Thiết kế động cơ không đồng bộ một pha điện dung dùng cho quạt.DOC

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 
!"#$ %%$#&'% 
(%)*+++,-!./ 
!)&#0!(1+2
'/3(#./3 
1*%!('4'5&+63 
'%&7 38&9
53%':#0-;8'5
<(+=-;(;5>&?'> 
* ®éng c¬ ®iÖn kh«ng ®ång bé ba pha vµ mét pha
c«ng suÊt nhá5-trÇn kh¸nh hµ1@!-A3
/#1B:1@C&DEED+
F&#5>&G8!;(;( 
1&?G)+H.9-51@;(;I=' 
J#KG%'04'%?#.9 IF9
A (8#L?G)+H.;&)# 
'C)5-& &M!1>&9&#'##N
04'!&##4'(O3>&!)(;G@': 
+F#.-&P5>&QL#
9A!#.8Q*1/81; 
5&*# !)+
81@.9>&:K@& 
=+R+FS6=L*.T#U1@V>&3W
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6F%41!X("LVPL*%?1)1Y%$ 
#9('!5&Z#*+H.(&$; %0
#*;(;3)9(8(/ 
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3+[&&$U1@5-(#1)1Y
81@;(;#8K# &3#
39+[&:K@&-1& 
)*Q:0\L)0+

6F]^DEE_
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mục lục
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85 HL&#%H5'OL hµ;2
NRL$M($$5;2
;NRL(<T#;2

=NRL(#;2
28iRL<Z#;2
@NRL(<T<;@
BNRL(<;@
8iRL<<Z<;@
S8iRL"#HL;@
-QOL ;@
QOL 0<TH;@
9$ RL<:$M($$5;@
;9$ RL<:$M($$57;@
@;B
5 )4HR;B
8#H7&#0"#H#6)#5;B
857L$ "#H;B
;3!7<j4HR;
=9<( 'ER?+R?4"#H;
29$ R?+4"#H#6);
@8i<(R?+4"#H 6#6);
B8i<(H#6)R?+;
3B;S
5 #E;S
8k7&) ;S
Q$ <'6KE;S
;9'0)"#E;S
2
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;NRR?4==
=QO#b*U)i#D('65=2
2QO<'6E=2

@+'O"#'6K5E=2
BQOi#6L=2
3L=2
S8i#=@
-8i#E=@
8i<Z<E=@
8i 'EZ<E=@
;HM 'E=@
=8i#%#=@
28i#%<=@
@8ii#=@
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PHầN iii 53
Vẽ đặc tính làm việc và đặc tính cơ bằng Matlab 53
PHầN iV 59
chuyên đề điều khiển tốc độ động cơ 59
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PHầN I
TổNG QUAN Về CáC PHƯƠNG PHáP NGHIÊN
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β
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PHầN ii
TíNH TOáN THIếT Kế Động cơ không đồng
bộ một pha điện dung dùng cho quạt
Chơng 1
xác định kích thớc chủ yếu và thông số pha
chính
{ 3 6Z0t<#$%&:
HP#F+6* 4$5")<(Z
R[5"6)(6:$5<QF:$5
Q

A'5 "#CD#
1. Tốc độ đồng bộ của động cơ

&n

1500
2
50.60.60
==
p
f
Og
<b_
_N7?n
_807%
2. Đờng kính ngoài stato
8<?)r#67K6:#:)
':$5_
QnBFSH
3. Đờng kính trong stato
Qn$
Q
Q

n-F@@n F\HH]
8<b_
$
Q
_/7$)
$
Q
n\-F=2y-F@2]n=8<<:j& 6#!
$
Q
n-F2

2

4. Bíc cùc stato
'ER_
τ
)(11,36
2.2
46.
.2
.
mm
p
D
===
ππ
≈;@\HH]

5. ChiÒu dµi tÝnh to¸n cña stato
nλQn-F;S=@n\HH]

8<b_
 λ_/7$)FoA'CD#:$5<
λn\-FyF2B]_8Mh
8<5 <Z#!λn-F;Sz
6. ChiÒu dµi khe hë kh«ng khÝ
9`YH'O$Y#ϕF$M($
$5:!F$M($$5A
$ RjHTb&+#Z
[M($$5<H 6:!<
$Y#_

δn-F{-F;\HH]
8#',$)i‡&‡F'b$YT&4HZ6
H5
#!δn-F;HH
7. §êng kÝnh ngoµi lâi s¾t r«to
QˆnQyδn-=@y-F;n=2F=\HH]
8. §êng kÝnh trôc r«to
'

n-F;Qn-F;=@n;F\HH]
3!'

n=\HH]
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W!7<G#

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<
b
K#H+)#F$!#Y*U) H7K##_
u8<Zt5HHMn\]$bICHA'l
HHM$d%&$%&<#
u9$H)%'?H<#
u8i#0<T<#
9. Với những lý do trên ta quyết định chọn số răng nh sau:
Wn=#b

n@z
<

nB
N?Rl#


<
M&Y<#Sh
10. Trong động cơ điện dung, thờng số rãnh của hai pha dới mỗi cực
bằng nhau.
2
2.2.2
16
2
====
pm
Z
qq
s
BA
11. Chọn dây quấn
3!'6KF%H #Ht^
Q6K&"6nn

n@=n=
B
1
2 3 4 5
6
8
7
9

10
11
12
13
14
15 16
B A Y X

12. HÖ sè d©y quÊn stato
924,0
2.4
1.
sin.2
707,0
.4
.
sin.
707,0
===
πνπ
q
q
k
dq
(6_
ν
n{&+"#b&Y
13. Tõ th«ng khe hë kh«ng khÝ
φ
δ

nα
δ
τ>
δ
-
{=
n-F@=;F@F-F2-
{=
nF-B;@-
{=
\p&]
8<b_
α
γ
_/7?LFα
γ
n-F@=
>
δ
{L$M($$5_>
δ
n\-F;{]8F#!>
δ
n-F28z
14. Sè vßng d©y s¬ bé cña cuén chÝnh
52,3620
924,0.10.0736,2.50.11,1.4
220.7,0
4
.

4
===
−
dqAs
Edm
sA
kfk
kU
W
δ
φ
\O]
8<b_
•
H
{ #4HR
$

_7bE&G<T#<
$

nF<47(b&Y
$
m
n
dm
dm
U
E
n\-FB÷-FS]z(6#!$

m
n-FBz
15. Sè thanh dÉn trong r·nh
13,905
2.2
52,3620
.1
.
. ===
qp
W
au
sA
sA
\O]
K6s
#x
nS-2\O]
8<b
#_7H F!#n
85_
3620905.2.2.1
1
===
sAsA
uqp
a
W
\O]



16. Dßng ®iÖn ®Þnh møc
186,0
220.2.38,0
22
.2.cos.
===
dmIIII
dm
dmA
U
P
I
ϕη
\x]
8M6Z0)$)_
η
hh
ϕ
hh
n-F;
17. TiÕt diÖn d©y quÊn chÝnh s¬ bé
)(031,0
6.1
186,0
.
2
mm
Ja
I

S
dm
sA
===
8<b_
h
'H
{QO#4HR
#_7H F#n
„{H+'O„n\@÷F2]x…HH

F(6#!„n@x…HH


8#K6s
x
n-F-;=HH


Q >Z#!'6HM4Π∋8>
Q?#EEhh<‚hƒ#!j_
{ 9:$5s"#'6'P$ 'n-F-HHz
{ 9:$5s"#'6'P$`Y '

n-F;HH
18. Bíc r¨ng stato.
)(03,9
16
46
mm

Z
D
t
s
s
===
ππ
19. Bíc r¨ng r«to
)(39,8
17
4,45.'.
mm
Z
D
t
r
r
===
ππ
S


chơng 2
xác định kích thớc răng rãnh stato
1. Chọn loại thép
8#!U $53A'6 U-F2HHb
7Ut$

n-FSB
2. Xác định dạng rãnh stato

N#"#'b`', '<G#_
{ /K"#Z
{ /X#KYZ
{ /#
W '<G6A<<T|A7YA#<G
aGKYZb$'+YFL<(( 6<G
<G$#+6YjRL0)<Z<T
aGX#KYZb'5'<GKYZ
Q5<G'#5$UH
'<GX#KYZ
3. Với căn cứ nh vậy ta chọn rãnh hình nửa quả lê

-
'
&=
=
<

&

4. ChiÒu cao miÖng r·nh
8M‚hƒA#H<G
=
n\-F2÷-F]HH8#!

=
n-FHH
5. ChiÒu réng miÖng r·nh
&
=

n'
'
u\F{F2]\HH]n-Fu\FyF2]\HH]
8<b_
'
'
':$5'6'P$`Y "#'6K#
8#6&
=
nF2HH
6. KÕt cÊu c¸ch ®iÖn r·nh
Q,6 b&A'6n-F2HH
7. ChiÒu réng r¨ng stato ( S¬ bé)
9j* 4M$)FR*U)_
• 9&A"#<Tz
•  "#$'+z&A"#$z
• 9YH&YH+LK#<TJH<HUF
:>
e
≤8
&
e
)(32,3
97,0.4,1
03,9.5,0
.
.
mm
kB
tB

czs
s
===
δ
8<b_
3!H+L<T#>
e
nF=\8]
/7Ut$

n-FSB
8. ChiÒu cao g«ng stato.
3A#6&4)&(H+LU<Z_


)(312,5
2
16
.32,3.2,0.2,0 mm
p
Zs
b
zs
===
3!

n2F;\HH]
9. §êng kÝnh phÝa trªn stato
97<GX#KYZ_



( )
( )
)(49,7
16
16.32,38,0.246.
2.
4
1
mm
Z
ZbhD
d
s
szss
s
=
−
−+
=
−
−+
=
π
π
π
π
3!'

nBF2\HH]

10. ChiÒu réng r·nh díi stato
&

( )
( )
)(1,1032,3
24
3,5.279.
.2.
mmb
Z
hD
zs
s
gsn
=−
−
=−
−
=
π
π
11. ChiÒu cao r·nh stato.
97<GX#KYZ_

)(2,11
2
3,5.24679
2
.2

mm
hDD
h
gsn
rs
=
−−
=
−−
=
12. ChiÒu cao phÇn th¼ng cña r·nh.


n
<
y-F2\'

u
=
]n
nFy-F2\BF2u-F]n@F@2\HH]
13. Sau khi chän kÝch thíc r·nh th× kÝch thíc thùc cña g«ng stato lµ:

)(3,5
2
2,11.24679
2
.2
mm
hDD

h
rsn
gs
=
−−
=
−−
=

&n-
n@@2
<n
=n-
&=n2
'nB2

14. B×nh qu©n bÒ réng r¨ng stato:
&ˆ
e

( )
( )
)(3134,35,7
16
8,0.25,746.
.2.
1
1
mmd
Z

hdD
s
s
rss
=−
++
=−
++
=
π
π
&ˆˆ
e
n
( )
( )
)(3235,31,10
16
3,5.279.
.2.
2
mmb
Z
hD
s
gsn
=−
−
=−
−

π
π
>K_
&
e
n
)(32,3
2
3235,33134,3
2
zs'b' zsb'
mm=
+
=
+
15. DiÖn tÝch r·nh stato
( )
)(6,801,105,7.65,6.5,0
8
5,7.
).(.5,0
8
.
2
2
2112
2
1
mm
bdh

d
S
ss
s
rs
=++=
=++=
π
π
16. KiÓm tra hÖ sè lÊp ®Çy
65,0
1,74
23,0.905
2
2
.
===
r
cdrA
ld
S
du
k
8<b_
 Q5 <G 
N
'
n\'

u

<
]n-F2\-FuF]n@F2\HH

]
 Q5<Gb5
N
<
nN
<
yN
'
nN
<
y\'

u
<
]n
n-F@y@F2nB=F\HH

]
;

Chơng 3
Xác định kích thớc răng rãnh rôto
1. Rãnh rô to có dạng tròn, quả lê.
8:<GH$5`YH&Y&A"#$'+
gH
8MK#`HA)$'+<G<OY
)'#'P<b`$"Qb:!<GKYZF

'6A<<TjAMA#"#<G
2. Chọn rãnh hình quả lê
3. Chiều cao miệng rãnh.
97F`YH&Y&A"#$'+F
A#H<G6$Y

=<
n\-F;ữ-F=]HH
8#!
=<
n-F=HH
4. Chiều rộng miệng rãnh
&
=<
n\ữF2]HH
3!&
=<
nHH
=
=<
&=<
'<
'<
<

5. Làm rãnh nghiêng ở rôto và chọn thanh dẫn bằng nhôm nhằm làm
giảm tiếng ồn và mômen ký sinh.
6. Hệ số dây quấn rôto
9974,0
795,0

2
795,0
sin.2
2
sin.2
=






=






==
n
n
ndqr
kk


8<b_

n

_b(H<GZ

)(328,047,0.
18
.2.2
.
2
radian
Z
p
n
r
n
===






_9Z<G&`4&J7"#&<T#

076,1
39,8
03,9
====
r
s
r
n

n
t
t
t
b

&

{Z"#<G~M<O"#<Z
@O<O~#H&<G#&

n

nSF-;\HH]
7. Dòng điện tác dụng trong thanh dẫn rôto
)(27,138
974,0.17
924,0.3620.2.2.186.0.92,0
.
2
A
kZ
kWmIk
I
dqrr
dqAsAdmI
td
===
8#bK#$
h

n\]Fn-FSF<#-2h#b
$
h
n-FS
8. Bề rộng răng rôto
&
e<
)(3,3
97,0.3,1
39,8.5,0
.
.
mm
kB
tB
czr
r
===

2
n
bn
bnnnnnnnnbnn
d
53.4509187553.45091875