臺灣博碩士論文加值系統

本論文針對一具有軸向磁場及徑向氣隙架構之無刷直流風扇馬達提供完整的三維電磁分析。首先使用等效磁路法建構系統磁路模型，快速有效的判斷電機內磁場分佈情形，由於此電機具有特殊的軸向磁場及徑向氣隙架構，以傳統單一分支的磁路分析法難以掌握，因此這裡採用複數分支以近似單一磁極之磁路。接著再透過有限元素分析套裝軟體精密的計算，進行三維空間電磁作用力及漏磁通量之探討。此外，為了改善電機轉子搖晃振盪的現象，這裡在定子底部加入一矽鋼吸引片，藉著永久磁鐡與矽鋼吸引片之間的電磁作用，在軸方向產生一股導正的吸引力，本論文將透過有限元素分析軟體來了解加入此改良架構對電機三維作用力的影響，同時也要觀察矽鋼吸引片除了能導正軸心運轉外，是否會對電機的磁路結構及電磁轉矩造成不良影響，藉此完整掌握該架構之功能及其所帶來的利弊。

This thesis provides a detailed field analysis of a specially designed axial-flow radial-flux permanent magnet motor for cooling fan applications. By implementing an iron strip segment at the stator base, this motor can provide a stable guidance force in its axial direction, such that the operational vibration effects can be minimized and the undesired forces applied onto associated bearing system can be alleviated. Supported by adaptive magnetic equivalent circuit and three-dimensional finite element analyses, the motor operational fluxes and forces can be analyzed. Results show that excellent performance and enhanced reliability objectives can all be achieved.

目錄

頁次
中文摘要.................................................Ⅰ
英文摘要.................................................Ⅱ
目錄.....................................................Ⅲ
圖目錄...................................................Ⅴ
表目錄...................................................Ⅶ

第一章 緒論.............................................1
1.1 研究動機...................................1
1.2 研究重點及方法.............................5

第二章 所探究無刷直流電動機之硬體架構...................9
2.1 電動機之幾何架構...........................9
2.2 等效磁路法估算............................16
2.3 等效磁路後處理計算........................25

第三章 靜態及類動態電磁場分析..........................28
3.1 有限元素分析法介紹........................28
3.2 有限元素分析法參數設定....................30
3.3 電磁結果分析..............................34

第四章 所探究無刷直流電動機之架構改善..................51
4.1 矽鋼吸引片之幾何結構....................51
4.2 加入矽鋼吸引片之操作性能改變..............54

第五章 討論與結論......................................59

參考文獻.................................................62
作者自述.................................................64

參考文獻

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