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1、第2讲 基于Ansoft RMxprt的三相异步电机设计分析,电机的磁路设计法,RMxprtTM是旋转电机专业设计软件，能快速计算各种电机（感应电机、同步电机、电子或机械换向电机等）的性能指标。RMxprtTM还能快速地对成百上千种设计方案进行评估，并可对预选方案进行设计优化，优化设计后的方案可根据模型的对称性，自动生成合理的二维/三维电磁场有限元分析模型。RMxprtTM为工程人员在产品设计过程中及时地评估和平衡设计方案提供了有效工具。,RMxprtTM,RMxprt概述,随着电机应用领域的不断拓展，工程设计人员在产品小型化、高效率以及高性能方面面临越来越多的挑战。RMxprtTM帮助电机制
2、造者，在设计过程的初始阶段制定成百上千种方案，同时对其性能进行评估，从中优选出最佳、合理的设计方案。,RMxprt概述,具有Windows风格的桌面环境，采用专业的、模版化电机设计界面，RMxprtTM运用经典电机分析理论快速、准确地求解电机的转矩转速特性、损耗、气隙磁通、以及效率等重要特性曲线及参数。集成的参数化分析和优化设计功能使它成为快捷、高效的电机设计专用工具。,RMxprt概述,RMxprtTM与Ansoft的Maxwell集成在同一设计环境中，设计者可单独使用RMxprtTM，也可将其优选出的设计方案自动生成二维/三维有限元分析模型，用Maxwell对电机进行更精确的电磁场分析设计
3、, 实现电机解析-有限元自动设计流程。,特点,-Windows风格介面，模版化参数输入: 工作条件,几何尺寸, 材料特性等 -基于经典的电机分析理论和等效磁路法的快速解析分析 -提供美国、中国材料库和公制、英制单位 -自动排列多种绕组型式或用户自定义任意绕组连接方式 -无刷电机、开关磁阻电机和永磁同步电动机的驱动线路类型、控制方式及开关管参数可设定 -直流电机详细的换向器和电刷参数可设定 -输入数据自动验证功能,特点,-提供丰富的预设计电机模型库 -自动设计功能: 槽形尺寸、线圈匝数、线规、起动电容等 -求解时考虑材料非线性特性、三维斜槽和端部效应 -参数化和优化设计功能： -尺寸等参数无需指
4、定，可用一定变化范围的变量表示 -数据、图形、自定义结果输出模式 -多种负载种类,三相异步电机RMxprt设计（1） 项目建立,三相异步电机RMxprt设计（2） 模型建立,或双击项目管理树对应项，在屏幕上弹出“Properties”窗口，输入模型数据后，点击“确定”退出。,定子数据输入,Relative Permeability:相对磁导率 simple: 导磁性能各向同性且BH关系为线性；Value值为1 Anisotropic : 导磁性能各向异性材料 需要输入三个方向的导磁性能 X:T(1,1) Y:T(2,2) Z:T(3,3) Nonlinear: 导磁性能非线性,Bulk Con
5、ductivity:电导率 类型： Simple:各向同性 Anisotropic :各向异性,Magnetic Coercivity:磁矫顽力,Core Loss Type: 铁芯损耗类型 Electrical Steel:电工钢片 Power Ferrite:功率铁氧体,定子槽形,定子绕组,定子绕组端部数据和绝缘数据,定子绕组类型,转子数据,转 子 槽 类 型,转子槽形数据,转子铸铝绕组,轴材料设定(磁性、非磁性),仿真设置,求解异步电机,结果查看,设计单,Three-Phase Induction Motor Design File: Setup1.res GENERAL DATA Gi
6、ven Output Power (kW): 11 Rated Voltage (V): 380 Winding Connection: Delta Number of Poles: 4 Given Speed (rpm): 1460 Frequency (Hz): 50 Stray Loss (W): 110 Frictional Loss (W): 102 Windage Loss (W): 0 Type of Load: Constant Torque Operating Temperature (C): 75,STATOR DATA Number of Stator Slots: 36
7、 Outer Diameter of Stator (mm): 260 Inner Diameter of Stator (mm): 170 Type of Stator Slot: 2 Dimension of Stator Slot hs0 (mm): 0.8 hs1 (mm): 0.975 hs2 (mm): 15.83 bs0 (mm): 3.8 bs1 (mm): 7.28 bs2 (mm): 10.05 Top Tooth Width (mm): 7.86988 Bottom Tooth Width (mm): 7.86977,STATOR DATA,Length of Stato
8、r Core (mm): 155 Stacking Factor of Stator Core: 0.98 Type of Steel: 50DW470 Number of lamination sectors 0 Press board thickness (mm): 0 Magnetic press board No Number of Parallel Branches: 1 Type of Coils: 11 Coil Pitch: 5 Number of Conductors per Slot: 29 Number of Wires per Conductor: 2 Wire Dia
9、meter (mm): 1.291 Wire Wrap Thickness (mm): 0.04,STATOR DATA,Wedge Thickness (mm): 2 Slot Liner Thickness (mm): 0.3 Layer Insulation (mm): 0 Slot Area (mm2): 185.272 Net Slot Area (mm2): 151.148 Slot Fill Factor (%): 67.98 Limited Slot Fill Factor (%): 75 Wire Resistivity (ohm.mm2/m): 0.0217 Top Fre
10、e Space in Slot (%): 0 Bottom Free Space in Slot (%): 0 Conductor Length Adjustment (mm): 0 End Length Correction Factor 1 End Leakage Reactance Correction Factor 1,ROTOR DATA Number of Rotor Slots: 26 Air Gap (mm): 0.5 Inner Diameter of Rotor (mm): 60 Type of Rotor Slot: 2 Dimension of Rotor Slot h
11、s0 (mm): 0.5 hs1 (mm): 0.95 hs2 (mm): 25 bs0 (mm): 1 bs1 (mm): 4.8 bs2 (mm): 4.8 Cast Rotor: Yes Half Slot: No,ROTOR DATA,Length of Rotor (mm): 155 Stacking Factor of Rotor Core: 0.98 Type of Steel: 50DW470 Skew Width: 1 End Length of Bar (mm): 0 Height of End Ring (mm): 28.5 Width of End Ring (mm):
12、 15 Resistivity of Rotor Bar at 75 Centigrade (ohm.mm2/m): 0.0263158 Resistivity of Rotor Ring at 75 Centigrade (ohm.mm2/m): 0.0263158 Magnetic Shaft: No,MATERIAL CONSUMPTION,Armature Copper Density (kg/m3): 8900 Rotor Bar Material Density (kg/m3): 2689 Rotor Ring Material Density (kg/m3): 2689 Arma
13、ture Core Steel Density (kg/m3): 7800 Rotor Core Steel Density (kg/m3): 7800 Armature Copper Weight (kg): 7.80991 Rotor Bar Material Weight (kg): 1.43372 Rotor Ring Material Weight (kg): 1.00758 Armature Core Steel Weight (kg): 28.11 Rotor Core Steel Weight (kg): 19.152 Total Net Weight (kg): 57.513
14、2 Armature Core Steel Consumption (kg): 55.0598 Rotor Core Steel Consumption (kg): 26.8931,RATED-LOAD OPERATION,Stator Resistance (ohm): 0.926082 Stator Resistance at 20C (ohm): 0.761777 Stator Leakage Reactance (ohm): 2.11611 Rotor Resistance (ohm): 0.530839 Rotor Resistance at 20C (ohm): 0.436658
15、Rotor Leakage Reactance (ohm): 5.4719 Resistance Corresponding to Iron-Core Loss (ohm): 1918.47 Magnetizing Reactance (ohm): 99.6363 Stator Phase Current (A): 12.0556 Current Corresponding to Iron-Core Loss (A): 0.186727 Magnetizing Current (A): 3.59539 Rotor Phase Current (A): 10.7566,RATED-LOAD OP
16、ERATION,Copper Loss of Stator Winding (W): 403.784 Copper Loss of Rotor Winding (W): 184.262 Iron-Core Loss (W): 200.675 Frictional and Windage Loss (W): 103.101 Stray Loss (W): 110 Total Loss (W): 1001.82 Input Power (kW): 12.1174 Output Power (kW): 11.1156 Mechanical Shaft Torque (N.m): 71.9265 Efficiency (%): 91.7324 Power Factor: 0.873688 Rated Slip: 0.0161591 Rated Shaft Speed (rpm): 1475.76,NO-LOAD OPERATION,No-Load Stator Resistance (
