Ansoft EM专题讨论（二）——三相异步电机设计
本帖最后由 hypo_qu 于 2009-2-23 08:10 编辑现以一个80机座的三相感应电机为例，用Maxwell+RMxprt做一个三相感应电机启动的仿真。为了让广大初学者看得更明白，我将步骤做的详细一点。
参数：380V/50Hz P2＝1100W n=2850
η＝79% cosφ＝0.79
定子参数：外径128 内径：65 槽形见图1：
转子参数：外径64.2 内径：20.5 槽形见图2：
本帖最后由 hypo_qu 于 2009-2-23 08:12 编辑
先用RM做路算
本帖最后由 hypo_qu 于 2009-2-23 08:03 编辑
性能曲线
本帖最后由 hypo_qu 于 2009-1-10 12:40 编辑
以上就完成了RM的路算。对了还有一个路算的计算单，在2D分析中是要用的。
计算单：
Three-Phase Induction Motor Design
File: Setup1.res
GENERAL DATA
Given Output Power (kW): 1.1
Rated Voltage (V): 380
Winding Connection: Wye
Number of Poles: 2
Given Speed (rpm): 2850
Frequency (Hz): 50
Stray Loss (W): 22
Frictional Loss (W): 15
Wind Loss (W): 15
Type of Load: Constant Power
Operating Temperature (C): 75
STATOR DATA
Number of Stator Slots: 24
Outer Diameter of Stator (mm): 128
Inner Diameter of Stator (mm): 65
Type of Stator Slot: 2
Dimension of Stator Slot
hs0_stator (mm): 0.7
hs1_stator (mm): 0.7
hs2_stator (mm): 8.8
bs0_stator (mm): 2.5
bs1_stator (mm): 4.6
bs2_stator (mm): 7
Top Tooth Width (mm): 4.28275
Bottom Tooth Width (mm): 4.20055
Number of lamination sectors 0
Press board thickness (mm): 0
Magnetic press board No
Number of Conductors per Slot: 70
Number of Parallel Branches: 1
Number of Wires per Conductor: 2
Type of Coils: 11
Coil Pitch: 0
Wire Diameter (mm): 0.53
Wire Wrap Thickness (mm): 0.04
Slot Insulation Thickness (mm): 0.2
Top Free Space in Slot (%): 0
Bottom Free Space in Slot (%): 0
Conductor Length Adjustment (mm): 0
End Length Correction Factor 1
Limited Slot Fill Factor (%): 75
ROTOR DATA
Number of Rotor Slots: 28
Air Gap (mm): 0.4
Inner Diameter of Rotor (mm): 20.5
Type of Rotor Slot: 1
Dimension of Rotor Slot
hr0_top (mm): 0.2
hr01_top (mm):0.2
hr2_top (mm): 7
br0_top (mm): 0
br1_top (mm): 3.2
br2_top (mm): 1.62
Cast Rotor: Yes
Half Slot: No
Skew Width: 1.78
End Length of Bar (mm): 0
Height of End Ring (mm): 8
Width of End Ring (mm): 10
Resistivity of Rotor Bar
at 75 Centigrade (ohm.mm^2/m): 0.0263158
Resistivity of Rotor Ring
at 75 Centigrade (ohm.mm^2/m): 0.0263158
MATERIAL CONSUMPTION
Armature Copper Density (kg/m^3): 8900
Rotor Bar Material Density (kg/m^3): 2689
Rotor Ring Material Density (kg/m^3): 2689
Armature Core Steel Density (kg/m^3): 7872
Rotor Core Steel Density (kg/m^3): 7872
Armature Copper Weight (kg): 1.26815
Rotor Bar Material Weight (kg): 0.132043
Rotor Ring Material Weight (kg): 0.0754214
Armature Core Steel Weight (kg): 4.64333
Rotor Core Steel Weight (kg): 1.37199
Total Net Weight (kg): 7.49093
Armature Core Steel Consumption (kg): 8.2817
Rotor Core Steel Consumption (kg): 1.98525
RATED-LOAD OPERATION
Stator Resistance (ohm): 5.29389
Stator Leakage Reactance (ohm): 4.12046
Rotor Resistance (ohm): 5.64127
Rotor Leakage Reactance (ohm): 7.09699
Resistance Corresponding to
Iron-Core Loss (ohm): 1.54988e+008
Magnetizing Reactance (ohm): 170.223
Stator Phase Current (A): 2.36588
Current Corresponding to
Iron-Core Loss (A): 1.31334e-006
Magnetizing Current (A): 1.1958
Rotor Phase Current (A): 1.9613
Copper Loss of Stator Winding (W): 88.896
Copper Loss of Rotor Winding (W): 65.1009
Iron-Core Loss (W): 0.000802
Frictional and Wind Loss (W): 29.7178
Stray Loss (W): 22
Total Loss (W): 205.716
Input Power (kW): 1.30578
Output Power (kW): 1.10006
Mechanical Shaft Torque (N.m): 3.70337
Efficiency (%): 84.2457
Power Factor: 0.824426
Rated Slip: 0.0544833
Rated Shaft Speed (rpm): 2836.55
NO-LOAD OPERATION
No-Load Stator Resistance (ohm): 5.29389
No-Load Stator Leakage Reactance (ohm): 4.12296
No-Load Rotor Resistance (ohm): 5.64115
No-Load Rotor Leakage Reactance (ohm): 17.8122
No-Load Stator Phase Current (A): 1.25755
No-Load Iron-Core Loss (W): 0.000885155
No-Load Input Power (W): 80.2731
No-Load Power Factor: 0.0704044
No-Load Slip: 0.00136341
No-Load Shaft Speed (rpm): 2995.91
BREAK-DOWN OPERATION
Break-Down Slip: 0.7
Break-Down Torque (N.m): 15.4642
Break-Down Torque Ratio: 4.1757
Break-Down Phase Current (A): 14.4801
LOCKED-ROTOR OPERATION
Locked-Rotor Torque (N.m): 14.8493
Locked-Rotor Phase Current (A): 16.8985
Locked-Rotor Torque Ratio: 4.00966
Locked-Rotor Current Ratio: 7.14257
Locked-Rotor Stator Resistance (ohm): 5.29389
Locked-Rotor Stator
Leakage Reactance (ohm): 3.85183
Locked-Rotor Rotor Resistance (ohm): 5.68395
Locked-Rotor Rotor
Leakage Reactance (ohm): 3.30024
DETAILED DATA AT RATED OPERATION
Stator Slot Leakage Reactance (ohm): 1.60744
Stator End-Winding Leakage
Reactance (ohm): 1.68295
Stator Differential Leakage
Reactance (ohm): 0.830077
Rotor Slot Leakage Reactance (ohm): 4.75769
Rotor End-Winding Leakage
Reactance (ohm): 0.414714
Rotor Differential Leakage
Reactance (ohm): 0.788756
Skewing Leakage Reactance (ohm): 1.13703
Slot Fill Factor (%): 72.5187
Stator Winding Factor: 0.957662
Stator-Teeth Flux Density (Tesla): 1.35773
Rotor-Teeth Flux Density (Tesla): 1.36448
Stator-Yoke Flux Density (Tesla): 1.20139
Rotor-Yoke Flux Density (Tesla): 1.82146
Air-Gap Flux Density (Tesla): 0.63459
Stator-Teeth Ampere Turns (A.T): 20.4966
Rotor-Teeth Ampere Turns (A.T): 17.5194
Stator-Yoke Ampere Turns (A.T): 75.8166
Rotor-Yoke Ampere Turns (A.T): 56.2517
Air-Gap Ampere Turns (A.T): 254.498
Correction Factor for Magnetic
Circuit Length of Stator Yoke: 0.695559
Correction Factor for Magnetic
Circuit Length of Rotor Yoke: 0.165046
Saturation Factor for Teeth: 1.14938
Saturation Factor for Teeth & Yoke: 1.66831
Induced-Voltage Factor: 0.927797
Stator Current Density (A/mm^2): 5.36193
Specific Electric Loading (A/mm): 19.4643
Stator Thermal Load (A^2/mm^3): 104.366
Rotor Bar Current Density (A/mm^2): 5.1408
Rotor Ring Current Density (A/mm^2): 6.29082
Half-Turn Length of
Stator Winding (mm): 192.22
WINDING ARRANGEMENT
The 3-phase, 1-layer winding can be arranged in 24 slots as below:
AAAAZZZZBBBBXXXXCCCCYYYY
Average coil pitch is: 10
Angle per slot (elec. degrees): 15
Phase-A axis (elec. degrees): 112.5
First slot center (elec. degrees): 0
TRANSIENT FEA INPUT DATA
For one phase of the Stator Winding:
Number of Turns: 280
Parallel Branches: 1
Terminal Resistance (ohm): 5.29389
End Leakage Inductance (H): 0.005357
For Rotor End Ring Between Two Bars of One Side:
Equivalent Ring Resistance (ohm): 2.05946e-006
Equivalent Ring Inductance (H): 2.51741e-009
2D Equivalent Value:
Equivalent Model Depth (mm): 80
Equivalent Stator Stacking Factor: 0.95
Equivalent Rotor Stacking Factor: 0.95
Estimated Rotor Inertial Moment (kg m^2): 0.0010407
上面红色部分在2D中是要用到的参数。 本帖最后由 hypo_qu 于 2009-2-23 08:04 编辑
RM输出
本帖最后由 hypo_qu 于 2009-2-23 08:04 编辑
开始用MAXWELL 2D来分析
本帖最后由 hypo_qu 于 2009-2-23 08:09 编辑
绕组分组
本帖最后由 hypo_qu 于 2009-2-23 08:15 编辑
设置材料
本帖最后由 hypo_qu 于 2009-2-23 08:20 编辑
设置边界和激励源
本帖最后由 hypo_qu 于 2009-2-23 08:21 编辑
设置铁芯损耗参数
本帖最后由 hypo_qu 于 2009-2-23 08:22 编辑
设置求解条件
本帖最后由 hypo_qu 于 2009-2-23 08:23 编辑
设置动态分析有关选项
本帖最后由 hypo_qu 于 2009-2-23 08:24 编辑
分析
本帖最后由 hypo_qu 于 2009-2-23 08:27 编辑
在Maxwell 2D主窗口中，点击下拉菜单Post Process/Transient Data，弹出PlotData窗口和 Open 小窗口。在Open窗口中双击某项特性数据文件，PlotData窗口中绘出该特性的动态过程曲线图
下面是这个实例的性能的动态曲线
本帖最后由 hypo_qu 于 2009-2-23 08:29 编辑
MAXWELL 3D的建模(欣赏一下),完毕。
本帖最后由 hypo_qu 于 2009-1-10 13:27 编辑
附件为以上整理的文件（PDF格式） 支持！写得很详细，是用11版吧，最好有个计算结果和实际结果比较，以及差异产生原因更好 本帖最后由 hypo_qu 于 2009-5-21 17:03 编辑
结果对比
上科所计算的结果
三相异步电动机设计主要数据
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定子槽数=24. 定子外径=128.00 转子外径= 64.20
转子槽数=28. 定子内径= 65.00 转子内径= 20.50电压=220.0跨距= 104.85
铁心长=80.00 铁心有效长=80.80 并联路数= 1.
线圈伸出长=37.27
定子净铁心长=76.00转子净铁心长=76.00 每相串联导体数= 560.0
定子槽口宽= 2.50 转子槽口宽= 1.00 每槽导体数= 70.
定子槽宽=4.60 转子槽宽= 3.20 绕组层数= 1.
定子槽底半径= 3.50 转子槽宽= 1.62 定子线规1: 2.*.5300
定子槽斜边高=.70 转子槽宽=.00 定子线规2: 0.*.0000
定子槽高= 8.80 转子槽宽=.00 导线面积:.44
定子槽口高=.70 转子槽口高= .20 节距 :10.00(________)
定子齿宽= 4.21 转子槽高1= 1.60
定子绕组伸出铁心直线部分长:10.00
线圈半匝长=220.58
转子上齿宽= 3.37 转子槽高2= 8.60 铜重: 1.53(kg) B25=15400.00
转子下齿宽=.00 转子槽高3=.00 铝重: .22(kg) P10=2.12
定子齿距= 8.51 转子齿距= 7.20 铁重: 9.71(kg) B50=16400.00
定子槽肩斜角度数(角度)= 33.70 定子电阻= 6.0749 P15=5.10
转子槽肩斜角度数(角度)= .00 转子电阻= 8.1963 定子电密=5.51
定子轭部磁路计算最小的高度= 17.80转子导条电密= 4.7799端环电密= 7.0397
转子轭部磁路计算最小的高度= 17.47斜槽度: 1.78 槽绝缘厚度: .20
导线漆膜厚度:.04 .00
定子轭高=18.97 转子轭高= 17.74 定子槽有效面积: 59.64
气隙长度= .40 转子槽形代号= 3. 槽满率:.7101 槽楔厚度:1.50
定子齿下部宽= 4.28 定子齿上部宽= 4.18 转子上齿下部磁密= .00
转子下齿下部磁密=14843.66
定子轭最大磁密=12404.2 转子轭最大磁密=12636.1
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面积 磁 密 磁路长度 单位安匝数 安匝数
定子齿: 3840.4 13364. 10.7 9.98 10.64
定子轭: 1441.5 11641. 85.6 5.91 35.42
转子齿: 3581.5 14329. 10.5 14.34 15.02
.0 0. .0 .00
转子轭: 1348.5 12444. 19.3 7.48 5.01
气隙: 8249.8 6221. .50 249.48
总匝数： 315.57
有功电流= 1.6667 损耗（标么值） 损耗（实际值）
磁化电流= .8709 铜耗: .0978 107.5801
空载电流= .9977 铝耗: .1028 113.0716
铁耗: .0310 34.0956
定子轭部磁路校正系数=.700 杂散耗: .0200 22.0000
转子轭部磁路校正系数=.347 机械耗: .0200 22.0000
电抗电流系数=1.0238 总损耗: .2716 298.7473
输入标么值： 1.2716
电流标么值 电流实际值
定子电流 1.4578 2.4296
转子电流 1.2866 123.2167
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磁 密 Cm**3 W/cm^3 损耗
空载定子齿:14350.7 81.9 .036 2.99
空载定子轭:12501.0 493.8 .027 13.32
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效率 功率因数最大起动转矩倍数 起动转矩倍数 起动电流倍数
计算值: .7864 .8723 2.74 2.66 4.68
设计值: .7500 .7500 2.50 2.00 6.00
热负荷= 1100.6410 转差率= .0887 材料成本= 116.50
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型号 :80B 频率 : 50.极数: 2. 绝缘等级 :( 允许温升80k )
功率 :1.10 (kw) 绕组接法: 1-- 矽钢片牌号 :DR510
计算 :_____________日期 :2009- 5-21 校核 :_____________日期 :___________
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本帖最后由 hypo_qu 于 2009-1-10 14:11 编辑
实测
非常精彩的帖子，相信对新手有很好的指导意义