单相电容起动异步电动机的设计毕 业 设 计222

单相电容启动异步电动机设计

=5.512×2.51×7.5×2.014/30 =6.964 14. 转子斜槽漏抗

Xsk?Kx2.51?L2?sk Q2 =5.512×2.51×7.5×1.592/30 =5.508 15. 转子子漏抗

X2M?Xs2?Xd2?Xsk

=17.704+6.694+5.508=30.176

16. 总电阻 RTm?R1m?R2m=25.722+23.876=49.598 17. 总漏抗 XTm?X1m?X2m=11.824+30.176=42

22?RTm18. 总阻抗 ZTmXTm=61.262

19. 定子主绕组漏阻抗

2 Z1mX12m?RTm=28.309

5.5磁路计算

1. 压降系数

I1'?Z1m ?1?=4.238×28.309/220=0.557

U1I1'?R1m?1?U1=4.238×11.824/220=0.228

'?1?tg?1XMTM?tg?111.824=13.409 25.722?'?cos?1(cos?')?cos?10.64?50.208

KE?1??1?2?1?cos(?'??1)

2 =1?0.5572?2?0.228?cos（ 50.508-13.409） =0.873

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单相电容启动异步电动机设计

'KE?1??1?2?1?cos?'

'2' =1?0.2282-2?0.228?0.64 =0.972

2. 漏磁系数

'KE0.873 Kp???0.901

KE0.9723.设齿饱和系数FT'?1.10 计算极弧系数?i'?0.658 波形系数 KB?1.10

'KE?U1?106504.每级磁通 ???

KE?Zm?Kdpmf10.872?220?106?50 ==131623

1.10?1648?0.915?505. 气隙磁密 Bi??131623??4413

?i???L10.658?6.0445?7.5t11.007?4413?9119

KFe?bT1?KP0.95?0.524?0.95t20.801?4113?7426

KFe?bT20.95?0.5016. 定子齿磁密BT1?Bi7. 转子齿磁密BT2?Bi8.定子轭磁密

Bc1??2KFe?L1?hc1?Kp?131623?9211

2?0.95?7.5?0.923?0.8729. 转子轭磁密Bc1??2KFe?L2?hc1?131623?4274

2?0.95?7.5?2.16110.查附表9-3得 atT1?3.713 atc1?2.250 得c1?0.53 atT2?3.198 atc2?1.435 得c2?0.635 11.气隙所需安匝

ATs?0.8?Bs?Kc???0.8?4413?1.2635?0.025?111.517

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单相电容启动异步电动机设计

12.齿部所需安匝

定子 ATT1?atT1?hT1?3.2558?1.2?4.504 转子 ATT2?atT2?hr2?2.2504?0.964?2.169

13.轭部所需安匝

定子 ATc1?c1?atc1?hc1?0.595?3.198?4.176?7.945 转子 ATc2?c2?atc2?hc2?0.645?1.435?1.172?1.085 14.齿饱和系数FT?ATT1?ATT2?ATs

ATs=1.089

15.总磁势安匝AT?ATT1?ATT2?ATs?ATc1?ATc2 =126.851 16.满载磁化电流Ium?p?AT4?126.851??0.426

0.9?Zm?Kdpm0.9?1648?0.80417.激磁电流Xum?KE?U10.972?220??501.972 IUM0.4265.6铁耗和机械风摩耗的计算

1. 定子齿重 GT1?7.8Q1?bT1?hT1?L1?KFe?10?3

=7.8×24×0.524×1.2×7.5×0.95×10?3

=0.839

2. 定子轭重 Gc1?7.8?(D1?hc1)?hc1?L1?KFe?10?3

=7.8×3.14（12.8-1.15）×0.964×7.5×0.95×10?3

=2.338

3. 转子齿重 GT2?7.8Q1?bT2?hT2?L2?KFe?10?3

=7.8×30×0.501×0.964×7.5×0.95×10?3

=0.805

4. 转子轭重 Gc2?7.8?(D1?hc2)?hc2?L2?KFe?10?3

=7.8×3.14（2.2+2.161）×2.161×7.5×0.95×10?3

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单相电容启动异步电动机设计

=1.645

5. 单位铁耗 pT1?2.084 pc1?1.301

pT2?1.838 pc2?0.521 6. 总铁耗 pFe?pFe1?pFe2=18.663+11.023=29.686 定子铁耗 pFe1?2pT1?GT1?1.7pc1?Gc1

=10.801

转子铁耗 pFe2?2pT2?GT2?2.5pc2?Gc2

=5.281

D67机械耗pfw?k2()2?(1)4??6.039

p105.7副绕组计算

1. 绕组形式：正弦绕组

跨槽 百分比

平均跨槽：ym =

2 26.8 4 46.4 6 26.8 ?y/n=4

1n2. 绕组系数：Kdpa =0.804 3. 选取有效匝比a=1.6 4. 总串联导线数初值：Za'?aZm?KdpmKdpm?1.6?1648?0.915?2637

0.9155. 每极串联匝数：Wpa =（aa?Za’)/2p=(1×2637)/2×4=330 6. 总串联导线数: Za=（2p?Wpa）/aa =(2×4×330)/1 =2640

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