電機振動噪聲建模分析：基于導入DXF轉子模型導入MANATEE的振動噪聲仿真分析

聲學工程師小吳

2023年6月20日 14:12

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前言

電機振動噪聲建模分析：基于導入DXF轉子模型導入MANATEE的振動噪聲仿真分析的圖1

隨著電機結構越來越復雜對軟件仿真結構的通用型要求越來越高，目前集成在MANATEE中的電機結構是有限的，因此如何能夠對復雜結構的電機在MANATEE中進行仿真至關重要。本文針對此問題以一款永磁同步電機為例，通過應用DXF文件與MANATEE軟件進行耦合仿真。

DXF文件導入流程

1. 導入dxf文件時需要設置工程文件參數

Input.Simu.is_stator_dxf = 0 ; % (advanced) 1 to import a *.dxf file instead of drawing stator geometry in FEMM using MANATEE algorithms
Input.Simu.is_rotor_dxf = 1 ; % (advanced) 1 to import a *.dxf file instead of drawing rotor geometry in FEMM using MANATEE algorithms

2. 定、轉子模型導入

Input.Simu.filename_stator_dxf = 'machine_stator.dxf' ; % (advanced) path of the *.dxf file for stator geometry
Input.Simu.filename_rotor_dxf = 'machine_rotor.dxf' ; % (advanced) name of the *.dxf file for rotor geometry WARNING : the dxf file must be in the MATLAB path

3. 定義定轉子右邊界

Input.Simu.shift_stator_dxf = 0 ; % (advanced) value of the shift angle to set the stator right edge at theta=0° (WARNING: it is highly recommended to already have the first stator edge at theta=0 in the dxf file).
Input.Simu.shift_rotor_dxf = 0 ; % (advanced) value of the shift angle to set the rotor right edge at theta=0° (WARNING: it is highly recommended to already have the first rotor edge at theta=0 in the dxf file).

邊界條件設置

對于空氣區域，MANATEE可以將他們進行分配，使用與真實電機最匹配的拓撲非常重要。如果電機有一些額外的孔（例如通風管道），可以為MANATEE提供設置這些空氣區域的坐標：

Input.Simu.list_air_rotor_dxf = {} ; % (advanced) list of coordinates {[x_1,y_1] ; ... ; [x_n,y_n]} to automatically assign n additional air labels in FEMM, for example in rotor pockets

如果激活了對稱性，MANATEE也將自動分配邊界條件，假設鐵芯邊緣位于θ= 0。在鐵芯邊緣不是直線的情況下（例如由于缺口或通風），需要在邊緣線的每個部分上提供點的坐標：

Input.Simu.list_bc_rotor_dxf = {} ; % (advanced) In case of (anti)-symmetry, list of coordinates {[x_1,y_1] ; ... ; [x_n,y_n]} which are the middle of each segment constituting the rigth rotor edge on which (anti-)periodic BC are applied

最后，MANATEE將自動定義模擬的氣隙。為避免錯誤，我們強烈建議您使用：

Input.Simu.is_slidingBand = 1 ; % (advanced) 1 to use the airgap sliding band in FEMM simulation to reduce meshing noise.

實例求解

本文以一臺48S8P電機為例進行求解，在用MANATEE之前必須添加一些的程序。