() () () .
, , (R << + s), , .
. 1. () () .
(. .1) , :
= + s
(. .1 ):
d = ad + s
q = q + s
(. 1) .
(. 1) 0: I q I d , (0).
U I BD (. 1), I q, :
BD = Iq
, OD, 0 I I q ( 0) I d ( 0 900).
: U I qq I dd, 0, .
SH=m×UH×IH
IH= SH/ m×UH=375×103/3×400=312,5 .
BD= IH× Xd=312,5×1,6=500
U ×cosφ=230×0,9=207; U ×sinφ=230×0,436=100,28
DI= BD + U ×sinφ =500+100,28=600.28
tgψ=600.28/100.28=6
arctg6=80,50
ψ=80,50
cosφ=0,9; arccos0,9=25,840; φ=25,840
ϴ= ψ- φ=80,50-25,840=54,660
OA= U +j× I q×Xq
j× I q×Xq=312.5×cos80,50×0,8=41,26
__________
ǀOAǀ=√2302+41,262=233,672
j× I d×Xd=312.5×sin80,50×1,6=493,14
E0= 233,672+493,14=726,812
2. ψ Θ , Θ 0 1800:
Θ 2 Θ, 2 (. 3), Θ (. 2).
|
|
.
ψmax .
Θmax, ψmax Θ, .
() , (. ).
. :
I = U/d
:
= U/Id = 1/ d*
=1/1,6=0,625
d* - ( ).
d* *.
=1/1,7=0,588
4
:
1.1. .
1.2. R,
.
1.3. η
.
1.4. R,
,
10%.
, ?
1.5. , ,
10%
. ?
1.6. ,
,
,
.
- .
, | I, | R, | R, | kI |
n = 3000 / | ||||
7,5 | 44, 1 | 0,270 | 1,8 |
-
I *, .. | 0, 20 | 0, 40 | 0, 60 | 0, 80 | 1, 00 | 1, 20 | 1, 50 | |
*, .. | 0,05 | 0, 45 | 0, 73 | 0, 88 | 0, 95 | 1, 00 | 1, 03 | 1, 07 |
R - , .
-
-
-
-
1 -
|
|
2 -
RH -
RpEr -
1. () () , .1 , . , , . . :
2= 2ω2=2π n2 2 /60
( 2 = (); 2 = (); n2 = n (/):
= 9,55 / n
= 9,55×7500/3000=23,875 H×
n0 , I = 0, = 0.
, () :
n = (U - I R )/
:
n0 = U/
, :
, :
n0 = n U/(U - I R )
n0 =3000×220/(220-44,1×0,27)=3172 /
:
.
:
I = (U E)/ R
:
E = n
n = 0 Ea = 0, :
Ia = U/ Ra
Ia =220/0,27=814,81 .
, . , Ra .
R, . , n = 0 :
Ia = U/ (Ra + R)
Ia =220/(0,27+2.5)=79,42 .
R . R , :
I = kI I
, :
R = (U/ kI I) - Ra
R=(220/1,8×44.1)- 0,27=2.5
3. 2, 1, .
1 ( ): 2 = ( !).
: 1 = U I. η :
η = / U I
η =7500/220×44.1=0,773
, , , . . , . , , ( ). , (- ) .
, .4 , :
n = (U - I R )/
|
|
:
n = (U - I R ) /
, n n :
n/ n = 1,1
:
n/ n= / = 1,1
:
= 0, 91
I, ( ):
I = 0, 7 I
:
I = U / R
I = U / (R + R)
I =220/180=1.22 .
I = 0, 7×1.22=0,856 .
:
R = (U / I ) - R
R =(220/0,856)- 180=77 .
, , , :
= (/ ) = 0, 91
5. R, U, I ( . 4 ) n = 0,9 n (11):
n = [U I (R + R )] /
n = (U I R ) /
:
n/ n = [U I (R + R )] / (U I R )
, n/ n = 0,9:
U I (R + R ) = 0,9 (U I R )
:
R + R = [U 0,9 (U I R )] / I
R =[220-0,9(220-44,1×0,27)]/ 44,1=0,74 .
, ( = I ) R , .
, , .
n (U < E), :
E = U + I R
E = n
:
n = (U + I R) /
:
= (U I R ) / n
:
n = n (U + I R) / (U I R )
n =3000×(220+44,1×0,27)/(220-44.1×0,27)=3343,32/.