Pese patinotaurirana nevatengi, izwi rimwe rinotaurwa kakawanda: waranti. Mutengi wega wega anoda imwe waranti nguva, kubva pamakore maviri kusvika kumakore matatu, uye vamwe vanoda makore mashanu.
Asi chaizvoizvo, muzviitiko zvakawanda, vatengi pachavo vangave vasingazivi kuti nguva iyi yewaranti inotorwa kupi, kana kuti vanongotevera boka revanhu uye vanofunga kuti ma LED anofanira kuvimbiswa kwenguva yakareba kudaro.
Nhasi, ndichakupinza munyika ye LED kuti uone kuti hupenyu hwemarambi hunotsanangurwa uye hunotongwa sei.
Chekutanga, kana zvasvika kune maLED, maererano nechitarisiko, tinogona kutaura nekutarisa kuti akasiyana kubva kune echinyakare mwenje masosi, nekuti anenge ese maLED ane chinhu chakasiyana -singi yekupisa.
Kupisa kwakasiyana-siyana hakusi kwekunaka kwemarambi e LED, asi kuita kuti ma LED ashande zviri nani.
Ipapo vatengi vanozoshamisika kuti nei mwenje wekare masosi asingawanzo shandisa radiators, asi munguva ye LED anenge ese marambi anoshandisa radiators?
Nokuti yapfuura chiedza manyuko aivimba inopisa nemwaranzi kubudisa chiedza, akadai tungsten filament marambi, ayo anovimba kupisa kuti abudise chiedza, saka havatyi kupisa. Iyo yakakosha chimiro che LED ndeye semiconductor PN junction. Kana tembiricha yakakwira zvishoma, kushanda kwekushanda kunoderera, saka kupisa kupisa kwakakosha kune LED.
Kutanga, ngatitarisei kuumbwa uye schematic diagiramu ye LED
Mazano: Iyo LED chip inoburitsa kupisa kana ichishanda. Isu tinoreva tembiricha yemukati yayo yePN junction seyejoni tembiricha (Tj).
Uye, zvinonyanya kukosha, hupenyu hwemarambi e LED hune hukama zvakanyanya nekudziya kwejunction.
Pfungwa yatinofanira kunzwisisa: Kana tichitaura nezve hupenyu hwe LED, hazvireve kuti haichashandiswi zvachose, asi kana chiedza che LED chinobuda chasvika 70%, isu tinowanzofunga kuti 'hupenyu hwayo hwapera'.
Sezvingaonekwa kubva pamufananidzo uri pamusoro, kana tembiricha yejunction ichidzorwa pa105 ° C, ipapo kupenya kunopenya kwemwenje we LED kunoderedza kusvika ku70% kana mwenje we LED uchishandiswa kwemaawa anenge 10 000; uye kana tembiricha yejunction ichidzorwa panenge pa60 ° C, ipapo nguva yayo yekushanda ichave inenge 100,000 maawa + awa, iyo inopenya inoyerera ichaderera kusvika 70%. Hupenyu hwemwenje hunowedzerwa negumi.
Muhupenyu hwezuva nezuva, zvatinowanzosangana nazvo ndezvekuti hupenyu hwe LED hurefu hwemaawa 50,000, inova iyo data kana tembiricha yejunction ichidzorwa pa85 ° C.
Sezvo tembiricha yekusangana ichiita basa rakakosha muhupenyu hwemarambi e LED, sei kuderedza tembiricha yekusangana? Usanetseka, ngatitangei kutarisa kuti mwenje unobvisa sei kupisa. Mushure mekunzwisisa nzira yekupisa kupisa, iwe unozoziva wega nzira yekudzikisa tembiricha yejunction.
Marambi anobvisa sei kupisa?
Kutanga, iwe unofanirwa kuziva nzira nhatu dzakakosha dzekufambisa kupisa: conduction, convection, uye radiation.
Nzira huru dzekufambisa dzeradiator ndeye conduction uye convection heat dissipation, uye nemwaranzi kupisa kupisa pasi pechisikigo convection.
Nheyo dzekutanga dzekutamisa kupisa:
Kuitisa: Mafambiro anoita kupisa pachinhu kubva pachikamu chinodziya kuenda pane chinotonhorera.
Ndezvipi zvinhu zvinokonzera kupisa conduction?
① Thermal conductivity yezvinhu zvinopisa kupisa
② Thermal resistance inokonzerwa nekupisa kwekupisa chimiro
③ Chimiro uye saizi yezvinhu zvinopisa zvinopisa
Radiation: Chiitiko chepamusoro-tembiricha zvinhu zvinoburitsa kupisa zvakananga kunze.
Ndezvipi zvinhu zvinokanganisa mwaranzi yekupisa?
① Kupisa kwekupisa kwenzvimbo yakapoteredza uye yepakati (kunyanya kufunga nezvemhepo)
② Hunhu hweiyo thermal radiation material pachayo (kazhinji mavara akasviba anopenya zvine simba, asi kutaura zvazviri kutamisa mwaranzi hakuna kunyanya kukosha, nekuti tembiricha yemwenje haina kunyanya kukwira uye mwaranzi haina kusimba zvakanyanya)
Convection: Nzira yekufambisa kupisa nekuyerera kwegasi kana mvura.
Ndezvipi zvinhu zvinokanganisa convection yekupisa?
① Gasi kuyerera uye kumhanya
② Yakanyanya kupisa huwandu, kumhanya kwekuyerera uye huwandu hwemvura
Mune marambi e LED, sink yekupisa inotora chikamu chikuru chemutengo wemwenje. Nokudaro, maererano nekugadzirwa kwe radiator, kana zvinhu uye zvigadzirwa zvisina kunaka zvakakwana, ipapo mwenje uchava nematambudziko akawanda mushure mekutengesa.
Nekudaro, muchokwadi, aya angori kufanofananidzira, uye iko zvino ndiko kutariswa.
Semutengi, unotonga sei kuti kupisa kwerambi kwakanaka here kana kuti kwete?
Iyo yakanyanya hunyanzvi nzira ndeye kushandisa nyanzvi midziyo yekuitisa jena tembiricha yekuyedza.
Zvakadaro, midziyo yehunyanzvi yakadai inogona kurambidza vanhuwo zvavo, saka chasara chete kushandisa nzira yechinyakare yekubata mwenje kuti tinzwe tembiricha.
Ipapo mubvunzo mutsva unomuka. Zviri nani here kunzwa kupisa kana kwete?
Kana radiator ichipisa paunoibata, haina kunaka.
Kana radiator ichipisa kubata, iyo inotonhorera system inofanira kunge yakaipa. Ingave iyo redhiyeta haina kukwana kupisa kupisa simba uye kupisa kwechip hakugone kubviswa nenguva; kana nzvimbo inobudirira yekupisa kupisa haina kukwana, uye pane zvikanganiso mukugadzirwa kwemaitiro.
Kunyangwe kana mwenje wemuviri usingapise kubata, hazvina hazvo kunaka.
Kana mwenje we LED uchishanda nemazvo, radiator yakanaka inofanirwa kunge ine tembiricha yakaderera, asi inotonhorera radiator haisi iyo yakanaka.
Iyo chip haiburitse kupisa kwakawanda, inoita zvakanaka, inobvisa kupisa kwakakwana, uye hainzwe kupisa zvakanyanya muruoko. Iyi yakanaka yekutonhodza sisitimu, iyo chete "yakaipa" ndeyekuti ishoma yekurasa zvinhu.
Kana pane kusvibiswa pasi pe substrate uye pasina kushamwaridzana kwakanaka nekupisa kunyura, kupisa hakuzobudiswi kunze uye kuchaunganidza pane chip. Kubata kunze hakusi kupisa, asi chip mukati chave kutopisa zvakanyanya.
Pano, ndinoda kukurudzira nzira inobatsira - "hafu yeawa yekuvhenekera nzira" yekuona kana kupisa kwekupisa kwakanaka.
Cherechedza: "Hafu-awa yekuvhenekera nzira" inobva kuchinyorwa
Hafu yeawa nzira yekuvhenekera:Sezvatakambotaura, kazhinji sezvo tembiricha ye LED inokwira, iyo inopenya inoyerera inoderera. Zvadaro, chero bedzi isu tichiyera shanduko mukuvhenekera kwerambi rinopenya panzvimbo imwe chete, tinogona kukanganisa kuchinja kwekushisa kwejunction.
Kutanga, sarudza nzvimbo isingavhiringidzwi nechiedza chekunze uye vhenekera mwenje.
Mushure mekuvhenekera, pakarepo tora mita yemwenje woiyera, semuenzaniso 1000 lx.
Chengetedza nzvimbo yemwenje uye mita yekuvhenekera isina kuchinjwa. Mushure mehafu yeawa, shandisa mita yekuvhenekera kuyera zvakare. 500 lx zvinoreva kuti mwenje unopenya wadonha ne50%. Mukati munopisa zvakanyanya. Kana iwe ukabata kunze, zvichiri zvakanaka. Zvinoreva kuti kupisa hakuna kubuda. Musiyano.
Kana iyo yakayerwa kukosha iri 900 lx uye kuvhenekera kunongodonha ne10%, zvinoreva kuti i data yakajairika uye kupisa kwekupisa kwakanaka kwazvo.
Kuwanda kwekushandiswa kwe "hafu yeawa yekuvhenekera nzira": Isu tinonyora iyo "inopenya flux VS junction tembiricha" shanduko yemachipi akati wandei anowanzo shandiswa. Kubva pane ino curve, isu tinogona kuona kuti mangani malumens iyo inopenya flux yadonha, uye isu tinogona zvisina kunanga kuziva kuti mangani madhigirii Celsius tembiricha yejunction yakwira kusvika.
Chikamu chekutanga:
Kune OSRAM S5 (30 30) chip, iyo inopenya inoyerera yakadonha ne20% kana ichienzaniswa ne25 ° C, uye tembiricha yejunction yakapfuura 120 ° C.
Column two:
Kune OSRAM S8 (50 50) chip, iyo inopenya inoyerera yakadonha ne20% kana ichienzaniswa ne25 ° C, uye tembiricha yejunction yakapfuura 120 ° C.
Chikamu chechitatu:
Kune OSRAM E5 (56 30) chip, iyo inopenya inoyerera yakadonha ne20% kana ichienzaniswa ne25 ° C, uye tembiricha yejunction yakapfuura 140 ° C.
Chikamu chechina:
Kune iyo OSLOM SSL 90 chena chip, iyo inopenya inoyerera i15% yakaderera pane iyo pa25 ° C, uye tembiricha yejunction yakapfuura 120 ° C.
Chikamu chechishanu:
Luminus Sensus Serise chip, iyo inopenya inoyerera yakadonha ne15% kana ichienzaniswa ne25 ℃, uye tembiricha yejunction yakapfuura 105 ℃.
Sezvinoonekwa kubva pamifananidzo iri pamusoro, kana kuvhenekera munzvimbo inopisa kudonha ne20% mushure mehafu yeawa kana ichienzaniswa neinotonhora, tembiricha yejunction yakapfuura iyo yekushivirira huwandu hwechip. Zvinogona kutongwa kuti iyo yekutonhora system haina kukodzera.
Ehe, iyi ndiyo yakawanda yemakesi, uye zvese zvine kunze, sezvakaratidzwa mumufananidzo:
Ehe, kune mazhinji maLED, tinogona kushandisa nzira yehafu yeawa yekuvhenekera kutonga kuti yakanaka here kana kwete mukati mekudonha kwe20%.
Wakadzidza here? Paunosarudza marambi mune ramangwana, unofanira kuteerera. Iwe haugone kungotarisa kutaridzika kwemwenje, asi shandisa maziso ako akapinza kusarudza mwenje.
Nguva yekutumira: May-24-2024
