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系統識別號 U0002-1507200511212400
中文論文名稱 開關式磁阻馬達自軸承控制
英文論文名稱 Switched Reluctance Motor Self-Bearing Control
校院名稱 淡江大學
系所名稱(中) 機械與機電工程學系碩士班
系所名稱(英) Department of Mechanical and Electro-Mechanical Engineering
學年度 93
學期 2
出版年 94
研究生中文姓名 劉威廷
研究生英文姓名 Wei-Ting Liu
學號 692340705
學位類別 碩士
語文別 中文
口試日期 2005-07-08
論文頁數 84頁
口試委員 指導教授-楊勝明
委員-廖聰明
委員-龐大成
中文關鍵字 12/8SRM  徑向力控制  自軸承 
英文關鍵字 12/8SRM  Radial force control  self-bearing 
學科別分類 學科別應用科學機械工程
中文摘要 磁阻馬達經由凸極的激磁可產生一吸引力,而此吸引力可分為切線方向與徑向的力量,切線方向的力量即為轉矩,而徑向力量會因為馬達結構而互相抵銷,在這種特殊的狀態下三相12/8磁阻馬達可經由選擇不同的激磁極來同時產生徑向力與轉矩,也就是說在可以分別激磁各極電流的情形下同時控制徑向力與轉矩,使轉子在沒有軸承的情形下控制在氣隙的中央。本論文針對12/8極磁阻馬達提出一套自軸承控制系統,即轉子僅需要單邊軸承並限制軸向移動,而徑向位置則利用徑向力控制使轉子穩定於中央,本文除了分析馬達轉矩與徑向力、建立其數學模式,並提出一自軸承控制法則,最後將控制法則以DSP控制器實現並以實驗驗證之。
英文摘要 Switched reluctance motors develop torque through an attraction force between the stator poles and the rotor teeth. This attraction force can be divided into tangential and radial force components. The tangential force converts to the rotational torque, and the net radial force is generally zero due to the geometrically balanced motor structure. Due to its special structure, the shaft radial force and torque of a three-phase 12/8 switched reluctance motor can be separately controlled by proper selection of pole currents. Therefore, when all the pole currents can be controlled independently, it is possible to control the radial force to counterbalance the external force acting on the shaft. Consequently, the rotor can be controlled to a position near the center of the air gap when it does not have a rotational bearing. In this paper, a control scheme for self-bearing of a 12/8 pole SRM drive is proposed. The rotor needs only one bearing for rotation and to constrain the axial movement. The other end can move freely in radial direction but is balanced with the radial force produced by the motor. Motor torque and radial force characteristics is analyzed and modeled, the self-bearing control scheme is developed and presented. The proposed control scheme is also implemented with a DSP and verified experimentally.
論文目次 論文目錄
中文摘要
英文摘要
論文目錄………………………………………………………..………Ⅰ
圖目錄………………………………………………………………..…Ⅲ
表目錄…………………………………………………………………..Ⅵ
符號說明………………………………………………………………..Ⅶ
第一章 緒論……………………………………………………………1
1.1 背景與目的………………………………………………….…1
1.2 文獻回顧…………………………………………………….…4
1.3 論文大綱…………………………………………………….…7
第二章 開關式磁阻馬達模式…………………………………….…...8
2.1 開關式磁阻馬達簡介………………………………………….8
2.2 單極轉矩與徑向力分析…………………………….………..20
2.3 單相四極轉矩與徑向力分析……………………..………….25
2.4 整體12極之轉矩與徑向力分析……….……………………27
2.5 模擬分析……………………...………………………………29
第三章 自軸承控制……………………………………………….….36
3.1 自軸承系統應用………………………………………….…..36
3.2 產生可控制之徑向力的方法……………….………………..40
3.3 自軸承控制系統…………………………….……………..…52
第四章 實驗結果……………………………………………………..54
4.1 實驗系統…………………………………………………….. 54
4.2 實驗結果……………………………………………………...58
第五章 結論與未來工作……………………………………………..71
附錄一 12/8開關式磁阻馬達參數…………………………………..73
附錄二 實驗系統照片………………………………………………..74
參考文獻………………………………………………………………..76

圖目錄

圖1.1 SRM極對數組合對徑向力方向之影響………….………………….3
圖2.1 典型的12/8三相SRM結構圖……………………...……………….9
圖2.2 定子、轉子角度與電感之關係圖…………….……………….……11
圖2.3 產生正轉矩之電流電感關係示意圖…………..……………………11
圖2.4 典型的12/8極SRM之電感、電流與轉矩關係圖………………..13
圖2.5 基本的三相SRM驅動電路………………...……………………….15
圖2.6 基本的SRM開關切換模式……………………………….………..15
圖2.7 SRM控制方塊圖………………………….…………………………17
圖2.8 磁滯型電流控制驅動方塊圖………………..………………………17
圖2.9 磁滯型電流控制上下限…………………..…………………………17
圖2.10 PI電流控制驅動方塊圖…………………………………………...17
圖2.11 吸引力示意圖…………………….…...…………………..…………20
圖2.12 徑向力分布………………………………………………...………...21
圖2.13 12/8極SRM結構圖……….……………………………….……...21
圖2.14 A1極磁路示意圖…………………………………….….……….…21
圖2.15 比較FEA計算結果與式(2-5)計算之吸引力……………………….24
圖2.16 比較FEA計算結果與式(2-6)計算之 ……………………………24
圖2.17 各相相對角度計算流程……………...…….………………………..28
圖2.18 A2極電流為2安培時的徑向力與轉矩…………….……………..30
圖2.19 A相四極均為2安培時的徑向力與轉矩……………………….....31
圖2.20 A相四極弦波激磁之徑向力與轉矩………………………………32
圖2.21 B1=8、A2=6、C1=5 安培時之徑向力與轉矩……….………..……33
圖2.22 馬達各極極性關係圖…………………………………………...…...35
圖3.1 被動式磁浮軸承……………………………………………………..38
圖3.2 主動式磁浮軸承……………………………………………………..38
圖3.3 混合型磁浮軸承……………………………………………………..38
圖3.4 文獻[50]之自軸承SRM設計………………………………………..39
圖3.5 電感分布…………………………….………………………….……40
圖3.6 激磁電感上升相與一電感下降相之極時的磁力線迴路分布……..42
圖3.7 徑向力命令方向區間………………………………………………..42
圖3.8 為-7.5度、徑向力命令為75度時之激磁極與磁力線圖………...44
圖3.9 激磁電流計算流程…………………………………………………..44
圖3.10 徑向力大小改變、方向不變的激磁電流計算結果………………..49
圖3.11 徑向力方向改變、大小不變的激磁電流計算結果………………..49
圖3.12 不同轉角下,產生旋轉之徑向力所需的電流……………………..50
圖3.13 利用FEA和圖3.12之電流計算所得的徑向力…………………….51
圖3.14 利用圖3.12之電流以FEA分別計算各相所產生的徑向力……….51
圖3.15 自軸承系統控制方塊圖……………………………………………..53
圖3.16 自軸承控制參數計算流程圖………………………………………..53
圖4.1 硬體系統架構圖……………..………………………………………56
圖4.2 自軸承機構圖…………………………..……………………………56
圖4.3 徑向力量測系統……………………………………..………………57
圖4.4 程式流程圖…………………………………………..………………57
圖4.5 激磁A2極, 從-15°~15°所產生的徑向力………………………58
圖4.6 不同轉速下的徑向力分布…………………………….…………….59
圖4.7 不同轉速下,轉子偏心0.1mm時的徑向力……………………….60
圖4.8 為8°時,徑向力大小固定而方向以頻率4Hz旋轉下所量測的激磁電流回授………………………………………………………....61
圖4.9 固定 = 8°,徑向力命令不同時所量測之徑向力……………….62
圖4.10 不同轉角下,徑向力命令4N所量測之徑向力……………………63
圖4.11 旋轉徑向力命令為4N時,在各相相對角度為14°時激磁所量測之徑向力……………………………………………………………….64
圖4.12 轉速為400rpm時加入4Hz徑向力命令的電流回授(僅B相)……65
圖4.13 轉速為400rpm,旋轉徑向力命令為6N、4Hz所量測之徑向力…65
圖4.14 自軸承控制,轉速為0, 為8°時的轉子位置與電流…………..66
圖4.15 不同轉角下給予0.3mm步階位置響應……..……………….……..67
圖4.16 自軸承控制中加入0.3安培的轉矩電流……………..………….....70

表目錄

表3.1 方法一激磁極判斷表……………………………………...……..….42
表3.2 方法二激磁極判斷表……………………….……………………….46
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