6
1.2.2 交流負載側零電壓切換變頻器6
1.2.2.1 輔助諧振換流極變頻器7
1.2.2.2 具耦合電感之零電壓轉移變頻器8
1.2.2.3 交流負載側諧振技術之缺陷9
1.3 研究動機9
1.3.1 交流負載側零電壓切換變頻器改善方案一10
1.3.2 交流負載側零電壓切換變頻器改善方案二10
1.3.3 交流負載側零電壓切換變頻器改善方案三11
1.4 本論文之主要貢獻12
1.5 章節概述13
第二章 輔助諧振換流極變頻器之原理分析14
2.1 簡介14
2.2 硬性切換之橋式電路分析15
2.3 輔助諧振換流極變頻器原理19
第三章 四主開關三相變頻器27
3.1 簡介27
3.2 系統架構與操作原理27
3.2.1 主功率開關控制及工作模式分析29
3.3 三相輸出電壓之諧波分析與分壓電容設計40
第四章 電路實現與元件設計42
4.1 簡介42
4.2 功率電路元件設計43
4.2.1 功率轉換電路44
4.2.2 輔助諧振電路45
4.3 控制電路參數設計48
第五章 模擬與實測結果57
5.1 簡介57
5.2 開關柔切特性之模擬與實測57
5.2.1 功率開關控制信號模擬與實測59
5.2.2 主功率開關零電壓切換之模擬與實測60
5.2.3 輔助開關零電流切換之模擬與實測72
5.3三相輸出電壓波形量測80
5.3.1 穩態特性量測80
5.3.2 暫態特性量測86
第六章 結論與未來展望88
6.1 結論88
6.2 未來展望88

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