Umsebenzi ophambili we-optocoupler kwisekethe yombane kukwenza ukwahlulwahlulwa ngexesha lokuguqulwa kwe-photoelectric kunye nokuthintela ukuphazamiseka okufanayo. Umsebenzi we-disconnector ubonakala kakhulu kwisekethe.
Isignali ihamba kwicala elinye. Ukufaka kunye nokuphuma kuhlukaniswe ngokupheleleyo ngombane. Isignali yokuphuma ayinampembelelo ekungeneni. Amandla aqinileyo okulwa nokuphazamiseka, ukusebenza okuzinzileyo, ukungadibani, ubomi benkonzo ende kunye nokusebenza kakuhle kokudlulisela. I-Optocoupler sisixhobo esitsha esaphuhliswa ngeminyaka yoo-1970. Okwangoku, isetyenziswa kakhulu kwi-electrical insulation, ukuguqulwa kwamanqanaba, ukudibanisa phakathi kwesiteji, isekethe yokuqhuba, isekethe yokutshintsha, i-chopper, i-multivibrator, i-signal isolation, i-interstage isolation, isekethe yokukhulisa i-pulse, isixhobo sedijithali, i-long-distance signal transmission, i-pulse amplifier, isixhobo se-solid-state, i-state relay (SSR), isixhobo, izixhobo zonxibelelwano kunye ne-microcomputer interface. Kwi-monolithic switching power supply, i-linear optocoupler isetyenziselwa ukwenza isekethe ye-optocoupler feedback, kwaye umjikelo womsebenzi utshintshwa ngokulungelelanisa i-control terminal current ukuze kufezekiswe injongo yokulawulwa kwe-voltage ngokuchanekileyo.
Umsebenzi ophambili we-optocoupler ekutshintsheni umbane kukwahlula, ukunika isignali yempendulo kunye nokutshintsha. Umbane we-optocoupler kwisekethe yokuhambisa umbane etshintshayo unikezelwa yi-voltage yesibini ye-transformer ephindaphindayo. Xa i-voltage yokukhupha iphantsi kune-voltage ye-zener, vula i-optocoupler yesignali kwaye wonyuse umjikelo womsebenzi ukuze wonyuse i-voltage yokukhupha. Ngokwahlukileyo koko, ukucima i-optocoupler kuya kunciphisa umjikelo womsebenzi kwaye kunciphise i-voltage yokukhupha. Xa umthwalo wesibini we-transformer ephindaphindayo igcwele kakhulu okanye isekethe yokutshintsha iyasilela, akukho mbane we-optocoupler, kwaye i-optocoupler ilawula isekethe yokutshintsha ukuba ingadlidlizi, ukuze ikhusele ityhubhu yokutshintsha ekutshisweni. I-Optocoupler idla ngokusetyenziswa ne-TL431. Ezi resistors zimbini zisampulwa ngokulandelelana kwi-terminal ye-431r ukuze ithelekiswe ne-comparator yangaphakathi. Emva koko, ngokwesiginali yokuthelekisa, ukumelana komhlaba kwesiphelo se-431k (isiphelo apho i-anode iqhagamshelwe khona ne-optocoupler) kulawulwa, kwaye emva koko ukukhanya kwe-diode ekhupha ukukhanya kwi-optocoupler kulawulwa. (kukho ii-diode ezikhupha ukukhanya kwelinye icala le-optocoupler kunye nee-phototransistors kwelinye icala) amandla okukhanya adlulayo. Lawula ukumelana kwisiphelo se-CE se-transistor kwelinye icala, tshintsha i-chip ye-LED power drive, kwaye ulungise ngokuzenzekelayo umjikelo womsebenzi wesignali yokuphuma ukuze ufezekise injongo yokuzinzisa i-voltage.
Xa ubushushu obujikeleze umhlaba butshintsha ngokukhawuleza, ukushukuma kobushushu be-amplification factor kukhulu, nto leyo engafanele yenziwe yi-optocoupler. I-Optocoupler circuit yinxalenye ebaluleke kakhulu yokutshintsha i-power supply circuit.
Ixesha lokuthumela: Meyi-03-2022