Ongororo ye AC -yemahara LED's Constant Current Control Technology Analysis

AC-yemahara LED yakatadza kudzivirira iyo yakakosha yazvino kudzora tekinoroji kuongorora 1. AC-yemahara LED haisi iyo yakakosha shanduko yemudziyo. Mune mamwe mazwi, iko chaiko hakuna LED chip iyo isina mashandisirwo ekushanda e AC Electric Farm. Iyo AC-yemahara LED yave kuwanikwa ndeye yakanyatso kurongeka mudziyo mune yemukati chipset. Ingori shanduko muchimiro chemukati cheiyo LED mudziyo. Zvechokwadi The level of crafts haisi nyore. Kuunzwa kweAC -yemahara LED inonyanya kutorwa ruzivo rwakaburitswa neSeoul Semiconductor. Zvinogona kuonekwa kuti itsika rectifier bhiriji redunhu kugadzirisa dambudziko rekutaurirana pane inonzi DC LED magetsi emagetsi dambudziko. Zvinoita sekuti bhenefiti ndeyekuti rectifier diode inobviswa, asi reverse kuramba kweLED kunogumira. Kana iyo grid iri muhombe yepamusoro, haisi iyo iyo inobatsira. Nekuti iri kutevedzera rectifier bhiriji redunhu, hafu chete yeazvino inoyerera pane ina bhiriji ruoko, uye iyo DC mutoro unoyerera kuburikidza neazvino yese, zvichikonzera kugovera kwazvino kwekuiswa kwe LEDs muboka rega rega. Uye chiedza chekuburitsa zvakanaka, senge overcurrent kukonzera kuora kwechiedza uye kukanganisa hupenyu. Zviri nyore kupedza. Ingopfupi-dunhu iyo DC LED inobviswa. Nyatsotarisa dunhu, uye ikozvino rave rakanaka uye reverse LEDs muboka rimwe nerimwe. Muchokwadi, haufanirwe kunge wakaomesesa pakutanga. 2. AC-yemahara LED haidzivise yakakosha inogara iripo yekudzora tekinoroji. Kubva pachisumo, mwenje we AC LED hauna kukwirira zvakakwana kupfuura yakajairwa LED. Inonzi ndiyo danho rebudiriro. Munyori anotenda kuti hwaro hweakafanana LED machipi pachawo akafanana. Chinhu chikuru chekudzivirira huwandu hwechiedza pane tile ndiyo yedunhu rudzi rwebhiriji rectifier. Fungidzira kuti boka rimwe chete rema LED rinogona kushanda zvakajairika, richipa kutamba kwakazara kune chiedza, uye 80% yemapoka mana akasara anoshanda mukunyora pasi nemigumisiro yakaipa. Hazvina mhosva kuti ungakura sei nayo, yakadzikira pane iyo yakajairwa nemwenje we LED. Iyo nzira yekuvandudza ndeyekusiya zvisina musoro kugadzirisa bhiriji mugwagwa. Iko hakuna inogara iripo yekudzivirira basa mu AC-yemahara LED. Kana yakashandiswa, inofanira kunge yakabatana nekuyerera kwekudzivirira. Nekudaro, kana yazvino pamuganho wemagetsi emagetsi mashoma, zvinodikanwa kuti ushande mune yakaderera mwenje mhedzisiro mamiriro eiyo iripasi ikozvino kana yakajairika kana yakaderera voltage. Muganho wekudzivirira inzira isina kunaka yekudzivirira. Haisi kungova nezvikanganiso, asiwo kuvimba nekushandiswa kwesimba kushanda, kuitira kuti kushandiswa kwesimba kuderedzwa. Kana iwe uchida kuwedzera PTC kugadzirisa iyo LED inogara iripo dambudziko, iwe hauzive zvakakwana nezvekuita kwechikamu. PTC inonyanya kushandiswa mukudzivirira kwepamusoro uye kudzivirira kwemafuta. Apo ikozvino munharaunda yakakura zvikuru, apo PTC inosvika pakupisa kweimba yekugara mushure mekupisa, kukosha kwekupikisa kunokwira zvakanyanya kune kubviswa. Iyo yekubvisa dunhu muruvara TV inoishandisa kugadzira yakakura ikozvino attenuation vapor. Demagnetic. Kana iyo PTC resistor ichikanganiswa nekupisa kwakapoteredza, tembiricha ichavhurwa kana tembiricha yawedzera kupfuura nzvimbo yekugara, iyo inogona kuita basa mukuchinja kupisa kwekudzivirira. Kana iwe uchida kuvimba neakanaka tembiricha coefficient maitiro ePTC kuramba kune iyo LED inogara iripo yekudzivirira maitiro: Kutanga, iyo PTC kuramba inopfuura yazvino, kune yekudziya nguva yekupisa. Ikozvino yakatokuvadza LED. Chechipiri, iyo inongoerekana yapisa tembiricha yePTC resistor inogona kunyatso kudzora inogara iripo. Zvino kukanganisa kwekushisa kwemamiriro ekunze kwakanyanya uye kuderera kunogona kushandura madhigirii akawanda kuita kuti iyi "constant stream value" ichinje zvisina zvazvinoreva. Zvinogoneka here kuti izvo zvakajairika ma LED zvishandiso zvinogona zvakare kuve nyore kuyerera panguva yazvino yakapusa? Sezvineiwo. Uye kazhinji kutenderera kunogara kuyerera kunonetsa kupfuura DC inogara iripo. Muchokwadi, panogona kuve nemhando dzese dzemhando yepamusoro Chigadzirwa rutsigiro. Panzvimbo pesimba, vagadziri ve LED vanozonyanya kusimba maererano nedunhu tekinoroji, uye zviri nani kuisa pfungwa pakugadzira yakaderera-inodhura uye yakakwirira-light LED zvigadzirwa zvemwenje.