Njengoko icandelo wire elidityaniswe phakathi output kunye

Nabani na umsebenzi zigazi edibene nenkonzo yombane, nje kufuneka akwazi ukuba enze indlela ekubalwa ngayo intambo cross-icandelo ngamandla. Ngaphandle oku usenokudibana imeko esele kutshanje xa wamkhomba kumgca umsebenzisi-nkonzo ingasebenziyo ngenxa umonakalo thermal ukuya kumqhubi. Ukuze uphephe oku, kufuneka nje ukukhumbula kusoloko ukuba ubukhulu ucingo kunye namandla zihlobene, kodwa ukwenza izibalo xa kuyimfuneko. Ukukwazi ukukhetha netoti olunqwenelekayo ababhexeshi, kuxhomekeke ukusetyenziswa kwamandla kunokuba luncedo kubomi bemihla ngemihla, umzekelo, ukuba bazikhethele cable-imvelaphi yazo kwibhoyila yombane.

ubungakanani wire, amandla ngoku kuvumelekile

Ekubeni abaninzi ifomula zombane abasakwazi ezintsonkothileyo, abantu abaninzi ngenkankulu weva imfuneko ukwenza naziphi na izibalo, ubone ukuba uyayeka ukuba aqonde ngaphandle koncedo iinjineli amandla kweli candelo. Enyanisweni, ubukhulu ucingo kunye namandla ezinxulumene kuxelela ifomula ezilula. Ingxaki kunciphisa yokuqinisekisa yangoku ubuninzi kunye olunye ukhetho umqhubi nge data reference yoluntu.

theory

Ukusuka School Ikhosi Physics kwakusazeka ukuba elidlulayo ezikhoyo umbandela conductive ukuba ubushushu bayo, leyo ixhomekeke kwindawo somhlathi kunye umqhubi uqwalaselo (kucacile ukuba kwiindawana ezingcakacileyo conductive ngoboya elibaselwe ngumoji ngaphezu kwipleyiti yesinyithi). Ixabiso sangoku abakhoyo onesiphumo, ngamanye ukwandisa iinkqubo zalo ukufudumeza yaqatsela ngakumbi. Masikhumbule ukuba formula yangoku yokubala ombane ezaziwayo ukuxhathisa. It livela umthetho ezaziwa Ohm kwaye kubonakala ngathi mna = U / R, apho U - volts, R - ukuxhathisa in ohms.

Noko ke, bobabini ezinxulumene kweli candelo ucingo, namandla? Ngoko nangoko! Okunye ngokuchanekileyo kulo mzekelo akuthethi ukusebenzisa ingqiqo igunya, namandla (ulwalamano lwabo zizakuboniswa ngezantsi, osukuba esondeza ifomula).

amandla zombane abathengi amaqhina oqhagamshelwano kunye ubungakanani lwangoku ayahamba nombhexeshi. Ngokubanzi, oko kumiselwa ukusuka P ifomula = mna U, apho ndiya - i zangoku amperes. Asazi ithathele ingqalelo iimpawu ngamandla (icandelo esebenzayo okanye izidubuli), kodwa idata thaca wanele zokukhetha kwicandelo wire. Kuhleli eli nqanaba lokugqibela - ukujonga kwindawo cross-wecandelo ongundoqo intambo. ugesi ukukhangela le parameter "yi iliso", kodwa sincoma usebenzisa ifomula elula eya kuthintela iimpazamo kunokwenzeka.

umkhuba

Kunye intambo umqhubi yokwambathisa kufuneka zisuswe, exwebula buvele intsimbi kunye ubukhulu kulinganiswa. Okulandelayo, ixabiso ifunyenwe ukuba endaweni kwi kwifomula S = (3,14 * (d * d)) / 4, apho d - ubudeki in iimilimitha.

Kuhleli ukuthatha isikhokelo (PUE), fumana itafile kunye ehambelana icandelo yangoku kwaye khetha intambo ekunene. Kwakhona ithatha ingqalelo izinto kunye nendlela ngokubekwa emgceni.

Umzekelo Life

Masithi ufuna ukudibanisa kwibhoyila 2 kW ukuya 220 V. Ukusebenzisa ifomula ngasentla for «P», thina bafumane lwangoku, kuya kuba 9 Amps. Kwisitora yeyona ibiza core-ezimbini USB ababhexeshi sobhedu icandelo cross simelwe 0.75 no-1 mm.kv. Vula ulawulo, fumana i "kwiingcingo evulekileyo". -Wire ezimbini cross-kwicandelo 1 mm.kv. Oku uyakwazi ukumelana amps-16 (GOST-80!), Kwaye 0.75 ekwafanekisa 15 A. Phantse ixesha-ezimbini reserve. Ngenxa yoko, kweli umzekelo, ukusetyenziswa kweentambo kunye ababhexeshi zobhedu kubonisiwe eyamkelekileyo kakhulu. Loo nto enxulumene ubungakanani ucingo kunye namandla.