Bai 9 Tinh Toan Thiet Ke May Bien AP 1 Pha

7/29/2019 Bai 9 Tinh Toan Thiet Ke May Bien AP 1 Pha

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Bi 8:Bi 8:TNH TON, THIT K MY BiN P 1 PHATNH TON, THIT K MY BiN P 1 PHA


Chng II: MY BIN P

Ngi son:Trn Nh Tho,Trung tm KTTH-HN Hng Tr.

Bi 8: (TPP 18-19)

TNHTON, THIT KTNHTON, THIT KMY BIN P MT PHAMY BIN P MT PHA
http://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpg


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Bi 8: (Lthuyt, TPP 18)

TNH TON, THIT KMY BIN P MT PHA

http://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer-hightolow_smaller.jpghttp://en.wikipedia.org/wiki/Image:Drehstromtransformater_im_Schnitt_Hochspannung.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer-hightolow_smaller.jpghttp://en.wikipedia.org/wiki/Image:Drehstromtransformater_im_Schnitt_Hochspannung.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer-hightolow_smaller.jpghttp://en.wikipedia.org/wiki/Image:Drehstromtransformater_im_Schnitt_Hochspannung.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Small_toroidal_transformer.jpghttp://en.wikipedia.org/wiki/Image:Drehstromtransformater_im_Schnitt_Hochspannung.jpghttp://en.wikipedia.org/wiki/Image:Drehstromtransformater_im_Schnitt_Hochspannung.jpghttp://en.wikipedia.org/wiki/Image:Small_toroidal_transformer.jpghttp://en.wikipedia.org/wiki/Image:Transformer.filament.agr.jpghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:PoleMountTransformer02.jpghttp://en.wikipedia.org/wiki/Image:Transformer-hightolow_smaller.jpg


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Bi 8:TNH TON, THIT KMY BiN P MT PHA.

MC TIU:

1- Hiu c quy trnh chung tnh ton, thit

k MBA 1 pha cng sut nh.2- Hiu c yu cu, cch tnh ca tng bckhi thit k MBA 1 pha cng sut nh.
http://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpghttp://en.wikipedia.org/wiki/Image:Transformer3d_col3.svghttp://en.wikipedia.org/wiki/Image:Polemount-singlephase-closeup.jpg


4/22



- Tnh ton my bin p nh th no? Gmnhng ni dung g ?

1-Tnh cng sut ( Sm)2-Tnh ton mch t ( Tit din li thp, l

thp)

3-Tnh s vng dy ca cc cun dy. ( N1, N2 )4-Tit din dy qun ( Sd),chn ng knh dy ( Ddq).

5-Tnh din tch ca s li thp ( Scs)

1-Tnh cng sut ( Sm)2-Tnh ton mch t ( Tit din li thp, l

thp)

3-Tnh s vng dy ca cc cun dy. ( N1, N2 )4-Tit din dy qun ( Sd),chn ng knh dy ( Ddq).

5-Tnh din tch ca s li thp ( Scs)


5/22



+Vic tnh ton MBA phi da vo mt s php tnh rt phctp nh gii quyt cc ch c ti, gii hn st p cho php,nhit ti a. Do , trong thc t gii quyt vn k thutny theo phng php tnh ton mt s php tnh thc nghimn gin nhng kh chnh xc.

Gm cc bc sau y:

1- Xc nh cng sut ca MBA.2- Tnh ton mch t.3- Tnh s vng dy ca cc

cun dy.4- Tnh tit din dy qun, chn

ng knh dy.5- Tnh tit din ca s li thpa

h

b

c

Shi

a/2


6/22



1- Xc nh cng sutMBA:-

Xc nh cng sut MBA cn ch to, v hiu sutMBA rt cao, nn:

S1 = S2 = U2x I2 ( V.A.)Cng sut MBA cn ch to s l:

Sm = U2x I2 ( V.A.)

Trong :U2v I2 l in p v dng in th cp nhmc ca MBA theo yu cu ca ngi thit k (da vo ph ti )


7/22



2- Tnh ton mch t MBA :

a) Chn mch t kiu bc ckch thc nh sau:

a: Chiu rng tr qun dy.b: Chiu dy tr qun.c: Chiu rng ca s.h: Chiu cao ca s.a/2: rng l thp ch I.

Nh vy, tit din tr thpchnh:

Shi = a x b ( cm)

a

h

b

c

Shi

a/2

b


8/22



2- Tnh ton mch t MBA :b) Tnh tit din tr qun dyca li thp:Din tch ca tr qun dy

phi ph hp vi cng sutMBA. Tnh gn ng theo CTthc nghim:a/2

a

h

b

c

Shi

a/2

mhiSS 2,1==

Trong :Shi = a x b ( cm2) l din tchhu ch ca tr.S

m

l cng sut MBA ( V.A.)


9/22



2- Tnh ton mch t MBA :+Tnh tit din tr qun dyca li thp:Bit din tch ca tr qun

dy, tnh b dy ca li thpv s X tm l thp ( dy0,5mm)a/2

a

h

b

c

Shi

a/2

a

SbbaS

hi== v

Trong :Shi = a x b ( cm2) l din tch huch ca tr.X l s tm l thp ( dy 0,5mm)

5,0

10=b

X


10/22



Bi tp 1:

Tnh ton mch t cho 1 MBA d kin in p vo 220vn, in p ra 12 vn, 5 ampe?

Gii:1-Tnh ton cng sut MBA:V hiu sut cao nn Sm = S1 = S2= U2x I2

mhiSS 2,1=

602,1=hi

S

S m= 12 x 5 = 60VA

Shi= 1,2 x 7,75 = 9,3 cm2

2- Tnh din tch li thp: p dng CT:
http://var/www/apps/conversion/tmp/scratch_1/D:%5CWINDOWS%5Csystem32%5Ccalc.exe


11/22



Bi 8: (L thuyt, TPP 19)

TNH TON, THIT KTNH TON, THIT KMY BIN P MTMY BIN P MTPHA (TT)PHA (TT)



12/22



Bi tp 1:

Tnh ton mch t cho 1 MBA cng sut nh, d kinin p vo 220 vn, in p ra 12 vn, 3 ampe?

Gii:1-Tnh ton cng sut MBA:V hiu sut cao nn Sm = S1 = S2= U2x I2

mhiSS 2,1=

362,1=hi

S

S m= 12 x 3 = 36VA

Shi= 1,2 x 6 = 7,2 cm2

2- Tnh din tch li thp: p dng CT:


13/22



Bi 8: (TPP19)TNH TON, THIT K

MY BIN P MT PHA (TT)

MC TIU:

1- Hiu c quy trnh chung tnh ton, thitk MBA 1 pha cng sut nh.

2- Hiu c yu cu, cch tnh ca cc bc tnhs vng dy qun, tit din dy, ng knh dy,din tch ca s dy qun.

3- Rn k nng tnh ton MBA theo thc nghim.


14/22



3- Tnh s vng dy ca cc cun dyMBA:-

Trong :

42 l h s cho st tt. 50 : st xu

b - T , tnh c s vng cun s cp:N1= n x U1.

c - S vng cun th cp:N

2

= n x (U2

+ 10% U2

) .

hiS

n50_42

=

Xc nh s vng/ 1 vn (n) l i lng trunggian tnh s vng s cp N1 v th cp

N2 :a- S vng n c th tra bng (8-3 SGK)hoc tnh theo cng thc thc hnh:


15/22



BT2: -Tnh ton s vng/vn v s vng s cp,th cp cho 1 MBA d kin in p vo 220vn, in p ra 12 vn, 3 ampe?

Gii:

1-Tnh ton cng sut MBA:V hiu sut cao nn2- Tnh din tch li thp: Thay s vo

,

3- Tnh s vng/vn : (St tt)

4- S vng s: N1=n x U1=

cun th: N2=n x (U2+10%U2)=

362,1=hi

S

hiSn

42=

6 x (12+1,2)

=

6 x 220=

Shi= 1,2 x 6 = 7,2 cm2

Sm = U2 x I2 =12 x 3 = 36VA

68,52,7

42==

1320 vng79,2 vng


16/22



4- Tnh tit din dy qun hoc ng knhdy:-Tit din dy dn c tnh nh sau:

Trong :Sd l tit din dy ( mm2)I : Cng ( cun s hoc th) :

AmpeJ: Mt dng in A/mm2

+ Bng chn tr s J theo cng sut MBA:

J

IS

d=

Sd

Sm(VA) >500 >200 >100 >50 50

J(A/mm2) 2 2.5 3 3,5 4


17/22



4- Tnh tit din dy qun hoc ng knhdy:-

Trong :Sd l tit din dy ( mm2)

Dd: ng knh ( cun s hoc th):mm: Chn 3,14

+ Hoc dng bng chn tr s Dd theo tit

din dy ( bng 8-5 SGK)

14,3

4 dd

SD =

Sd

Dd

ng knh dy qun c tnh nh sau:


18/22



5- Tnh din tch ca s li thpMBA :

+Din tch ca s li thp c kchthc nh sau:

Scs= H x cChiu cao ca s: H = 3c s tit kimvt liu v hnh dng MBA p.Tng tit din 2 cun s cp v th

cp:

Ssc=N1.Sd1 v Stc=N2.Sd2

Vy

Kl: h s lp y. Kl = 0,2 0,3 0,4:theo cng sut Sm tng ln t 100

a

h

Scs

c

a/2

a/2

l

tcsc

cs

K

SSchS

+= .

Ssc

c

Stc


19/22



6- Sp xp dy qun trong ca s, v s qun dyMBA:-

a-Tnh s vng dy cho mi lp :h

ng knh dy c cch in

S vng mi lp = - 1

S vng dy mi

lp

S vng dyS lp dy qun =

b-Tip , tnh s lp dy qun:

c-V s qun dy c ghi ch s vng chomi cun dy:

- S vng cun s cp N1 , th cp N2 ; N2

N2


20/22



Bi tp: Hy ni cc cu ct A vi ct B chohp l:

Th t ccbc (B)

4

3

5

1

2

Ni dung cc bc (A)

Xc nh cng sut ca MBA.Tnh ton mch t.

Tnh s vng dy ca cc cun dy

Tit din dy qun, chn ngknh dy.

Tnh tit din ca s li thp


21/22



- Bi tp p dng: ( Theo nhm, mi nhm 1cu)

1) Tnh ton qun dy cho 1MBA c in p cun s cp l 220v, cun th cp c in p l 6vn, 12 vn. Cho st tt, mu lthp bc c a = 3 cm.a/2

a

h

b

c

Shi

a/2

2) Cho mu l thp o c a=3,2

cm, b = 3,8 cm. Tnh cng sut dkin ca MBA. Cho U1= 48 v, U2=6v,9v. Tnh s vng dy v v s qun dy cho my?


22/22



KNH CHC QU THY CSC KHE & THNH T

Thc hin: TRN NH THO Thng 10,2010

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Bai 9 Tinh Toan Thiet Ke May Bien AP 1 Pha