发布时间 : 星期日 文章三相感应电机设计_题目+实例更新完毕开始阅读fd503d9758f5f61fb636660e
63.有效材料
定子导线重量
?1?? GW?ClCNs1Z1Nt1Ac=1.05×0.314×32×36×1.0936×10-6×8.9×103 =7.393 kg
式中C为考虑导线绝缘和引线重量的系数,漆包圆铜线取1.05
??为导线密度 硅钢片重量
? GFe =Kfelt(Dl??)2?Fe=0.95×0.163×(0.22+0.005)2×7.8×10-3 =61.897 kg
式中?为冲剪余量,取5×10-3m 64.转子电阻
导条电阻折算值 RB′=
?KBLB4m1(N1Kdp1)2ABZ2
0.0434?10?6?1.04?0.195?4?3?(192?0.9598)2=
96.45?10?6?32=1.162?
式中KB是叠片不整齐造成导条电阻增加的系数 端环电阻折算值
?DRZ2m1(N1Kdp1)2RR=
2?p2ARZ2′
0.0434?10?6?32?0.132?4?3?(192?0.9598)2= ?62?3.14?4?250?10?32=0.03716? 导条电阻标幺值
?RBIkw1.16?6.58RB= ==0.02012
UN?380*
21
端环电阻标幺值 RR*=
?IKW0.3716?6.58RR==0.00643
UN?380转子电阻标么值 R2* =RB* +RR*=0.02655
(四) 工作性能计算
65. 满载时定子电流有功分量标么值
?1.1236 I1p*=1??1?0.8966. 满载时转子电流无功分量标么值
Ix*=?1X?* I1p*2[1+(?1X?* I1p*)2]
=1.0216×0.13944×(1.1236)2×[1+(1.0216×0.1394×1.1236)2] =0.181
?1 =1+
X?1Xms* =1?0.0491=1.0216
2.53667.满载时定子电流无功分量标么值
I1Q* =Im*+ Ix*=0.469+0.143=0.65 68 满载电势标么值
KE=1-?L
=1-(I1p*R1 *+ I1Q* X?1*)
=1-(1.1236×0.0207+0.65×0.0491) =0.942
与22项初设值KE相符 69. 空载时电势标么值
1-?0=1-Im* X?1*=1-0.309×0.0419 =0.976 70. 空载时定子齿磁密 Bt10=(1??0)Bt1=(0.976)?1.58=1.637T
0.9421??L71. 空载时转子齿磁密
22
1??00.976)Bt2?()?1.60=1.658T Bt20=(1??L0.94272 空载时定子轭磁密
1??00.976)Bj1?()?1.45=1.502T Bj10=(1??L0.94273. 空载时转子轭磁密
Bj20=(1??00.976)Bj2?()?1.242=1.287T 1??L0.94274. 空载时气隙磁密
1??00.976B?0=()B??()?0.722=0.748T
1??L0.94275. 空载时定子齿部磁压降
Ft10 =Ht10Lt1=46.8×102×15.97×10-3=74.74A 76. 空载时转子齿部磁压降
Ft20=Ht20Lt2=53.4×102×23×10-3=122.82A 77. 空载时定子轭部磁压降
Fj10=Cj1Hj10Lj1=0.40 ×20.1×102×78.81×10-3=63.36A 78. 空载时转子轭部磁压降
Fj20=Cj2Hj20Lj2=0.43 ×8.90×102×27.69×10-3=10.597A 79. 空气隙磁压降
F?0?K??B?0?01.025?0.748?0.4?10?3=244.05A ?0.4??10?680. 空载总磁压降
F00?Ft10?Ft20?Fj10?Fj20?F?0
=74.74+122.82+63.36+10.597+244.05 =504.97A
81. 空载磁化电流
Im0?2pF00
0.9?m1N1Kdp1 23
=
2?2?504.97
0.9?3?192?0.9598=4.06A
(四)工作性能计算
82. 定子电流标么值
I1=(I*21p?I*21Q)=(1.12362?0.652)=1.249
*定子电流实际值
6.58=8.51A I1?I1Ikw?1.249×83. 定子电流密度 J1=
I18.51??3.89Amm2 ?11?1.0936a1Nt1Ac*84. 线负荷
A1=
m1N?1I1?Di1?3?320?8.51?22132Am
3.14?0.14185. 转子电流标么值
I2* =(I*21p?I*2X) =
(1.12362?0.18432)
=1.139 转子电流实际值 I2 =I2Ikw*m1N?1Kdp1Z2
=1.139?6.58?=258.96A 端环电流实际值
IR=
3?384?0.9598
32I2Z2258.96?32??659.4A 2?p2?3.14?286. 转子电流密度
导条电密
24