臺灣博碩士論文加值系統

本文研究將NdFeB N35型永久磁鐵放入電磁吸盤中，使其常時保有磁力，並纏繞線圈通電增加或減少表面磁力，達到更強吸附力或使吸附物輕易卸下。過程中運用ANSYS Maxwell模擬初始模型，並與實體量測比對參數，再以外型不變的情況下，變更內部尺寸進行分析，模擬各位置尺寸的改變對電磁吸盤表面吸附力的影響。
比對結果中，初始模型模擬與實際電磁吸盤通電後的量測結果誤差最大6%。在不同參數模擬結果中，改變外框底面厚度與內徑，並不會對電磁吸盤表面磁通有太大的影響。磁軛尺寸改變，將影響線圈的相對位置與大小或形成新的磁迴路，當線圈距離吸盤表面小於1mm時，會相當程度地影響表面磁通密度。同樣功率下，增加纏繞的線圈，使得通電迴路電阻增加，未必會提高電磁吸盤的性能；而電壓下降提高電流，能直接提高電磁吸盤的表面磁通密度。

The study is on magnetic holding device using NdFeB N35 permanent magnet. The coil winding set up inside the device is energized to generate a magnetic field in order to control magnitude of magnetic flux of the magnetic holding device for the purpose of increasing attachment or otherwise unloading magnetic object. The initial model is analyzed by using ANSYS Maxwell, and the result is compared with the measurement of actual model. The geometric parameters are varied in this analysis when the appearance remains unchanged, in order to investigate the influence on magnetic flux of the device.
In the comparison, the maximum error of magnetic flux between the initial model simulation and the actual measurement of energized magnetic holding device is 6%. In the result of different parameters, variation of bottom thickness and internal diameter of the box do not influence magnetic flux significantly. The pole size will change the relative position of coil winding or form a new magnetic circuit. When coil winding is less than 1mm from the surface, it will influence the magnetic flux of surface to a certain extent. Under same power, increasing number of coils will raise the resistance of copper wire, so performance of the device might not be improved. The result also shows dropping voltage will increase current, thus magnetic flux of surface of magnetic holding device can be enhanced directly.

摘要
Abstract
誌謝
目錄
圖目錄
表目錄
符號說明
第一章 緒論
1.1 前言
1.2 研究動機與方法
1.3 文獻回顧
第二章 理論方法
2.1 磁的定律
2.1.1 庫論定律
2.1.2安培定律
2.1.3 馬克斯威爾方程式
2.2 磁的特性
2.2.1 磁性材料
2.2.2磁異向性
2.2.3 磁滯曲線
2.2.4 磁鐵材料
2.3 ANSYS Maxwell
第三章 實驗量測與數值模擬
3.1. 初始模型與分析模型
3.2. 設備與量測
3.3. 模型建立與分析
第四章 結果與討論
4.1量測與模擬數據
4.2外框尺寸之參數變化結果
4.3磁軛尺寸之參數變化結果
4.4線圈參數變化結果
第五章 結論與未來展望
5.1結論
5.2 未來展望
參考文獻
附錄一
附錄二
附錄三
附錄四

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