Piv txwv ntawm Cov Lus Nug Sib Tham Txog Transformer
Pendahuluuan
Lub transformer yog ib qho tseem ceeb hauv lub tshuab hluav taws xob, siv los hloov qib voltage. Lub cuab yeej no tseem ceeb heev rau kev xa thiab faib hluav taws xob, kom ntseeg tau tias nws ntws tau zoo los ntawm cov chaw tsim hluav taws xob mus rau cov neeg siv khoom. Hauv tsab xov xwm no, peb yuav tham txog ntau qhov piv txwv ntawm cov teeb meem transformer, uas vam tias yuav pab cov tub ntxhais kawm nkag siab txog cov ntsiab lus yooj yim thiab kev siv cov transformers.
Txoj Cai Ua Haujlwm ntawm Transformer
Hauv cov lus yooj yim, lub transformer muaj ob lub kauj ntawm cov xov hluav taws xob, hu ua thawj thiab thib ob windings, qhwv ib ncig ntawm lub hauv paus hlau uas tsim lub zog sib nqus. Lub kauj thawj zaug tau txais lub zog nkag, thaum lub kauj thib ob tsim lub zog tso zis. Thaum cov hluav taws xob hloov pauv ntws los ntawm lub kauj thawj zaug, lub zog sib nqus raug tsim nyob ib puag ncig lub kauj, ua rau muaj hluav taws xob induced hauv lub kauj thib ob. Qhov piv ntawm tus lej ntawm cov tig ntawm cov kauj thawj zaug thiab thib ob txiav txim siab qhov piv hloov pauv hluav taws xob.
Cov mis yooj yim siv hauv transformers yog:
\[ \frac{V_p}{V_s} = \frac{N_p}{N_s} \]
qhov twg \(V_p \) yog qhov hluav taws xob ntawm lub kauj thawj, \(V_s \) yog qhov hluav taws xob ntawm lub kauj thib ob, \(N_p \) yog tus lej ntawm cov tig ntawm lub kauj thawj, thiab \(N_s \) yog tus lej ntawm cov tig ntawm lub kauj thib ob.
Piv txwv lus nug 1
Lo lus nug:
Ib lub transformer muaj 500 tig ntawm lub winding thawj thiab 100 tig ntawm lub winding thib ob. Yog tias qhov hluav taws xob nkag (thawj) yog 220V, xam qhov hluav taws xob tso tawm (theem ob) ntawm lub transformer.
Kev Sib Tham:
Siv cov qauv yooj yim ntawm transformer:
\[ \frac{V_p}{V_s} = \frac{N_p}{N_s} \]
Peb hloov cov nqi paub:
\[ \frac{220}{V_s} = \frac{500}{100} \]
Ua kom yooj yim rau kev sib piv ntawm tus lej ntawm cov tig:
\[ \frac{220}{V_s} = 5 \]
Yuav nrhiav tau \(V_s\), peb hla kev sib npaug:
\[ V_s = \frac{220}{5} \]
\[ V_s = 44V \]
Yog li, qhov tso zis (theem nrab) voltage ntawm lub transformer yog 44V.
Piv txwv lus nug 2
Lo lus nug:
Ib lub transformer step-up muaj qhov piv ntawm lub winding thawj thiab lub winding thib ob ntawm 1:4. Yog tias lub input voltage yog 110V, lub output voltage ntawm lub winding thib ob yog dab tsi?
Kev Sib Tham:
Siv cov qauv yooj yim ntawm transformer:
\[ \frac{V_p}{V_s} = \frac{N_p}{N_s} \]
Nws paub tias qhov piv ntawm thawj thiab theem nrab tig yog 1: 4, uas txhais tau tias:
\[ \frac{N_p}{N_s} = \frac{1}{4} \]
Nrog \( V_p = 110V \):
\[ \frac{110}{V_s} = \frac{1}{4} \]
Yuav nrhiav tau \(V_s\), peb hla kev sib npaug:
\[ V_s = 110 \times 4 \]
\[ V_s = 440V \]
Yog li, qhov tso zis hluav taws xob ntawm qhov winding thib ob yog 440V.
Piv txwv lus nug 3
Lo lus nug:
Siv lub tshuab hloov hluav taws xob step-down los txo qhov voltage ntawm 240V mus rau 24V. Yog tias muaj 600 tig ntawm lub kauj thawj zaug, muaj pes tsawg tig ntawm lub kauj thib ob?
Kev Sib Tham:
Siv cov qauv yooj yim ntawm transformer:
\[ \frac{V_p}{V_s} = \frac{N_p}{N_s} \]
Muab \( V_p = 240V \), \( V_s = 24V \), thiab \( N_p = 600 \) tig:
\[ \frac{240}{24} = \frac{600}{N_s} \]
Ua kom yooj yim rau kev sib piv voltage:
\[ 10 = \frac{600}{N_s} \]
Yuav nrhiav tau \(N_s\), peb hla kev sib npaug:
\[ N_s = \frac{600}{10} \]
\[ N_s = 60 \]
Yog li, tus naj npawb ntawm cov lem ntawm qhov winding thib ob yog 60 lem.
Piv txwv lus nug 4
Lo lus nug:
Ib lub transformer muaj qhov hluav taws xob nkag (thawj) ntawm 100V thiab qhov hluav taws xob tso tawm (thawj) ntawm 400V. Yog tias tam sim no hauv lub winding thib ob yog 2A, tam sim no hauv lub winding thawj yog dab tsi?
Kev Sib Tham:
Peb siv tau lub hauv paus ntsiab lus ntawm kev txuag hluav taws xob hauv lub transformer zoo tagnrho, qhov twg lub zog nkag yog sib npaug rau lub zog tso zis:
\[ P_p = P_s \]
\[ V_p \times I_p = V_s \times I_s \]
Nrog \( V_p = 100V \), \( V_s = 400V \), thiab \( I_s = 2A \):
\[ 100 \times I_p = 400 \times 2 \]
\[ 100 \times I_p = 800 \]
Yuav nrhiav tau \(I_p\), peb faib:
\[ Ib_p = \frac{800}{100} \]
\[ Kuv_p = 8A \]
Yog li, tam sim no hauv thawj winding yog 8A.
Piv txwv lus nug 5
Lo lus nug:
Ib lub transformer step-up ua rau lub zog hluav taws xob nce ntxiv los ntawm 120V ntawm lub winding thawj mus rau 480V ntawm lub winding thib ob. Yog tias tus naj npawb ntawm kev tig ntawm lub winding thawj yog 300, muaj pes tsawg lub tig ntawm lub winding thib ob?
Kev Sib Tham:
Siv cov qauv yooj yim ntawm transformer:
\[ \frac{V_p}{V_s} = \frac{N_p}{N_s} \]
Muab \( V_p = 120V \), \( V_s = 480V \), thiab \( N_p = 300 \) tig:
\[ \frac{120}{480} = \frac{300}{N_s} \]
Ua kom yooj yim rau kev sib piv voltage:
\[ \frac{1}{4} = \frac{300}{N_s} \]
Yuav nrhiav tau \(N_s\), peb hla kev sib npaug:
\[ N_s = 300 \times 4 \]
\[ N_s = 1200 \]
Yog li, tus naj npawb ntawm cov lem ntawm qhov winding thib ob yog 1200 lem.
Kev kaw
Cov transformers yog cov khoom siv tseem ceeb hauv cov tshuab hluav taws xob, hloov cov theem voltage rau kev xa thiab faib khoom zoo dua. Los ntawm kev nkag siab cov piv txwv uas tau tham, peb vam tias yuav txhim kho peb txoj kev nkag siab txog kev ua haujlwm ntawm transformer thiab yuav ua li cas siv cov ntsiab lus yooj yim hauv kev xam suav nrog transformers. Qhov kev nkag siab no yuav tso cai rau peb nkag siab zoo dua txog cov teebmeem ntawm kev hloov pauv ntawm cov windings thiab voltage rau cov tshuab hluav taws xob.
