Iifuse ze-PTC, ezikwabizwa ngokuba zii-polyswitches, ziye zaluguqula ukhuseleko lwesekethe kwii-elektroniki zale mihla, zibonelela ngesisombululo esisebenzayo kwii-overcurrents. Iimodeli ezifana ne MF-R050 kunye MF-R185 Ziye zaba yinto eqhelekileyo kuyilo lwe-elektroniki apho ukhuseleko kunye nokuqina zizinto eziphambili. Nangona zixhaphakile, bambalwa abasebenzisi abayiqonda ngokupheleleyo indlela abasebenza ngayo okanye zeziphi izibonelelo abazinikezelayo ngaphezu kweefusi zemveli.
Kulo lonke eli nqaku, siza kuchaza ngokweenkcukacha ukuba yintoni i-PTC fuse, isebenza njani, ukuba ezona modeli zixhaphakileyo zahluka njani, kwaye kutheni zilukhetho oluhle kangaka lokukhusela izixhobo zakho. Ukongeza, siza kubonelela ngombono obanzi wolwazi lobugcisa, imiyalelo yokusetyenziswa, kunye neemeko ezisebenzayo ukuze, xa ugqiba ukufunda, ube nokuzithemba ukukhetha nokusebenzisa la macandelo kwiiprojekthi zakho.
Yintoni iFuse yePTC okanye iPolyswitch?
Igama elithi PTC libhekiselele kudidi lwesixhathisi esonyusa ixabiso laso xa ubushushu bunyuka, kungoko igama laso: I-Positive Temperature Coefficient. Kwimeko yokukhusela isiphaluka, la macandelo abizwa ngokuqhelekileyo Iifayisi zePTC o i-polyswitch. Umsebenzi wayo ophambili ngu ukuphazamisa ukuhamba kwangoku xa idlula amanqanaba athile achazwe kwangaphambili, ngaloo ndlela ukuphepha umonakalo ongakumbi kwisiphaluka.
Ngokungafaniyo neefusi ezisetyenziswa kanye, ii-PTC okanye ii-polyswitches zizixhobo "ezisetwa ngokutsha". Oko kukuthi, xa bebona i-overcurrent, basabela ngokunyusa ngokukhawuleza ukuchasana kwabo kunye nokunciphisa ukuhamba kombane. Nje ukuba imeko eyingozi inyamalale kwaye icandelo lipholile, Ukuchasana kubuyela kwimeko yayo yangaphambili kwaye i-fuse ivumela i-current ukuba ihambe kwakhona.
Oku kuziphatha, ukongeza ekukhuseleni ngokuthembekileyo, igcina iindleko kunye nokugcinwa kwayo ekubeni icandelo akufuneki litshintshwe emva kwesiganeko ngasinye.
Umgaqo wokusebenza we-PTC fuse
Ukusebenza kwe Ifuse yePTC Isekelwe kwi-polymeric material kunye ne-embedded conductive particles. Phantsi kweemeko eziqhelekileyo, Izinto eziphathekayo ziqhuba ngoku kunye nokuchasana okuphantsiNangona kunjalo, ukuba i-current inyuka ngokugqithisileyo (umzekelo, kwimeko yesiphaluka esifutshane), izinto eziphathekayo zitshisa ngenxa yesiphumo seJoule.
Ekufikeleleni kwiqondo lokushisa elibalulekileyo, i-polymer iyanda, ihlula iinqununu ze-conductive kunye nokuphindaphinda ukuchasana.Isiphumo esikhawulezileyo sisithintelo sangoku kumanqanaba akhuselekileyo okanye ukupheliswa okupheleleyo kokuhamba. Ngokuhamba kwexesha, emva kokuba imbangela yokugqithisa iphelile, icandelo lipholisa, izinto zibuyisela isimo sayo, kwaye ukuhamba okuqhelekileyo kwangoku kubuyiselwe.
- Inkqubo izenzekela ngokupheleleyo kwaye ibuyiselwa umva.
- Oku kubenza isisombululo esifanelekileyo sezixhobo ekunzima ukufikelela kuzo okanye zifuna ukuthembeka okuphezulu.
Izinto eziluncedo ngaphezu kwezinye iinkqubo zokukhusela
Ukukhetha ifyuzi ye-PTC ibonelela ngenani leenzuzo ezicacileyo ngaphezulu kweefusi eziqhelekileyo:
- Ukusebenziseka kwakhona: Ifuse ye-PTC ayifuni kutshintshwa emva kokudlula ngokugqithisileyo. I-self-resets xa iimeko zibuyela kwisiqhelo.
- Impendulo ekhawulezayo nezenzekelayo: Ukutshintsha kwemeko ngokukhawuleza xa i-overcurrent isenzeka.
- Ukhuseleko oluqhubekayo: Nangona ingxaki iqhubeka, i-fuse iyanciphisa okwangoku kwaye ikhusela isiphaluka sonke.
- Ugcino lweendleko: Iyanciphisa imfuno yokutshintshwa rhoqo, ngakumbi kwizixhobo ekunzima ukufikelela kuzo.
Iimodeli ezifakiweyo: MF-R050 kunye neMF-R185
Phakathi iifusi zePTC ezidumileyo Sigxininisa ngakumbi iimodeli MF-R050 y MF-R185Omabini angamalungu osapho lwe-MF-R ye-brand ye-Bourns, efumaneka ngokubanzi kwiivenkile ezikhethekileyo zombane.
MF-R050: Iimpawu kunye nokusetyenziswa
I-MF-R050 yi-polymer PTC fuse eyenzelwe imisinga ukuya kwi-0,5A kunye ne-voltage ephezulu ye-60V. Inikezelwa kwiphakheji ye-radial yokufakwa kwebhodi yesekethe eprintiweyo. Umsinga wayo oqhelekileyo wokukhubeka umalunga ne-1 A; oko kukuthi, xa isiphaluka sidlula le yangoku, i-fuse ihamba.
- Ukusetyenziswa rhoqo: Ukusetyenziswa kwizixhobo zombane eziphathwayo, iitshaja, iimotor ezincinci, iithoyi, kunye neenkqubo zokulawula umbane ophantsi. Ubungakanani bayo obubambene buyenza ilungele abathengi bombane.
- Amaxesha okuphendula: Iphendula kwimizuzwana, inciphisa ukuhamba kombane kumanqanaba akhuselekileyo.
MF-R185: Iimpawu kunye nokusetyenziswa
Ngenxalenye yalo, i I-MF-R185 isetyenziswe kwizicelo ezifuna umthamo ophezulu wangoku, kunye nomda oqhelekileyo we-1,85A (kungoko igama). Ikwaxhasa imijikelo emininzi yokuqalisa kunye nokuseta ngokutsha, kwaye iqhele ukufunyanwa kubonelelo lwamandla, abalawuli bamashishini, kunye nezixhobo ezineemfuno zamandla aphakathi aphezulu.
- Izicelo: Izixhobo zolawulo lwemizi-mveliso, izixhobo zombane ezitshintshayo kunye nezixhobo zonxibelelwano.
- Ukomelela ngakumbi: Ukukwazi kwayo ukuphatha imisinga ephezulu kuyenza ifaneleke kwiinkqubo ezithi, nangona ngokuqhelekileyo zisebenza ngokuphantsi, zingafumana i-spikes ezinzima okanye iisekethe ezimfutshane.
Ndiyifakela njani ifuse yePTC kwaye kufuneka ndijonge ntoni?
Ifuse yePTC Ifakwe kwichungechunge kunye nesekethe okanye umthwalo oza kukhuselwa. Iimodeli eziqhelekileyo, ezifana ne-MF-R050 kunye ne-MF-R185, zineetheminali zephini ezifanelekileyo ukufakwa kwiibhodi zeesekethe eziprintiweyo (PCBs). Kubalulekile uku:
- Khetha ukalisho lwangoku olufanelekileyo: Ukuba isixhobo sakho siqhele ukuzoba i-400mA, umzekelo, khetha i-PTC ehamba ngaphezu kwelo xabiso.
- Gcina umda wokhuseleko: Khetha iimodeli ezinobuninzi bombane obuvumelekileyo obungaphezulu kwesekethe.
- Indawo ebonakalayo: Kunconywa ukubeka icandelo kufuphi nombane okanye kwiindawo zokungena ezibalulekileyo.
Ukuba uyathandabuza, soloko ujonga uxwebhu lweenkcukacha zomenzi, oluneenkcukacha zohambo lwangoku, ubambe yangoku, kunye nezinye iiparamitha, kuquka imijikelo yobomi kunye namaqondo obushushu okusebenza.
Ukusebenza kwe-Thermal: intliziyo ye-PTC
Esinye sezitshixo zokuyila a i-polyswitch Nguwe impendulo eshushuXa ukuhamba ngokugqithisileyo ngoku, i-PTC iba shushu kakhulu. Iimvavanyo zeLabhoratri zihlala zibonisa imifanekiso eshushu apho, emva kwesekethe emfutshane, ubushushu bePTC bunokufikelela ngokulula kwi-100 ° C okanye ngaphezulu. Le propati iqinisekisa ukuhamba ngokukhawuleza nokuthembekileyo.
Kwimeko eqhelekileyo, icandelo alifudumezi kwaye livumela ukuhamba kwangoku okungathintelwanga. Nangona kunjalo, ukuba i-current iyanda ngokukhawuleza (umzekelo, ngenxa yokungaphumeleli komlawuli okanye isiphaluka esifutshane kumthwalo), i-PTC iyatshisa, yandisa ukuchasana kwayo, kwaye inciphisa ngokufanelekileyo ukuhamba kombane. Umahluko weqondo lobushushu phakathi kwamazwe aqhelekileyo kunye nokhutshiweyo unokuba ngamadigri angamakhulu aliqela, nto leyo ebonisa ubunzulu bokhuseleko.
Iingqwalasela zokhuseleko kunye nemida enokwenzeka
Nangona kunjalo Iifusi zePTC zibonelela ngokhuseleko olukhulu, kukho imiba ethile ekufuneka ithathelwe ingqalelo:
- Inqaku elilandelayo: Naxa bekhubekile, bavumela umsinga omncinane oshiyekileyo ukuba udlule. Oku akuyongxaki kwizicelo ezininzi, kodwa ezinye izinto eziethe-ethe kakhulu zingonakala ukuba ukuvuza kubalulekile.
- Isantya soBuyiselo: Ixesha elithathayo ukupholisa phantsi kwaye ubuyele kwimeko "eqhelekileyo" kuxhomekeke kubushushu be-ambient kunye noyilo lwesekethe.
- Aluyolo ukutshintshwa ngokupheleleyo kwazo zonke iinkqubo zokhuseleko: Kwiisekethe ezibaluleke kakhulu, kuqhelekile ukudibanisa i-PTC kunye ne-fuses yendabuko okanye iinkqubo ze-electronic cut-off.
Izicelo eziqhelekileyo zobomi bokwenyani
Ukusetyenziswa I-PTC iphinda isetyenziselwe iifusi Iya ixhaphaka ngakumbi kwi:
- Consumer electronics: Ukukhusela iisekethe kwiitshaja, iithoyi, izixhobo zombane ezincinci, kunye nezixhobo eziphathwayo.
- Iimoto: Isetyenziswe ngokubanzi kwiimodyuli ze-elektroniki, ngakumbi kwiimoto zombane kunye ne-hybrid.
- Unxibelelwano kunye nothungelwano: Ukukhusela izixhobo zothumelo, iimodem, kunye neerotha ukusuka kumandla ombane ngengozi.
- Imithombo yamandla: Baqinisekisa ukuthembeka konikezelo lwamandla kunye nezixhobo eziqhagamshelweyo ngokuchasene nokunyuka kwamandla okungalindelekanga.
Ukongezelela, zifakwe kwii-sensors, iinkqubo zokukhanyisa i-LED, kunye naziphi na izixhobo ezifuna ukugcina ukuqhubeka kwenkonzo ngaphandle kwexesha lokuphumla ngenxa ye-fuses evuthelweyo.
Iingcebiso ezisebenzayo zokukhetha kunye nokugcina i-PTC fuse
- Hlala ujonga iphepha lobugcisa: Apho uya kufumana idatha echanekileyo yokubamba okwangoku (ubambe okwangoku) kunye nohambo lwangoku (uhambo lwangoku).
- Khumbula umda wokhuseleko: Musa ukusebenzisa i-PTC enomda ophantsi kakhulu xa kuthelekiswa nesiqhelo sangoku. Ukuba isixhobo sakho siqhele ukusebenza kwi-450mA, khetha imodeli yokuqalisa ephezulu kancinci.
- Qwalasela okusingqongileyo: Kumagumbi anobushushu obuphezulu be-ambient, i-PTC inokuhamba ngaphambi kwexesha kunokuba bekulindelwe.
- Yenza uvavanyo: Phambi kokuphunyezwa kwimveliso, phantsi kwesekethe kwiimeko zehlabathi lokwenyani ukujonga ukusebenza kwefuse.
Okokugqibela, ukuba unamathandabuzo malunga nokuba yeyiphi imodeli onokuthi uyikhethe, abavelisi kunye nabasasazi banikezela ngeengcebiso kunye nezikali zesicelo kusapho ngalunye lwe-PTC. Unokufumana ulwazi apha Uyenza njani iziseko zentsimbi zasekhaya ukubonelela ngokhuseleko olukhulu kunye nokugqunyelelwa kumacandelo kwiiprojekthi ezithile ezikhethekileyo.
Ukusebenza kwe-Thermal: intliziyo ye-PTC
Esinye sezitshixo zokuyila a i-polyswitch Nguwe impendulo eshushuXa ukuhamba ngokugqithisileyo ngoku, i-PTC iba shushu kakhulu. Iimvavanyo zeLabhoratri zihlala zibonisa imifanekiso eshushu apho, emva kwesekethe emfutshane, ubushushu bePTC bunokufikelela ngokulula kwi-100 ° C okanye ngaphezulu. Le propati iqinisekisa ukuhamba ngokukhawuleza nokuthembekileyo.
Kwimeko eqhelekileyo, icandelo alifudumezi kwaye livumela ukuhamba kwangoku okungathintelwanga. Nangona kunjalo, ukuba i-current iyanda ngokukhawuleza (umzekelo, ngenxa yokungaphumeleli komlawuli okanye isiphaluka esifutshane kumthwalo), i-PTC iyatshisa, yandisa ukuchasana kwayo, kwaye inciphisa ngokufanelekileyo ukuhamba kombane. Umahluko weqondo lobushushu phakathi kwamazwe aqhelekileyo kunye nokhutshiweyo unokuba ngamadigri angamakhulu aliqela, nto leyo ebonisa ubunzulu bokhuseleko.
