臺灣博碩士論文加值系統

本論文旨在利用Matlab-Simulink軟體來模擬建立一個高功率無量測器變頻器控制系統架構，並在控制架構中加入效能控制的考量，以求減少功率的損失，達到省能源的目的。本文首先說明如何建立在控制架構中的硬體模組如馬達、變頻器、PWM產生器。對於變頻器的部份我們所採用的是不同於傳統3階變頻器，對於這種變頻器的基本特性我們有更進一步的探討。
對於所採用的3階變頻器架構，我們對於它的電容電壓平衡的問題加以控制，並以提升效率減少切換損失為考量，提出一種向量空間調變的方法加以改進其性能，並以模擬的結果加以驗證。
最後討論所提出的3種效能控制的方法，馬達功率因數、估算馬達功率損失、馬達電流最小化的方法。模擬測試所提出的方法是否可行，將其效能控制的結果加以討論及分析。

The purpose of the thesis is to develop a high performance sensorless inverter for high power applications with the help of computer simulation and the Matlab-simulink software. Efficiency control is important in high power drive system to reduce power loss. The thesis describes the hardware module building of the control system, such as motor, 3-level inverter, PWM function generator. The further discussion on the attribute of the 3-level inverter is also included.
It is explained how to develop a space vector PWM method for 3-level inverter considering the neutral voltage balancing problem of DC-link capacitor and the technology for reducing the switching loss.
We propose the efficiency control by using three different kinds of optimum flux methods, i.e. power factor method, model based minimum power loss method and minimum motor current method, respectively. Finally, the computer simulations verify the feasibility of the proposed methods, and the test results as a reference for further practices is also dicussed.

第一章 緒論 1
1.1研究動機 1
1.2研究背景與目的 2
1.3內容大綱 3
第二章 系統基本架構描述 5
2.1簡介 5
2.2感應馬達數學模式 6
2.3感應馬達兩軸數學模式 8
2.4座標轉換 9
2.4.1三相座標與兩軸座標轉換 9
2.4.2二維座標間的轉換 12
2.5標么系統 13
2.6模擬測試感應機馬達程式 14
2.7變頻器 18
2.8波寬調變(PWM)產生器 22
2.9模擬變頻器程式測試 23
第三章 3 layer inverter PWM驅動與效率 27
3.1簡介 27
3.2電壓空間向量調變法 27
3.3電容平衡考量 32
3.4效率改善策略 34
3.5正弦波寬PWM驅動測試 40
3.6向量空間調變驅動測試 43
第四章 馬達效率與效能控制 46
4.1簡介 46
4.2馬達效率 47
4.2.1定子銅損 47
4.2.2轉子銅損 48
4.2.3鐵損 48
4.2.4機械損失 49
4.3無量測器之向量控制 50
4.3.1定子磁場導向磁通估測器 50
4.3.2無量測器向量控制的實現 52
4.4效能控制 54
4.4.1馬達功率角控制法 55
4.4.2 model based控制法 56
4.4.3馬達電流最小化控制法 59
第五章 模擬測試結果與分析 61
5.1效能控制驅動程式參數 61
5.2控制達成時間測試 62
5.3負載干擾測試 72
5.4變動負載測試 82
第六章 結論與建議 94
6.1結論 94
6.2建議 94
參考文獻 96
附錄 100
作者簡介 101

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