Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem

1. Lub transformer muaj ib lub kauj thawj thiab ib lub kauj thib ob nrog tus lej ntawm cov voj voog yog 500 thiab 5000. Lub zog nkag yog 220 V. Lub zog tso zis yog dab tsi?

Paub:

Lub kauj thawj zaug (N _P ) = 500 lub voj voog

Kauj theem ob (N _s ) = 5000 lub voj voog

Lub zog hluav taws xob tseem ceeb (V _P ) = 220 Volts

Xav tau: Qhov hluav taws xob theem ob (V _S )

Tshuaj:

V _s / N _s = V _p / N _p

Vs _/ 5000 = 220 / 500

Vs _/ 5000 = 0.44

Vs ₌ (0.44)(5000)

Vs = ₂₂₀₀ Volt

2. Lub transformer muaj ib lub kauj thawj nrog 1200 lub voj voog thiab ib lub kauj thib ob nrog 1000 lub voj voog. Yog tias tam sim no hauv lub kauj thawj yog 4 Ampere, ces tam sim no hauv lub kauj thib ob yog dab tsi.

Paub:

Lub kauj thawj zaug (N _P ) = 1200 lub voj voog

Kauj theem ob (N _S ) = 1000 lub voj voog

Tam sim no hauv lub kauj thawj zaug (I _P ) = 4 Ampere

Xav tau: Tam sim no hauv kauj theem nrab (I _S )

Tshuaj:

I _S / I _P = N _P / N _S

Tam sim no hauv lub kauj thib ob:

I _S /4 = 1200/1000

I _S /4 = 1.2

Kuv = 1.2 ₍ 4)

I ₌ 4.8 Amperes

3. Lub zog hluav taws xob theem ob yog 220 Volts thiab lub zog hluav taws xob thawj yog 110 volts, ces kev sib piv ntawm lub kauj theem ob thiab lub kauj thawj yog…

Paub:

Qhov hluav taws xob theem ob (V _S ) = 220 Volts

Lub zog hluav taws xob tseem ceeb (V _P ) = 110 Volts

Xav tau: N _S / N _P

Tshuaj:

V _S /V _P = N _S /N _P

220/110 = N _S / N _P

22/11 = N _S / N _P

2/1 = N _S / N _P

12/6 = N _S / N _P

4. Raws li daim duab hauv qab no, qhov hluav taws xob tseem ceeb ntawm lub transformer yog dab tsi.

Paub: Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 1

Qhov hluav taws xob theem ob (V _S ) = 24 Volts

Cov voj voog tseem ceeb (N _P lossis N ₁ ) = 11 N

Cov voj voog thib ob (N _{S lossis} N ₂ ) = 1 N = N

Xav tau: Lub zog hluav taws xob tseem ceeb (V _P )

Tshuaj:

V _s / N _s = V _p / N _p

24 / N = V _p / 11 N

24 / 1 = V _p / 11

24 = V _p / 11

Vp ₌ (24)(11)

V _p = 264 Volt

5. Raws li daim duab hauv qab no, qhov input voltage ntawm lub transformer yog dab tsi.

Paub: Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 2

Lub kauj thawj zaug (N ₁ ) = 21 N

Kauj theem ob (N ₂ ) = 3 N

Qhov hluav taws xob theem ob (V ₂ ) = 20 Volts

Xav tau: Lub zog hluav taws xob tseem ceeb (V ₁ )

Tshuaj:

V ₂ / N ₂ = V ₁ / N ₁

20 / 3 N = V ₁ / 21 N

20 / 1 = V ₁ / 7

20 = V ₁ / 7

V ₁ = (7)(20)

V ₁ = 140 Volt

6. Raws li daim duab hauv qab no, qhov ntau npaum li cas ntawm cov voj voog theem nrab ntawm lub transformer.

Paub: Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 3

Lub zog hluav taws xob tseem ceeb (V _P ) = 220 Volts

Cov voj voog tseem ceeb (N _P ) = 200 lub voj voog

Qhov hluav taws xob theem ob (V _S ) = 1100 Volts

Xav tau: Cov voj voog thib ob (N _S )

Tshuaj:

V _s / N _s = V _p / N _p

1100 Volts / N _s = 220 Volts / 200 lub voj voog

1100 / Ns ₌ 220 / 200

1100 / N _s = 1.1

Ns ₌ 1100 / 1.1

Ns = 1000 lub voj _voog

7. Raws li daim duab hauv qab no, qhov ntau npaum li cas ntawm cov voj voog theem nrab ntawm lub transformer.

Paub: Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 3

Lub zog hluav taws xob tseem ceeb (V _P ) = 220 Volts

Cov voj voog tseem ceeb (N _P ) = 200 lub voj voog

Qhov hluav taws xob theem ob (V _S ) = 1100 Volts

Xav tau: Cov voj voog thib ob (N _S )

Tshuaj:

V _s / N _s = V _p / N _p

1100 / N _S = 220 / 200

1100 / N _S = 22 / 20

1100 / N _S = 1.1

N _S = 1100 / 1.1

N = ₁₀₀₀

Transformer	Np	Ns	Vp	Vs	Ip	Is
1	1000		120	12	0.4	2
2	80	8	20	2		2.5

Raws li lub rooj saum toj no, yog tias qhov ua tau zoo ntawm ob lub transformers zoo ib yam, 50%, Txheeb xyuas Ns _thiab I _p.

Tshuaj:

Cov qauv ntawm kev ua haujlwm ntawm transformer:

Transformers - teeb meem thiab kev daws teeb meem 2

Xam _Ns ntawm lub transformer 1:

Transformers - teeb meem thiab kev daws teeb meem 3

Xam kuv _p ntawm lub transformer 2:

Transformers - teeb meem thiab kev daws teeb meem 4

Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 15

Raws li daim duab saum toj no, cov lus hauv qab no txog daim duab saum toj no, cov lus twg yog qhov tseeb.

A. Daim duab 1 yog lub transformer nce thiab daim duab 2 yog lub transformer nqis

B. Daim duab 1 yog lub transformer step-down thiab daim duab 2 yog lub transformer step-up

C. Cov duab 1 thiab 2 yog cov transformer step-down

D. Cov duab 1 thiab 2 yog lub transformer nce qib

tshuaj

Lub transformer step-up ua haujlwm los tsa lub zog hluav taws xob thaum lub transformer step-down los txo lub zog hluav taws xob. Hauv Daim Duab 1, lub zog hluav taws xob thawj zaug loj dua lub zog hluav taws xob thib ob (20 Volts > 5 Volts) yog li Daim Duab 1 yog lub transformer step-down. Hauv Daim Duab 2, lub zog hluav taws xob thawj zaug me dua lub zog hluav taws xob thib ob (5 Volts < 40 Volts) yog li Daim Duab 2 yog lub transformer step-up.

Cov lus teb yog B.

10.

Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 16

Yog tias lub kauj thawj zaug muaj 800 lub voj voog, ces txiav txim siab lub kauj thib ob.

Paub:

Cov voj voog tseem ceeb = N _p = 800 lub voj voog

Lub zog hluav taws xob tseem ceeb = V _P = 220 Volts

Qhov hluav taws xob theem ob = V _S = 55 Volts

Xav tau: Cov voj voog thib ob (N _S )

Tshuaj:

V _s / N _s = V _p / N _p

55 / Ns ₌ 220 / 800

55 / Ns ₌ 22 / 80

NS = (80)(55) / ₂₂

N _S = 4400 / 22

N _S = 200 lub voj voog

11.

Cov kauj ruam nce thiab nqis transformers - teeb meem thiab kev daws teeb meem 17

Cov lus hais tseeb txog transformers P thiab Q yog ...

A. P yog ib qho transformer step-down vim yog I _s < I _p

B. P yog ib qho step-up transformer vim yog V _p < V _s

C. Q yog ib qho step-up transformer vim yog V _p > V _s

D. Q yog ib qho step-up transformer vim tias kuv _s > kuv _p

tshuaj

P yog lub transformer nce qib vim tias lub zog hluav taws xob thawj zaug (V _p = 110 V) < lub zog hluav taws xob thib ob (V _s = 200 V).

Q yog step-down transformer vim tias qhov hluav taws xob tseem ceeb (V _p = 220 V) > qhov hluav taws xob thib ob (V _s = 110 V).

Cov lus teb yog B.

Lub luag haujlwm tseem ceeb ntawm lub transformer yog dab tsi?
- tebLub luag haujlwm tseem ceeb ntawm lub transformer yog hloov qhov voltage ntawm lub zog hluav taws xob alternating current (AC). Qhov no yog ua los ntawm kev nce (nce-up) lossis txo (nce-down) qhov voltage raws li qhov xav tau ntawm daim ntawv thov.
Cov transformers step-up thiab step-down sib txawv li cas hauv lawv txoj haujlwm?
- tebIb lub transformer kauj ruam nce qhov voltage ntawm lub kauj thawj mus rau lub kauj thib ob, thaum lub transformer kauj ruam qis txo qhov voltage ntawm lub kauj thawj mus rau lub kauj thib ob.
Qhov kev sib raug zoo ntawm tus naj npawb ntawm cov tig hauv cov kauj thawj zaug thiab theem nrab ntawm lub transformer thiab nws qhov kev hloov pauv voltage yog dab tsi?
- teb: Qhov piv ntawm kev hloov pauv hluav taws xob yog sib npaug ncaj qha rau qhov sib piv ntawm kev tig. Yog tias lub kauj thib ob muaj ntau qhov tig dua li lub kauj thawj, nws yog lub tshuab hloov pauv kauj ruam, thiab rov ua dua. Qhov hluav taws xob hauv txhua lub kauj yog sib npaug rau tus lej ntawm kev tig hauv lub kauj ntawd.
Vim li cas thiaj li yuav tsum tau nce qhov voltage rau kev xa hluav taws xob mus deb?
- tebKev nce qib ntawm lub zog hluav taws xob yuav txo qhov tam sim no rau ib lub zog, uas ua rau txo qhov kev poob zog tiv taus hauv cov kab xa xov. Qhov tam sim no qis dua kuj txhais tau tias cov xov hlau nyias dua tuaj yeem siv tau, uas pheej yig dua thiab yooj yim dua rau kev tswj hwm.
Vim li cas cov tsev feem ntau tau txais hluav taws xob ntawm qhov hluav taws xob qis dua li qhov siv rau kev xa hluav taws xob?
- tebCov hluav taws xob siab dua, txawm hais tias zoo rau kev xa hluav taws xob, tab sis muaj kev phom sij rau kev siv hauv tsev. Yog li, ua ntej lub zog hluav taws xob nkag mus rau hauv tsev, cov transformers step-down raug siv los txo cov hluav taws xob kom qis dua rau cov khoom siv hauv tsev thiab cov khoom siv hluav taws xob.
Puas yog lub zog poob thaum hluav taws xob raug hloov los ntawm ib qho voltage mus rau lwm qhov hauv lub transformer?
- tebCov transformers zoo tagnrho yuav tsis muaj kev poob zog, tab sis cov transformers tiag tiag muaj kev poob. Cov kev poob no feem ntau yog vim muaj cua sov tsis kam hauv cov kauj thiab kev poob sib nqus hauv lub plawv. Txawm li cas los xij, cov transformers feem ntau ua haujlwm tau zoo heev, feem ntau siab dua 90-95%.
Qhov tseem ceeb ntawm cov khoom siv transformer core yog dab tsi?
- tebCov khoom siv tseem ceeb ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm zoo thiab kev ua haujlwm ntawm lub transformer. Nws feem ntau yog ua los ntawm hlau lossis ferrite, uas pab coj cov magnetic flux ntawm cov thawj thiab theem nrab coils. Cov khoom ntawm cov khoom siv tseem ceeb cuam tshuam rau lub transformer qhov ua haujlwm zoo, kev poob magnetic, thiab lub peev xwm nqa cov flux yam tsis tau saturated.
Cov transformers puas ua haujlwm nrog cov hluav taws xob ncaj qha (DC)?
- tebTsis yog, cov transformers xav tau qhov hloov pauv ntawm cov hlau nplaum kom ua rau muaj hluav taws xob, uas yog los ntawm kev hloov pauv tam sim no (AC). Nrog rau tam sim no ncaj qha (DC), thaum tam sim no ruaj khov, tsis muaj kev hloov pauv ntawm cov flux, thiab yog li ntawd, tsis muaj hluav taws xob raug ua rau hauv lub kauj thib ob.
Vim li cas thiaj siv tau lub tshuab hloov pauv qis dua hauv cov khoom siv hluav taws xob xws li lub charger?
- tebMuaj ntau yam khoom siv hluav taws xob ua haujlwm ntawm qhov hluav taws xob qis dua li cov khoom siv hauv tsev. Lub transformer step-down hauv lub charger lossis adapter txo qhov hluav taws xob mus rau qib uas haum rau lub cuab yeej, kom ntseeg tau tias nws ua haujlwm zoo thiab muaj kev nyab xeeb.
Cov kev hloov pauv ntawm qhov hnyav (xws li siv ntau dua lossis tsawg dua cov khoom siv) cuam tshuam li cas rau qhov hluav taws xob tso zis ntawm lub transformer?

tebHauv lub transformer zoo tagnrho, kev hloov pauv ntawm qhov hnyav yuav tsis cuam tshuam rau qhov hluav taws xob tso zis. Txawm li cas los xij, hauv cov transformers tiag tiag, vim muaj kev tiv thaiv sab hauv thiab cov tshuaj tiv thaiv, qhov hluav taws xob tso zis tuaj yeem poob me ntsis hauv qab cov xwm txheej siab thiab nce me ntsis hauv qab cov xwm txheej qis.