TN Bin i nng lng in c Version 1.3

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Bi 3: MY BIN P MT PHA C NHNH SHUNT T

-----------------------

I. Mc tiu:

Gip sinh vin hiu r hn v s nh hng ca cu to mch t n c tnh lm vic

ca my bin p. C th l s nh hng ca t thng r ln gi tr in khng tn ca my bin

p.

II. Thit b th nghim:

- My bin p 1 pha 220/110 volts, 5/10 A. c nhnh phn t v khe h khng kh

- My bin p t ngu dng to in p thay i c cung cp cho cun s cp ca

my bin p mt pha.

- Ampere k, Volt k, Watt k, Ti

1.My bin p : 2.VOM

N

1

N

2

TN Bin i nng lng in c Version 1.3

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3.Variac : 4.Hp in tr :

III. Tin trnh:

A. Th nghim khng ti

S nguyn l:

MBA 1PHA

A1 B1

A2 B2

V1

220VAC

VARIAC

A

X

a

x

A

V

W

V

**

Lp mch th nghim theo s u dy m sinh vin v.

Nh GV n kim tra mch trc khi ng ngun in vo mch

o v tnh cc thng s theo bng sau:

TN Bin i nng lng in c Version 1.3

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U10(V) 40 60 80 100 120 140 160 180 200 220

U20(V)

I10(A)

Cos10

P10(W)

Bng 3.1 - Bng s liu o c TN h mch MBA ln th nht

Tho dy ra khi mch, lp li mch th nghim c v tin hnh o c thng s ln th 2,

kt qu trong bi bo co l trung bnh cng ca 2 ln o.

U10(V) 40 60 80 100 120 140 160 180 200 220

U20(V)

I10(A)

Cos10

P10(W)

Bng 3.2 - Bng s liu o c TN h mch MBA ln th hai

Kt qu th nghim:

U10(V) 40 60 80 100 120 140 160 180 200 220

U20(V)

I10(A)

Cos10

P10(W)

Bng 3.3 - Bng s liu kt qu TN h mch MBA

i. V li c tnh khng ti U10 = f(I10). So snh dng ca c tnh ny vi dng c tnh thu

c bi th nghim 2. Gii thch s khc nhau nu c?

ii. T cc thng s o c sinh vin hy tnh cc thng s cn thit cho s tng ng

ca my bin p.

TN Bin i nng lng in c Version 1.3

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B. Th nghim ngn mch

S nguyn l:

MBA 1PHA

A1 B1

A2 B2

V1

220VAC

A

V

VARIAC

A

X

a

x

W

A

**

Lp mch th nghim theo s u dy m sinh vin v.

Nh GV n kim tra mch trc khi ng ngun in vo mch.

o v tnh cc thng s theo bng sau:

U1n(V) 40 60 80 100 120 140 160 180 200 220

I2n(A)

I1n(A)

P1n(W)

Bng 3.4 - Bng s liu o c TN ngn mch MBA ln th nht

Tho dy ra khi mch, lp li mch th nghim c v tin hnh o c thng s ln th 2,

kt qu trong bi bo co l trung bnh cng ca 2 ln o

U1n(V) 40 60 80 100 120 140 160 180 200 220

I2n(A)

I1n(A)

P1n(W)

Bng 3.5 - Bng s liu o c TN ngn mch MBA ln th hai

TN Bin i nng lng in c Version 1.3

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Kt qu th nghim:

U1n(V) 40 60 80 100 120 140 160 180 200 220

I2n(A)

I1n(A)

P1n(W)

Bng 3.6 - Bng s liu o c TN ngn mch MBA

i. T cc th nghim ngn mch, sinh vin hy tnh cc thng s cn thit cho s tng

ng ca my bin p.

ii. V ng c tnh U1n = f(I1n). So snh dng ca ng c tnh ny vi ng c tnh

tng ng trong bi 2. Cho nhn xt.

iii. C th quy i tn hao ngn mch t cc th nghim m I1n nh hn dng in nh mc

(5 A) v th nghim ngn mch khi I1n gi tr nh mc c hay khng? Ti sao? Nu

c, sinh vin hy quy i t cc gi tr o c, so snh kt qu thu c. cho nhn

xt.

C. Th nghim c ti

S nguyn l:

V1

220VAC

MBA 1PHA

A1 B1

A2 B2

V

VARIAC

A

X

a

x

A W**

VR

A

V

Lp mch th nghim theo s u dy m sinh vin v.

Nh GV n kim tra mch trc khi ng ngun in vo mch.

iu chnh variac sao cho in p U1 bng in p nh mc v gi in p ny khng

thay i trong sut phn th nghim ny, thay i ti (bng cch bt ni tip cc cng tc

trn hp ti, tng ng vi cc gi tr o trong bi 2).

TN Bin i nng lng in c Version 1.3

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o v tnh cc gi tr theo bng sau:

Ti 1 2 3 4 5 6 7 8 9 10

U2(V)

I2 (A)

U1(V)

I1(A)

Cos1

P1(W)

Cos2

P2(W)

Bng 3.7 - Bng s liu o c TN c ti MBA ln th nht

Tho dy ra khi mch, lp li mch th nghim c v tin hnh o c thng s ln th 2,

kt qu trong bi bo co l trung bnh cng ca 2 ln o.

Ti 1 2 3 4 5 6 7 8 9 10

U2(V)

I2 (A)

U1(V)

I1(A)

Cos1

P1(W)

Cos2

P2(W)

Bng 3.8 - Bng s liu o c TN c ti MBA ln th hai

TN Bin i nng lng in c Version 1.3

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Kt qu Th nghim:

Ti 1 2 3 4 5 6 7 8 9 10

U2(V)

I2 (A)

U1(V)

I1(A)

Cos1

P1(W)

Cos2

P2(W)

Bng 3.9 - Bng s liu o c TN c ti MBA

i. V c tnh ti U2 = f(I2). Tnh st p phn trm cc ti o c. Cho nhn xt.

ii. Sinh vin c kt lun g v s nh hng ca kt cu mch t ln c tnh lm vic ca my bin p

iii. Lp bng so snh My bin p trong bi th nghim th 2 v my bin p trong bi 3 theo yu cu nh sau:

a. Kh nng chu ngn mch (dng in, in p)

b. st p khi my bin p mang ti

c. ng dng ca tng loi MBA vo trong cc lnh vc ca i sng

d. Nhn xt

IV. Yu cu:

- Sinh vin phi hon thnh tt c cc bng s liu, k c bng s liu tnh ton.

- Tng sinh vin trong nhm th nghim np bng s liu cho GVHD.

- Bng s liu v bi chun b c np km theo bi bo co th nghim v cui mi bi bo co.

- Cc bng s liu v bi chun b c chp nhn phi c ch k ca GVHD th nghim ngy hm .

V. Np bo co:

Bo co np tr nht 1 tun sau khi kt thc TN.

Bo co ghi r H tn, MSSV, Nhm, T, ngy thc hin bi TN.

TN Bin i nng lng in c Version 1.3

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Cc kt qu o v kt qu th nghim phi c trnh by r rng, ngn gn v y cc yu cu theo bi hng dn bo co th nghim.

GV c quyn cho im 0 nhng bo co nh sau:

Nhng bi sao chp ln nhau di mi hnh thc.

S liu bo co khng trng khp vi s liu trn bng thu thp s liu ca SV.