Kutheni ndidinga i-“0 Ohm Resistor”?

I-0 Ohm resistor yi-resistor ekhethekileyo ekufuneka isetyenziswe kwinani lezicelo.Ke, sikwinkqubo yoyilo lwesekethe okanye sihlala sisetyenziselwa isichasi esikhethekileyo.I-0 ohm resistors zikwabizwa ngokuba yi-jumper resistors, yinjongo ekhethekileyo yokumelana nexabiso, i-0 ohm resistors resistance value ayingo-zero (leyo yi-superconductor ezomileyo izinto), kuba kukho ukuxhathisa ixabiso, kodwa kananjalo kunye ne-resistors ye-chip eqhelekileyo inempazamo efanayo. ukuchaneka kwesi salathisi.Abavelisi be-Resistor banamanqanaba amathathu okuchaneka kwe-0-ohm chip resistors, njengoko kuboniswe kuMfanekiso 29.1, okuyi-F-file (≤ 10mΩ), i-G-file (≤ 20mΩ), kunye ne-J-file (≤ 50mΩ).Ngamanye amazwi, ixabiso lokumelana ne-0-ohm resistor lingaphantsi okanye lilingana ne-50 mΩ.kungenxa yendalo ekhethekileyo ye-0-ohm resistor ukuba ixabiso layo lokumelana nokuchaneka liphawulwe ngendlela ekhethekileyo.ulwazi lwesixhobo se-0-ohm resistor iphawulwe ngale parameters, njengoko kuboniswe kumzobo.

Sihlala sibona i-ohm resistors kwi-circuits, kunye ne-novices, idla ngokudideka: ukuba i-resistor ye-0 ohm, i-wire, ngoko kutheni uyibeke?Kwaye ngaba i-resistor enjalo iyafumaneka kwimarike?

1. Umsebenzi we-1.0 ohm resistors

Ngapha koko, i-0 ohm resistor iseluncedo.Mhlawumbi kukho imisebenzi emininzi ngolu hlobo lulandelayo.

a.Iza kusetyenziswa njengocingo lokutsiba.Oku kokubili kuthandeka ngobuhle kwaye kulula ukuyifaka.Okokuthi, xa sigqibezela isiphaluka kwi-design yokugqibela, inokuthi ikhutshwe okanye ifutshane, apho i-resistor ye-0-ohm isetyenziswe njenge-jumper.Ngokwenza oku, kunokwenzeka ukuba uphephe utshintsho lwePCB.Okanye thina ibhodi yesekethe, kunokufuneka senze uyilo oluhambelanayo, sisebenzisa i-ohm resistors ukufezekisa ukuba kunokwenzeka iindlela ezimbini zokudibanisa isiphaluka.

b.Kwiisekethe ezixubileyo ezifana nedijithali kunye ne-analogue, kudla ngokufuneka ukuba izizathu ezimbini kufuneka zihluke kwaye zixhunywe kwindawo enye.Endaweni yokudibanisa amabala amabini ngokuthe ngqo kunye, sinokusebenzisa i-ohm resistor ukudibanisa izizathu ezimbini.Inzuzo yale nto kukuba umhlaba uhlukaniswe ube ngamanethiwekhi amabini, okwenza kube lula ukuphatha xa ubeka ubhedu kwiindawo ezinkulu, njl. Kwaye sinokukhetha ukuba sifutshane iinqwelomoya ezimbini zomhlaba okanye cha.Njengenqaku elisecaleni, ezo zihlandlo ngamanye amaxesha zidityaniswa nee-inductors okanye amaso amagnetic njl.njl.

c.Ngeefusi.Ngenxa ye-fusing ephezulu yangoku yolungelelwaniso lwePCB, kunzima ukuxuba xa kuthe kwakho i-short-circuit overcurrent kunye nezinye iimpazamo, ezinokukhokelela kwiingozi ezinkulu.Njengoko i-0 ohm resistor yangoku umthamo wokumelana ubuthathaka ngokwentelekiso (enyanisweni, 0 ohm resistor kwakhona ukuxhathisa ethile, nje encinane kakhulu), overcurrent uya kuqala 0 ohm resistor idityanisiwe, ngaloo ndlela ukwaphula isekethe, ukuthintela ingozi enkulu.Ngamanye amaxesha ama-resistors amancinci anokumelana ne-zero okanye i-ohm ezimbalwa nazo zisetyenziswa njenge-fuses.Nangona kunjalo, oku akukhuthazwa, kodwa abanye abavelisi basebenzisa oku ukugcina iindleko.Oku akusebenzi ngokukhuselekileyo kwaye kunqabile ukuba kusetyenziswe ngale ndlela.

d.Indawo ebekelwe ukugunyaziswa.Unokwenza isigqibo sokuba uyifake okanye ungayifaki, okanye amanye amaxabiso, njengoko kufuneka.Ngamanye amaxesha ikwaphawulwa ngo-* ukubonisa ukuba ixhomekeke kulungiso lweempazamo.

e.Isetyenziswa njengesekethe yoqwalaselo.Oku kusebenza ngokufanayo kwi-jumper okanye i-dipswitch, kodwa igxininiswe ngokuthengisa, ngaloo ndlela ithintela ukuguqulwa okungahleliwe kobumbeko ngumsebenzisi oqhelekileyo.Ngokufakela i-resistors kwiindawo ezahlukeneyo, kunokwenzeka ukutshintsha umsebenzi wesiphaluka okanye usethe idilesi.Ngokomzekelo, inombolo yenguqu yezinye iibhodi ifunyenwe ngeendlela eziphezulu kunye nezisezantsi, kwaye sinokukhetha i-0 ohms ukuphumeza utshintsho lwamanqanaba aphezulu kunye aphantsi kweenguqulelo ezahlukeneyo.

2. Amandla e-0 Ohm Resistors

Inkcazo ye-0 Ohm resistors yahlulwe ngokubanzi ngamandla, njenge-1/8W, 1/4W, njl. Itheyibhile idwelisa isakhono sangoku esihambelana neepakethe ezahlukeneyo ze-0-ohm resistors.

0 Ohm Resistor yangoku yesakhono ngePackage

3. Inqaku elinye lomhlaba kwi-analogue kunye nomhlaba wedijithali

Logama nje ziyimihlaba, kufuneka ekugqibeleni zidityaniswe kunye kwaye emva koko emhlabeni.Ukuba awuxhunyiwe kunye "ngumhlaba ojikelezayo", kukho ukuhluka koxinzelelo, kulula ukuqokelela intlawulo, okubangelwa umbane omileyo.Umhlaba yireferensi ye-0 enokwenzeka, zonke ii-voltages zithathwe kumhlaba wereferensi, umgangatho womhlaba kufuneka uhambelane, ngoko ke zonke iintlobo zomhlaba kufuneka zifutshane ziqhagamshelwe kunye.Kukholelwa ukuba umhlaba uyakwazi ukufunxa zonke iintlawulo, uhlala uzinzile kwaye yeyona ndawo iphakamileyo yereferensi yomhlaba.Nangona ezinye iibhodi zingaqhagamshelwanga emhlabeni, isityalo samandla siqhagamshelwe emhlabeni kwaye amandla avela kwibhodi ekugqibeleni abuyela kwisityalo samandla emhlabeni.Ukuqhagamshelanisa i-analogue kunye nemigangatho yedijithali ngokuthe ngqo enye kwenye kwindawo enkulu kuya kukhokelela ekuphazamisekeni omnye komnye.Hayi uxhumano olufutshane kwaye alufanelekanga, isizathu njengoko ngasentla, sinokusebenzisa ezi ndlela zine zilandelayo ukusombulula le ngxaki.

a.Idityaniswe namaso kazibuthe: Isekethe elinganayo yamaso kazibuthe ilingana ne-band resistance limiter, enefuthe elibalulekileyo lokucinezela ingxolo kwindawo ethile, kwaye ifuna uqikelelo lwangaphambili lwe-frequency yengxolo xa isetyenziswa ukuze khetha imodeli efanelekileyo.Kwiimeko apho i-frequency ingaqinisekanga okanye ingalindelekanga, amaso amagnetic awangeni.

b.Idityaniswe yi-capacitor: i-capacitor eyodwa nge-AC, ephumela kumhlaba odadayo, ayinakufezekisa umphumo wokulingana okulinganayo.

c.Uqhagamshelwano kunye nee-inductors: ii-inductors zinkulu, zineeparamitha ezininzi ezilahlekileyo kwaye azinzanga.

d.Uqhagamshelo lwe-ohm resistor: Uluhlu lwe-impedance lunokulawulwa, i-impedance iphantsi ngokwaneleyo, akuyi kubakho ndawo ye-resonance frequency point kunye nezinye iingxaki.

4. 0 Ohm resistor njani derating?

I-0 Ohm resistors ngokuqhelekileyo iphawulwe kuphela ngokulinganiswa okuphezulu kwangoku, kunye nokuchasana okuphezulu.Inkcazo yokuhla iqhelekile yeyokuxhathisa okuqhelekileyo, kwaye ayifane ichaze indlela yokunciphisa i-0 ohm resistors ngokwahlukeneyo.Singasebenzisa uMthetho we-Ohm ukubala ukuchasana okuphezulu kwandiswe ngumbane olinganisiweyo we-0 Ohm resistor, umzekelo, ukuba i-current rated i-1A kunye nokumelana okuphezulu ngu-50mΩ, ngoko siqwalasela umbane ophezulu ovunyelwe ukuba ube ngu-50mV.Nangona kunjalo, kunzima kakhulu ukuvavanya i-voltage yokwenyani ye-0 Ohm kwiimeko zokusetyenziswa okusebenzayo, kuba i-voltage incinci kakhulu, kwaye ngenxa yokuba isetyenziselwa ukukhawuleza, kwaye umahluko wombane phakathi kweziphelo ezimbini zexesha elifutshane uyaguquguquka.

Ngoko ke, ngokuqhelekileyo siyenza lula le nkqubo ngokusebenzisa i-50% ethe ngqo ye-derating yangoku ehleliweyo yokusetyenziswa.Umzekelo, sisebenzisa i-resistor ukudibanisa iinqwelomoya ezimbini zamandla, unikezelo lwamandla yi-1A, ngoko siqikelela ukuba umbane wombane kunye ne-GND yi-1A, ngokuhambelana nendlela elula yokunciphisa esisandula ukuyichaza, khetha i-2A. 0 ohm resistor ngokufutshane.