Ngày tải lên :
24/01/2014, 01:47
... (.9,0
1411
2
111
k
kkqt
td
=
07,0.125,1
0062,97280,0.72,0.)925,0.4.( 538 ,1.9,0
2
= 1,045
Trong đó:
k
41
=1 – 0, 033 .
δ
.
1
2
41
t
b
= 1 – 0, 033
07,0. 538 ,1
3, 0
2
= 0,9728
ρ
t1
=0,72 theo bảng 5 .3 trang 137 TKMĐ
σ
1
=0,0062 theo bảng 5.2a trang 134 TKMĐ
SVTH: ... nhôm:
)m/mm(
23
1
2
Al
Ω=ρ
6)
Điện trở vành ngắn mạch r
v
:
)(10. 933 ,0
782 .38
10 .3, 20.
.
23
1
.
10
.
6
2
2
2
Ω===
−
−
−
π
π
ρ
v
v
Alv
SZ
D
r
7) Điện trở rôto r
2
:
2
6
4
2
2
32 9,0
10. 933 ,0.2
10 .31 51,0
.2
−
−
+=
∆
+=
v
td
r
rr
... HÀ
ββ
λ
'.
2
785,0.
3
41
412411
1
k
b
h
b
h
b
b
k
b
h
r
++−+=
Trong đó : β=0, 833
875,0
4
833 ,0 .31
4
31
/
=
+
=
+
=
β
β
k
9125,0875,0.
4
3
4
1
.
4
3
4
1
/
=+=+=
ββ
kk
b’ =...