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研究生:林琮焜
研究生(外文):Tsung-Kun Lin
論文名稱:高性能電動機之電磁特性分析與設計
論文名稱(外文):Analysis and design of electromagnetic characteristics for high performance motors
指導教授:張永華張永華引用關係黃得瑞黃得瑞引用關係
指導教授(外文):Yeong-Hwa ChangDer-Ray Huang
學位類別:博士
校院名稱:中正理工學院
系所名稱:國防科學研究所
學門:軍警國防安全學門
學類:軍事學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
論文頁數:114
中文關鍵詞:頓轉扭矩動態不平衡磁不平衡力有限元素法軸向預壓力振動充磁頭主軸馬達
外文關鍵詞:cogging torquedynamic unbalanceunbalanced magnetic forcefinite element methodaxial magnetic forcevibrationmagnetization fixturespindle motor
相關次數:
  • 被引用被引用:2
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主軸馬達為光碟機承載碟片穩定旋轉之重要組件,於傳統電機設計理念上,基於考慮轉子與定子間的磁耦合所產生之頓轉扭矩,首重對定子槽齒修弧與充磁座修弧之磁特性設計,以減低其磁耦合對動態性能之影響。但隨著光碟片容量密度與主軸馬達轉速之規格提高,屬機械結構與組裝,及激磁電流耦合之磁不平衡效應,所衍生之振動,將成為光學讀取頭之激振源,嚴重影響高轉速光碟機整體效能。
為設計高效率、低振動之高性能主軸馬達,本論文對低頓轉扭矩特性之主軸馬達,以有限元素法電磁軟體建立3D磁路模型,分別模擬與實驗計算軸向磁漏強度與軸向預壓力,探討磁漏強度所感應之霍爾元件輸出電壓與其偏壓電阻對主軸馬達效率,以及轉子與定子相對高度之軸向預壓力與軸向振動之關係。同時,利用改變主軸馬達轉子之轉軸位置、磁石高度與充磁座修弧等設計參數,提出一簡單設計法則,探討機電磁耦合之動態不平衡,提昇主軸馬達性能,有效降低光碟機激振源之振動量。依所設計伺服驅動線路與主軸馬達架構可知;霍爾元件偏壓電阻為50Ω、伺服驅動偏壓電阻為0.3Ω時,及轉子與定子之相對高度為0.2mm等機電磁特性參數之分析與設計,可使高轉速主軸馬達獲得一低頓轉扭矩、高效率、低振動之高性能主軸馬達。
The spindle motor is assigned to load a disc with steady rotation in DVD player and plays as one of important parts. According to traditional electromechanical design concept, cogging torque induced from magnetic coupled effect of rotor and stator will be designed by arcing salient poles of stator and magnetization fixture to decrease the magnetic coupled effects in spindle motor. Based on the increasing capacity density on disc and requirements on high speed spindle motors, the magnitude of vibration induced from unbalanced magnetic forces by mechanical construction and excited current will induce the significant source of exciting shock to pick-up set in spindle motor. These detrimental phenomena degrade the tracking rate and prolong the retry period of a data storage process in a DVD player.
In order to design a high performance spindle motor with high efficiency and low vibration, a 3D magnetic circuit model by electromagnetic software of finite element method (FEM) is applied to calculate the axial flux leakage and axial magnetic force of a low cogging torque spindle motor in this dissertation. The efficiency by adjustable bias resistances of output voltage of Hall element, and the axial magnetic force of unbalanced magnetic forces will be predicted and evaluated the dynamic vibration by the relative heights between rotor and stator, heights of permanent magnet, and magnetization fixtures. According to the results by the proposed model, the high performances can be obtained, where the bias resistance of Hall Element and servo driven are 50Ωand 0.3Ωrespectively, with relative height 0.2 mm between rotor and stator. This indicates that the parameters of mechanical-electromagnetic coupling effects can be applied to analyze and design by the proposed model.
封面
誌謝
摘要
ABSTRACT
目錄
表錄
圖錄
符號與縮寫
1. 緒論
1.1. 研究動機
1.2. 設計理念與文獻回顧
1.2.1. 頓轉扭矩
1.2.2. 動態不平衡
1.3. 研究方向與內容
1.4. 論文架構
2. 有限元素法電磁理論
2.1. 電磁理論
2.2. 有限元素法應用原理
2.2.1. 網格安排
2.2.2. 形狀函數
2.2.3. 邊界條件
2.3. 力之基本計算方法
2.3.1. 虛功法
2.3.2. 馬克斯威爾張量應力法
3. 建立3D磁路分析模型流程與步驟
4. 磁漏強度與伺服驅動線路參數之分析與設計
4.1. 計算磁漏強度
4.2. 建立伺服驅動迴路架構
4.3. 實驗結果與分析
5. 電磁設計參數與動態行為之分析與設計
5.1. 軸向預壓力與軸向動態之分析
5.1.1. 建立3D磁路模型分析軸向預壓力
5.1.2. 實驗結果與分析
5.1.2.1. 軸向預壓力計算與量測
5.1.2.2. 轉子與定子相對高度及軸向振動量測
5.2. 電磁設計參數之分析與設計
1.1.1. 電磁參數設計與軸向預壓力之實驗結果與分析
5.2.2. 動態不平衡與動態行為之實驗結果與分析
6. 結論
6.1. 結果分析與討論
6.2. 未來研究方向
參考文獻
自傳
個人著作
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