臺灣博碩士論文加值系統

本文為高功率永磁同步電動機之效率改善分析及實測。文中採用電樞電流最佳化控制，藉由推導得到直軸電流與電氣損失之關係，控制直軸電流使電氣損失最少，俾系統運轉於最佳效率點，並加入最小輸入功率補償策略，以功率追蹤的方式消除電動機之參數變動影響，達到效率最佳化控制目的。同時，利用軟體補償技巧以減少交、直軸電流振盪量，使得輸出功率更加平穩，增加系統穩定度。
本系統電路以數位信號處理器(DSP TMS320F240)為控制核心，經由數位控制軟體程式之發展，完成了實體製作。本文採200馬力(150kW )之交流永磁同步電動機作測試，在零直軸電流之控制策略下，負載為37kW運轉時，電動機運轉效率約為91.39%，而在相同條件下，利用電樞電流最佳化控制策略，則電動機運轉效率提高至92.49% ，效率改善約1.1%。
關鍵詞：效率改善、電樞電流最佳化控制、最小輸入功率補償

This thesis is concerned with efficiency improvement of permanent-magnet synchronous motors. The optimal armature current vector is proposed to reduce copper and iron losses. In order to decrease q-d axis current ripple, a compensator is designed to correct controller parameters. Furthermore, a minimal input power tracing technique, which is insensitive to motor parameters, is proposed to increase the stability of the system.
A digital control system for 150kW ac permanent-magnet synchronous motor is realized with digital signal processor (DSP TMS320F240). Experimental results indicate that the operation efficiency is increased from 91.39% to 92.49% for output power of 37kW by the proposed optimal armature current vector control method.
Keyword:efficiency improvement, optimal armature current vector, minimal input power tracing technique

中文摘要 i
英文摘要 ii
誌 謝 iii
目 錄 iv
符號索引 vi
圖表索引 x
第一章 緒論 1
1.1 簡介 1
1.2 系統架構 2
1.3 本文大綱 3
第二章 交流永磁同步電動機之數學模式 4
2.1 前言 4
2.2 交流永磁同步電動機之三相系統數學模式 4
2.3 交流永磁同步電動機之轉子同步旋轉座標系統數學模式 7
2.4 結語 11
第三章 交流永磁同步電動機參數量測 12
3.1 前言 12
3.2 光學編碼器絕對位置值之量測 12
3.3 轉子等效磁通鏈之量測 14
3.4 交、直軸電感之量測 14
3.5 定子電阻之量測 15
3.6 鐵損電阻之量測 16
3.7 結語 17
第四章 交流永磁同步電動機效率改善策略 18
4.1 前言 18
4.2 電樞電流最佳化控制策略 18
4.3 最小輸入功率補償策略 30
4.4 軟體補償技巧 30
4.4.1 前饋補償 30
4.4.2 脈寬調變加入導通延遲時間之補償策略 31
4.4.3 角度取樣補償 34
4.4.4 電壓取樣補償 35
4.5 結語 36
第五章 系統製作及實測 37
5.1 前言 37
5.2 實體製作 37
5.2.1 變流器及其驅動電路 39
5.2.2 電流偵測電路 39
5.2.3 軟體規劃 40
5.3 實測結果 48
5.4 結語 49
第六章 結論與建議 54
6.1 結論 54
6.2 建議 55
參考文獻 56
附錄A 交流永磁同步電動機之規格及參數 59
作者簡介 60

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