Continuous cable yangoku: ubuchwepheshe umthwalo

Xa ombane line cable uzibiza zicwangciswe umthwalo yangoku kwangaphambili. Le mfuneko ukusebenza zobugcisa imithetho enxulumene kunye yokugquma ubushushu phantsi koxinzelelo oluqhubekayo. Ukuba cable kuvumelekile yangoku eqhubekayo idlula ixabiso kumda, apho kuya kubakho nobushushu kunye nokonakaliswa umaleko ubushushu umonakalo yoko. Ngoko ke, lo umthwalo ikhethiwe ukuze ngaphandle ingozi ukuthotywa thermal esibekwa ubushushu.

Isizathu zokufudumeza cable

Isixa ubushushu eyenziwe ngexesha ukusebenza intambo siyinikwe:

- Q = I ² YE W / cm, apho ndiya - nomsinga umthwalo, A; n - inani imicu; R - Resistance, ohms.

kufuneka ibe Ibinzana ngasentla, kungona wangoku womzobo kwi ufakelo lombane, abaqhagamshelwe intambo, kungona yokugqibela itshiswa. Apho amandla dissipated ngemithambo ngohlobo ubushushu, lisisikweri wolayisho.

Ubushushu ukusasaza evela intambo ukusebenza

ukufudumeza of cable kuya kuqhubeka kukhula ngenxa yokuba ubushushu ukuba aye kwindawo ethile. Apho imali kuxhomekeke umahluko phakathi intambo kunye lobushushu nokusingqongileyo. Ekugqibeleni lizama, yaye iqondo lobushushu izinikezeli lube sisigxina.

Indlela ukubala amandla avumelekile iqondo lobushushu zokufudumeza ephilileyo yangoku

Xa umthwalo ubushushu uba olulingana nesixamali ubushushu dissipated yi intambo, imo yokusebenza iba izinzile:

- P = θ / ΣS = ( t _x - t _cp) / (ΣS), apho θ - umahluko lobushushu phakathi undoqo kunye nokusingqongileyo, ⁰ C; _w - t _cp - lobushushu ithambeka, ⁰ C; ΣS - RTD cable.

Ubushushu ushiye intambo inkulu ngcono conductivity medium. Intambo eqhubekayo ngoku ibalwa ngolu hlobo lulandelayo: I _Dop = √ ((t _ext - t _CP) / (RnΣS)), apho t i _extra owayehlala lobushushu zokufudumeza avumelekile (ngokuxhomekeke kuhlobo USB).

iimeko ubushushu

Best zonke, transfer ubushushu kwenzeka xa le ntambo emanzini. Ukuba iyafakwa emhlabeni, ukususwa ubushushu kuxhomekeke ukwakhiwa yokugqibela kunye nesiqulatho sokufuma. In izibalo ngokuqhelekileyo uthabathe loo resistivity of the r lomhlaba = 120 ohms ∙ K / W, okuhambelana ukuya kumhlaba esantini-udongwe ezinomthamo sokufuma 12-14%. Ukuze ufumane Ufundo echanekileyo kubalulekile ukwazi ubume bomhlaba, ekubeni uxhathiso ziyohluka kakhulu kwaye kwiitheyibhile. Kuyenzeka ukuba ukunciphisa utshintsho ekwakhiweni wokugcwalisa eluthangweni lweenqwelo zokulwa kunye intambo kunye tamping ngenyameko. nesanti misindo kunye uhlalutye babe conductivity thermal ngaphantsi koko ngodongwe. Ngoko ke, ukuzaliswa cable ukuvelisa udongwe okanye obambe ukungaqukathi SLAG, kobutyobo kunye namatye.

Cable ebanjwe emoyeni, kukho transfer ubushushu olihlwempu. Oku kube kubi xa ezibekiweyo amajelo USB, apho kukho umaleko umoya ezongezelelweyo, ukufudumeza efanayo kweentambo ezikufuphi neendonga yokunganyangeki. Kuba Kwiimeko ezinjalo, i yangoku umthwalo elikhethwe njenge ezincinane kangangoko kunokwenzeka.

Ukuqinisekisa iimeko obushushu ezifanelekileyo nokusebenza umgca cable yangoku umthwalo avumelekile ukuba iindlela ezimbini ukuya kufunyanwa: ukhuseleko kunye elide. Ngeempawu iintambo kwakhona ixabiso obushushu avumelekile ngexesha short circuit, apho yokugquma iphepha 200 ⁰ C, kunye PVC - 120 ⁰ C.

intambo rhoqo yangoku bomzimba umlinganiselo ukuba bokuxhathisa kwaye nobushushu yayo amandla thermal yokusingqongileyo.

Kuyimfuneko ukuba luthathele ingqalelo ukuba ngokuhamba kwexesha kwandisa conductivity le yokugquma intambo ngenxa owomileyo. ukumelana umhla- 70% yexabiso lilonke na izibalo izigqibo umthwalo iyonke.

Iitafile yokuqingqa ngoku avumelekile

ESL babale ngesandla, kunzima ukumisela intambo obuvumelekileyo eqhubekayo ngoku. PUE ziqulathe itheyibhile ezizodwa, apho amaxabiso zakhe iimeko ezahlukeneyo yokusebenza. Ngezantsi eliphezulu ngokuvunywe data umthwalo abaliweyo zeesayizi ezahlukeneyo umqhubi ubhedu kubushushu yayo 90 ⁰ C kunye okukufutshane 45 ⁰ C.

Esebenzisa iintambo, ogama iimpawu zinikwe Table maza nokuhambisa lombane uthungelwano ombane ngqo kunye nokuxuba kwaye kufakelo zokubhala. Azikwazi ukumelana imikhosi eqine enkulu babekwa emhlabeni, ngaphandle, xa imigudu intambo. Imisonto elide lobushushu avumelekile 70 ⁰ C, yaye xa kukho elifutshane yesekethe - hayi ngaphezulu kwe 160 ⁰ C imizuzwana-4. Kwimo zonxunguphalo zokufudumeza obuvumelekileyo ababesele ayidluli 80 ⁰ C.

Iimpawu abaqhubi ziyahluka ngaphakathi kwemida ububanzi, ngokuxhomekeke nokumakisha, inani umphakathi kunye nezinye iparameters. Continuous VVG Intambo ngoku kuxhomekeke kwicandelo emnqamlezweni, nto leyo umiselwa mali kunye nohlobo lokuphila. Hi xikombiso, le ndawo iphezulu somhlathi of cable owodwa 240 ^mm2, kwaye i-wire ezintlanu - 50 mm ^2.

Continuous ngophatho AVVG intambo ngokwecandelo kuchaziwe leyo lilikhulu kancinci nje ucingo VVG, ekubeni lenziwe aluminium. Iqondo lobushushu kunye likaxakeka yokusebenza nokusebenza kuvumelekile iindidi zombini kuyafana.

AVBbShv cable inomsebenzisi - inokusetyenziswa kwiindawo ezinobungozi kunye pozhaproopasnyh ngenxa yobukho umcu isikrweqe double. Oku kwande ekwakhiweni. Continuous ngophatho AVBbShv USB, kwakunye iimveliso ezidlulileyo kuxhomekeke amaqondo obushushu, nto leyo mayingabi ngaphezu 75 ⁰ C., nto leyo noko ngaphezulu. Kuchazwa kwi tafile kwaye kuxhomekeke kwicandelo emnqamlezweni kunye nendlela ngokubekwa.

isiphelo

Ukuze Ukuxabisa umthwalo pripostoyannoy ayenziwanga nge welding, kufuneka sithathe i yangoku gqolo ukususela iitafile intambo ze ibale ukusasaza ubushushu kokusingqongileyo. Akulunganga ukukhetha cable sikhokelele nobushushu nentshabalalo umaleko ubushushu, nto leyo iza kuqulatha ndingungantweni imveliso kwexesha.