Maxwell瞬态场仿真实例

Draw > Box

Position: (94,0,49)

Box尺寸:(XSize, YSize, ZSize)>(200,200,100) 重命名为:coil

按 E 键,将体选择改为边选择 选中coil模型的4个竖边, 将所选边缘圆滑化

Modeler > Fillet Fillet 参数设置: 1. Fillet Radius: 50mm 2. Setback Distance: 0mm 选中coil和coilhole模型

Modeler > Boolean > Subtract Blank Parts: coil Tool Parts: coilhole 得到coil模型如下: 将coil的材料改为copper

创建相对坐标系

Modeler > Coordinate System > Create >Relative CS > Offset 相对坐标偏置 X: 200, Y: 100, Z: 0

设置激励电流加载面 选中coil

Modeler > Surface > Section > XZ Modeler > Boolean > Separate Bodies

Del

2. 设置激励 选中线圈的截面

Maxwell 3D> Excitations > Assign > Current Name: Current1 Value: 2742 A Type: Stranded

设置涡流存在区域

Maxwell 3D > Excitations > Set Eddy Effects

创建计算区域(Region) Draw > Region

创建哑元Dummy

Dummy技术的优点:

只对所关心的局部区域进行加密剖分,提高该区域的计算精度,无需对整个区域进行加密,节约了计算资源。 将坐标系改为Global CS Draw > Box

Position: (-3,68,30)

Box尺寸:(XSize, YSize, ZSize)>(300,8,8) 重命名为:dummy 材料为真空

设置Dummy的剖分参数 选中Dummy

Maxwell > Mesh Operations > Assign > On Selection >Length Based. 不选Restrict Length of Elements 选中Restrict the Number of Elements Maximum Number of Elements:1000

Select the menu item Maxwell>Analysis Setup > Apply Mesh Operations

3.设置自适应计算参数(Create Analysis Setup) Maxwell 3D > Analysis Setup > Add Solution Setup

最大迭代次数: Maximum number of passes : 10 误差要求: Percent Error: 2%

每次迭代加密剖分单元比例: Refinement per Pass : 50%

设置激励源的频率 Solver > Adaptive Frequency: 200 Hz

4. Check & Run

5.查看结果

使用Calculator计算器

绘出线段A(0,72,34),B(288,72,34)上的磁感应强度B的Z向分量实部值

设置Global CS为工作坐标系 Draw > Line

Select the menu item Draw > Line 输入起点:X: 0.0, Y: 72.0, Z: 34.0 Enter

输入终点:X: 288.0, Y: 72.0, Z: 34.0 Enter

将线段重命名为:FieldLine

计算B的z向分量实部

Maxwell 3D> Fields > Calculator Quantity: B

Vector: Scal? > Scalar Z General: Complex > Real Smooth Number Type: Scalar Value: 10000 OK

General: * 点击Add

输入Named Expression:Name: Bz_real Done

Maxwell 3D > Results > Create Fields Report > Rectangular plot 设置如下图:

点击New Report

绘出stock中的涡流辐值分布: 选中stock

Maxwell 3D > Fields > Fields > J > Mag_J

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