【目的】
如何在2D靜態磁場解釋器中計算力。
Discuss how to set up a force calculation in the 2D Magnetostatic Solver.
As shown in the following picture, a coil and slug are drawn in a plane using RZ symmetry. The coils carry a current that exert a vertical force on the ferromagnetic slug.
如下圖所示，使用RZ對稱性在平面上繪制了線圈和凸塊。 線圈載有電流，該電流在鐵磁塊上施加垂直力。
【建模過程】
Step01:Create Design 新建設計工程文件
– Select the menu item Project -> Insert Maxwell 2D Design,然后對其進行重命名和保存
Step02：Set Solution Type 設置解釋器類型（磁場分析）
– Select the menu item Maxwell 2D ->Solution Type
– Solution Type Window:
1. Geometry Mode: Cylindrical about Z
2. Choose Magnetic > Magnetostatic
3. Click the OK button
如下圖：
Geometry Mode:幾何模式
Cylindrical about Z，關於Z軸的圓柱體
創建基於Z軸的圓柱體，並對其磁場進行分析
Step03： Create Slug （創建模型中的凸塊）
該模型的大小為XZ平面上5*15大小的一個矩形，其對角線坐標分別是(0,0,-10)和(5,0,5)，顏色設置為灰色，材料為steel_1008（冷鐓鋼）
– Select the menu item Draw ->Rectangle
1. Using the coordinate entry fields, enter the position of rectangle – X: 0, Y: 0, Z: -10, Press the Enter key
2. Using the coordinate entry fields, enter the opposite corner – dX: 5, dY: 0, dZ: 15, Press the Enter key
– Change the name of resulting sheet to Slug and color to Gray
– Change the material of the sheet to Steel_1008
繪制完的結果如下圖所示
Step04： Create Coil （創建模型中的線圈）
該模型的大小為XZ平面上4*20大小的一個矩形，其對角線坐標分別是(6,0,0)和(10,0,20)，顏色設置為棕色，材料為Copper（銅）
– Select the menu item Draw-> Rectangle
1. Using the coordinate entry fields, enter the position of rectangle – X: 6, Y: 0, Z: 0, Press the Enter key
2. Using the coordinate entry fields, enter the opposite corner – dX: 4, dY: 0, dZ: 20, Press the Enter key
– Change the name of resulting sheet to Coil and color to Brown
– Change the material of the sheet to Copper
繪制完的結果如下圖所示
Step05： Define Region（定義區域）
• Create Simulation Region
– Select the menu item Draw ->Region
– In Region window,
1. Pad all directions similarly: þ Checked
2. Padding Type: Percentage Offset
3. Value: 100
4. Press OK
• You should see a message indicating that the –X direction is set to zero due to RZ-symmetry about the Z-axis.
繪制完的結果如下：
Step06:Assign Excitations 添加激勵
• Assign Excitations 為線圈添加1000A負向電流激勵
– Select the sheet Coil from history tree 首先需要選中Coil這個模型
– Select the menu item Maxwell 2D ->Excitations -> Assign -> Current
• Name: Current1
• Value: 1000
• Ref. Direction: Negative (current will be in the negative Y direction) 即電流會沿着y軸向負向流動
設置結果如下
Step07:Assign Boundary and Parameter 添加邊界和參數
•Assign Boundary to Region Edges
– Select the object Region from history tree
– Select the menu item Edit -> Select ->All Object Edges
– Select the menu item Maxwell 2D -> Boundaries ->Assign -> Balloon
– In Balloon Boundary window,
• Press OK
Note: On symmetry axis, "Balloon Boundary" assignment is automatically skipped, This can also be achieved by selecting the edges of region which are not on symmetry axis.
注意：在對稱軸上，將自動跳過"氣球邊界"分配，這也可以通過選擇不在對稱軸上的區域的邊緣來實現。
Step08: Assign Force Calculation 添加磁力計算
– Select the object Coil from history tree
– Select the menu item Maxwell 2D -> Parameters -> Assign ->Force
– In Force Setup window,
• Press OK
Step09: Analyze 分析
• Create an analysis setup: 設置 Anslysis setup
– Select the menu item Maxwell 2D -> Analysis Setup -> Add Solution Setup
– Solution Setup Window:
1. General Tab
– Maximum Number of Passes: 15
2. Click the OK button
• Start the solution process: 開始進行仿真
– Select the menu item Maxwell 2D -> Analyze All
Step10:Solution Data 查看仿真結果數據
• View Solution Information
– Select the menu item Maxwell 2D -> Results -> Solution Data
• To View Convergence
– Select the Convergence tab
• To View Calculated Force Value
– Select the Force tab
Step11:Create Field Plot 繪制磁力場
• Plot Magnetic Flux Density
– Expand the history tree for Planes
– Select the plane Global:XZ
– Select the menu item Maxwell 2D -> Fields -> Fields -> B -> Mag_B
– In Create Field Plot window,
• Press Done
