电机CAD技术：ch2 基于Ansoft RMxprt的三相异步电机设计分析

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。RMxprtTMRMxprt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帮助电机制造者，在设

2、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, 实现电机解析

3、-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：-尺寸等参数无需指定，可用一定变化范围的变量表

4、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1Anisotropic : 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 Conductivity:电导率 类型： Simple:

5、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 Given Output Power (kW):11Rated Voltage (V):3

6、80Winding Connection:DeltaNumber of Poles:4Given Speed (rpm):1460Frequency (Hz):50Stray Loss (W):110 Frictional Loss (W):102 Windage Loss (W):0 Type of Load:Constant TorqueOperating Temperature (C):75STATOR DATA Number of Stator Slots:36Outer Diameter of Stator (mm): 260Inner Diameter of Stator (mm)

7、: 170Type of Stator Slot:2Dimension 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): 10.05Top Tooth Width (mm): 7.86988Bottom Tooth Width (mm): 7.86977STATOR DATA Length of Stator Core (mm): 155Stacking Factor of Stator Core:0.98Type of Steel:50DW47

8、0Number of lamination sectors0Press board thickness (mm): 0Magnetic press boardNoNumber of Parallel Branches:1Type of Coils:11Coil Pitch:5Number of Conductors per Slot:29Number of Wires per Conductor:2Wire Diameter (mm):1.291Wire Wrap Thickness (mm):0.04STATOR DATA Wedge Thickness (mm):2Slot Liner T

9、hickness (mm):0.3Layer Insulation (mm):0Slot Area (mm2):185.272Net Slot Area (mm2):151.148Slot Fill Factor (%):67.98Limited Slot Fill Factor (%):75Wire Resistivity (ohm.mm2/m):0.0217Top Free Space in Slot (%):0Bottom Free Space in Slot (%):0Conductor Length Adjustment (mm): 0End Length Correction Fa

10、ctor1End Leakage Reactance Correction Factor1 ROTOR DATA Number of Rotor Slots:26Air Gap (mm): 0.5Inner Diameter of Rotor (mm): 60Type of Rotor Slot:2Dimension of Rotor Slot hs0 (mm): 0.5 hs1 (mm): 0.95 hs2 (mm): 25 bs0 (mm): 1 bs1 (mm): 4.8 bs2 (mm): 4.8Cast Rotor:YesHalf Slot:NoROTOR DATALength of

11、 Rotor (mm): 155Stacking Factor of Rotor Core:0.98Type of Steel:50DW470Skew Width:1End Length of Bar (mm): 0Height of End Ring (mm): 28.5Width of End Ring (mm): 15Resistivity of Rotor Bar at 75 Centigrade (ohm.mm2/m):0.0263158Resistivity of Rotor Ring at 75 Centigrade (ohm.mm2/m):0.0263158Magnetic S

12、haft:NoMATERIAL CONSUMPTIONArmature Copper Density (kg/m3): 8900Rotor Bar Material Density (kg/m3): 2689Rotor Ring Material Density (kg/m3): 2689Armature Core Steel Density (kg/m3): 7800Rotor Core Steel Density (kg/m3): 7800Armature Copper Weight (kg): 7.80991Rotor Bar Material Weight (kg): 1.43372R

13、otor Ring Material Weight (kg): 1.00758Armature Core Steel Weight (kg): 28.11Rotor Core Steel Weight (kg): 19.152Total Net Weight (kg): 57.5132Armature Core Steel Consumption (kg): 55.0598Rotor Core Steel Consumption (kg): 26.8931RATED-LOAD OPERATION Stator Resistance (ohm):0.926082Stator Resistance

14、 at 20C (ohm):0.761777Stator Leakage Reactance (ohm):2.11611Rotor Resistance (ohm):0.530839Rotor Resistance at 20C (ohm):0.436658Rotor Leakage Reactance (ohm):5.4719Resistance Corresponding to Iron-Core Loss (ohm):1918.47Magnetizing Reactance (ohm):99.6363Stator Phase Current (A):12.0556Current Corr

15、esponding to Iron-Core Loss (A):0.186727Magnetizing Current (A):3.59539Rotor Phase Current (A):10.7566RATED-LOAD OPERATION Copper Loss of Stator Winding (W):403.784Copper Loss of Rotor Winding (W):184.262Iron-Core Loss (W):200.675Frictional and Windage Loss (W):103.101Stray Loss (W):110Total Loss (W

16、):1001.82Input Power (kW):12.1174Output Power (kW):11.1156Mechanical Shaft Torque (N.m):71.9265Efficiency (%):91.7324Power Factor:0.873688Rated Slip:0.0161591Rated Shaft Speed (rpm):1475.76 NO-LOAD OPERATION No-Load Stator Resistance (ohm):0.926082No-Load Stator Leakage Reactance (ohm):2.1167No-Load

17、 Rotor Resistance (ohm):0.530608No-Load Rotor Leakage Reactance (ohm):5.47774No-Load Stator Phase Current (A):3.74302No-Load Iron-Core Loss (W):216.191No-Load Input Power (W):469.962No-Load Power Factor:0.0843587No-Load Slip:0.000134133No-Load Shaft Speed (rpm):1499.8 BREAK-DOWN OPERATION Break-Down

18、 Slip:0.07Break-Down Torque (N.m):155.229Break-Down Torque Ratio:2.15816Break-Down Phase Current (A):34.6863 LOCKED-ROTOR OPERATION Locked-Rotor Torque (N.m):51.8262Locked-Rotor Phase Current (A):53.1066Locked-Rotor Torque Ratio:0.720545Locked-Rotor Current Ratio:4.40514Locked-Rotor Stator Resistanc

19、e (ohm):0.926082Locked-Rotor Stator Leakage Reactance (ohm):2.11318Locked-Rotor Rotor Resistance (ohm):1.07639Locked-Rotor Rotor Leakage Reactance (ohm):5.01715 DETAILED DATA AT RATED OPERATION Stator Slot Leakage Reactance (ohm):0.83535Stator End-Winding Leakage Reactance (ohm):0.523713Stator Diffe

20、rential Leakage Reactance (ohm):0.757046Rotor Slot Leakage Reactance (ohm):2.12948Rotor End-Winding Leakage Reactance (ohm):0.191323Rotor Differential Leakage Reactance (ohm):2.17061Skewing Leakage Reactance (ohm):0.98048DETAILED DATA AT RATED OPERATIONStator Winding Factor:0.959795Stator-Teeth Flux

21、 Density (Tesla):1.39626Rotor-Teeth Flux Density (Tesla):1.26883Stator-Yoke Flux Density (Tesla):1.32576Rotor-Yoke Flux Density (Tesla):1.20521Air-Gap Flux Density (Tesla):0.725873Stator-Teeth Ampere Turns (A.T):10.4835Rotor-Teeth Ampere Turns (A.T):7.73997Stator-Yoke Ampere Turns (A.T):19.3268Rotor

22、-Yoke Ampere Turns (A.T):3.6677Air-Gap Ampere Turns (A.T):365.746DETAILED DATA AT RATED OPERATIONCorrection Factor for Magnetic Circuit Length of Stator Yoke:0.532743Correction Factor for Magnetic Circuit Length of Rotor Yoke:0.45931Saturation Factor for Teeth:1.04983Saturation Factor for Teeth & Yoke:1.1127Induced-Voltage Factor:0.942715DETAILED DATA AT RATED OPERATIONStator Current Density (A/mm2):4.60486Specific Electric Loading (A/mm):23.5663Stator Thermal Load (A2/mm3):108.519Rotor Bar Current Density (A/mm2):3.13337Rotor Ring Current Density (A/mm2):2.02602Half-Tu