【建模步驟】
- Open the Modeling module [PEmag], either from within PExprt or directly from the Windows Start Menu.第一步通過開始菜單打開PEmag軟件。
- Define the core shape and size. 定義磁芯的形狀和尺寸
- Define the winding setup. 定義繞組設置
- Assign the winding setup to the core legs. 將繞組設置分配給磁芯引腳
- Create connections. 創建連接
- Define the PCB technology. 設置PCB相關的參數
- Assign the conductors and insulators. 分配導體和絕緣體
- Define the number of turns and insulator width. 定義匝數和絕緣體寬度
- Assign the core material. 為磁芯分配材料
- Define the model properties. 定義模型屬性
- Generate the model. 生成模型
- Explore the results. 導出結果
【建模示例】
Step01 Create the PEmag Design.建立PEmag設計的文檔
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Open PEmag using the Windows Start Menu and create an empty design using File/New.
從Windows 的啟動菜單打開PEmag，並且使用File/New建立一個新的設計
- Save the PEmag design using File/Save Assign a name to the file, e.g. Planar_Transformer.pmg.
- 使用File / Save保存PEmag設計為文件分配一個名稱，例如 Planar_Transformer.pmg。
使用File / Save保存PEmag設計為文件分配一個名稱，例如 Planar_Transformer.pmg。
Step02: Define Core Shape and Size. 定義磁芯的形狀和尺寸
To define the core:
- Expand the Ferroxcube library. 展開Ferroxcube庫
- Expand the EI core shape. 展開EI磁芯形狀庫，並找到E32/6/20磁芯
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Drag the E32/6/20 core, and drop it on the Cross Section Area (black area at the right bottom) of the working window. The core cross section appears.
拖動E32/6/20磁芯，並將其放在工作窗口的"橫截面區域"（右下角黑色區域）上，該磁芯形狀的橫截面將出現在視圖中。
- Double-click the E32/6/20 core element in the Component Library.雙擊Component Library中的E32/6/20磁芯，設計其參數。
- Select Double 2D (XY Plane). 選擇Double 2D(XY Plane)
- Click the Dimensions Tab. 單擊選中Dimensions 標簽
- Enter 0.254 mm (10 mils) in the Central Leg Gap field. 設置中間氣隙間距為10mils
設置完成的界面如下圖所示。
Step03: Define Winding Setup：定義繞組設置
- Select the Windings Tab at the Library Tree Area.在庫的列表中選中Windings 標簽
- Expand the Ferroxcube library. 展開Ferroxcube庫
- Drag the 9 Layer Planar element, and drop it on the Cross Section Area (black area at the right bottom) of the working window. The winding setup appears in the Winding Setup Area of the working window 拖動9層平面元素，並將其拖放到工作窗口的"橫截面區域"（右底部的黑色區域）上。 繞組設置出現在工作窗口的"繞組設置"區域中
- Double-click the 9 Layer Planar element in the Component Library.雙擊組件庫中的9 Layer Planar元素。
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Enter the following values in the listed fields:根據如下界面配置參數。
- Winding Setup Name: Outer_Legs
- Number of pins: 6
- Number of layers: 15
- Top Margin Tape: 0.35 mm
- Central Margin Tape: 0.2 mm
- Winding Strategy: Top-Down
- Click OK to continue
接下來，需要根據實際情況將這些層定義為導體或者絕緣體。
Define the layers:通過以下步驟進行層的定義
摁住Ctrl鍵依次選中需要進行修改的層，然后點擊圖上紅色箭頭所示，將層修改為走線。修改后的效果如圖所示。
Step04: Assign the winding setup to the core legs. 將繞組設置分配給磁芯引腳
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Select the Current Design Tab in the Winding Setup Area of the working window.
在工作窗口的"繞組設置"區域中選擇"當前設計"選項卡。
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Click the Winding Setup [Center Leg] element in the list. The available winding setups (the ones included in the Component Library folder) appear at the bottom.
單擊列表中的"繞組設置[Center Leg]"元素。 可用的繞組設置（"組件庫"文件夾中包含的繞組設置）顯示在底部。
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Click the No Winding Setup element in the available elements list.
在可用元素列表中單擊"無繞組設置"元素。
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Click the Winding Setup [Left Leg] element in the list. The available winding setups (the ones included in the Component Library folder) appear at the bottom.
單擊列表中的"繞組設置" [Left Leg]元素。 可用的繞組設置（"組件庫"文件夾中包含的繞組設置）顯示在底部。
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Click the Outer_Legs element in the available elements list.
單擊可用元素列表中的Outer_Legs元素。
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Click the Winding Setup [Right Leg] element in the list. The available winding setups (the ones included in the Component Library folder) appear at the bottom.
單擊列表中的繞組設置[Right Leg]元素。 可用的繞組設置（"組件庫"文件夾中包含的繞組設置）顯示在底部。
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Click the Outer_Legs element in the available elements list.
單擊可用元素列表中的Outer_Legs元素。
Step05:Create Connections 建立連線，根據實際需要連接繞組
The primary A winding layers (3 and 11) are connected in series, the primary B winding layers (5 and 13) are connected in series, and the secondary C layers (1, 7, 9, and 15) are connected in parallel
初級A繞組層（3和11）串聯連接，初級B繞組層（5和13）串聯連接，次級C層（1、7、9和15）並聯
To connect the series layers of winding A：連接繞組A
- Choose the Connections/Add menu item 選中Connections/Add 菜單
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Click on pin 1 (left) on the bottom of the Winding Setup Area. A green circle indicates that the pin is selected.
單擊"繞組設置"區域底部的引腳1（左）。 綠色圓圈表示該引腳已選中。
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Click on the "dotted" terminal (number 1) of layer 3. A yellow connection is made.
單擊第3層的"虛線"端子（編號1）。進行黃色連接。
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Click on the "non-dotted" terminal (number 2) of layer 3. Notice the green selection mark.
單擊第3層的"非虛線"端子（編號2）。注意綠色選擇標記。
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Click on the "dotted " terminal of layer 11.
單擊第11層的"虛線"終端。
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Click on the "non-dotted" terminal of layer 11
單擊第11層的"非虛線"終端
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Click on pin 2 on the bottom of the Winding Setup Area. Note this will change pin names to 'A.' (Naming is explained in Terminal Names of PEmag Models.)
單擊繞組設置區域底部的引腳2。 請注意，這會將引腳名稱更改為" A"。 （在PEmag模型的終端名稱中解釋了命名。）
按照相同的方式進行繞組B和繞組C的連接。
繞組B是5和13層串聯連接，繞組C是1、7、9、15並聯連接。
Step06:Define PCB Technology 設置PCB相關的參數
- Select the Wires/Ins Tab in the Library Tree Area.在"庫樹"區域中選擇"導線/插入"選項卡。
- Expand the Ferroxcube library. 擴展Ferroxcube庫
- Expand the Planar library. 擴展Planar 庫
- Drag the Copper_100um element, and drop it on the Component Library folder in the Library Tree.拖動Copper_100um元素，並將其拖放到"庫樹"中的"組件庫"文件夾中。
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Double-click the Copper_100um element in the Component Library.
雙擊組件庫中的Copper_100um元素。
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Enter the following values in the listed fields: 在列出的字段中輸入以下值
- Name: Copper_150um_9mm
- Wire height: 0.15 mm
- Wire width: 8.6 mm
- Insulator thickness: 0 mm
- Turns spacing: 0.1 mm
- Resistivity: 2.21·10-8 ohm·m
- Wire Thermal Conductivity: 400 W/ºC/m
- Wire Thermal Emissivity: 0.04
- Insulator Thermal Conductivity: 0.3 W/ºC/m
- Insulator Thermal Emissivity: 0.8
- Click OK to continue. 單擊ok繼續下一步操作
- Drag the previously created Copper_150um_9mm element, and drop it on the Component Library folder in the Library Tree in order to copy it. A new element named Copper_150um_9mm(1) appears.拖動先前創建的Copper_150um_9mm元素，並將其拖放到"庫樹"中的"組件庫"文件夾中以進行復制。 出現一個名為Copper_150um_9mm（1）的新元素。
- Double-click the Copper_150um_9mm(1) element in the Component Library.在組件庫中雙擊Copper_150um_9mm（1）元素。
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Enter the following values in the listed fields:在列出的字段中輸入以下值：
- Name: Copper_150um_2mm
- Wire height: 0.15 mm
- Wire width: 2 mm
- Insulator thickness: 0 mm
- Turns spacing: 0.2 mm
- Resistivity: 2.21·10-8 ohm·m
- Wire Thermal Conductivity: 400 W/ºC/m
- Wire Thermal Emissivity: 0.04
- Insulator Thermal Conductivity: 0.3 W/ºC/m
- Insulator Thermal Emissivity: 0.8
- Click OK to continue. 單擊ok繼續下一步操作
- Expand the Ferroxcube library.展開 Ferroxcube 庫
- Expand the Insulator library. 展開 Insulator庫
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Drag the FR4_200um element, and drop it on the Component Library folder in the Library 將FR4_200um拖到器件庫
Step07:Assign Conductors and Insulators 分配導體和絕緣體
Drag the elements from the Component Library folder, and drop them on the appropriate layer at the Winding Setup Area.
將元素從"組件庫"文件夾中拖放到"繞組設置"區域的相應層上。
Layer 1 |
Copper_150um_9mm |
Layer 2 |
FR4_200um |
Layer 3 |
Copper_150um_2mm |
Layer 4 |
FR4_200um |
Layer 5 |
Copper_150um_2mm |
Layer 6 |
FR4_200um |
Layer 7 |
Copper_150um_9mm |
Layer 8 |
FR4_200um |
Layer 9 |
Copper_150um_9mm |
Layer 10 |
FR4_200um |
Layer 11 |
Copper_150um_2mm |
Layer 12 |
FR4_200um |
Layer 13 |
Copper_150um_2mm |
Layer 14 |
FR4_200um |
Layer 15 |
Copper_150um_9mm |
Step08:Define Turns and Insulator Width 定義匝數和絕緣體
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Right-click the appropriate layer in the Winding Setup Area of the working window. The following window appears
在工作窗口的"繞組設置"區域中，右鍵單擊相應的層。 出現以下窗口
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Assign the following number of turns to the following layers: 將以下匝數分配給以下層
- Layers 1, 7, 9, and 15: 1 turn
- Layers 3, 5, 11, and 13: 4 turns
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To define the width of each insulator layer
- If you right-click an insulator layer, the following window appears:
Assign 8.6 mm for all the width of all insulator layers (layers 2, 4, 6, 8, 10, 12, and 14).
絕緣體層寬度為8.6mm
Step09:Assign the Core Material 為磁芯分配材料
- Select the Core Material Tab in the Library Tree Area. 在"庫樹"區域中選擇"核心材料"選項卡。
- Expand the Ferroxcube library. 展開Ferroxcube庫
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Drag the 3F3 core material and drop it on the Cross-Section Area (black area at the right bottom) of the working window. A warning message appears
將3F3核心材料拖放到工作窗口的"橫截面"區域（右下黑色區域）上。 出現警告信息
- Click OK to dismiss the window. The E32/6/20 core properties window appears.
- 單擊確定以關閉該窗口。 出現E32 / 6/20核心屬性窗口。
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Select the Material Tab 選擇Material標簽。
- Click the Apply PEmag calculated Al button to assign the Al value for this core shape/size/material combination.
- 單擊"應用PEmag計算出的Al"按鈕，為該鐵心形狀/尺寸/材料組合指定Al值。
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Click OK to continue 單擊ok進行下一步
Step10:Define Model Properties 配置模型參數
- Select Modeler/Model Properties menu item The Model Properties window appears. 選擇Modeler / Model Properties菜單項。將顯示Model Properties窗口。
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Change the number of FEA Frequency steps to 5. 將 " FEA頻率 "步數更改為 5。
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Select the Capacitances Tab.
選擇"電容"選項卡。
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Click the Model With Capacitances Calculation button to include capacitive effects in the model.
單擊"帶電容模型計算"按鈕以在模型中包括電容效應。
- Select the Model Language Tab. 選擇"模型語言"選項卡。
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Click the Twin Builder button to select Twin Builder as the model netlist language. 單擊 " Twin Builder"按鈕以選擇 " Twin Builder"作為模型網表語言。
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Select the Curve Fitting Setting Tab. 選擇 "曲線擬合設置 "選項卡。
- Assign the following parameters:
- Curve Fitting Target Error: 5%
- Curve Fitting Method: Fine
- Fitting Parameters: Per Unit
- Perturbation: High
- Ignore first frequency point: Selected
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Click OK to continue. 單擊ok進行下一步
到此，模型已經建立完成，接下來就是如何對其進行輸出並導入到Maxwell中進行仿真分析。