Amafuse e-PTC, aziwa nangokuthi ama-polyswitches, aguqule ukuvikelwa kwesekethe kuma-electronics wesimanje, ahlinzeka ngesixazululo esisebenzayo kuma-overcurrents. amamodeli afana ne MF-R050 futhi i MF-R185 Sezivamile emiklamo ye-elekthronikhi lapho ukuphepha nokuqina kuyizinto eziza kuqala. Nakuba zivamile, abasebenzisi abambalwa abaqonda ngokugcwele ukuthi basebenza kanjani noma yiziphi izinzuzo abazinikezayo ngaphezu kwamafusi endabuko.
Kuso sonke lesi sihloko, sizochaza ngokuningiliziwe ukuthi iyini ifuse ye-PTC, ukuthi isebenza kanjani, ukuthi amamodeli ajwayelekile ahluka kanjani, nokuthi kungani eyinketho enhle kangaka yokuvikela amadivayisi akho. Ngaphezu kwalokho, sizohlinzeka ngemininingwane ebanzi yolwazi lwezobuchwepheshe, imiyalelo yokusetshenziswa, nezimo ezingokoqobo ukuze, lapho uqeda ukufunda, ube nesibindi sokukhetha nokusebenzisa lezi zingxenye kumaphrojekthi akho.
Iyini i-PTC fuse noma i-Polyswitch?
Igama elithi PTC libhekisela ohlotsheni lwesivimbeli esinyusa inani laso lapho izinga lokushisa likhuphuka, yingakho igama laso: I-Positive Temperature Coefficient. Esimweni sokuvikelwa kwesifunda, lezi zingxenye zivame ukubizwa Ama-fuse e-PTC o i-polyswitch. Umsebenzi wayo oyinhloko phazamisa ukuhamba kwamandla uma idlula amazinga athile achazwe ngaphambilini, ngaleyo ndlela ugwema umonakalo owengeziwe kumjikelezo.
Ngokungafani nama-fuse avamile okusetshenziswa ngakunye, ama-PTC noma ama-polyswitches angamadivayisi "asethwa kabusha". Okusho ukuthi, lapho zibona i-overcurrent, zisabela ngokukhuphula ngokuqinile ukumelana kwazo nokunciphisa ukugeleza kukagesi. Lapho isimo esiyingozi sesinyamalala futhi ingxenye iphola, Ukumelana kubuyela esimweni sayo sokuqala futhi i-fuse ivumela i-current ukuthi igeleze futhi.
Lokhu kuziphatha, ngaphezu kokuvikela okuthembekile, yonga izindleko nokunakekelwa njengoba ingxenye ayidingi ukushintshwa ngemva kwesigameko ngasinye.
Umgomo wokusebenza wefuse ye-PTC
Ukusebenza kwe-a I-PTC fuse Isekelwe entweni ye-polymeric enezinhlayiya ezishunyekiwe zokuqhuba. Ngaphansi kwezimo ezijwayelekile, Impahla iqhuba okwamanje ngokumelana okuphansiKodwa-ke, uma i-current ikhula ngokweqile (isibonelo, esimweni sokujikeleza okufushane), impahla iyashisa ngenxa yomphumela we-Joule.
Lapho ifinyelela izinga lokushisa elibucayi, i-polymer iyanda, ihlukanisa izinhlayiya ze-conductive futhi iphindaphinde ukumelana.Umphumela osheshayo uwumkhawulo wamanje wamaleveli aphephile noma ukucishe kuphele ukugeleza. Ngokuhamba kwesikhathi, lapho imbangela yokusetshenziswa ngokweqile isiqediwe, ingxenye iyaphola, impahla iphinde ibe nesimo sayo, futhi ukugeleza kwamanje okuvamile kubuyiselwa.
- Inqubo izenzakalela ngokugcwele futhi iyabuyiseleka emuva.
- Lokhu kubenza babe yisixazululo esiphelele samadivayisi okunzima ukuwafinyelela noma adinga ukwethembeka okuphezulu.
Izinzuzo ngaphezu kwezinye izinhlelo zokuvikela
Ukukhetha ifuse ye-PTC kunikeza izinzuzo eziningi ezicacile ngaphezu kwamafuse avamile:
- Ukusebenziseka kabusha: Ifuse ye-PTC ayidingi ukushintshwa ngemva kwe-overcurrent. Iyazisetha uma izimo zibuyela kwesijwayelekile.
- Impendulo esheshayo nezenzakalelayo: Ukushintsha kwesimo kwenzeka ngokushesha lapho kwenzeka i-overcurrent.
- Ukuvikelwa Okuqhubekayo: Ngisho noma inkinga iqhubeka, i-fuse ibeka umkhawulo wamanje futhi ivikela wonke umjikelezo.
- Ukonga izindleko: Inciphisa isidingo sokushintshwa njalo, ikakhulukazi kumishini okunzima ukuyifinyelela.
Amamodeli afakiwe: MF-R050 kanye ne-MF-R185
Phakathi kwe amafuse e-PTC aziwa kakhulu Sigqamisa ikakhulukazi amamodeli MF-R050 y MF-R185Bobabili bangamalungu omndeni wakwa-MF-R we-Bourns brand, etholakala kabanzi ezitolo ezikhethekile ze-electronics.
MF-R050: Izici nokusetshenziswa
I-MF-R050 iyifuse ye-polymer PTC eyenzelwe imisinga efika ku-0,5A kanye ne-voltage enkulu engu-60V. Ihlinzekwa ngephakheji ye-radial yokukhwezwa kwebhodi lesekethe eliphrintiwe. Umthamo wayo ojwayelekile wokukhubeka cishe u-1 A; okungukuthi, lapho isifunda sidlula lesi samanje, i-fuse iyahamba.
- Izinhlelo zokusebenza ezisetshenziswa kakhulu: Sebenzisa kumadivaysi e-elekthronikhi aphathwayo, amashaja, izinjini ezincane, amathoyizi, namasistimu okulawula amandla aphansi. Ubukhulu bayo obuhlangene buyenza ilungele izinto zikagesi zabathengi.
- Izikhathi zokuphendula: Iphendula ngemizuzwana, ikhawulela ukuhamba kukagesi kumazinga aphephile.
MF-R185: Izici nokusetshenziswa
Ngokwengxenye yayo, i I-MF-R185 isetshenziswa ezinhlelweni ezidinga umthamo wamanje ophezulu, ngomkhawulo ojwayelekile ongu-1,85A (yingakho igama). Iphinde futhi isekele imijikelezo embalwa yokuqalisa nokusetha kabusha, futhi ivame ukutholakala ezintweni zikagesi, izilawuli zezimboni, namadivayisi anezidingo zamandla aphezulu.
- Izicelo: Imishini yokulawula izimboni, ukushintshanisa amandla kanye nemishini yezokuxhumana.
- Ukuqina okukhulu: Ikhono layo lokusingatha imisinga ephakeme liyenza ifanelekele amasistimu okuthi, nakuba ngokuvamile esebenza ngaphansi kwamanje, angase abe nama-spikes aqinile noma amasekhethi amafushane.
Ngiyifaka kanjani ifuse ye-PTC futhi yini okufanele ngiyibheke?
I-Fuse ye-PTC Ifakwe ochungechungeni ngesekethe noma umthwalo okufanele uvikelwe. Amamodeli avamile, njenge-MF-R050 kanye ne-MF-R185, afaka amatheminali amaphini afanele ukufakwa kumabhodi esekethe aphrintiwe (ama-PCB). Kubalulekile ukuthi:
- Khetha isilinganiso esifanele samanje: Uma idivayisi yakho ngokuvamile idonsa u-400mA, isibonelo, khetha i-PTC ehamba ngaphezu kwalelo nani.
- Gcina imajini yokuphepha: Khetha amamodeli ama-voltage awo aphezulu avumelekile adlula awesekhethi.
- Indawo engokoqobo: Kunconywa ukuthi ubeke ingxenye eduze nogesi noma ezindaweni zokungena ezibalulekile.
Uma ungabaza, hlala uhlola ishidi lezici zomkhiqizi, elinemininingwane yohambo lwamanje, ibamba lwamanje, namanye amapharamitha, okuhlanganisa umjikelezo wempilo namazinga okushisa okusebenza.
Ukusebenza okushisayo: inhliziyo ye-PTC
Esinye sezihluthulelo zokuklama a i-polyswitch ngeyakho impendulo eshisayoUma kugeleza kakhulu kwamanje, i-PTC ishisa kakhulu. Ukuhlolwa kwaselabhorethri kuvame ukubonisa izithombe ezishisayo lapho, ngemva kokujikeleza okufushane, izinga lokushisa le-PTC lingafinyelela kalula ku-100°C noma ngaphezulu. Lesi sakhiwo siqinisekisa ukuhamba okusheshayo nokuthembekile.
Esimeni esijwayelekile, ingxenye ayishisi futhi ivumela ukugeleza kwamanje okungakhawulelwe. Kodwa-ke, uma i-current ikhuphuka ngokuzumayo (isibonelo, ngenxa yokuhluleka komlawuli noma isifunda esifushane emthwalweni), i-PTC iyashisa, ikhulise ukumelana kwayo, futhi ikhawulela ngokuphumelelayo ukugeleza kagesi. Umehluko wezinga lokushisa phakathi kwezifunda ezivamile nezinqunyiwe ungaba amadigri angamakhulu amaningana, okubonisa ukushuba kwesivikelo.
Ukucatshangelwa kokuphepha kanye nemikhawulo engenzeka
Noma Amafuse e-PTC anikeza ukuvikeleka okukhulu, kunezici ezithile okufanele zicatshangelwe:
- I-Corriente de Fuga: Ngisho noma bekhubeka, basavumela umsinga omncane osele ukuba udlule. Lokhu akuyona inkinga ezinhlelweni eziningi, kodwa ezinye izingxenye ezithambile zingalimala uma ukuvuza kubalulekile.
- Isivinini sokutakula: Isikhathi esisithathayo ukupholisa nokubuyela esimweni "esivamile" sincike kuzinga lokushisa elizungezile kanye nomklamo wesekethe.
- Akuwona ukushintshwa ngokuphelele kwawo wonke amasistimu okuvikela: Kumasekhethi abalulekile, kuvamile ukuhlanganisa i-PTC namafusi endabuko noma amasistimu anqamule kagesi.
Izinhlelo zokusebenza ezijwayelekile zokuphila kwangempela
Ukusetshenziswa kwe Amafuse asetha kabusha e-PTC Kuya ngokuya kuvame ku-:
- I-Consumer electronics: Ukuvikela amasekhethi kumashaja, amathoyizi, izinto zikagesi ezincane, namagajethi aphathekayo.
- Ezezimoto: Isetshenziswa kakhulu kumamojula kagesi, ikakhulukazi ezimotweni zikagesi nezehybrid.
- Ezokuxhumana namanethiwekhi: Ukuvikela imishini yokudlulisa, amamodemu, namarutha ekuqhumeni kwamandla ngengozi.
- Imithombo yamandla: Ziqinisekisa ubuqotho bokunikezwa kwamandla kanye namadivayisi axhunyiwe ngokumelene nokukhuphuka kwamandla okungalindelekile.
Ngaphezu kwalokho, ahlanganiswa nezinzwa, amasistimu okukhanyisa i-LED, nanoma iyiphi into edinga ukugcinwa kwesevisi ukuqhubeka ngaphandle kwesikhathi sokuphumula ngenxa yamafuse aphephethiwe.
Amathiphu asebenzayo wokukhetha nokugcina i-PTC fuse
- Hlala ubheka ishidi lobuchwepheshe: Lapho uzothola imininingwane eqondile yokubamba okwamanje (bamba okwamanje) kanye nohambo lwamanje (lwamanje lohambo).
- Khumbula imajini yokuphepha: Ungayisebenzisi i-PTC enomkhawulo ophansi kakhulu uma uqhathaniswa nowamanje ojwayelekile. Uma idivayisi yakho ngokuvamile isebenza ku-450mA, khetha imodeli yokuqhumisa ephakeme kancane.
- Qaphela imvelo: Emakamelweni anamazinga okushisa e-ambient aphezulu, i-PTC ingase ihambe ngaphambi kwesikhathi kunokulindelekile.
- Yenza izivivinyo: Ngaphambi kokuqalisa ekukhiqizweni, beka isekethe kuzimo zomhlaba wangempela ukuze ubuke ukusebenza kwefuse.
Okokugcina, uma unokungabaza mayelana nokuthi iyiphi imodeli ongayikhetha, abakhiqizi nabasabalalisi banikeza izincomo nezikali zohlelo lokusebenza kumndeni ngamunye we-PTC. Ungathola nolwazi ku Indlela yokwenza izisekelo zensimbi ezenziwe ekhaya ukuhlinzeka ngokuvikeleka okukhulu kanye nokwahlukanisa izingxenye kwamanye amaphrojekthi akhethekile.
Ukusebenza okushisayo: inhliziyo ye-PTC
Esinye sezihluthulelo zokuklama a i-polyswitch ngeyakho impendulo eshisayoUma kugeleza kakhulu kwamanje, i-PTC ishisa kakhulu. Ukuhlolwa kwaselabhorethri kuvame ukubonisa izithombe ezishisayo lapho, ngemva kokujikeleza okufushane, izinga lokushisa le-PTC lingafinyelela kalula ku-100°C noma ngaphezulu. Lesi sakhiwo siqinisekisa ukuhamba okusheshayo nokuthembekile.
Esimeni esijwayelekile, ingxenye ayishisi futhi ivumela ukugeleza kwamanje okungakhawulelwe. Kodwa-ke, uma i-current ikhuphuka ngokuzumayo (isibonelo, ngenxa yokuhluleka komlawuli noma isifunda esifushane emthwalweni), i-PTC iyashisa, ikhulise ukumelana kwayo, futhi ikhawulela ngokuphumelelayo ukugeleza kagesi. Umehluko wezinga lokushisa phakathi kwezifunda ezivamile nezinqunyiwe ungaba amadigri angamakhulu amaningana, okubonisa ukushuba kwesivikelo.
