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研究生：	丁昊宇 Ting, Hao-Yu
論文名稱：	基於切換式磁阻馬達轉矩漣波抑制之轉矩控制器設計 Torque Controller Design for Switched Reluctance Motor Based on Torque Ripple Reduction
指導教授：	張簡樂仁 Chang-Chien, Le-Ren
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電機工程學系 Department of Electrical Engineering
論文出版年：	2017
畢業學年度：	105
語文別：	英文
論文頁數：	130
中文關鍵詞：	切換式磁阻馬達、轉矩漣波抑制、直接轉矩控制、直接即時轉矩控制
外文關鍵詞：	Switched reluctance motor, Toruqe ripple reduction, Direct torque control(DTC), Direct instantaneous torque control(DITC)
相關次數：	點閱：95 下載：5
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本文旨在探討切換式磁阻馬達轉矩漣波的改善，首先針對介紹其生成原因，接著列舉常見的轉矩漣波抑制方法，其中包含機構設計、轉矩分配策略(Torque sharing function) 、直接轉矩控制(Direct torque control) 以及直接即時轉矩控制(Direct instantaneous torque control)。基於直接轉矩控制原理，本文提出一個改良方法，除了能夠抑制轉矩漣波之外亦能夠減少單相負轉矩的產生。同時，透過採用定頻調變器來調整其最大責任周期以及調整兩相交疊角度，能夠精進驅動器轉換效率以及轉矩漣波抑制效果。最後以一具額定3kW 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方法對抑制轉矩漣波之有效性。

This thesis aims to reduce torque ripple on the operation of a switched reluctance motor (SRM). At first, the cause of torque ripple is introduced. Following that, a series of torque ripple reduction methods are surveyed including motor physical design, torque sharing function (TSF), direct torque control (DTC) and direct instantaneous torque control (DITC). Based on the direct torque control, this thesis proposes a refined direct torque control (refined DTC) which not only enhances torque ripple reduction ability, but also decreases the excitation of single phase negative torque which could improve the motor drive efficiency. Using the refined DTC, this thesis addresses further improvement of the torque ripple reduction by constant frequency modulation, maximum duty ratio tuning on the constant frequency modulator, and the commutation angle tuning. In the end, a 3kW SRM and an asymmetric half bridge converter are tested to validate the effectiveness of the proposed driving methodology.

摘要 .................................................. I
Abstract ............................................. II
誌謝 ................................................ III
Contents ............................................. IV
List of tables ...................................... VII
List of Figures .................................... VIII
Chapter 1 Introduction ................................ 1
1 Background ........................................ 1
2 Motivation ........................................ 2
3 Thesis Organization ............................... 2
Chapter 2 Fundamentals of Switched Reluctance Motor ... 4
1 Classification of Reluctance Motors ............... 4
2 Basic principles of Switched Reluctance Motor ..... 7
3 Configuration of Switched Reluctance Motor ....... 10
3.1 Decision of Phase Numbers ...................... 10
3.2 Decision of Pole Numbers ....................... 13
4 Mathematical description of the Switched Reluctance Motor ................................................ 14
4.1 Magnetization Curve ............................ 14
4.2 Energy Conversion Loop ......................... 17
4.3 Equivalent Circuit of Switched Reluctance Motor ...................................................... 23
5 Features of Switched Reluctance Motor ............ 27
Chapter 3 Control of Switched Reluctance Motor ...................................................... 30
1 Converter topology and Operation ................. 30
2 Dynamic Operation ................................ 37
3 Influence Factors of Torque Ripple................ 44
3.1 Winding Inductance Saturation .................. 44
3.2 Turn-on, Turn-off and Commutation Angles ....... 45
3.3 Current Controller ............................. 49
3.4 Motor Characteristic............................ 51
4 Torque Ripple Minimization Approaches ............ 53
4.1 Physical Configuration ......................... 54
4.2 Torque Sharing Function (TSF) .................. 56
4.3 Direct Torque Control (DTC) .................... 59
4.4 Direct Instantaneous Torque Control (DITC) ..... 66
Chapter 4 Refined Direct Torque Control on Switched Reluctance Motor ..................................... 71
1 Voltage Space Vector of Switched Reluctance Motors ...................................................... 71
2 Vector Switching Rule ............................ 75
2.1 Conventional Direct Torque Control ............. 75
2.2 Refined Direct Torque Control................... 80
3 Refined Direct Torque Control with Constant Frequency Modulator ............................................ 83
3.1 Constant Frequency Modulator ................... 83
3.2 Variation with Different Maximum Duty Ratio .... 88
3.3 Variation with Different Commutation Angles .... 89
Chapter 5 Simulation Environment and Experimental Results ...................................................... 94
1 Simulation Environment ........................... 94
2 Experiment Setup ................................. 95
2.1 Experiment Platform-Torque meter ............... 96
2.2 Experiment Platform-Motor ...................... 98
2.3 Experiment Platform-Driver .................... 100
2.4 Program Planning .............................. 106
3 Experiment Results .............................. 110
Chapter 6 Conclusions and Future Works .............. 125
1 Conclusions ..................................... 125
2 Future Works .................................... 126
Reference ........................................... 127
                                    

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