臺灣博碩士論文加值系統

本文探討切換式磁阻馬達(Switched Reluctance Motor)之開關角度對於轉矩漣波的影響，進而發展出一套開關角度控制。通常使用直接轉矩控制做為驅動策略時，當磁阻馬達操作於高速運轉時會因為轉矩補償及電流續流問題而產生較大的轉矩漣波。藉由開關的導通與截止角度控制，進而抑制高轉速時馬達之轉矩漣波。本方法使用MATLAB軟體進行模擬，分析馬達運轉不同轉速時轉矩漣波抑制情況。接著以一具額定2.2kW之切換式磁阻馬達以及非對稱半橋驅動器驗證本文提出的開關角度控制，在各轉速下皆有效抑制轉矩漣波在20%以內。

This thesis illustrates the impact of current conduction angle on torque ripple for the operation of switched reluctance motor. A control methodology is then proposed to alle-viate this impact. In general, torque ripple is more obvious as the switched reluctance motor is running at high speed using the Direct Torque Control because of unbalanced torque compensation and current tail effect. The proposed method is to adaptively control the turn-on and turn-off angles of the power switch in order to improve the torque bal-ancing compensation as well as reduce the current tail effect. MATLAB simulation is ap-plied to analyze the proposed effect on torque ripple reduction at different rotor speeds. Following that, a 2.2kW switched reluctance motor driven by an asymmetric half bridge converter is tested to validate the effectiveness of the proposed control methodology. Test result shows that the torque ripple can be suppressed below the range of twenty per-cent at different rotor speeds.

摘要 I
Summary III
目錄 XII
表目錄 XV
圖目錄 XVI
第一章 緒論 1
1.1 研究背景 1
1.2 文獻回顧 3
1.3 研究動機 7
1.4 論文章節概要 8
第二章 切換式磁阻馬達之介紹 9
2.1 切換式磁阻馬達之構造與特性 9
2.1.1 磁阻力介紹 11
2.1.2 磁阻馬達運作方式 12
2.2 切換式磁阻馬達之數學模型 14
2.2.1 電氣方程式 14
2.2.2 機械方程式 16
2.2.3 機電耦合方程式 17
2.3 切換式磁阻馬達之電感與轉矩特性 22
第三章 切換式磁阻馬達之驅動策略 25
3.1 驅動電路 25
3.1.1 非對稱半橋式功率轉換器 25
3.1.2 功率轉換器之工作模式 27
3.2 轉矩分配策略 30
3.3 直接轉矩控制 33
3.4 直接即時轉矩控制 39
3.5 模糊邏輯導入直接轉矩控制 41
3.5.1 定頻控制導入直接轉矩控制 41
3.5.2 模糊邏輯導入直接轉矩控制 43
第四章 開關角度控制與轉速控制 49
4.1 前言 49
4.2 影響轉矩漣波的因素 49
4.2.1 繞組電流控制 49
4.2.2 導通角度控制 51
4.3 開關角度控制 53
4.3.1 截止角度 55
4.3.2 啟始角度 58
4.3.3 開關角度控制之應用 61
4.4 轉速控制 70
4.4.1 內迴圈與外迴圈控制 70
4.4.2 轉速控制之應用 71
第五章 硬體與軟體規劃及實測結果 73
5.1 前言 73
5.2 硬體設備 73
5.2.1 切換式磁阻電機 74
5.2.2 驅動器 75
5.2.3 微處理器之介紹 78
5.2.4 增量型編碼器 80
5.3 微控制器之軟體規劃 81
5.4 實測結果與結果比較分析 86
第六章 結論與未來展望 94
6.1 結論 94
6.2 未來展望 95
參考文獻 96

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