Tài liệu Đề tài: Thiết kế nguồn cung cấp điện cho động cơ một chiều kích từ độc lập docx
















Ths 
 














 






Thiristor (SCR)
chúng 
     


.
.
.
I.
Circuti Maker
 chúng 



 Nguyễn Khánh Hưng 


 








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. 5
1.1 5
1.2  7
1.3 7
1.4 8
. 9
2.1 10
2.2  11
2.3 12
 Tính t. 13
3.1 T 13
3.2 17
3.3. 17
3.4 19
I. 19
4.1. 20
4.2. 22
4.3. 23

  . 31





























5



 I



c khác.
 o
h 

 n

 
1.1
 
(stato) to)
1.1.1
 
a)

 

 .
 


các  
nhau.
b).
ính và dù
Lõi thépng 

lông.
c).
 .

dùdùng 







6



d).
-    

 
 
-  
h


 r

1.1.rôto.
:
a)
 
lic 


Trong  

 



  
rô to.
b)


 t



 
c)
 




7



r
 

d)
- 




- 

1.2 

c tính c 


-


 (1.2)
: =









 (1.3)


-




,

- Khi g


- 



1.3 S.









8














(Hình 1.1 )











 


= 

+ 





  mômen do
n sinh ra ln ( M ) rôto b


 

















1.4 
:  =

K
U
u
-
2
)(

K
RR
fu

M (1.4)

Φ, R
ư
, U.
1.4.1 
R
f

 R
f =
0 là
R
f





1.4.thông





9




M = K.Φ.


E

= K.Φ.ω 

i
k

=
kb
k
rr
e

+ 
k
dt
d

(1.5)


r
k
 .
r
b
 .

k
 .
            
à


 =
u
R

K
2
)(


.
1.4.3  


Ta t
 









 







10



2.1 
- Các va(

, 

) và (

, 

).
- Góc m van, góc dn các van 
0  : 

, 

d
  

,



, 

khóa.



 :


=











=








=






= 1,23




=






= 1,1


 




 









11



2.2 
- 


- 


- 

+ : 


   


 


    

 


p.







=






cos= 1,17

cos


=







=






= 1,35




=






= 0,58 


 












12




2.3 
- 





.



- 


= 

cos =






cos


= 

=







=






=






= 1,05




= 0,816


  


  



hình tia.






13





= 600 (V), 

= 220 (A)  


= 

.

= 600.220 = 132000 (W) = 132 (kW)










 


3.1 


= 600V
-DC) : 

= 220 A




= 220 (V)
Ta có 

= 

+ 2

+ 

+ 

(3.1)



= 600 (V)




= 1 (V)





= 6%  

= 0,06   = 36 (V)
 

= 600 + 2  + 0 + 36 = 638 (V)


=






(1+cos)
Vi  = 


 

= 





= 2


= 309 (V)


= 309 (V)



=



 

=



  = 180 (A)







14





= 








 

=


  = 253 (A)




 
S = 

 

= 





= 1,05   = 139000 (W) (3.2)
=139 (KVA)
-
Vì  
+  :


= 






(3.3)





= 6

f : 



= 6 




= 138 









= 183 

= a
 (cm) ,b = 17 (cm)


+  :
 (mm)
  (mm) = 28 (cm)

+ Tính toán dây 
+  

, (

)


=





(3.4)
        

       


= 1,5
50.



=






=


= 0,24  







15



  là 

= 



= 220.0,24 = 53 (vòng)
  là 

= 



= 309.0,24 = 74 (vòng)

 :


=

=2  


)
+ 







=


= 128 




.

= 4.16.2 



 

= 4,5.16,5.2 

)



=




=


=90 




.

= 4.11.2 


 

= 4,5.11,5.2 


)
+ 
W =






(3.5)


gô


 








=


.0,95 = 15 (vòng)




=




=


= 3,5 ()



 3.14 = 13 vòng


= 0,1 (mm)
 


= ( 

+ 

).

= (4,5 + 0,1).4 = 18,4 (mm)




gô














16





=


 0,95 = 23 (vòng)



=





=


= 3,2 ()


 
- 3.19 = 17 vòng


= 0,1 (mm)
 


= ( 

+ 

).

= (4,5 + 0,1).4 = 18,4 (mm)
+ 

C= 1,5a = 15.110 = 165 (mm)
3.a + 2.c = 3.110 + 2.165 = 660 (mm)

gô

:


= b = 170 (mm)


= a = 110 (mm)


= 

.

= 11,5.17,5 = 201,5

)

H = h + 2.a = 28 + 2.11,0 = 50 (cm)
3.2 
a)n.
 

 
Ta có 

=



=


.309 = 757 (V)



= 

.




 

= 1,3  

= 1,4


= 1,4.757 = 1000V
 .







=



= 73,33 (A)






17





= K.

= 1,4.73,33 = 102,66 (A)
Van  

= 25%




= 

 = 102,66.4 = 410,65 (A)


410.65 (A)

 : SCR LS431050
b).
* .
 : 

 :


= 1,1.

= 1,1.253 = 278,3 (A)



= 2,5.

= 2,5.253 = 632,3 (A)



= 1,5.

= 1,5.253 = 379,5 (A)
 

 
+ N





+ Nguyên nhân bên ngoài :     

        -C, m -    

- 

.
- 
k =




(3.5)
-ian :



, 


, 


,






)






18



C = 





,







  









, C=0,25)
3.3  
- 


= 5%

= 0,05.600.220 = 6600 (VA)
- 


= 





= 6



= 48,74 ( 

)





= 6






= 1,21,4
Do 

= 

.

= 48 



= 6 (cm), 

=8 (cm)
- 

= 2,5

= 2,5.6 = 15 (cm)
- n 


= 

= 2.6 =12 (cm)
- 
L = 2

+ 

= 2.12 + 2.6 = 36 (cm)
- 
H= h+a = 15+6 = 21 (cm)
3.4 
n 
Vì : 


=



=

 = 757 (V)
 


= 





= 0,816.

= 0,816.220 = 180 (A)
 

= 


MBA
 
(











19








 
H ng b : Trong h u khin m, van  

 

H ng b : Trong h này  


ín.


4.1 .
4.1.1 












- .
2  .

3  .
4  Khâu khuyếại xung .
5  






1
DF
2
TX
3

4



5







20











(Hình 
Trong - .
2  

.
3  so sánh.
4  .
5 

.
4.1.2 .

a).

h 
 




) i cu khin ca
y góc  






b) 











và 

 này


. Theo

c)
- u khin các van lu khin  
.


1



2

4
SS+TX
3



5





21



- 

+ 



- 



- 

 



- 

- 
- 
-  
 
 
- 


               
 



trì 




4.2 



















22



4.2.1



và 







 Ic


 
Ic

.










4.3 u 
4.3.1 .





(Hình 4.4 


 


Uv
0
Ur
R2
1K
-VCC
D1
0
R1
1K
+
-
U1A
741
3
1
84
2
T1
1 5
6
4 8
Uv
VCC
VCC
D2 R3
10K


23





 0 thì 



 0 thì 









do 



.



 

thì 

 (E  2) V


 

thì 

  (E  2) V



c.Tính toán.
Vì f = 50hz  T =


= 0,02s = 20ms

t = 

+ 

= 0,01s







 

thì :






 
Trong 

= 0,001s = 0,1ms, 

= 0,009s = 9ms




sao cho :


= 

(





) = 15sin(2f




) = 2,35V


= 2,35V
- 

:


=








 

=









4.3.2 
a)


Ur
0
-VCC
D4
9,1V
VCC
D3
4007
R4
4.7K
VCC
R5
100K
C1
0.22uF
+
-
U2A
741
3
1

8 4
2
Uv





24




(Hình 4.5 Khâu tạệưa)
-
+Khi 

 thì 



âm 

 nên


= 

( 


- 

)  

(

 .









vì
 



= 

=







dt =








dt =







t






 



+Khi 


 thì D3 khóa, 


=0  di qua R5 


 


= 

= 

-







dt = 


-


.




t
b)Tính toán
chn C = 0,22


có 





theo :


= 




-





=0 

=










=







100K
Trong thòi gian 


có :





25

(







-



).



 


 


 
4.3.3 Khâu so sánh


(Hình 4.6 Khâu so sánh)
OA2.

  


Tính toán

4.3.5Khâu phát xung chùm


Uv
Ur
VCC
+
-
U4A
741
3
1
8 4
2
R15
1K
Udk
-VCC
0
R11
4.7K
-VCC
R14
1K
VCC
+
-

U5A
741
3
1
8 4
2
R12
4.7K
C3
104
Ur
R13
4.7K