三相鼠笼式异步电动机的一个设计实例(Y-180L-6 - 15kW)(3)

68．空载电势

69．空载定子齿磁密

70．空载转子齿磁密

71．空载定子轭磁密

72．空载转子轭磁密

73．空载气隙磁密

74．空载定子齿安匝 75．空载转子齿安匝

76．空载定子轭安匝

77．空载转子轭安匝

78．空载空气隙安匝 79．空载总安匝

80．空载磁化电流

81．定子电流标么值

定子电流实际值

1??0?1?im?x1=1-0.58444?0.02834

=0.97166

B1??00T10?1??B=.97166T1 L0.9359=1.0382?1.482647=1.53928

BT20?1??01??BT2 L=1.0382?1.3485 =1.4000

B1??0C10?1??BC1=1.0382?1.4555=1.5111 LB??0C20?11??BC2=1.0382?0.858216=0.891 LB1??0g0?1??Bg=1.0382?.7493831=0.778 LAT?T10?atT10?hT1=25?1.976667=49.42 AT?T20?atT20?hT2

=12.6?1.25+38.5?1.9=88.9

ATC10?C1?atC10?lC1?

=0.4?21.2?7.0511=59.7972

ATC20?C2?atC20?lC2?=0.7?2.4?2.7502

=0.7?6.6=4.62

ATg0?0.8ge?Bg0=0.8?778?0.594=369.7 AT0?ATT10?ATT20?ATC10?ATC20?ATg0

=49.42+88.9+59.7972+4.62+369.7 =572.4372

I22ATm0?2.0?p2.22?572m?.4372?61?Z?1Kdp13?306?0.945

?8.789i1?iP2?iR2?0.77712?1.1175852 ?1.3612I1?i1?Ikw=1.3612?13.1579=17.91

1??0=0.97166

BT10=1.53928

BT20=1.4000

BC10=1.5111

BC20=0.891

Bg0=0.778

ATT10=49.42 ATT20=88.9

ATC10=59.7972

ATC20=4.62

ATg0=369.7

AT0=572.4372

Im0?8.789A

i1=1.3612

I1=17.91A

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82．定子电流密度

??I17.9111a=?1.767=5.0676 1?N1?S12?183．线负荷

A1?I11?m1?Z???D?3?306?17.91?i13.14159?20525.529

84．转子电流标么值

i2?iP2?ix2=0.192662?1.1175852?1.13406 转子电流实际值

I2?im1?Z?1?Kdp12?IKWQ

2?1.13406?13.1579?3?306?0.94544=294.2

端环电流实际值

IQ2R?I2??p?294.2?443.14159?6?686.7835

85．转子电流密度 导条密度 ?I2294B?S?.2107.7=2.73166 B端环密度

?IR686R?S=.7=1.59698 R43086．定子铝损耗 p2Al1?i1?r1=1.85286?0.023637=0.043796 87.转子铝损耗

PAl1?pAl1?P2?103=0.043796?15000

=656.85W

． pAl2?i22?r2=1.286?0.01897=0.0244

PAl2?pAl2?P2?103=0.0244?15000=366W

88．附加损耗

PS?PSP3参考实测值取0.01467

2?1089．机械损耗 P5.5???6?2???3

?D2?fw?p10?参考实测值取130W

????机械损耗标么值

PPfw?fwP3=

1302?1015000=0.00867

90．定子铁耗

（1） 定子齿体积

V?T1?p?ST1?hT1=6?10899.28?19.76667

=1292655

（2） 定子轭体积

V?C1?2p?SC1?hC1=2?6?3802.667?70.511

?1=5.0676 A1?25.529

i2?1.13406

I2=294.2

IR=686.7835

?B=2.73166

?R=1.59698

pAl1=0.04379

PAl1=656.85w

pAl2=0.0244

PAl2=366w

PS=0.01467

Pfw=130w

Pfw=0.00867

VT1=1292655

VC1=3217567

11

（3） 损耗系数 （4）定子齿损耗 （5）定子轭损耗 （6）总铁耗

铁耗校正系数 铁耗标么值

91．总损耗标么值

92．输入功率 93． 总损耗比

94．效率 95．功率因数

96．转差率

97．转速

98．最大转矩

99．起动电流假定值

=3217567

pT1pC1

PT1?pT1?VT1=54.11663

PT1=54.11663 PC1?pC1?VC1=130.0664

PC1=130.0664

PFe?k1?PT1?k2?PC1 PFe=395.442w

=54.11663?2.5+130.0664?2 =395.442

k1=2.5 k2=2

PFe?PFe395.442PFe=0.02636

P2?103=15000=0.02636 ?P?PAl1?PAl2?PFe?PS?Pfw

?P=0.117896

=0.00867+0.043796+0.0244+0.01467+0.02636 =0.117896

P1?1??P=1.117896

P1=1.117896

?p??P0.117896?p?0.10546

P=1.117896=0.10546

1??1??p=1-0.10546=0.89454

?=0.89454

cos??11cos?=0.82125

i=3612?0.89454=0.82125

1??1.Sn?1?PAl2?PFe??PAl2Sn=0.02298

PT1?PC1??P?S?Pfw=0.0

0.02441?0.0244?0.02636?0.00867?0.01467?0.00361?0.0086712298

120f?1?Sn?120?n=977r/min

n?50?(1?0.02289)p=6

=977r/min

T1?0.02298M?1?Sn?2??22?2?0.023637?0.1478? TM=2.8495

?r1?r1?x??=2.8495

I?st?(2.5~3.5)TM?IKW I?st=110.79

12

=2.955?2.8495?13.1579=110.79

100．起动时漏磁路饱和引起漏抗变化的系数

BL?AT?st?1.6g??C=

2718.714

1.6?0.45?0.96578BL=39.9.78

=3909.78 对应Kz=0.53

AT?st???Q??Z2Ist1?0.707?KU1??Kd1??Kp1?1?1??0a1Q2??=110.79

AT?st?=2718.714

?17

?0.707

???0.91557?0.9562?0.9848?54?44??0.97166

=2718.714

?gC?0.64?2.5t

1?t2=0.64+2.50.4511.92641?14.5727

=0.96578

101．齿顶漏磁饱和引起CS1??t1?b01??1?KZ?

定子齿顶宽度的减少

=(11.92641-3.5)(1-0.53) =3.96

102．齿顶漏磁饱和引起CS2??t2?b02??1?KZ?

转子齿顶宽度的减少

=(14.5727-1)(1-0.53) =6.379

103．起动时定子槽单位?S1?st??KU1??U1???U1??KL1??L1 =

漏磁导

0.916667(0.3842-0.14815)+0.9375?1.237789 =1.3768

式中：

??U1=0.14815 104．起动时定子槽漏抗

xS1?st???S1?st??xS1?1.3768?0.21496 S11.5126 =0.51153Cx

105．起动时定子谐波漏xd1?st??K?xd1=0.53?0.4945Cx=0.262Cx

抗

Z106．定子起动漏抗

x1?st??xS1?st??xd1?st??xe1

CS1=3.96

CS2=6.379

?S1?st?=1.3768

xS1?st?

=0.51153Cx

xd1?st?

=0.262Cx

x1?st?=0.03767

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=(0.51153+0.262+0.2113)Cx =0.03767

107．考虑到挤流效应的转子导条相对高度

??0.1987hbB?fBbR??B?0.1987?31.5?504.34 ?21.2446式中：hB

hB=31.5mm

bB bBbRb=1 R?B

?B=4.34

108．转子挤流效应系数

r~r=2.106836 0

x~x=0.25 0109．起动时转子槽单位?S2?st???U2?st???L2?st?=0.06776+0.83541

漏磁导

=0.90317

式中： ?U2?st???U2???U2=0.5-0.43224

=0.06776

??U2=0.43224

?x~L2?st??x??L2=0.25?3.341641=0.83541 0110．起动时转子槽漏抗

xS2??st??S2?st??xS2?2.73268.841641?0.05984S23 ?1.11284Cx111．起动时转子谐波漏xd2?st??K抗

Z?xd2=0.53?0.6619Cx

=0.3508Cx

112．起动时转子斜槽漏xSK?st? …… 此处隐藏：2932字，全部文档内容请下载后查看。喜欢就下载吧 ……