三相鼠笼式异步电动机的一个设计实例(Y-180L-6_15kW)

1、 电机设计计算实例（三相感应电机）（一）额定数据及主要尺寸1输出功率=15kw=15kw2外施相电压=380V=380V3功电流=13.1579A=13.1579A4效率=0.89=.895功率因数=0.81=0.816极数=6=67定子槽数=54=54转子槽数=44=448定子每极槽数=9=9转子每极槽数=9定转子冲片尺寸见图10极距=107.3377=107.3377mm11定子齿距=11.92641=11.92641mm12转子齿距=14.5727=14.5727mm13节距=8=814转子斜槽宽=11.9264111.92641mm15每槽导体数=34=3416每相串联导体数=306=

2、306式中： =217绕组线规（估算）式中：导线并绕根数·截面积查表 取=11.5=11.5定子电流初步估算值=18.252A=18.252A定子电流密度=5.07=5.0718槽满率（1）槽面积=130.7573mm2=130.7573mm2（2）槽绝缘占面积=21.7133mm（3）槽有效面积=130.7573-21.7133=109.044 mm2=109.044 mm2（4）槽满率=0.7784绝缘厚度=0.35mm=0.35mm导体绝缘后外径=1.58mm=1.58mm槽契厚度=2mm=2mm19铁心长铁心有效长无径向通风道=200+20.45=200.9mm=200.9m

3、m净铁心长无径向通风道 =0.92200=184mm=184mm铁心压装系数=0.92=0.9220绕组系数=0.9560.9848=0.945=0.945（1）分布系数 查表取0.956=0.956式中：=3（2）短距系数=0.9848式中：21每相有效串联导体数=3060.945=289.17=289.17(二)磁路计算22每极磁通式中：=0.935380=355.31=355.31V23齿部截面积（1）定子=6.581691849=10899.28=10899.28（2）转子=8.88118422/3=11983.43 =11983.4324轭部截面积（1）定子=20.66667184=

4、3802.667=3802.667式中：定子轭部磁路计算高度圆底槽:=20.66667（2）转子=30.05184=6449.2=6449.2转子轭部磁路计算高度平底槽=35.05mm25空气隙面积=107.3377200.9=21564.14=21564.1426波幅系数=1.459833 =1.45983327定子齿磁密=1.48264728转子齿磁密=1.348529定子轭磁密=1.455530转子轭磁密=0.85821631空气隙磁密=0.749383132查附录Vl得33齿部磁路计算长度定子圆底槽+=18.5+3.8=19.76667=19.76667转子平底槽=12.5=12.5m

5、m34轭部磁路计算长度定子=70.511=70.511mm转子=27.50235有效气隙长度=0.451.2871.0258=0.594=0.594式中：定、转子卡氏系数、=1.287半闭口槽和半开口槽=1.0258式中：齿距1=11.92644mm 2=14.5727mm槽口宽1=3.5mm 2=1mm36齿部所需安匝定子=18.353221.976667=36.2782=36.2782转子=10.415631.25+25.998441.9=62.41658=62.4165837轭部所需安匝定子=0.361994215.936947.051125=40.64849=40.64849轭部磁路长

6、度校正系数=0.3619942=0.3619942转子=0.72.8065532.7502=5.403=5.403校正系数=0.7=0.738空气隙所需安匝=0.8749.3830.594=356.11=356.1139饱和系数=1.277140总安匝=36.2782+62.41658+356.11+40.67849+5.403=500.886=500.86641满载磁化电流=7.69=7.69A42满载磁化电流标么值=0.58444=0.5844443激磁电抗=1.711=1.71（三）参数计算44线圈平均半匝长（估算）双层线圈=240+261.655363.31式中：=240+220=24

7、0=240mm=61.655=106.866mm式中：d1=20mmd1=20mm45双层线圈端部轴向投影长=61.6550.499=30.765830.7658mm47漏抗系数 =48定子槽单位漏磁导 =0.38420.91667+0.93751.237789 =1.5216=1.5216式中：0.9166670.9166670.93750.93750.38420.384249定子槽漏抗=0.5620=0.5620式中：无径向通风道时=200mm=200mm50定子谐波漏抗 = =0.4945=0.4945式中：51定子端部漏抗=0.2113=0.211352定子漏抗=(0.562+0.49

8、45+0.2113) =1.2678=0.048493=0.04849353转子槽单位漏磁导=0.5+3.341641=3.841641=3.841641式中： 0.50.53.3416413.34164154转子槽漏抗=1.56454=1.5645455=0.6619=0.6619式中： 0.01538856转子端部漏抗=0.098=0.098156mm57转子斜槽漏抗 =0.2216=0.221658转子漏抗 =(1.56454+0.6619+0.098+0.2216) =0.0974=0.097459总漏抗=0.048493+0.0974=0.1459=0.145960定子相电阻61定子

9、相电阻标么值 62有效材料 =1.0536.33154341.76718.9=11.015Kg=11.015Kg =0.920.22902907.80.001 =120.7Kg式中：C=1.05=8.9=1.767=1.767式中：=0.92=0.5mm=0.5mm63转子电阻导条电阻=0.478=0.478端环电阻 =0.06985=0.06985式中： =1.04=1.04转子导条面积=107.7=107.7端环截面积=430=430转子导条或端环的电阻系数=0.0434，=0.0434导条电阻标么值=0.478=0.01655=0.01655端环电阻标么值=0.06985=0.00242

10、=0.00242转子电阻标么值=0.01655+0.00242=0.01897=0.0189764满载电流有功部分=1.11758565满载电抗电流部分=0.19266式中： =1+0.0484930.58444=1.02834=1.0283466满载电流无功部分=0.19266+0.58444=0.7771=0.777167满载电势 =1-(1.1175850.023637+0.77710.048493)=0.9359=0.935968空载电势=1-0.584440.02834 =0.97166=0.9716669空载定子齿磁密=1.03821.482647=1.53928=1.539287

11、0空载转子齿磁密=1.03821.3485 =1.4000=1.400071空载定子轭磁密=1.03821.4555=1.5111=1.511172空载转子轭磁密=1.03820.858216=0.891=0.89173空载气隙磁密=1.0382.7493831=0.778=0.77874空载定子齿安匝=251.976667=49.42=49.4275空载转子齿安匝=12.61.25+38.51.9=88.9=88.976空载定子轭安匝=0.421.27.0511=59.7972=59.797277空载转子轭安匝=0.72.42.7502 =0.76.6=4.62 =4.62 78空载空气隙安

12、匝=0.87780.594=369.7=369.779空载总安匝 =49.42+88.9+59.7972+4.62+369.7=572.4372=572.437280空载磁化电流A81定子电流标么值=1.3612定子电流实际值=1.361213.1579=17.91=17.91A82定子电流密度=5.0676=5.067683线负荷84转子电流标么值=转子电流实际值=294.2=294.2端环电流实际值=85转子电流密度 导条密度=2.73166=2.73166端环密度=1.59698=1.5969886定子铝损耗=1.852860.023637=0.043796=0.0437987.转子铝损

13、耗=0.04379615000=656.85W=656.85w=1.2860.01897=0.0244=0.0244=0.024415000=366W=366w88附加损耗参考实测值取0.01467=0.0146789机械损耗参考实测值取130W=130w机械损耗标么值=0.00867=0.0086790定子铁耗（1） 定子齿体积=610899.2819.76667 =1292655=1292655（2） 定子轭体积=263802.66770.511 =3217567 =3217567（3） 损耗系数（4）定子齿损耗=54.11663=54.11663（5）定子轭损耗=130.0664=130

14、.0664（6）总铁耗 =54.116632.5+130.06642=395.442=395.442w铁耗校正系数=2.5 =2铁耗标么值=0.02636=0.0263691总损耗标么值 =0.00867+0.043796+0.0244+0.01467+0.02636=0.117896=0.11789692输入功率=1.117896=1.11789693 总损耗比=0.1054694效率=1-0.10546=0.89454=0.8945495功率因数=0.82125=0.8212596转差率=0.02298=0.0229897转速= =977r/min=977r/min98最大转矩 =2.84

15、95=2.849599起动电流假定值=2.9552.849513.1579=110.79=110.79100起动时漏磁路饱和引起漏抗变化的系数= =3909.78 对应Kz=0.53=39.9.78 =110.79170.707=2718.714=2718.714=0.64+2.5=0.96578101齿顶漏磁饱和引起定子齿顶宽度的减少=(11.92641-3.5)(1-0.53)=3.96=3.96102齿顶漏磁饱和引起转子齿顶宽度的减少=(14.5727-1)(1-0.53)=6.379=6.379103起动时定子槽单位漏磁导 = 0.916667(0.3842-0.14815)+0.93

16、751.237789=1.3768=1.3768式中：=0.14815104起动时定子槽漏抗 =0.51153Cx=0.51153Cx105起动时定子谐波漏抗=0.530.4945Cx=0.262Cx=0.262Cx106定子起动漏抗=(0.51153+0.262+0.2113)Cx=0.03767=0.03767107考虑到挤流效应的转子导条相对高度=21.2446式中： =31.5mm=1=4.34=4.34108转子挤流效应系数=2.106836=2.106836=0.25=0.25109起动时转子槽单位漏磁导=0.06776+0.83541 =0.90317=0.90317式中： =0.5-0.43224=0.06776=0.06776=0.43224=0.43224=0.253.341641=0.83541=0.83541110起动时转子槽漏抗=111起动时转子谐波漏抗=0.530.6619Cx=0.3508Cx=0.3508Cx112起动时转子斜槽漏抗=0.530