電機(jī)CAD技術(shù)：ch2 基于Ansoft RMxprt的三相異步電機(jī)設(shè)計(jì)分析

1、第2講 基于Ansoft RMxprt的三相異步電機(jī)設(shè)計(jì)分析電機(jī)的磁路設(shè)計(jì)法RMxprtTM是旋轉(zhuǎn)電機(jī)專業(yè)設(shè)計(jì)軟件，能快速計(jì)算各種電機(jī)（感應(yīng)電機(jī)、同步電機(jī)、電子或機(jī)械換向電機(jī)等）的性能指標(biāo)。RMxprtTM還能快速地對(duì)成百上千種設(shè)計(jì)方案進(jìn)行評(píng)估，并可對(duì)預(yù)選方案進(jìn)行設(shè)計(jì)優(yōu)化，優(yōu)化設(shè)計(jì)后的方案可根據(jù)模型的對(duì)稱性，自動(dòng)生成合理的二維/三維電磁場(chǎng)有限元分析模型。RMxprtTM為工程人員在產(chǎn)品設(shè)計(jì)過程中及時(shí)地評(píng)估和平衡設(shè)計(jì)方案提供了有效工具。RMxprtTMRMxprt概述隨著電機(jī)應(yīng)用領(lǐng)域的不斷拓展，工程設(shè)計(jì)人員在產(chǎn)品小型化、高效率以及高性能方面面臨越來越多的挑戰(zhàn)。RMxprtTM幫助電機(jī)制造者，在設(shè)

2、計(jì)過程的初始階段制定成百上千種方案，同時(shí)對(duì)其性能進(jìn)行評(píng)估，從中優(yōu)選出最佳、合理的設(shè)計(jì)方案。RMxprt概述具有Windows風(fēng)格的桌面環(huán)境，采用專業(yè)的、模版化電機(jī)設(shè)計(jì)界面，RMxprtTM運(yùn)用經(jīng)典電機(jī)分析理論快速、準(zhǔn)確地求解電機(jī)的轉(zhuǎn)矩轉(zhuǎn)速特性、損耗、氣隙磁通、以及效率等重要特性曲線及參數(shù)。集成的參數(shù)化分析和優(yōu)化設(shè)計(jì)功能使它成為快捷、高效的電機(jī)設(shè)計(jì)專用工具。RMxprt概述 RMxprtTM與Ansoft的Maxwell集成在同一設(shè)計(jì)環(huán)境中，設(shè)計(jì)者可單獨(dú)使用RMxprtTM，也可將其優(yōu)選出的設(shè)計(jì)方案自動(dòng)生成二維/三維有限元分析模型，用Maxwell對(duì)電機(jī)進(jìn)行更精確的電磁場(chǎng)分析設(shè)計(jì), 實(shí)現(xiàn)電機(jī)解析

3、-有限元自動(dòng)設(shè)計(jì)流程。特點(diǎn)-Windows風(fēng)格介面，模版化參數(shù)輸入: 工作條件,幾何尺寸, 材料特性等 -基于經(jīng)典的電機(jī)分析理論和等效磁路法的快速解析分析 -提供美國、中國材料庫和公制、英制單位 -自動(dòng)排列多種繞組型式或用戶自定義任意繞組連接方式 -無刷電機(jī)、開關(guān)磁阻電機(jī)和永磁同步電動(dòng)機(jī)的驅(qū)動(dòng)線路類型、控制方式及開關(guān)管參數(shù)可設(shè)定 -直流電機(jī)詳細(xì)的換向器和電刷參數(shù)可設(shè)定 -輸入數(shù)據(jù)自動(dòng)驗(yàn)證功能特點(diǎn)-提供豐富的預(yù)設(shè)計(jì)電機(jī)模型庫-自動(dòng)設(shè)計(jì)功能: 槽形尺寸、線圈匝數(shù)、線規(guī)、起動(dòng)電容等 -求解時(shí)考慮材料非線性特性、三維斜槽和端部效應(yīng) -參數(shù)化和優(yōu)化設(shè)計(jì)功能：-尺寸等參數(shù)無需指定，可用一定變化范圍的變量表

4、示 -數(shù)據(jù)、圖形、自定義結(jié)果輸出模式 -多種負(fù)載種類三相異步電機(jī)RMxprt設(shè)計(jì)（1）項(xiàng)目建立三相異步電機(jī)RMxprt設(shè)計(jì)（2）模型建立或雙擊項(xiàng)目管理樹對(duì)應(yīng)項(xiàng)，在屏幕上彈出“Properties”窗口，輸入模型數(shù)據(jù)后，點(diǎn)擊“確定”退出。定子數(shù)據(jù)輸入Relative Permeability:相對(duì)磁導(dǎo)率simple: 導(dǎo)磁性能各向同性且BH關(guān)系為線性；Value值為1Anisotropic : 導(dǎo)磁性能各向異性材料 需要輸入三個(gè)方向的導(dǎo)磁性能 X:T(1,1) Y:T(2,2) Z:T(3,3)Nonlinear: 導(dǎo)磁性能非線性Bulk Conductivity:電導(dǎo)率 類型： Simple:

5、各向同性 Anisotropic :各向異性Magnetic Coercivity:磁矯頑力 Core Loss Type: 鐵芯損耗類型 Electrical Steel:電工鋼片 Power Ferrite:功率鐵氧體 定子槽形定子繞組定子繞組端部數(shù)據(jù)和絕緣數(shù)據(jù)定子繞組類型轉(zhuǎn)子數(shù)據(jù)轉(zhuǎn)子槽類型轉(zhuǎn)子槽形數(shù)據(jù)轉(zhuǎn)子鑄鋁繞組軸材料設(shè)定(磁性、非磁性)仿真設(shè)置求解異步電機(jī)結(jié)果查看設(shè)計(jì)單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