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7/30/2019 Quan May Bien AP

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Cc ilngca MBA

Tm hiu chung MBA

Kthutqun dy MBA

ngdngca MBA


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My bin p l mtthitbint tnh,hot ng

da trn hintngcmngint, dng bin

iin p xoay chiu m khng lm thay itn

sca n.

I/ TM HIU CHUNG MBA

1. NH NGHA:


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2. CU TO


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MCH T( LI THP)

Dng lm mch dn t, ng thi lmkhung mch qun dy qun


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CH:

Hnh dng, kch thc, trng lng ph

thuc vo cng sut.

c lm bi cc l thp k thut in mng cchiu dy 0,1-0,5mm ghp li.

MCH T(LI THP)


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DYQUN

Dy qun c nhim v: tng gim in p.

Dy qun ni vi ngun in c gi lcun s cp, cun cn li ni vi ti tiuth l cun th cp.


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VMY

Cng dng: bo v cc phn t bn trong.V ca my bin p thng c lm bnglm nha,bng g,bng thp, bng gang hoc

tn mng.


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4. PHNLOI

Ty theo s pha ca dng in m ngi taphn chia cc my bin p ra lm 2 loi:

My bin p 1 pha

My bin p 3 pha


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MYBINP 1 PHA


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MYBINP 3 PHA


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3. NGUYN L LM VIC MBA

Da trn hintngcmngint


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Dng in xoay chiuchy trongcunscp gy ra tthng binthin qua cunthcp, lm xut

hin trong cunthcpmtsutinng xoay chiu.Numchthcp kn th c dng

inchy trong cunthcp.


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Ngi ta gi : K = E1/E2 = W1/W2 = U1/U 2 lt s bin p

Nu :

K > 1 MBA h pK < 1 MBA tng p

K = 1 MBA cch ly (MBA an ton)


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II/ TNHTONCCILNGMBA

Xc nh cng sutS vng dy cacun dy

Tnh ng knh dy qunTnh din tch cas li thp


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CNGSUT

Cng thc xc nh cng sut mybin pcnh:

S: titdin li st (cm2);

P: cng sut ca MBA

S =1,2 P


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SVNGDYCACUNDY

V: in p t vo cun bin p (volt);N: s vng cun dy ca bin p;

B: cm ng t (Gauss);

f: tn s ca dng in s dng;S: tit din li st t (cm2);

V = 4,44.10-8 .N.B.f.S


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Trong thctngi ta thngly f = 50

Hz, B ~ 8000-12000 (Gauss). Ta c cngthc tnh s vng dy ca MBA ngvi 1volt:

~45Sn =

N

V


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Gii: -Ta c: s vng ngvimi volt:

S vng dy cnqun cunscp:

7.83 x 220 = 1722 (vng);S vng dy cnqun cunthcp:

7.83 x 12 = 94 (vng);

45

S

n = =45

5.75

= 7.83 (vng/volt)

V d: Tnh s vng dy cn qun vi:S = 5.75 cm2, U1 = 220 V, U2 = 12 V.


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NGKNHDYQUN- C S => P .

- P = U1 . I1 = U2. I2 => I1 , I2- Ta c: S = 1mm2 I= 3 (A)- Ta tnh c S1 , S2 ( S: titdindy qun);

- Vy: S = (d2)/4

ng knh dy qun s cp:

ngknh dy qun th cp:

4S1

d2 4S2

=

d1 =


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VD: TAOCDINTCHLISTTS=5.75CM2 , U1 = 220 V, U2 = 12V. TMNGKNHDYQUNCUNSCPVTHCP.

Gii:- Slist = 5.75cm2

=> P = (S/1,2)

2

= 23 W- I1 = (P/ U1) = 23: 220 = 0.10 A- I2 = (P/ U2) = 23 : 12 = 1.92 A

- Sdyqun = 1mm2

I= 3 (A)- => S1 = 0.033 mm2 => d1 =0.2 mm

S2 =0.640 mm2 => d2 = 0.9mm


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TNHDINTCHCASLITHP

Din tch cas:Scs = h.c


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III/ KTHUTQUNDY

1.Nhngvtdngcnthit:Khun cch in nhm mcch cch ingiacun dy vmch t,cn lm sn cng

nh hnh cun dyKhun c lm bng vt liucacton cng nh giy cch in

presspahn hoc bng cht dochunhit.


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Dy qun MBA gm 2 loi:

Loi dy cotton: Loi dy bcbnglpttnhin hay nhn tohocbngvisi

Loi dy e-may:

L loi dy c trng lp sn vecni bn ngoi

Loi dy e-may c dng rt nhiu qun MBA

nh.u im:

t ht m v c th chu nhit cao.


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LOIDYE-MAY(LOIDYTRNGMEN)

Cch chn:

Loi dy e-may c lp vecni c trng uv bm chc vo dy khng trc ra khi

dng mng tay co. dy e-may phi d un v c n hi

khi qun dy khng b gy.


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Vtliu dng lmmcht:

L thp mng v do l tt.

B dy ca l thp l 0.10 mm0.15 mm -

0.20 mm0.25mm0.39 mm0.40mm0.5mm


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CCLOIMCHT

Khi mi u, ngi ta ch dng

1 loi l thp hnh ch I.

Hin nay l thp thng dng

nht gm 2 phn: 1 phn ch E

v 1 phn ch I ri ghp lithnh mt khung vung qun

1 MBA


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VTLIUCCHIN: C 2 LOIGIYDUVGIYBI

- Giydu l giy cch in lt trong cc loingc.

- Giyducngnhgiybi chia loi dymng khc nhau.

B dy cagiyt 0.10 mm 0.20 mm- 0.30

mm 0.4 mm 0.5 mm ngha l 10% ca 1lyv ly


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Cch s dng:

+ My c cng sut cao phi dng giy du

+ My c in th cao phi dng giy tt

Loi giy bi thng c dng lm khun, cinng

Loi giy du thng c dng t cchgia 2 lp dy qun chng ln nhau


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2. CCBCTINHNH

a) Lm khun:+Lm thn khun: Phn thn khun c dng hnh

hpchnht, v c kch thca, b, h nh hnh v.

ab

h


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Bc1:o v vch cc kch thc a, b, h trngiy.

h


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Bc 2: lm l cc ng giao.

Lythchoc bt gch cc ng giao nhau chol dgp cc cnh khun.

h a b1 5


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Bc 3:gp v dn 1 vi 5

2

1

1

5

a

h b

ab

h


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+Lm m khun:

Bc 1:ct m khun

Bc 2: o v k cc kch thc a, c, b nh hnh vBc 3:Ni v ct hai ung cho

Bc 4:clbt dy

b cc

c

a

c

c


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+Rp khun: Ginphn thn khun vi m khunvi nhau.

ha

b

h

a

b

c 0v 48v

0v 6v

Di l


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Qun dy:


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CH:

Trong lc qun dy c gng qun dycho thng v song hng vi nhau.

C ht mi lp dy li lt giy cchin.

i vi dy qu b (d< 0,15 mm) c th

qun sut khng cn giy cch in giacc lp. Ch cn lt cch in k gia cuns cp v th cp.


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Lng li thp:


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QUNMYBINTHBNGMYTRONGCNG

NGHIP.


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IV/ NGDNG

MBA c dng ch yu trong truynti v phn phi in nng;

Ngoi ra, MBA cn c s dngtrong l nung (MBA l), trong cc thitb o lng, lm ngun cho cc thit b

in t,....


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MBA OLNGDNGTRONGPHNGTHNGHIM


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MBA TNGU


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MBA DNG TRONG CNG NGHIP


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MY BIN P DNG TRONG


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MY BIN P DNG TRONG

SN XUT V TIU DNG


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TILIUTHAMKHO

1. http://tailieu.vn/2. http://www.ebook.edu.vn

3. Gio trnh V Tuyn in , tc gi:Phan

Thanh Vn4. Gio trnh My Bin p, tc gi: Phm

Vn Bnh v L Vn Doanh

5.

Gio trnh Thit K My Bin p, tcgi: Phan T Th
http://tailieu.vn/http://www.ebook.edu.vn/http://www.ebook.edu.vn/http://tailieu.vn/


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Bi thuyttrnh n y l kt

thc, xin thnh tht cm n ccbn ch theo di!

1


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NHM 1Bin son:

NGUYN TH LIN TNH

CHU TH NGC HI

HUNH LM TRC ANHK thut:

TRN THY TRANG

NGUYN TH THY HNGBI TH NHA TRANG

Trnh by: NGUYN TH HNG NGC

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