Umqobo wokhuseleko unciphisa amandla angena kwindawo, oko kukuthi, i-voltage kunye nomda wangoku, ukwenzela ukuba umgca wentsimi awuyi kuvelisa iintlantsi phantsi kwayo nayiphi na imeko, ukwenzela ukuba ayiyi kubangela ukuqhuma.Le ndlela yokumelana nokudubula ibizwa ngokuba kukhuseleko lwangaphakathi.Izithintelo zethu zokhuseleko eziqhelekileyo ziquka izithintelo zokhuseleko ze-zener, izithintelo zokhuseleko lwe-transistor, kunye nezithintelo zokhuseleko ezizimeleyo ze-transistor.Ezi zithintelo zokhuseleko zineenzuzo zazo kwaye zonke zingabancedi kwimveliso yoshishino.Abahleli balandelayo abavela kwi-Suixianji.com baya kwazisa umgaqo wokusebenza kunye nomsebenzi womqobo wokhuseleko, kunye nomahluko kumqobo wokuzihlukanisa.
Umqobo wokhuseleko ligama eliqhelekileyo, elahlulwe laba sisithintelo sokhuseleko se-zener kunye nesithintelo sokhuseleko sodwa, umqobo wokhuseleko ozimeleyo ubizwa ngokuba ngumqobo wokuzihlukanisa.
Indlela umqobo wokhuseleko osebenza ngayo
1. Umgaqo osebenzayo we-signal isolator:
Okokuqala, isibonakaliso somthumeli okanye isixhobo siguqulwa kwaye sitshintshwe ngesixhobo se-semiconductor, kwaye emva koko sohlulwe kwaye siguqulelwe ngesixhobo esinobuthathaka okanye esinovelwano ngemagnethi, emva koko sithotywe kwaye siguqulwe sibuyele kwisiginali yasekuqaleni ngaphambi kokuhlukaniswa, kunye namandla. unikezelo lwesignali eyedwa yodwa ngexesha elinye..Qinisekisa ukuba isignali eguquliweyo, unikezelo lwamandla kunye nomhlaba zizimele ngokupheleleyo.
2. Umgaqo osebenzayo wesithintelo sokhuseleko seZener:
Umsebenzi ophambili wesithintelo sokhuseleko kukukhawulela amandla anobungozi bendawo ekhuselekileyo yokungena kwindawo eyingozi, kunye nokunciphisa i-voltage kunye ne-current ithunyelwe kwindawo eyingozi.
I-Zener Z isetyenziselwa ukunciphisa umbane.Xa i-loop voltage isondele kwixabiso lomda wokhuseleko, i-Zener ivuliwe, ukwenzela ukuba i-voltage kwi-Zener ihlale igcinwe ngaphantsi komda wokhuseleko.I-Resistor R isetyenziselwa ukukhawulela okwangoku.Xa i-voltage inqunyelwe, ukhetho olufanelekileyo lwexabiso lokumelana nalo lunokunciphisa i-loop yangoku ngaphantsi kwexabiso lomda okhuselekileyo wangoku.
Umsebenzi we-fuse F kukuthintela ukungaphumeleli kokunciphisa umbane wesiphaluka ngenxa yetyhubhu ye-zener evuthelwa ngumsinga omkhulu ohamba ixesha elide.Xa i-voltage idlula ixabiso lomda we-voltage ekhuselekileyo isetyenziswe kwisiphaluka, ityhubhu yeZener ivuliwe.Ukuba akukho fuse, i-current ejikelezayo kwi-tube ye-Zener iya kunyuka ngokungapheliyo, kwaye ekugqibeleni i-tube ye-Zener iya kubethwa, ukuze isifumbathiso silahlekelwe umda wayo wombane.Ukuqinisekisa ukuba i-voltage limiter yokunyoba ikhuselekile, i-fuse ivuthela ngokuphindwe kalishumi ngokukhawuleza kunokuba i-Zener inokuvuthela.
3. Umgaqo osebenzayo wesithinteli sokhuseleko sokwahlukaniswa komqondiso ozimeleyo:
Xa kuthelekiswa nesithintelo sokhuseleko se-zener, umqobo wokhuseleko ozimeleyo unomsebenzi we-galvanic isolation ukongeza kwimisebenzi ye-voltage kunye nokunciphisa kwangoku.Umqobo wokuzihlukanisa udla ngokuqulunqwa ngamacandelo amathathu: iyunithi yokunciphisa amandla e-loop, iyunithi yokuhlukanisa i-galvanic kunye neyunithi yokucwangcisa umqondiso.Iyunithi yokunciphisa amandla e-loop yinxalenye engundoqo yomqobo wokhuseleko.Ukongezelela, kukho iisekethe ezincedisayo zokubonelela umbane wokuqhuba izixhobo zentsimi kunye neesekethe zokufumanisa izixhobo zokufumana izixhobo.Iyunithi yokucwangcisa umqondiso yenza ukucwangciswa komqondiso ngokweemfuno zokusebenza komqobo wokhuseleko.
Indima yezithintelo zokhuseleko
Umqobo wokhuseleko sisixhobo sokhuseleko esiyimfuneko kumashishini amaninzi.Ikakhulu ilawula okanye isebenzisa izinto ezinokutsha, ezifana ne-oyile ekrwada kunye ne-oyile ekrwada, utywala, irhasi yendalo, umgubo, njl. njl.Ukhuseleko lweefektri kunye nabantu ngabanye, kuyimfuneko ukuqinisekisa ukuba indawo yokusebenza ayiyi kubangela ukuqhuma.Kwinkqubo yezi zikhuselo, umqobo wokhuseleko udlala indima ebaluleke kakhulu.indima ebalulekileyo,
Umqobo wokhuseleko uphakathi kwegumbi lokulawula kunye nezixhobo ezikhuselekileyo zangaphakathi kwindawo eyingozi.Ikakhulu idlala indima yokukhusela.Nasiphi na isixhobo sombane kwinkqubo yokuvelisa sinokubangela uqhushumbo, iintlantsi ezahlukeneyo, umbane ongatshintshiyo, ubushushu obuphezulu, njl.njl. Zonke azinakuphepheka kwimveliso yefektri, ngoko ke umqobo wokhuseleko ubonelela ngomlinganiselo wokukhusela kwimveliso yeshishini.
Kufuneka kubekho inkqubo ethembekileyo kakhulu yokumisa ngexesha lokufakela, kwaye izixhobo zentsimi ezivela kwindawo enobungozi kufuneka zibe zodwa.Ngaphandle koko, umqondiso awukwazi ukuhanjiswa ngokuchanekileyo emva kokuba uxhunywe emhlabeni, oya kuchaphazela ukuzinza kwenkqubo.
Umahluko phakathi komqobo wokhuseleko kunye nomqobo wokuzihlukanisa
1. Umsebenzi wokuhlukanisa umqondiso
Khusela iluphu yolawulo esezantsi.
Nciphisa impembelelo yengxolo ye-ambient kwisekethe yovavanyo.
Ukucinezela uphazamiseko lwesiseko soluntu, isiguquli sefrikhwensi, ivalve ye-solenoid kunye ne-pulse engaziwayo kwisixhobo;kwangaxeshanye, inemisebenzi yokunciphisa i-voltage kunye nomlinganiselo wangoku kwisixhobo esisezantsi, kubandakanywa i-transmitter, isixhobo, i-frequency converter, i-valve ye-solenoid, i-PLC / i-DCS igalelo kunye nesiphumo kunye nonxibelelwano oluthembekileyo ukhuseleko.
2. Umqobo wokhuseleko olulodwa
Umqobo wokuzihlukanisa: Umqobo wokhuseleko ozimeleyo, oko kukuthi, ukongeza umsebenzi wokuzihlukanisa ngokwesiseko somqobo wokhuseleko, onokuthintela ukuphazamiseka kwe-loop yomhlaba yangoku kwisibonakaliso, kwaye kwangaxeshanye ukhusele inkqubo kwimpembelelo yamandla ayingozi ukusuka indawo.Ngokomzekelo, ukuba i-current enkulu ingena kumgca wentsimi, iya kuphula umqobo wokuzihlukanisa ngaphandle kokuchaphazela i-IO.Ngamanye amaxesha inokuthi iqondwe njenge-isolator ngaphandle komsebenzi wokukhusela ukhuseleko, oko kukuthi, inomsebenzi wokuzihlukanisa kuphela ukukhusela ukuphazamiseka kwesignali kunye nokukhusela inkqubo ye-IO, kodwa ayiboneleli ngesekethe ekhuselekileyo yangaphakathi.Ngezicelo ezingaqhushumbayo.
Yamkela isakhiwo sesekethe esihlukanisa ngombane igalelo, imveliso kunye nonikezelo lwamandla omnye komnye, kwaye ihlangabezana neemfuno zokhuseleko lwangaphakathi ukunciphisa amandla.Xa kuthelekiswa nomqobo wokhuseleko we-Zener, nangona ixabiso libiza kakhulu, iingenelo zayo ezibalaseleyo zokusebenza zizisa inzuzo enkulu kwizicelo zabasebenzisi:
Ngenxa yokusetyenziswa kweendlela ezintathu zodwa, akukho mfuneko yemigca yokumisa inkqubo, ezisa ukukhululeka okukhulu ekuyilweni kunye nokwakhiwa kwendawo.
Iimfuno zezixhobo kwiindawo ezinobungozi ziyancipha kakhulu, kwaye akukho mfuneko yokusebenzisa izixhobo ezizimeleyo kwisayithi.
Ekubeni imigca yesignali ayifuni ukwabelana ngomhlaba, ukuzinza kunye nokukwazi ukuphazamiseka kokubona kunye nokulawula iimpawu ze-loop kuphuculwe kakhulu, ngaloo ndlela kuphuculwe ukuthembeka kwenkqubo yonke.
Isithintelo sokhuseleko esizimeleyo sinamandla okusebenza komqondiso wegalelo elomeleleyo, kwaye inokwamkela kwaye isebenze imiqondiso efana ne-thermocouples, ukuchasana nobushushu, kunye neefrikhwensi, ezingenakukwazi ukwenza lo mqobo wokhuseleko lwe-zener.
Isithintelo sokhuseleko esizimeleyo sinokukhupha izibonakaliso ezimbini ezizimeleyo zokubonelela izixhobo ezibini zisebenzisa umthombo wesignali efanayo, kwaye uqinisekise ukuba izibonakaliso zezixhobo ezibini aziphazamisi omnye komnye, kwaye kwangaxeshanye kuphuculwe ukusebenza kokhuseleko lombane phakathi kwesixhobo esiqhagamshelweyo. izixhobo.
Oku ngasentla malunga nomgaqo wokusebenza kunye nomsebenzi wesithintelo sokhuseleko, kunye nolwazi lomahluko phakathi komqobo wokhuseleko kunye nomqobo wokuzihlukanisa.I-isolator yesignali ngokubanzi ibhekisela kwi-isolator yesignali kwinkqubo yangoku ebuthathaka, ekhusela inkqubo yesignali yezinga eliphantsi kwimpembelelo kunye nokuphazamiseka kwenkqubo yezinga eliphezulu.Umqobo wokuzihlukanisa wesignali udityaniswe phakathi kwesekethe ekhuselekileyo ye-intrinsically kunye ne-non-intrinsically safe circuit.Isixhobo esinciphisa amandla ombane okanye angoku anikezelwe kwisekethe ekhuselekileyo ngaphakathi kuluhlu olukhuselekileyo.
Ixesha lokuposa: Nov-26-2022