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Ukumelana ngokulinganisa: ifomula ukubala

Ekusebenteni, wayevame ukubhekana inkinga yokuthola ukungawi babashayeli kanye resistors nge izindlela ezahlukene uxhumano. Isihloko esichaza indlela yokumelana ibalwa ne uxhumano okucishe kufane nalokhu babashayeli namanye yezobuchwepheshe.

umqhubi ukumelana

Zonke babashayeli bathambekele ukugeleza kagesi, ibizwa ngokuthi kagesi ukumelana R, futhi ulinganiswa ohms. Lena impahla eziyisisekelo izinto conductive.

Ukuze silondoloze kagesi resistivity izibalo esebenzayo - ρ Ohm · m / mm 2. Zonke izinsimbi - babashayeli ezinhle, isicelo enkulu wathola ikhopha ne-aluminiyamu, maningi amathuba okuthi ukusebenzisa yensimbi ingasaphathwa. The best umqhubi - esiliva, isetshenziswa e-electrical kanye electronics umkhakha. Alloys Yande nge high value ukumelana.

Lapho kubalwa ukumelana usebenzisa eyaziwa esikoleni physics Yiqiniso ifomula:

R = ρ · l / S, S - endaweni Sectional; l - obuphelele.

Uma sithatha babashayeli ezimbili, ukumelana yabo parallel buzoba buncane ngenxa ukwanda esigabeni Imininingwane.

I kwabantu kwamanje kanye Ukushisa umqhubi

Ukuze esisebenzayo ukubala izindlela babashayeli umqondo osebenza kwabantu kwamanje - δ A / mm 2, it is ebalwe ifomula:

δ = I / S, mina - zamanje, S - sigaba.

Ukudlula yamanje ngokusebenzisa wire heats ke. I δ ephakeme, aba maningi umqhubi uyabaselwa. Sezintambo futhi izintambo yakhelwe amazinga ukuminyana ovumelekile, elizibala le Sae (amakhodi kagesi). has imithetho yayo kwabantu samanje umbhidisi amadivayisi bafudumale.

Uma okungenhla ovumelekile ukuminyana δ singenzeka umqhubi ekubhujisweni, isib, uma okweqile uyabhujiswa ikhebula ukwahlukanisa.

imithetho Ukubalwa ezilungisiwe ukukhiqiza babashayeli ku bafudumale.

Izindlela babashayeli

Noma yimuphi umqhubi kuyinto zibelula kumaSu ebonisa kagesi ukumelana R, base zifundeka futhi sihlaziye lula. Kunezinhlobo ezintathu kuphela yokuxhuma indlela resistances. Indlela yokuqala iyona elula - uxhumano serial.

Isithombe esibonisa ukuthi ukumelana Imininingwane: R = R 1 + R 2 + R 3.

Eyesibili indlela iyinkimbinkimbi kakhulu kunalokho - uxhumano ngokulinganisa. Ukubalwa ukumelana in uxhumano parallel wenziwa ngezigaba. Kubalwa Imininingwane conductivity G = 1 / R ke inani ukumelana R = 1 / G.

Futhi ungaqhubeka ehlukile, kuqala kukhompyutha ukumelana Imininingwane ngesikhathi uxhumano parallel we resistors R1 R2, bese obukwenza, futhi ukuthola R.

Indlela yesithathu enkompolo nzima kakhulu - kwakwakhe okuxubile, isb khona zonke izinketho icatshangelwe. Isikimu kuboniswa esithombeni.

Ngenxa yalesi sibalo kufanele lula wesifunda, lokhu esikhundleni resistors-R2 no-R3 eyodwa R2,3. wesifunda Simple is eyatholakala.

Manje singakwazi ukubala ukumelana uxhumano okufanayo, formula okuyinto:

R2,3,4 = R2,3 ·-R4 / (R2,3 +-R4).

Ukushayela kuba lula nakakhulu, kukhona resistors kokuba uxhumano serial. Ngo ngaphezulu izimo eziyinkimbinkimbi, sebenzisa ukuguqulwa indlela efanayo.

izinhlobo babashayeli

Esikhathini izimpahla ezisebenza ngogesi, ekukhiqizeni wesifunda amabhodi ezinyathelisiwe, babashayeli amelela izicezu zethusi ucwecwe. Ngenxa ubude encane ukumelana banayo kancane nabo ezimweni eziningi kungenziwa dengwane. Ngenxa yalezi babashayeli parallel uxhumano ukumelana kuyehla ngenxa lenyuka cross-section.

Ingxenye enkulu babashayeli kuthiwa emazombezombe wire. Lakhicitwe nge diameters ezahlukene - ukusuka amamilimitha angu 0.02 5.6. Ukuze ephezulu amandla transformers kanye motors ekhiqizwa zethusi shank we unxande cross kwesigaba. Kwesinye isikhathi ukukhanda elikhulu ububanzi wire esikhundleni parallel eziningana ezincane axhunyiwe.

Ingxenye ekhethekile babashayeli kukhona izintambo futhi izintambo, imboni inikeza ehlukahlukene yasakazwa lemikhiqizo for ezihlukahlukene izidingo. Ngokuvamile kudingekile ukuba esikhundleni ikhebula eyodwa ku kwesigaba eziningana ezincane. Izizathu zalokhu zihluke kakhulu, isibonelo, intambo cross-ingxenye 240 mm 2 kunzima kakhulu elala phansi emgwaqeni ne egoba emaweni. Wakhe esikhundleni nge 2 × 120 mm 2, futhi inkinga isixazululekile.

Ukubalwa Ukushisa izintambo

Umqhubi ukufuthelana ngu egeleza zamanje uma izinga lokushisa yayo idlula ovumelekile, ukubhujiswa ukwahlukanisa kwenzeka. Sae ukubala inikeza babashayeli Ukushisa, idatha yoqobo ngenxa kungenzeka izimo zamanje kanye nezemvelo lapho umqhubi selibekiwe. Kulezi idatha kusuka amatafula akhethiwe Sae Kunconywa umqhubi kwesigaba (izintambo noma izintambo).

Ngo umkhuba, kunezimo lapho IBamba umthwalo phezu ikhebula zanda kakhulu. Kunezindlela ezimbili phandle kukhona - esikhundleni ikhebula ngakolunye uhlangothi, kuyabiza, noma parallel yalala omunye wehlise ikhebula main. Kulokhu, ukumelana umbhidisi uxhumano parallel kuyehla, ngaleyo ndlela uwela exotherm.

Ukuze ukhethe isigaba kwesokudla ikhebula yesibili, sebenzisa ithebula EMP, kubalulekile ukuba kube iphutha nge kwencazelo yokusebenza sayo samanje. Kulesi simo, Ukupholisa ikhebula liyoba ngcono ngisho nakakhulu kunalokho elilodwa. Kunconywa ukubala ukumelana uxhumano okucishe kufane nalokhu izintambo ezimbili, ukuchaza kangcono ukushisa yabo.

Ukubalwa babashayeli ekulahlekeni voltage

Lapho indawo n umthengi R ngesikhathi L ibanga kusuka amandla supply U 1 kwenzeka elikhulu voltage iconsi phezu izintambo umugqa. K R N umthengi uthola voltage U 2 U kakhulu ngezansi eyodwa kokuqala. Cishe njengoba umthwalo izenzo ezahlukene imishini kagesi exhunywe kwi-umugqa ngokulinganisa.

Ukuze kuxazululwe le nkinga umkhiqizo ukumelana ukubala ngokuqondene okucishe kufane nalokhu yonke imishini, ngakho R umthwalo ukumelana n. Ngaphezu kwalokho, kufanele ichaze izintambo ukumelana umugqa.

L R = ρ · 2l / S,

Lapha, S - wire umugqa kwesigaba, mm 2.

Okulandelayo kumugqa wamanje kunqunywa: Mina = U 1 / (R L + R m). Manje, ngokwazi wamanje sokunquma voltage iconsi phezu izintambo umugqa: U = mina · R L. Esemgwaqweni iphesenti yayo U 1.

U% = (I · R L / U 1) · 100%

Inani Kunconywe U% - akukho kuka-15%. Izibalo okunikeziwe esebenzayo yiluphi uhlobo zamanje.

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