giao trinh khi cu dien 0013 4004
TRANSCRIPT
O NGUYN KHNH [email protected]
Mn C s Kh c in
Gio trnh : Kh c in
1.1 :Bi M u
* Kh c in l cc thit b in dng ng ,ct , bo v , iu khin, n nh cc mch in (o lng) in p ,cng sut (theo chc nng ).- iu khin: Tin cy ,chn lc,t ng lp li.
- ng ct l chc nng quan trng ,khng dng in (an ton ) ,nhn thy khong cch (dao cch ly) .
+Ngn mch rt kh khn khi ct dng ,dng cu ch , my ct ,aptmt (h p).
+ Qu ti c thi gian(r le nhit).
-iu khin : cc thit b cng tc lm vic vi cc ch khc nhau . Kh c in theo in p : - Kh c in cao p Umc >1000V
- Kh c in h p Umc 400 kV)
* Kh c in dng dng : +Kh c in mt chiu
+ Kh c in xoay chiu Kh c in nguyn l lm vic : + in c
+ in t
+ in nhit Chng I : Nam chm in .
1.1: i cng nam chm in .1,S :
1-mch t tnh ;2-cun dy;3-mch t ng( np);
4-l xo nh; 5-c chn 0 t thng ;
:t thng lm vic ;r :t thng r; :khe h lm vic ; nh ngha : Nam chm in l mt c cu in t bin in t c (lc ,m men).
ng K xut hin I trong cun dy vng . :sc t ng [Avng ] F sinh ra t thng : + lc in t ht np (khng ph thuc chiu i) m
+ r
- : [ H/m ] c trng cho dn in.
H/m (chn khng , khng kh ) tuyt i. dn t tng i
Mt t thng
;S : tit din cc t; B [ Wb/m2 ] , [ T ] . Cng t trng : [ T/H/m ] , [ A/m ], [Tm/H ].
T tr : [ H-1 ] T dn : [ H ]
I _tuyn tnh;
III _bo ho ;
II _phi tuyn tnh ton phc tp.
* Phn loi :
- Nam chm in ni tip :cun dy ni tip vi ph ti dng in ph thuc ph ti .- Nam chm in song song :cun dy song song vi ph ti .
- Nam chm in xoay chi u ( AC )
Nam chm in mt chiu ( DC ).
2,Cc nh lut c bn:2.1, nh lut m :
2.2, nh lut Kirchoff 1 :
2.3, nh lut Kirchoff 2 :
2.4, Dng in ton phn :
3, ng dng: s dng rng ri trong cc c cu truyn ng , cng tc t ,, thit b bo v ngn mch trong my cch in ,dng trong iu khin ,cc c cu phn ly , phn loi c cu in t chp hnh ( phanh hm in t ).4, Tnh ton nam chm in :
- Mch t phi tuyn tuyn tnh ho .
-Kh xc nh chnh xc t tr ca mch t : ch ng cho tuyn tnh u.
1.2 : T dn mch t.* Phn st t :ph thuc im lm vic trn th B(H)
Vd:
nu im lm vic thuc vng tuyn tnh = const , b qua t tr st t .
* Phn khng kh :
- khe h khng kh lam vic + T dn r.- Cng thc chung :
khng kh khng ph thuc vo im lm vic B(H) .
- coi trng in t l trng song phng (u)
iu kin : d - ng knh n hnh tr 1, Phn chia t trng :
Chia t trng thnh cc vng n gin
Tnh dn cc trng thnh phn
Tng hp li* Vi hnh hp ch nht :
-1/2 tr c :
- tr rng : ( m=1:2 )
- cu c :
- cu rng :
EMBED Equation.3 t dn tn H s t tn :
Khi nh ;a,b ln
cng ln
Kt qu tng i chnh xc nhng phc tp dng tnh ton kim ngim.
2, Tnh bng cng thc thc nghim ( kinh nghim ):
Bng ( 1-3)
3, Tnh bng hnh v :
Khi cc t khc tp khng dng 2 loi trn th v bc tranh t trng
+ng sc t
dn
+ng ng th
1.3 : Mch t mt chiu .
- # .
U, I khng ph thuc vo t Mch khng tn hao do xoy , t tr
- Hai bi ton :
+ Thun : Cho tnh F
+Ngc : Cho F tnh Kh khn : +T dn kh tnh chnh xc .
+Phi tuyn vt liu t .
+Thng s ri tp trung.
1,Mch t 1 chiu b qua t thng r :
-Khi
EMBED Equation.3 .
- Mch t hh xuyn .
A, Thun :
bit tm
mch t thay th :
Mch t mt chiu I=const F= const khng ph thuc vo
UFe bo ha .
b, Ngc : bit F
tnh c
Phng php d trn c s bi ton thun : c th dng hnh kt qu trng hp c bit .
Ly OA= IW/ltb ; T A dng ;
EMBED Equation.3 .
2,Mch t 1 chiu c xt ti t thng r :
a, B qua t tr st t :
Khi nghim nm trong vng tuyn tnh ca B( H )
EMBED Equation.3
Mch t thay th :
Gr =kgrl
gr : dn sut t d ; k Fcn nam chm in chuyn ng
max min
L0 L1
k o
a = 4 , AC = 24.
;
Trong :
m : khi lng phn ng my in
v = dx/dt
Dng phng php chia nh ((i) thnh (( ( i24.Thi gian chuyn ng khi nh t4u = 0 ,
II.c tnh ng NC xoay chiu (SGK)
Chng 2 : S pht nng ca kh c in
1.i cng
-Thit b hng do + in p cao ( nh thng cch in ( chm chp ,ngn mch
+ Nhit dng in gy nn ( nng cch in ( gi ha , chy
-Vt liu cch in chu nhit ( cp cch in
-Dng tn hao nng lng trong dy dn :
( = I2R
Trong : R = : in tr 1 chiu ca dy dn c lp
Rv = KmR : Km l hiu ng mt ngoi ln tn hao dy dn
-Tn hao trong vt liu dn t (thp) khng ti
(f,B,(xoy) ( (( W/leg) ( f,B,vt liu
-Tn hao trong cht in mi :
( = 2(fU2tg(
Trong : tg( l gc tn hao in mi .
2.Cc phng php trao i nhit
Co 3 phng php l dn nhit , di lu v bc x
-Dn nhit : do tip xc rn rn m :
EMBED Equation.3 Trong : +d2Q truyn qua dS trong dt theo hng x
+ ( l h s dn nhit
+ ( l nhit
- i lu
- Bc x
3.Cc ch lm vic ca kh c in
Bt u lm vic phng trnh cn bng nng lng :
Trong : l tn hao l tn hao to ra mi trng
l tn hao lam nng
l nhit dung thit b l cng sut
ST l din tch to nhit
KT l h s to nhit
vi l hng s thi gian nhit
+ Qu trnh pht nng
+ Qu trnh ngui :
EMBED Equation.3
EMBED Equation.3
Xc nh T: V tip tuyn t O ct ti A ,OB = T.
+ ngha T ( vt l): l khong thi gian pht nng cn thit thit b t xc lp nhit khng c to nhit ra mi trng :
nu KT = 0
t = T
+ Cc ch lm vic ph thuc t,
1.Ch lm vic di hn :
Tlv ln
iu kin : tlv > (45) T , , C/h
: nhit cho php .
ti Idm di hn ch di hn khng cho php qu ti
2. Ch lm vic ngn hn
- tlv b
- tngh ln
+ t = tlv ( P = P1(
( cha tc dng ht ln truyn nhit thit b tlv ( ( P = P1(
+ P2 > P1 ( t = tlv ( cho php ( ( h s qu ti theo cng sut
3.Ch ngn hn lpli
tlv b (
Sau nchu k ( ch n nh gi quanh ()
Chu k 1:
Chu k 2:
EMBED Equation.3 cho php qu ti
2.4 S pht nng ca thit b in ch ngn mch
tlv rt b
( on nhit ( khng c ta nhit
((I) rt ln
(
EMBED Equation.3 ch ngn hn
D bn nhit thit b in : l kh nng ca thit b chu dc dng ngn mch trong thi gian cho php:
Khi ngn mch i khng chu k ( quy i inm sang In( chu k )
2.5 Cc phng php xc nh nhit
1.o bng nhit k thy ngn
-Khng d c nhit im
-Khng truyn c tn hiu i xa ,d v
( ng dng nhit k cng tc thy ngn ( o khng ch nhit
2. o bng in tr
trong (T l h s nhit in tr
Thng qua R(,R0,(T ( (o Rngui, Rnng ta dng V- A cu o
Dng sensor in tr ,mch cu
Rx in tr chun kim loi bn dn
3.o bng cp nhit in (nhit ngu)
o nhit im
Qun tnh nhit b
C th truyn i xa
(max cao
Khng cn co ngun m vn c ch th
4.o bng bc x hng ngoi
Chng 3: Lc in ng kh c in
3.1 i cng v lc in ng
Lc in ng chnh l lc tc dng ca in trng v t trng
Trong 1 mch vng c s tc ng ca lc in ng lm bin dng mch vng
ch x lp ( Im khng ln ( b ( ngn mch ( Inm >> Im (F tng ln lm cho thit b nhanh hng hn
+ Cc phng php tnh lc in ng
1.nh lut Bio-xava-Laplace
- on mch dl1(m),i1(A) dt trong t trng(T) c:
vi
Mi trng ( = const th
I2(A) l dng in trong on mch dl2(m), r l khong cch dl1 vi dl2,
(N)
EMBED Equation.3 : gi l h s kt cu
EMBED Equation.3 (N) ( xc nh hng ca F ta dung quy tac bn tay tri
Nu co 2 mch vng i1,i2 ta c phng trnh cn bng nng lng:
EMBED Equation.3
: l bin i t cm
: l bin i v tr
-Nu cho 1 mch vng:
(N)
-Nu cho 2 mch vng:
iu kin bit c biu thc gii tch ca L, M theo x
Lc in ng ( h (l1,l2 ) bn vng nht ( nng lng ln nht .
Cc trng hp thng gp :
3.2 Tnh ton lc in ng cc trng hp thng gp
1.Lc in ng cc thanh dn song song
d : ng knh dy dn Phn h quang ( h quang tng
+ Qu trnh ion ha < Phn h quang ( h quang gim( h quan s tt ( ng dng dp tt h quang 3.2 H quang in 1 chiu
Mun dp tt h quang in 1 chiu tc l lm cho n khng chy n nh ( UR,UL khng ct nhau.
Ti c nh ( UR c nh ( Uhq tng ( khng ct Ur( tng Uhq th tng chiu di ng h quang
3.3 H quang in xoay chiu
1.H quang in xoay chiu
2.Phc hi bn in ,in p
Ti R :
i ( 0 m u0( 0 ( d dp h quang
i ( 0 m u0( umax ( kh dp h quang
i ( 0 m uc= umax,3umax ( kh dp h quang nht .
(V vy khi chn thit b cn xem xet h s d tr
Uphc hi > Uchc thng( h quang chy li do ngun v in tch ti
+ nh hng thun tr
Uo , I hq trng pha
I0 = 0 ( U0 = 0 ( Phn ion rt mnh ( d dp h quang
+ nh hng ti cm (L)
Uo , I hq lch pha nhau gc (/2 vi vy :
EMBED Equation.3 ( to iu kin thun li cho ion ha v nng lng tch tr nn kh dp h quang
+ nh hng ti dung (C)
Uo , I hq lch pha nhau gc (/2 vi vy : ( kh dp tt h quang hn
(ti R ( chn
Ti L th K=1.5
Ti C th K=2
3.4 Cc bin php dp h quang
dp tt h quang thi cn lm cho : qu trnh phn ion > qu trnh ion
Chnh l lm cho thi gian phong h quang gim th phn ion mnh
1.Ko di h quang
a. Ko di bng c kh ( tng khong cch gia 2 tip im (im cc)( tng chiu di dao cch li ( tng kch thc
Tuy nhin nu tng na th hiu qu khng tng. Unh thng vao khong 3000V/mm
b. Bt h quang i vo khe ziczc: dng t trng thi h quang vo khe zic zc dng trong cng t in ( h quang in c xu hng i ln
c.Thi h quang bng t: lc in ng i v Fe( dn dp v ko di h quang ta nhit ( dng trong kh c in
d.Thi h quang bng kh nng
- khng kh kh sch nn vi p sut cao 20 at trong bnh ng dn n vng in cc ( thi im m ( van m thi mnh ( thi c lp (khng ph thuc I ct)
-Nhc im l cng knh
- H thng kh nn b xung ( ng ct nu khng nn
2.H quang chy trong mi trng c bit
a.Du bin p
-Cch in tt
-Do h quang ( du phn tch
-Nhc im : lng du gim v ha hi v bn (thng kim tra lc sch b xung (dng trong thit b in ng ct cao p
My ct du ( h quang cch in
b.Dp h quang bng vt liu t sinh kh
-dng vt liu nh thy tinh hu c ( nhit cao ( ha hi ( c bn cch in cao ( vi cu ch cao p ( thi h quang .Lc ct khng ln ,thit b r tin ( thng dng
c.Dp h quang in trong chn khng (cch in l tng)
-Kh nng ion ha bng 0 ( nhit h quang b (kch thc b ( khng cn bo dng
-Cng ngh bung ct
-SF6(elegas) l kh cch in l tng ,chu c h quang ,dn nhit tt ,ng c nhit cao ,nn SF6 trong bung dp ,p sut vi at
-Nhc im : bn d r r kh
Nu p sut thp nn dp h quang km (kha khng cho thao tc )( My ct cao p ( Siu cao p
3.Phn loi h quang
Chia nh h quang ( in p cao ( dng thng dng my ct hnh T ni tip ( thao tc ng thi
4.Dng ct ng b (cho dng ()
-Khi i = 0(thc hin ng ct c.Thao tc 3 pha m chi 1 pha bng 0 (thao tc tng pha
- Ct ngn mch ( i > 0 ( khng c li
Chng 5 : Tip xc in
5.1 Khi nim chung v tip xc in
-nh ngha :
-Phn loi : + Tip xc c nh
+ Tip xc trt
+ Tip xc ct Loi tip xc : + Tip xc im (cu-cu)
+ Tip xc ng(tr-tr)
+ Tip xc mt (phng-phng)
5.2 in tr tip xc
Din tch tip xc Stx< S ( dng in tht li ch tip xc( Rtx tng( tn hao tng
V l thuyt trong F l lc nn tip xc
Stx tng th F tng v ( gim (vt liu mm)
5.3 Cc ch lm vic ca tip im
1.Cc thng s ca tip im:
Im , Um,I ng, Ict Nin: s ln ng ct
m: m (mm) khong cch gia tip im nh v ng (khng phng in lin quan dn dp h quang
vi (di hn )2.Cc ch ct (xc lp)
- L ch khoong c dng in i qua tip im ( I = 0
-m ln ( khng phng in
( chng li bi bn ,xi ha cho tip im(IP- Cp bo v)
3.Ch ng (xc lp )
- I = Im, Rtx = Rtx cui (Ftx cui)
-Rtx cui nh ( (utx,( tx phi b
- Khi ang ng to ra Inm( lc in ng khng ln lm
(cn hn dnh tip im
+tng Ftx( khng c li v tn cng c hc v thit b ln
+Gim xu hng nh hng F
4.Qu trnh ng
-Khi c tn hiu ng ( tip im chuyn ng pha tip im tnh
m gim ( E tng ( F ln ( Phng in (tia la,h quang b)
khi m = 0 ht h quang ( Ftx=Ftxd R tx cui ( tip im mn Thi gian rung tr
- gim rung :
+gim mng( lm gim thi gian rung
+ gim vn tc (c gii hn) + tng Ftxd (tng cng l xo)
+dng vt liu mm
-Id=I0 (dng khng ti b)( khng c hin tng g
( Ptx ln( hm c tnh tip im
5.Qu trnh ct
Rtxc ( Rtxd ( ln)
t > 0 ( 2 tip im ri nhau( h quang (nng chyar b mt( bc hikim loi theo h quang( tip im b mn ch yu do h quang khi ct (mn in):
Ict =I0 ( mn t
Ict =It ( mn va
Ict =Inm ( mn ln
( mn ph thuc vo dng in ct
5.4 Vt liu tip im
Yu cu : dn in tt ,t0nc cao , Rtx tt , t b n mn ha hc ,t n mn (chu, h quang),sau pht ha ,d gia cng,r
ng : Rtx ln (xi ha,t mn ,cng,chu h quang)sau pht ha,d gia cng ,r(kh lp oxi ha b mt ( kh i trong qu trnh tip xc c trt trn nhau hoc ng
Ch : Khi tnh nhit U=Umax=1.1 Um
U=Umin cho php
-Bc t b oxi ha ,km chu h quang( tip im lm vic vi Im-Nhm : oxit bn vng ( khng lm tip im
-Vnfram: nhit nng chy cao (dng cho tip im h quang
-Kim loi gm : hn hp bt kim loi ,p p sut cao to cc tnh cht vt l thch hp
5.5 Kt cu tip im
+ Kiu cng sn :
dng cho
1 pha c 1 ch ct
Khng c bung dp h quang
Nam chm in ht chp( lc in t ln
Lc tc dng ln tip im l lc n hi thanh dn
Dng cho rle,Utip im max = 250 V
+ Kiu cu
Trng thi ng
1 pha 2 ch ct ( d ct h quang
Truyn dng tnh tin
Khng c dy dn mm
Ch tip xc u , tip xc cui l nh nhau ( b mt d b r do h quang
1 pha c 2 ch tip xc ( Ftx ln (c cu truyn ng phi khe
( Cng tc t n 1000 V
+ Kiu ngn
- Tip xc cc ng
1 pha c 1 ch ct v tip xc cui khc ng ( u tip xc trc lm vic , tip xc sau( h quang pht sinh vng lm vic ( lm sch tip im
i ln hng trm ,ngn ampe( my ct h p
+ Kiu dao
cu dao,dao cch li lin kt ngm ,tip xc mt ( lm sch phn lm vic v n t b h quang
ng ct khng ti (ng b)(Ilv ln (h p(cao p
+ Kiu i
ng
Nu : + rng ( mt ct khng kh nn
+ c ( mt ct chn khng
( X l h quang quay( gim cc im nng cc b Tnh
+ Kiu hoa hu
Tr c
i Tip im ng
Gi l xo
L xo tip im
Tip im tnh
Dy dn
mm i
Tip xc ng
Phn tip xc ban u v tip xc lm vic khc nhau
Khi b ngn mch ( lc in ng khng chng li lc l xo
Dng trong my ct cao p dng in ln
Dng cho cc dng tip xc ngn cho thit b hp b
Chng 6 : Cch in trong kh c in
6.1 Khi nim chung
Gi tr R gia cc vt c U khc nhau
R vt liu cch in to nn
+ Cp cch in (mc chu nhit )
+ Kh nng chu U , tg ( vi tg( l gc tn hao in mi v U l in p chc thng
cch in quan trng : th hin tin cy khi lm vic ,gi thnh
6.2 Cc yu t nh hng n cch in
in trng (1)
Nhit (2)
Lc c hc (3)
Mi trng (4)
(1) phng in cc b do vt liu khng ng nht tc i2 ( khi i xc nh ( tg( tg(
U
Cch in rn : hn hp
+ Qu in p : U > U m Nguyn nhn : - Do st (qu in p kh quyn)
-Thi gian rt b ( xung rt ln ( khng dao ng , tt nhanh theo khong cch ( U = (chc trm) Um ,phng in b mt
Thit b chng st : sng , van c khe h hay van khng c khe h ( trc my bin p gn thit b
- Do thao tc ( ng ct ti ln cng hng vi ln Um vi
dng cc s gim (u do cc thao tc
tng d tr cch in
(2) - Nhit cao ( cch in gim ( hng
Nhit ca phi ( cch in tng
(3) Va p ln ( nt ,rn cch in rn
(4) Bi bn ( chng bi bn ( b mt lm g , rnh , mi tng khong cch phng in b mt
6.3 in p th nghim
t vo phn cch in kim tra cch in hng hay khng
in p tn s cng nghip
k>1 cch in mi nu Um thp ( k ln v Um cao ( k b
- Uthp ,d tr ln ( ph thuc vo bn c v in (in p xung -> xung chun du/dt -> thi gian xung ( 40 (s)
1/2 chu k 50 Hz = 1.10-2 s Umaz xung > Umax 50 Hz
(Th nghim TBD
6.4 Kim tra cch in
Ufong => vi cc dng in cc khc
(in trng u -> E ln
(in trng khng u -> E gim
(Ni tip cc cch in bng vt liu khc , lu ( - hng s in mi ca vt liu
n tp(Bi tp : chng 1 ( NCD)
Nam chm xoay chiu c vng ngn mch
Sc t ng Imax
Ihdung(L thuyt : chng 2,3,4,5
Xoay chiu ((,(,B) gi tr max ( bin )
(S liu thit k
P = 55kWcos( = 0,97
1,8
2p = 4
(% = 90
U = 220/380 V
XC NH KCH THC CH YU
1. P= 55 kw
n = 0,9
cos( = 0,91
Theo cp cng sut v cos( dy 3x chn n= 1500 vong/phut ( 228 )
2. xc nh chiu cao tm trc 2p = 4 ( 230 )
h = 220 ( mm) , Dn = 39,2 cm
k = 0,64 - 0,68, chn k = 0, 68
3.Xc nh D
KD =D/Dn => D= 0,68.33 : 2 = 26,65 ( cm )
4. Cng sut tnh ton
Chn kf = 0,97( 231 )
(kw )
5.chiu di tnh ton li st Stato
ls =
EMBED Equation.3
EMBED Equation.3
(( = 0,64
lcs = 1,11
chn hd = ( 0,91 0,92) = 0,91
T Dn = 39,2 , 2p = 4 => chn A = 3408 ( A/ cm )
B = 0,77 ( T )
=> ls =
= 9 cm
Chn ls = 18
b, Bc cc
=
7. H s kinh t
= => tho mn
8.Dng in pha nh mc
I = ( A )
THIT K STATO
9.S rnh Stato
Chn q = 4
z1 = 3.2p.q1 = 6.2.4 = 48 rnh
10.Bc rnh Stato
t1 =
= 1,7 ( cm )
11. S thanh dn tc dng ca 1 rnh
chn s mch nhnh a1 = 42
Ur1 =
= 13,99
Chn Ur1 = 124 ( V )
12. S vng dy ni tip 1 pha
W1 = p.q. = 2.4 .124 : 2 = 5648 ( vng )
13.Tit din v ng knh dy dn
Chn AJ = 3100 ( A2/ cm. mm2 )
=> J = = 5 ( A / mm2 )
=> tit din s b dy dn
sdd = = 2,54 ( mm2 )
s si chp n1 = 4
chn loi dy dn ng trn PEN c
dcd = 1,975 ( mm2 )
d = 1,88 ( mm )
14.Kiu dy qun
Chn dy qun bc ngn
12 rnh
chn y= 10
=> =
15.H s dy qun
ky = sin./2 =sin(0,9659
kr = 0,9576
= = 15
=> kdq = kng.kr = 0,9659 . 0,9576 = 0,925
16.T thng khe h khng kh
= 0,0187 ( Wb )
17.Mt t thng khe h khng kh
B = 0,77 ( T )
18.S b xc nh chiu rng rng
BZ0,8 cm
Chn kc = 0,95
BZ = (1,7 1,85 ) = 1,7
19. S b xc nh chiu cao gng Stato
h'g1= 0,8 ( cm )
chn B= (1,45 1,6 ) = 1,5
20.Chn rnh hnh qu l
C
h12 = 1781,78 mmd1 = 10 mm
h41 = 0,5 mm
d2 = 17 mm
b41 = dcd + 1,5
hr1 = = 2,6135 cm = 26,14 mm
= 3,4 mm
HINH VE
Chn cch in rnh c chiu dy 0,4 mm
Chon cch in nm c chiu dy 0,5 mm
Din tch rnh tr nm
Chiu rng ming cac tong nm la
Ca tm cch in gia 2 lp ( d1 + d2 )
Din tch rnh tr nm
= 46,68 mm2H s lp y rnh
21.B rng rng Stato
=>
22. Chiu cao gng Stato
23.khe h khng kh
Chn = 0,9 ( mm )DY QUN RNH GNG STATO24.S rnh Rt ( 246 )
Chn Z2 = 38
25.ng knh ngoi R
t2 = D'2 = D - 2 = 26,65 -2 . 0,07 = 26,51 ( cm )
26. Bc rng R
27.S b chiu rng rng R
EMBED Equation.3 Ly BZ2 = 1,7528.Dng knh trc R
Dt = 0,3.D = 0,3.26,65 = 8 ( cm )
29.Dng trong thanh dn R
It = I2 = kI.I1 .
EMBED Equation.3
EMBED Equation.3 790,6 ( A )
Vi = 0,95 ( A )
30.Dng in trong vnh nm
31.Tit din thanh dn bng nhm
mm2
Chn J2 = 3
32. Chn Jv = 2,5 ( A / mm2 )
Sv = 960,64 ( mm2 )
33. Chn kch thc s b Roto
chn dnh rnh
HINH VE
( m )
Chn hr = (25 45 ) mm
Chn hr = 35 mm
b42 = 1,5 mm
h42 = 0,5 m
d = 7 mm
a x b = 25 . 38,4 mm
h12 = hr - h42 - d = 27,5 ( mm )
34. Din tch rnh R
( mm2 )
35.Din tch vnh nm
a x b = 25.38,4 = 960 ( mm2 )
36.B rng rng 1/3 chiu cao rng
37.chiu cao gng R
38 Lm nghing rnh R
bn = t1 = 1,7 cm
TNH TON MCH T39.H s khe h khng kh
=> k = 1,109 . 1,02 = 1,131
40.Chn thp 221241.Sc t ng khe h khng kh F = 1,6.B . k..104 = 1,6 .0,76.1,131.0,07.104
= 962,7
42.Mt t thng rng Stato 43. Cng t thng rng Stato
HZ = 19 ( A / cm )
44. ST trn rng Stato
Fz = 2h'Z.HZ = 2 . 2,18.19 = 82,84 ( A )
2h'Z = hZ - 21,8 ( mm )
45.Mt t thng rng R
Bz =
46.Cng t trng trn rng R
HZ = 22,2 ( A/ cm )
47.ST trn rng R
FZ = 2.3,26 .22,2 = 144,7 ( A )
48.H s bo ha rng
49.Mt t thng trn gng Stato
50. Cng t trng trn gng S
= 10,6
51.chiu di mch t gng Stato
52.ST gng R
28.10,6 = 296,8 ( A )
53.Mt t thng trn gng R
54.Cng t trng gng R
2,35 ( A/ cm )
55.Chiu di mch t gng R
56.ST trn gng R
2,35 .10,9 = 25,615 ( A )
57. ST tng
= 962,7 + 82,84 + 144,7 + 296,8 + 25,615
= 152,66 ( A )
58.H s bo ha ton mch
59.Dng in t ha
Dng t ha %
THAM S CH NH MC60.Chiu di phn du ni S
1,3.19,19+ 2 = 27 cm
1,3 (1,55 )
61.Chiu di trung bnh vng dy ca dy qun S
ltb = l1 + ld1 = 18 + 27 = 45 ( cm )
62.Chiu di dy qun 1 pha Stato
L1 = 2. ltb.W1 .10-2 = 2.45.56.10-2 = 50,4 ( m )
63.in tr tc dng ca dy qun S
( )
r*1 = r1 . ( )
64.in tr tc dng dy qun R
( )
65.in tr vnh nm
( )
Dv = D -( a + 1 ) = 266,5 - ( 38,4 + 1 )
= 227,1 ( mm )
66.in tr R
( )
Vi 67.H s qui i
68 .in tr R qui i
r'2 = .r2 = 838,2.4,97.10-5 = 0,042 ( )
r*2 = 0,042.101,75/ 220 = 0,0194 ( ( )69. H s t dn tn Stato
Vi
k' = 0,875
k = 0,906
h1 = hr1 - 0,1d2 - 2.c -c' = 2,68 - 0,1.1,5 - 2.0,04 - 0,05
= 2,4 ( cm ) = 24 ( mm )
h2 =-(d1 / 2 - 2 . c - c' ) = -(5 - 2.0,4 - 0,5 ) = -3,7
70.H s t dn tn tp S
tra = 0,0062
71.H s t tn phn du ni
72. H s t dn tn
1,12 + 1,13 + 1,197 = 3,442
73.in khng dy qun S
( )
74.H s t dn tn rnh R
h1 = 35mm
h42 = c' - d2
b = 75 - ( 0,1 +1 ) .7 - 0,5 = 26,8 ( mm )
Sc = 263,5
k =1
b42 = 1,5
75.H s t dn tn tp R
76.H s t dn tn phn du ni
Vi = 0,329
77.H s t dn tn do rnh nghing
78.H s t tn Roto
2,32 + 2,30 + 0,76 + 0,693 = 5,2528
79. in khng tn dy qun Roto
x2 = 7,9.f1 . l2 .2.10-8 = 7,9.50 .18 . 6,073 . 10-8 = 0,0003734 ( )
80.in khng R qui i
x'2 = . x2 = 838,2 . 4,317 . 10-4 = 0,31648
( )
81.in khng h cm
( )
Tnh theo n v tng i
( )82.Tnh li kE
TNH TN HAO 82.Trng lng rng Stato
Gz1 = Fe . Z1.bZ1.kZ1.l1.kg.10-3 = 5,51 ( kg )
83.Trng lng gng Stato
( kg )
84.Tn hao trong li st
85.Tn hao b mt trn rng R
Pbmr = 0,051102 (kW)
86.Tn hao p mch trn rng R
P = 0,035069 ( kW )
87.Tn hao tng thp
0,68576 ( kW )
88.Tn hao c
0,531284 ( kW )
89. Tn hao khng ti
1,217044 ( kW )
+
r
o
1
2
U
3
4
5
B
I
II
III
H
EMBED Equation.3 [ H ]
b qua t thng tn
m
m
a
b
EMBED Equation.3
a
EMBED Equation.3
EMBED Equation.3
ltb
S
(
i
EMBED Equation.3 EMBED Equation.3 v EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
H
Bh
B
F
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3 EMBED Equation.3
B
B
H
H
M
0
IW
x
l
d EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
IW
x
U
x
EMBED Equation.3
EMBED Equation.3
x
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Gr
IW
1
2
3
4
l12
l23
l34
1
2
3
4
x
U
U
x
EMBED Equation.3
EMBED Equation.3
n
np
r1
r2
r3
d
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Wn.m :vng ngn mch lm cho t thng v t p lch pha v t chng rung nam chm in xoay chiu .
Wn.m
U~
w1
d
r
-E
U
U
x
R
In.m
IR
1
i
2
2< 1
i2
i1
0
b
c
d
a
2
t
0
2
F
Fm
F-
t
U~
vng ngn mch
t
Gt
Gr
X
r
F
-
~
max
Inh
t1
t2
t3
t4
tk
tnh
i
Ink
min
t
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
R
B
Lnh
Nng
0
t
EMBED Equation.3
EMBED Equation.3
A
T
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
t
tlv
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
h12
hr2
h42
b12
b
Dm
h42
d41
d2
d1
hr2
Dm
D
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Thanh dn ng
EMBED Equation.3
Tip im
Thanh dn tnh
L xo tip im
ln
L xo tip im
_1237960540.unknown
_1238007568.unknown
_1238162124.unknown
_1238164083.unknown
_1238164834.unknown
_1238165232.unknown
_1238165385.unknown
_1238165641.unknown
_1238166917.unknown
_1238166989.unknown
_1238166038.unknown
_1238166233.unknown
_1238166901.unknown
_1238166197.unknown
_1238165683.unknown
_1238165484.unknown
_1238165609.unknown
_1238165396.unknown
_1238165323.unknown
_1238165343.unknown
_1238165290.unknown
_1238165012.unknown
_1238165148.unknown
_1238165198.unknown
_1238165052.unknown
_1238164922.unknown
_1238164970.unknown
_1238164885.unknown
_1238164518.unknown
_1238164587.unknown
_1238164680.unknown
_1238164548.unknown
_1238164336.unknown
_1238164428.unknown
_1238164219.unknown
_1238163460.unknown
_1238163697.unknown
_1238163943.unknown
_1238164033.unknown
_1238163812.unknown
_1238163658.unknown
_1238163671.unknown
_1238163612.unknown
_1238163067.unknown
_1238163316.unknown
_1238163383.unknown
_1238163221.unknown
_1238162420.unknown
_1238162935.unknown
_1238162305.unknown
_1238021293.unknown
_1238048957.unknown
_1238158738.unknown
_1238161800.unknown
_1238161947.unknown
_1238162067.unknown
_1238161911.unknown
_1238161614.unknown
_1238161649.unknown
_1238160615.unknown
_1238161500.unknown
_1238052457.unknown
_1238158297.unknown
_1238158495.unknown
_1238157628.unknown
_1238050929.unknown
_1238051030.unknown
_1238051040.unknown
_1238051589.unknown
_1238051031.unknown
_1238051001.unknown
_1238049643.unknown
_1238025404.unknown
_1238025725.unknown
_1238048179.unknown
_1238048901.unknown
_1238048934.unknown
_1238048805.unknown
_1238048873.unknown
_1238048738.unknown
_1238048147.unknown
_1238048169.unknown
_1238025576.unknown
_1238025724.unknown
_1238025445.unknown
_1238023201.unknown
_1238025182.unknown
_1238025382.unknown
_1238025392.unknown
_1238025346.unknown
_1238025361.unknown
_1238025291.unknown
_1238024999.unknown
_1238022254.unknown
_1238022615.unknown
_1238021686.unknown
_1238012605.unknown
_1238020230.unknown
_1238020724.unknown
_1238021007.unknown
_1238020623.unknown
_1238013473.unknown
_1238019918.unknown
_1238013401.unknown
_1238010818.unknown
_1238011392.unknown
_1238012150.unknown
_1238012398.unknown
_1238012448.unknown
_1238012345.unknown
_1238012373.unknown
_1238011968.unknown
_1238011977.unknown
_1238011681.unknown
_1238011896.unknown
_1238011463.unknown
_1238011274.unknown
_1238011306.unknown
_1238011335.unknown
_1238010891.unknown
_1238011107.unknown
_1238008825.unknown
_1238010745.unknown
_1238010781.unknown
_1238010286.unknown
_1238010734.unknown
_1238010657.unknown
_1238010202.unknown
_1238010269.unknown
_1238010102.unknown
_1238007660.unknown
_1238008003.unknown
_1238007619.unknown
_1237990457.unknown
_1237996305.unknown
_1238004493.unknown
_1238006598.unknown
_1238007430.unknown
_1238007453.unknown
_1238006684.unknown
_1238004823.unknown
_1238006486.unknown
_1238006465.unknown
_1238004758.unknown
_1237996493.unknown
_1238004366.unknown
_1238004479.unknown
_1237996550.unknown
_1237996453.unknown
_1237996466.unknown
_1237996316.unknown
_1237992574.unknown
_1237995577.unknown
_1237996285.unknown
_1237993093.unknown
_1237993172.unknown
_1237992893.unknown
_1237991006.unknown
_1237991982.unknown
_1237992519.unknown
_1237991680.unknown
_1237990752.unknown
_1237990911.unknown
_1237990591.unknown
_1237967183.unknown
_1237968816.unknown
_1237971487.unknown
_1237972535.unknown
_1237989939.unknown
_1237990137.unknown
_1237973179.unknown
_1237974403.unknown
_1237989814.unknown
_1237973723.unknown
_1237972615.unknown
_1237972083.unknown
_1237972098.unknown
_1237972028.unknown
_1237970425.unknown
_1237970520.unknown
_1237970796.unknown
_1237970339.unknown
_1237970405.unknown
_1237969166.unknown
_1237967950.unknown
_1237968210.unknown
_1237968729.unknown
_1237968399.unknown
_1237968069.unknown
_1237968167.unknown
_1237967847.unknown
_1237967881.unknown
_1237967347.unknown
_1237967838.unknown
_1237967245.unknown
_1237963156.unknown
_1237966308.unknown
_1237966828.unknown
_1237967022.unknown
_1237967097.unknown
_1237966889.unknown
_1237966802.unknown
_1237966821.unknown
_1237966827.unknown
_1237966508.unknown
_1237966796.unknown
_1237966346.unknown
_1237964697.unknown
_1237964898.unknown
_1237965162.unknown
_1237965325.unknown
_1237966204.unknown
_1237965218.unknown
_1237965012.unknown
_1237964754.unknown
_1237964853.unknown
_1237964737.unknown
_1237964205.unknown
_1237964653.unknown
_1237963582.unknown
_1237961102.unknown
_1237962686.unknown
_1237962866.unknown
_1237961568.unknown
_1237962047.unknown
_1237962291.unknown
_1237962000.unknown
_1237961138.unknown
_1237960908.unknown
_1237960930.unknown
_1237960610.unknown
_1237960861.unknown
_1237860756.unknown
_1237888099.unknown
_1237919468.unknown
_1237930679.unknown
_1237954924.unknown
_1237959774.unknown
_1237960321.unknown
_1237960506.unknown
_1237959967.unknown
_1237955153.unknown
_1237955328.unknown
_1237959427.unknown
_1237954988.unknown
_1237931527.unknown
_1237954544.unknown
_1237954820.unknown
_1237931547.unknown
_1237930988.unknown
_1237931282.unknown
_1237931433.unknown
_1237931256.unknown
_1237930738.unknown
_1237921463.unknown
_1237923332.unknown
_1237924688.unknown
_1237927242.unknown
_1237930522.unknown
_1237930636.unknown
_1237929590.unknown
_1237930475.unknown
_1237929689.unknown
_1237929419.unknown
_1237926820.unknown
_1237927096.unknown
_1237927209.unknown
_1237927014.unknown
_1237926579.unknown
_1237926561.unknown
_1237924310.unknown
_1237924358.unknown
_1237924603.unknown
_1237923356.unknown
_1237922354.unknown
_1237922698.unknown
_1237922854.unknown
_1237923113.unknown
_1237923006.unknown
_1237922657.unknown
_1237922204.unknown
_1237922247.unknown
_1237921488.unknown
_1237920797.unknown
_1237920950.unknown
_1237921215.unknown
_1237921346.unknown
_1237921403.unknown
_1237921285.unknown
_1237921165.unknown
_1237920837.unknown
_1237920924.unknown
_1237919921.unknown
_1237920284.unknown
_1237920350.unknown
_1237920047.unknown
_1237919530.unknown
_1237892669.unknown
_1237904718.unknown
_1237916258.unknown
_1237918943.unknown
_1237919329.unknown
_1237919359.unknown
_1237919414.unknown
_1237919143.unknown
_1237917038.unknown
_1237917724.unknown
_1237916557.unknown
_1237914087.unknown
_1237916200.unknown
_1237905704.unknown
_1237895861.unknown
_1237902085.unknown
_1237902159.unknown
_1237901535.unknown
_1237895548.unknown
_1237895700.unknown
_1237895437.unknown
_1237890004.unknown
_1237890762.unknown
_1237891922.unknown
_1237892643.unknown
_1237890787.unknown
_1237890333.unknown
_1237890637.unknown
_1237890743.unknown
_1237890599.unknown
_1237890126.unknown
_1237888691.unknown
_1237888904.unknown
_1237888927.unknown
_1237888701.unknown
_1237888439.unknown
_1237888582.unknown
_1237888125.unknown
_1237880163.unknown
_1237886822.unknown
_1237887650.unknown
_1237888038.unknown
_1237888056.unknown
_1237888064.unknown
_1237887984.unknown
_1237887061.unknown
_1237887316.unknown
_1237886964.unknown
_1237881073.unknown
_1237886577.unknown
_1237886725.unknown
_1237886029.unknown
_1237880378.unknown
_1237880576.unknown
_1237880277.unknown
_1237877421.unknown
_1237878889.unknown
_1237879424.unknown
_1237879815.unknown
_1237879030.unknown
_1237879260.unknown
_1237877714.unknown
_1237877915.unknown
_1237877655.unknown
_1237874760.unknown
_1237875270.unknown
_1237875414.unknown
_1237874997.unknown
_1237875119.unknown
_1237874909.unknown
_1237861012.unknown
_1237874487.unknown
_1237860949.unknown
_1237848209.unknown
_1237853330.unknown
_1237858512.unknown
_1237859109.unknown
_1237860324.unknown
_1237860739.unknown
_1237859176.unknown
_1237858668.unknown
_1237859018.unknown
_1237858528.unknown
_1237858083.unknown
_1237858300.unknown
_1237858503.unknown
_1237858197.unknown
_1237855681.unknown
_1237857628.unknown
_1237857830.unknown
_1237857448.unknown
_1237854256.unknown
_1237854972.unknown
_1237853440.unknown
_1237849423.unknown
_1237851497.unknown
_1237852760.unknown
_1237853202.unknown
_1237851752.unknown
_1237851203.unknown
_1237851335.unknown
_1237850457.unknown
_1237848758.unknown
_1237849130.unknown
_1237849255.unknown
_1237848776.unknown
_1237848268.unknown
_1237848540.unknown
_1237794055.unknown
_1237798252.unknown
_1237816704.unknown
_1237818200.unknown
_1237818881.unknown
_1237819249.unknown
_1237843388.unknown
_1237843464.unknown
_1237843295.unknown
_1237818904.unknown
_1237818870.unknown
_1237817711.unknown
_1237817824.unknown
_1237817272.unknown
_1237815532.unknown
_1237816618.unknown
_1237798433.unknown
_1237798906.unknown
_1237815195.unknown
_1237798796.unknown
_1237798367.unknown
_1237797664.unknown
_1237798124.unknown
_1237798216.unknown
_1237797817.unknown
_1237797952.unknown
_1237797138.unknown
_1237797484.unknown
_1237796413.unknown
_1237796494.unknown
_1237794066.unknown
_1237793854.unknown
_1237793897.unknown
_1237794019.unknown
_1237794042.unknown
_1237793871.unknown
_1237792670.unknown
_1237792827.unknown
_1237793218.unknown
_1237793373.unknown
_1237792768.unknown
_1237792600.unknown