电机振动噪声建模分析：基于导入DXF转子模型导入MANATEE的振动噪声仿真分析

声学工程师小吴 2023年6月20日浏览：1439 收藏：3

前言

电机振动噪声建模分析：基于导入DXF转子模型导入MANATEE的振动噪声仿真分析的图1

随着电机结构越来越复杂对软件仿真结构的通用型要求越来越高，目前集成在MANATEE中的电机结构是有限的，因此如何能够对复杂结构的电机在MANATEE中进行仿真至关重要。本文针对此问题以一款永磁同步电机为例，通过应用DXF文件与MANATEE软件进行耦合仿真。

DXF文件导入流程

1. 导入dxf文件时需要设置工程文件参数

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、转子模型导入

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. 定义定转子右边界

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).

边界条件设置

对于空气区域，MANATEE可以将他们进行分配，使用与真实电机最匹配的拓扑非常重要。如果电机有一些额外的孔（例如通风管道），可以为MANATEE提供设置这些空气区域的坐标：

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

如果激活了对称性，MANATEE也将自动分配边界条件，假设铁芯边缘位于θ= 0。在铁芯边缘不是直线的情况下（例如由于缺口或通风），需要在边缘线的每个部分上提供点的坐标：

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将自动定义模拟的气隙。为避免错误，我们强烈建议您使用：

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

实例求解

本文以一台48S8P电机为例进行求解，在用MANATEE之前必须添加一些的程序。