Sideen u dhimi karaa LED-ka anigoo isticmaalaya PWM?

Si aad u khafiifiso LED-ka leh PWM, waxaad u baahan doontaa PWM-kaar LED-ka iyo kontaroole soo saari kara calaamada PWM. Kuwa soo socda ayaa ah tillaabooyinka lagu khafiifinayo LED-ka PWM: 1. Dooro darawalka LED-ka ee taageeraya dhimista PWM: Hubi in dareewalka LED-ka ee aad dooratay uu taageerayo dhimista PWM oo uu ku habboon yahay LED-ka aad doonayso inaad isticmaasho. 2. Dooro kontaroolaha PWM: Dooro kontaroolaha PWM ee awooda in uu dhaliyo calaamada PWM ee ku haboon darawalka LED-ka ee aad dooratay. Ku dheji darawalka LED-ka iyo kontaroolaha PWM sida soo socota: Ku xidh wax-soo-saarka PWM-ga wax-soo-saarka dareewalka LED-ka. Had iyo jeer u hoggaansan nidaamka fiilooyinka ee ay bixiso soo saaraha darawalka LED. 4. Go'aami wareegga shaqada: Wareegga waajibaadku waa saamiga wakhtiga uu calaamadda PWM " shidsan yahay." Iftiinka LED-ka waxaa lagu go'aamiyaa wareegga shaqada. Wareegga waajibka weyni wuxuu soo saaraa LED iftiimaya, halka wareegga shaqada hoose uu soo saaro LED-gaaban. Adigoo isticmaalaya kontaroolaha PWM, u deji wareegga waajibaadka heerka dhalaalka la rabo. 5. Tijaabi oo hagaaji: Si aad u hesho heerka dhalaalka ee loo baahan yahay, tijaabi LED-ga oo hagaaji wareegga shaqada hadba sida loogu baahdo. Dimming LED leh PWM waxay ka dhigan tahay xulashada darawal LED ah oo ku habboon iyo kontaroolaha PWM, si habboon ugu xira iyaga, beddelaadda wareegga waajibaadka, ka dibna tijaabinta iyo wax ka beddelka illaa heerka dhalaalka la rabo laga helayo.

Xakamaynta LED ee hufan: Sahaminta PWM Dimming

By Martin Wan
La cusboonaysiiyay: March 27, 2023

Nalalka LED-ka ayaa si weyn loo isticmaalaa sababtoo ah waxtarkeeda, adkeysiga, iyo cimriga dheer. Mid ka mid ah waxyaabaha ugu dhibka badan ee ku saabsan ka faa'iidaysiga LED-yada waa xakamaynta dhalaalkooda. Halkan, bakhtiyaynta PWM ayaa khusaysa. xakamaynta LEDs PWM dimming waa hab lagu xakameeyo dhalaalka LED iyadoo la beddelayo ballaca garaaca wadnaha ee hadda korantada. Dimming PWM ayaa noqonaysa mid aad loo jecel yahay sida hab wax ku ool ah oo wax ku ool ah oo lagu xakameynayo nalalka LED.

Waa maxay PWM dimming?

Awoodda PWM ee lagu xakameynayo aaladaha kala duwan ee goob kasta oo elektiroonigga ah ayaa inta badan mas'uul ka ah isticmaalkeeda baahsan ee warshadaha elektiroonigga ah ee casriga ah. Calaamadaha PWM waxaa loo isticmaalaa in lagu yareeyo LED-yada, lagu xakameeyo matoorada, iyo in lagu socodsiiyo qalab koronto oo kala duwan. Haddaba, waa maxay shaqada habka PWM?

PWM waa hab lagu dhimo celceliska awoodda la bixin karo ee signalka korantada. Intaa waxaa dheer, habraaca waxaa lagu dhammeeyaa iyadoo si guul leh loo kala saarayo calaamadda qaybaheeda. Marka la eego shaqada, beddelka u dhexeeya rarka iyo isha ayaa laga yaabaa in si degdeg ah loo damiyo loona damiyo si loo habeeyo celceliska hadda iyo danabka la keeno rarka.

Marka la beddelo tirada wakhtiga calaamaduhu sarreeyo (ON) ama hooseeya (OFF), PWM waxay u oggolaanaysaa iftiin ballaaran (OFF). Si ka duwan dimming analoogga, kaas oo dila LED-yada beddelka awoodda wax soo saarka, calaamadda PWM waxay noqon kartaa mid shidan ama dami hal mar, taasoo la macno ah in LED-yadu ay heli doonaan koronto buuxda ama koronto la'aan (ie, bixinta 10V halkii ay ka ahaan lahayd 12V dhalaalka beddela).

Waa maxay Dhimista Joogtada ah ee Joogtada ah (CCR)?

The hoos u dhac joogto ah oo hadda jira Farsamadu waxay bixisaa socodka joogtada ah ee LED-ka (CCR). Si ka duwan habka PWM, kaas oo xaaladda LED-ku ay u dhexeyso shid iyo damin, LED-ku si joogto ah ayuu u shidan yahay. Hase yeeshee, waxaa laga yaabaa inaad xakamayso iftiinka LED-ka adiga oo hagaajinaya ama beddelaya heerarka hadda jira adoo isticmaalaya CCR.

Faa'iidooyinka Habka Dimming CCR:

Ku habboon codsiyada fog-fog ee u baahan dhererka siliga dheer iyo qeexitaannada EMI adag.
Darawalada CCR waxay leeyihiin xaddidaadyo koronto oo ka sarreeya (60V) marka loo eego darawallada PWM (24.8 V). Tilmaamahani waxay khuseeyaan darawallada Heerka 2 ee UL-shahaadad u leh isticmaalka deegaan qoyan iyo qalalan labadaba.

Faa'iido darrada Habka Dimming CCR:

Jiilka iftiinka aan joogtada ahayn ee LED-yada ee qulqulka aadka u hooseeya ayaa ka dhigaya habka CCR mid aan habboonayn codsiyada u baahan hoos u dhigista 10% ee dhalaalka ugu badan. Gabagabadii, waxqabadka LED-ka ee ay soo saartay habkan heerarkan hadda jira waa mid hoose.
Wadista hoose ee hadda jirta waxay keentaa midab aan is waafaqsanayn.

PWM oo ah Signal Dimming

Aynu balaadhino fahamkeena hadda ee habaynta ballaca garaaca wadnaha. Hadda, PWM waa in loo aqoonsadaa calaamad ahaan.

Calaamadaha habaynta ballaca garaaca wadnaha waxay ka kooban yihiin taxanaha garaaca garaaca-mawjada-wareega leh (PWM). Waxa jira meelaha ugu sarreeya iyo dooxooyinka qaabka mawjada ee calaamad kasta. Waqtiga-waqtiga-ku-oolka ah waa marka xoogga calaamaduhu uu sarreeyo, halka wakhtiga ka baxsan yahay marka xoogga calaamaduhu hooseeyo.

Cycle Duty

Meertada waajibaadku waa marka calaamaduhu ku sii jiri karaan sare ee fikradda mugdiga. Sidaa darteed, calaamaduhu waxay leeyihiin wareegga waajibaadka 100% haddii ay had iyo jeer shidmaan. Calaamadaha PWM ee wakhtiga ku habboon waa la hagaajin karaa. Marka wareegga waajibaadka PWM loo dejiyo 50%, calaamaduhu wuxuu socdaa 50% wakhtiga iyo 50% off.

Frequency

Hababka ballaca garaaca garaaca wadnaha (PWM) inta jeer ee calaamaduhu waa qayb kale oo muhiim ah. Inta jeer ee PWM ayaa go'aamisa sida ugu dhakhsaha badan ee muddada - qaddarka wakhtiga ay ku qaadanayso calaamaduhu inuu shido oo la damiyo - waxaa dhammaystiray calaamada PWM.

PWM sida Soo-saarka Darawalka LED

Marka calaamada PWM loo beddelo danab DC ah oo loo isticmaalo sidii an Darawalka LED-ka wax soo saarka, habaynta width garaaca garaaca dhacaya. Wareegga wax soo saarka PWM wuxuu gooyaa qulqulka LED-ka ee u dhexeeya gobolada shidma iyo kuwa ka baxsan inta jeer ee sarreeya. Sidaa darteed, flicker-ka sababa isbeddelka soo-saarka iftiinka LED-ka waa mid aan la arki karin indhaha bini'aadamka.

Dadku waxay had iyo jeer ku wareeraan dhowr waxyaalood oo ku saabsan farqiga u dhexeeya wax soo saarka PWM iyo calaamadda dhumucda. Haddaba bal aan dhawr arrimood is dul taagno.

Farsamadu waxay soo saartaa calaamada PWM sida calaamad dhijitaal ah, taas oo ka dhigaysa mid joogto ah fiilada dimmable. Taas bedelkeeda, darawalku wuxuu go'aamiyaa wax soo saarka hadda isagoo ogaanaya wareegga waajibaadka PWM.

PWM Dimming Drivers in the Market

Darawaliinta yaraynta PWM ayaa si isa soo taraysa muhiim ugu ah nalka LED. Si kastaba ha ahaatee, waxaa lagama maarmaan ah in la ogaado in PWM dimming darawallada laga yaabo in lagu xaqiiqsado laba siyaabood oo kala duwan, oo aan ogaano waxay yihiin.

Dimming PWM been abuur ah

Ujeedada habka been-abuurka ah ee been-abuurka ah waa in loo beddelo gelinta PWM calaamad kontoroolka analoogga ah. Filter-kaabiyaha (RC) ayaa ku dhex jira darawalka.

Shaandheeyaha RC waxa uu calaamadda PWM u beddelaa danab dheellitiran oo DC ah oo ku salaysan wareegga shaqada. Dimming PWM been abuur ah ayaa faa'iido u leh inay noqoto mid aan buuq lahayn, mana jiro wax buuq ah oo ka soo baxa sababtoo ah hadda LED-ku waa mid joogto ah.

Si kastaba ha ahaatee, habkani waa dhibaato maadaama saxnimadu liidato haddii qiimaha ugu sarreeya ee PWM uu ka hooseeyo 10V. Intaa waxaa dheer, qiimaha iska caabinta-capacitor (RC) ayaa xaddidaya inta jeer ee calaamadda PWM.

Maqnaanshaha dhabta ah ee PWM

Maqnaanshaha dhabta ah ee PWM, qulqulka LED-yada ayaa shid ama damiya inta jeer iyo wareegga shaqada ee la cayimay. Joogitaanka MCU ama microcontroller ee darawalka ayaa awood u siinaya calaamada PWM si loo ogaado danabyada ugu sarreeya. Maqnaanshaha dhabta ah ee PWM waxa ay taageertaa tiro balaadhan oo ah inta jeer ee PWM.

Astaanta aasaasiga ah ee dhimista PWM waa awoodda ay u leedahay inay ilaaliso barta cad ee wax soo saarka LED. Intaa waxaa dheer, heerka korantada tixraaca oo sarreeya oo ka sarreeya khaladaadka waa la oggol yahay.

Software-ka horumarinta darawalku wuxuu uga baahan yahay isticmaalayaasha inay doortaan qaabka dhimista PWM.

Beddelka Wareegga Waajibka (Nuur) ee PWM

In kasta oo sahaydu daaran tahay oo la damiyo si degdeg ah iyadoo la adeegsanayo wax-soo-saarka cabbirka ballaca garaaca wadnaha, LED-yadu ma libiqsadaan. Wareegtada Waajibka ah waa ereyga loo isticmaalo in lagu qeexo cabbirka dhalaalka PWM.

Wareega waajibaadku waa saamiga wakhtiga runtime wareegga ee uu shido. Wareegga waajibaadka waxaa lagu muujiyay boqolkiiba, iyadoo 100 boqolkiiba ay ka dhigan tahay xaaladda ugu macquulsan ee suurtogalka ah (si buuxda ON) iyo boqolkiiba hoose taasoo keentay soo saarista iftiinka LED liidata.

Calaamadda PWM waxay leedahay 50% wareegga shaqada haddii ay tahay 50% wakhtiga oo ay ka baxdo 50% wakhtiga. Calamku wuxuu u muuqdaa sidii mowjad labajibbaaran, dhalaalka nalkuna waa inuu ahaadaa dhexdhexaad. Marka boqolkiiba ay ka weyn tahay 50%, calaamaduhu waxay ku qaataan waqti ka badan gobolka ON marka loo eego gobolka OFF, iyo lidka ku ah marka wareegga waajibaadku ka yar yahay 50%.

Hababka Balaadhka garaaca wadnaha (PWM) vs. Analog Dimming of LEDs

Iyada oo kobaca jibbaarada ee iftiinka LED-ka ee suuqa, waxaa jiray kor u kaca dabiiciga ah ee baahida loo qabo darawallada LED-ga oo aad u hufan oo si sax ah loo habeeyey. Si loo ilaaliyo istiraatijiyadda tamarta wax ku oolka leh iyo dabacsanaanta isticmaalka dhamaadka naqshadeynta LED, nalalka wadooyinka "casriga ah", nalalka toosasha, iyo calaamadaha dhijitaalka ah, iyo isticmaalka kale, waxay u baahan yihiin qulqulo si sax ah loo kontoroolo iyo, xaalado badan, shaqeynta daciifinta.

PWM Dimming

Hababka ballaca garaaca garaaca wadnaha (PWM) oo sii yaraanaya, hadda LED-ku waa daaran yahay oo demi doonaa. Si looga hortago saameyn liidata, inta jeer ee shid/dami waa in ay ka dhakhso badan tahay waxa ay isha bini'aadamku garan karto (badanaa in ka badan 100Hz). Dimming PWM waxaa lagu fulin karaa habab kala duwan:

Isticmaalka calaamada PWM si aad toos ugu beddesho danabka.
Iyada oo loo marayo transistor-ka ururiyaha furan
By microcontroller.

Celceliska hadda ee LED-ku wuxuu la mid yahay wadarta guud ee hadda magac-u-yaalka ah iyo meertada xil-wareejintiisa. Nashqadeeyaha waa inuu sidoo kale ku xisaabtamaa dib u dhaca wax soo saarka beddelka xiritaanka iyo bilaabista, taas oo xaddidaysa inta jeer ee dhimista PWM iyo kala duwanaanshaha wareegga shaqada.

Analog Dimming

Hagaajinta heerka LED-ka hadda waxaa loo tixraacaa sida dimming analoogga. Isticmaalka korantada kontoroolka DC ee dibadda ah ama dimmaynta iska caabinta ayaa tan fulin karta. In kasta oo xaqiiqda ah in dimming analoogga hadda ay ogolaato hagaajinta heerka, heerkulka midabku wuu beddeli karaa. Dimming Analog laguma talinayo codsiyada halka midabka iftiinka LED uu muhiim u yahay.

Aynu eegno faraqa aasaasiga ah ee u dhexeeya PWM & dimming analog

PWM Dimming	Analog Dimming
Iftiinka waxa lagu hagaajiyaa iyada oo la beddelo wakhtiga ugu sarreeya ee darawalka	Iftiinka ayaa lagu hagaajiyay iyadoo la beddelayo DC-ga oo u socda LED-ka
Ma jiro Midab Shift	Shift Midab Suuragal ah sida LED hadda isbeddelo
Dhibaatooyinka degdega ah ee hadda jira	Ma jiro wax degdeg ah oo ku socda qalabka
Xaddidaadaha soo noqnoqda & walaacyada soo noqnoqda ee suurtogalka ah	Ma jiraan wax walaac ah oo soo noqnoqda
Isbeddel toos ah oo dhalaalaya	linearity dhalaalku maaha sida wanaagsan
Hooska Optical ilaa waxtarka korantada	Indho-indheynta sare ee waxtarka korantada (> lumen per watt la isticmaalo)

Tixgelinta Hardware ee PWM

Dimming PWM waxay u baahan tahay tixgelinno gaar ah marka la horumarinayo nidaamka (ama guddiga PC).

Darawalku caadi ahaan waa lama huraan leh nalka-dambe ee LEDs heerka hadda jira awgeed. Wax soo saarka dhijitaalka ah, sida mid ka imanaya microcontroller, looma isticmaali karo in si toos ah loo wado.

Heerka macquulka toosan ee FET (Field-Effect Transistor) nooca transistor waxaa caadi ahaan loo adeegsadaa darawal ahaan codsiyo kala duwan. resistor-ka iridka ku yaala waa in loo isticmaalaa in lagu badalo FET si loo xakameyo iridka hadda socda, iska caabin waa lama huraan haddii xaddidaada hadda la rabo. Hubi inaad ka fiiriso tamarta wadista iftiinka dambe ee saxda ah iyo qulqulka xaashida xogta LCD.

Dareewalka nooca beddelka ah ee LED waxa laga yaabaa inuu u kaxeeyo nalka dambe ee LED xilliyada sare iyo si hufan. Darawaladani aad bay u dhib badan yihiin, IC-ga takhasuska lehna waxay inta badan qabtaa shaqada beddelka. Wax gelinta PWM ee dhowr ICs waxaa si cad loogu nashqadeeyay codsiyada yaraynta.

Haddii microcontroller la isticmaalayo, taxadar waa in la qaataa in lagu xidho biinka wax soo saarka ee taageera PWM (timer/counter) wax soo saarka haddii PWM loo isticmaalo qalab ahaan.

PWM - Tixgelinta Firmware/Software

Dimming PWM waxay u baahan tahay tixgalin qaabaynta nidaamka gaar ah (ama guddiga PC).

Sababtoo ah ilaa hadda sare, LED-yada nooca dambe waxay caadi ahaan u baahan yihiin darawal. Wax-soo-saarka dhijitaalka ah, sida kuwa ka soo baxa microcontrollers, looma isticmaali karo in si toos ah loo wado.

Caadi ahaan, heerka macquulka fudud ee FET (Field-Effect Transistor) nooca transistor-ka waxa loo isticmaalaa darawal ahaan codsiyo kala duwan. Beddelka FET-ga si loo habeeyo albaabka hadda wuxuu u baahan yahay iska caabin albaabka, iyo resistor ayaa loo baahan yahay haddii xaddididda hadda la doonayo. Ka hubi xaashida xogta LCD ee saxda ah ee tamarta wadista iftiinka dambe iyo qulqulka.

Dareewalka nooca beddelka ah ee LED waxa laga yaabaa inuu u kaxeeyo iftiinka dambe ee LED si waxtar leh iyo qulqulo waaweyn. Darawaladani aad bay u dhib badan yihiin, shaqada beddeliddana waxa si joogto ah u maamula IC khaas ah. Dhawr ICs 'PWM gelinta ayaa si gaar ah loogu sameeyay codsiyada khafiifinta.

Haddii PWM loo isticmaalo qalab ahaan, fiiro gaar ah waa in la sameeyaa si loogu xidho biinka wax soo saarka ee taageera PWM (waqtiga/counter) wax soo saarka kontoroolka yar yar.

Waxqabadka PWM iyo Codsiyada

Marka xilliyada shidda iyo daminta ee shiduhu la beddelo marka loo eego midba midka kale, xadiga korantada ee la geeyo rarka ayaa kor u kacda. Sida la filayo, xakamaynta noocan ah waxay bixisaa faa'iidooyin badan.

PWM oo lagu lammaaniyay raadraaca barta korantada ugu sarreysa, ama MPPT, waa mid ka mid ah siyaabaha aasaasiga ah ee lagu dhimayo wax soo saarka muraayadda cadceedda si ay ugu fududaato batteriga inuu isticmaalo.

PWM, dhinaca kale, waxay ku habboon tahay in lagu xoojiyo qalabka aan shaqaynayn, sida matoorada, sababtoo ah beddelkan gaarka ah ayaa saameyn yar ku leh iyaga. Xidhiidhka tooska ah ee ka dhexeeya shaqada LED-yada iyo korantada galitaanka awgeed, tani waxay sidoo kale khusaysaa LED-yada.

Intaa waxaa dheer, inta jeer ee beddelidda PWM waa in aysan wax saameyn ah ku yeelan culeyska, iyo qaabka mawjadda ka dhalanaya waa in ay noqotaa mid siman oo ku filan si culeysku u aqoonsado.

Iyada oo ku xidhan aaladda iyo shaqadiisa, inta jeer ee wareejinta korontada ayaa caadi ahaan si weyn u kala duwanaan doonta. Heerarka korantada, sahayda korantada kombayutarka, iyo cod-weyneyaasha maqalka dhamaantood waxay u baahan yihiin in la beddelo xawaaraha tobanaan ama boqollaal kilohertz.

Faa'iidada kale ee muhiimka ah ee qaadashada PWM waa luminta awoodda hoose ee cajiibka ah ee beddelka aaladaha. Marka daminta dabka, wax hadda socda ma jiro. Intaa waxaa dheer, marka shiduhu shido oo uu koronto u dirayo rarkiisa, waxaa ku dhacaya koronto yar oo korkiisa ah.

Qodobbo la xiriira

Wax kasta oo aad u baahan tahay inaad ka ogaato ku saabsan xakamaynta DMX512

Wax kasta oo aad uga baahan tahay inaad ka ogaato Triac Dimming ee LED-yada

Sida loo dhimo laydhka laydhka LED

Sida Loo Doorto Korontada LED-ka saxda ah

DMX vs. Xakamaynta Iftiinka DALI: Midkee la dooranayaa?

Hagaha ugu dambeeya ee 0-10V Dimming

FAQs

Haa, PWM dimming waxay la jaan qaadaysaa dhammaan LED-yada. Wareegga darawalka LED-ku wuxuu wax ka beddelaa ballaca garaaca wadnaha PWM si uu u habeeyo hadda la siiyay LED-ka, taasoo u oggolaanaysa in si fiican loo xakameeyo heerka dhalaalka LED-ka. Si kastaba ha ahaatee, markaad dooranayso darawalka LED PWM xallinta khafiifinta, waxaa muhiim ah in la tixgeliyo qeexida korantada ee LED-ka iyo sidoo kale shuruudaha sahayda korontada si loo dammaanad qaado waxqabadka ugu sarreeya iyo hawlgalka badbaadada leh.

Sawirka muuqaalka cabbirka cabbirka garaaca wadnaha (PWM) ee loo isticmaalo in lagu dhimo nalalka LED-ka waxaa loo tixraacaa muujinta dhimista PWM. Calaamadda PWM waa calaamada mowjad labajibbaaran oo isku beddela heerarka tamarta sare iyo kuwa hooseeya. Iftiinka LED-ka waxaa lagu go'aamiyaa muddada heerka tamarta sare (ballaca garaaca wadnaha). Caadi ahaan, bandhiga yaraynta PWM wuxuu soo bandhigayaa garaafka calaamada PWM, oo leh dhidibka x-xiddigga oo tilmaamaya wakhtiga iyo dhidibka y oo matalaya heerarka danab. Isticmaalayaasha ayaa laga yaabaa inay ka faa'iidaystaan bandhigga si ay u arkaan calaamadda PWM oo ay u beddelaan wareegga waajibaadka si ay u helaan heerka dhalaalka ee la doonayo.

Nalalka LED-yadu waxay isticmaalaan dimmaynta PWM si ay u maareeyaan heerarkooda dhalaalkooda oo ay u badbaadiyaan tamarta. Nalalka LED-yadu waxay sii daayaan iftiinka marka hadda uu dhex socdo semiconductor, oo ka soo horjeeda nalalka iftiinka, kuwaas oo dhaliya iftiin marka uu kululeeyo qulqulka korontada. Tani waxay muujinaysaa in dhalaalka LED-ku uu la mid yahay xadiga korantada ee loo soo diro.

Beddelka ballaca garaaca wadnaha ee calaamada PWM, darawalka LED waxa uu kala duwanaan karaa ta hadda la geynayo LED-ka. Darawalka LED-ku waxa uu xaddidaa xadiga korantada ee la keeno LED-ka isaga oo dhimaya ballaca garaaca wadnaha, taas oo keentay in heerka dhalaalka uu yaraado. Tani waxay badbaadinaysaa tamarta waxayna kordhisaa nolosha LED-ka.

Intaa waxaa dheer, marka la barbar dhigo dimming analoogga, PWM dimming waxay u oggolaaneysaa in si sax ah loo xakameeyo iftiinka LED-yada. Dimming Analog wuxuu u shaqeeyaa hoos u dhigista korantada lagu dabaqo LED-ka, taas oo keeni karta liidasho iyo dhumuc aan sinnayn. Duufaanta PWM, dhanka kale, waxay siinaysaa waayo-aragnimo mugdi badan oo joogto ah.

Guud ahaan, dhimista PWM waa farsamo muhiim ah oo lagu hagaajinayo dhalaalka LED iyo kor u qaadista dhaqaalaha tamarta.

Si aad u khafiifiso LED-ka leh PWM, waxaad u baahan doontaa PWM-kaar LED-ka iyo kontaroole soo saari kara calaamada PWM. Kuwa soo socda waa tillaabooyinka lagu khafiifinayo LED-ka PWM:

1. Dooro darawal LED ah oo taageera PWM dimming: Hubi in dareewalka LED-ka ee aad dooratay uu taageerayo dhimista PWM oo uu ku habboon yahay LED-ka aad doonayso inaad isticmaasho.

2. Dooro kontaroolaha PWM: Dooro kontaroolaha PWM ee awooda in uu dhaliyo calaamada PWM ee ku haboon darawalka LED-ka ee aad dooratay.

Ku dheji darawalka LED-ka iyo kontaroolaha PWM sida soo socota: Ku xidh wax-soo-saarka PWM-ga wax-soo-saarka dareewalka LED-ka. Had iyo jeer u hoggaansan nidaamka fiilooyinka ee ay bixiso soo saaraha darawalka LED.

4. Go'aami wareegga waajibaadka: Wareegga waajibaadku waa saamiga wakhtiga uu calaamadda PWM " shidsan yahay." Iftiinka LED-ka waxaa lagu go'aamiyaa wareegga shaqada. Wareegga waajibka weyni wuxuu soo saaraa LED iftiimaya, halka wareegga shaqada hoose uu soo saaro LED-gaaban. Adigoo isticmaalaya kontaroolaha PWM, u deji wareegga waajibaadka heerka dhalaalka la rabo.

5. Tijaabi oo hagaaji: Si aad u hesho heerka dhalaalka ee loo baahan yahay, tijaabi LED-ga oo hagaaji wareegga shaqada hadba sida loogu baahdo.

Dimming LED leh PWM waxay ka dhigan tahay xulashada darawal LED ah oo ku habboon iyo kontaroolaha PWM, si habboon ugu xira iyaga, beddelaadda wareegga waajibaadka, ka dibna tijaabinta iyo wax ka beddelka illaa heerka dhalaalka la rabo laga helayo.

Marka lagu isticmaalo nalalka LED, dimmers PWM waxay yareeyn karaan isticmaalka korontada. Dimming PWM waxay xakamaysaa xadiga korantada ee loo soo diro LED, taasoo si toos ah u bedesha heerkeeda dhalaalkeeda. Dimmer-ka PWM wuxuu yareeyaa isticmaalka korantada LED-ka isagoo hoos u dhigaya tan hadda la keeno.

Dimming PWM ee Telefishinada LED waa farsamo lagu hagaajinayo dhalaalka shaashadda iyadoo si degdeg ah loo shido oo damiyo nalka dambe. Waxay badbaadisaa tamarta waxayna wanaajisaa saamiga isbar-bardhigga, laakiin sidoo kale waxay soo saari kartaa liidasho iyo blur dhaqaaq. Si wax looga qabto walaacyadan, qaar ka mid ah Telefishinnada LED-yada waxay shaqaaleeyaan hab-dhimis badan oo PWM ah.

Taas waxaa go'aamiya codsiga. Soo noqnoqoshada PWM ee sare waxay faa'iido u leedahay dhimista LED-yada sababtoo ah waxay keenaysaa wax qabad yar oo la dareemi karo iyo wax qabad yareyn. Inta jeer ee PWM hoose, dhanka kale, waxaa laga yaabaa inay faa'iido u leedahay codsiyada kontoroolka mootada maadaama ay yarayso tirada qaylada korantada ee uu abuuray matoorku.

PWM ma soo gaabinayso nolosha LED-yada. Duufaanta PWM, dhab ahaantii, waxay gacan ka geysan kartaa kordhinta nolosha LED-ka iyadoo hoos loo dhigayo qaddarka hadda korantada ee LED-ka, taas oo ka hortagi karta kulaylka oo kordhisa cimriga LED-ka.

Maya, nalalka LED-yada oo dhami ma yihiin kuwo dami kara. Nalalka LED-ka ee la dhayalsan karo ayaa koronto ahaan loo cayimay in lagu isticmaalo kontaroolayaasha dimming. Aad bay muhiim u tahay in la baaro sanduuqa iftiinka LED-ka ama faahfaahintiisa si loo arko haddii ay daciif tahay.

Waxaa lagu go'aamiyaa iftiinka LED-ka. Diidminta nalalka LED-yada qaarkood waxay u baahan tahay in lagu rakibo kontorool yar oo ku habboon ama beddelka darawalka LED-ka oo leh dirawalka LED-ka-ciif ah. Si kastaba ha ahaatee, dhammaan nalalka LED-ka lama yarayn karo, sidaas awgeed waa muhiim in dib loo eego sifooyinka iftiinka LED ka hor inta aan la isku dayin in la yareeyo.

Dimmer-ka ugu fiican ee nalalka LED waxaa lagu go'aamiyaa nooca LED-ka iyo darawalka LED-ka ee la isticmaalo. Waa muhiim in la doorto dimmer si toos ah loogu isticmaalo nalalka LED-ka oo u hoggaansamaya heerarka korantada ee LED-ka iyo darawalka LED-ka. Qaar ka mid ah nalalka LED-yada waxay u baahan yihiin noocyo gaar ah oo dimmers, sida dimmers-geesaha ama dimmers-ka hormoodka ah, markaa ka hor intaadan dooran dimmer, hubi xirmada ama faahfaahinta iftiinka LED-ka.

Maya, PWM ma beddelo danabka la siiyay aaladda la kantaroolo. Waxay wax ka beddeshaa wareegga waajibaadka calaamada, kaas oo beddela dhererka wakhtiga calaamaduhu ku jiro xaaladda "on" iyadoo la ilaalinayo tamarta joogtada ah.

LED-yada waxaa laga yaabaa in la damiyo iyadoo la isticmaalayo danab. Mid ka mid ah dariiqo loo yareeyo LED-yada ayaa ah dhumucda analoogga, taas oo ku lug leh hoos u dhigista tamarta la siinayo LED. Dimming PWM, dhanka kale, waa hab aad u baahsan oo loo yareeyo LED-yada maadaama ay u ogolaato si fudud oo sax ah kontoroolka khafiifinta.

PWM LED dimming waa farsamo lagu hagaajinayo dhalaalka nalalka LED iyadoo si degdeg ah loo shido loogana damiyo korontada LED-ka. Habaynta ballaca garaaca wadnaha ee korantada ee sahayda LED-ku waxay soo saartaa flicker aad ugu dhaqso badan in ay indhaha bini'aadamku gartaan. Dimming PWM LED wuxuu badbaadiyaa tamar wuxuuna bixiyaa si fudud, kontorool khafiifin sax ah oo ka badan kan analoogga ah.

Maya, dhammaan taageerayaasha PWM kuma shaqeeyaan 12V. Taageerayaasha PWM waxay ku yimaadaan heerar koronto oo kala duwan, oo ay ku jiraan 5V, 12V, iyo 24V. Si loo xaqiijiyo waafaqsanaanta shayga la qaboojiyey, hubi heerka danab ee taageeraha PWM.

Haa, danabku waa muhiim PWM. Korontada calaamadda PWM waa in ay la jaanqaadaan qalabka la xakameynayo. Tusaale ahaan, haddii qalabku u baahan yahay 5V PWM signal, ka faa'iidaysiga 12V PWM signal waxay sababi kartaa inay cilad yeelato. Si loo xaqiijiyo waafaqsanaanta, hubi qeexida shayga la xakameynayo iyo kantaroolaha PWM.

PWM waxaa laga yaabaa in looga faa'iidaysto codsiyada hadda jira iyo kuwa tooska ah labadaba. Calaamada PWM, dhanka kale, waa in lagu hagaajiyaa nooca codsiga. Calaamada PWM waa in loo beddelaa qaab mawjadaha AC iyadoo la isticmaalayo rogaye ama qalab u dhigma oo loogu isticmaalo codsiyada AC. Calaamadda PWM si toos ah ayaa looga faa'iidaysan karaa si loo xakameeyo aaladda ku shaqaynaysa codsiyada DC.

Maya, isticmaalka 24V darawalka 12V LED laguma talinayo. Si loo dammaanad qaado badbaadada iyo hawlgalka ugu fiican, danabku waa inuu la mid yahay heerka korantada ee LED-ka. Isticmaalka dareewalka danab sare waxa ay dhaawici kartaa LED-ka oo ay soo gaabin kartaa nolosheeda. Waa muhiim in la doorto darawal u dhigma baahida korantada ee LED-ka.

Laguma talin in la isticmaalo darawal 24V ah oo leh nalal 12V LED ah. Markaad isticmaalayso darawal danab sare leh, nalalka LED-ku waxa laga yaabaa inay kulaylkaraan oo ay hore u fashilmaan. Waa muhiim in la doorto darawal ku habboon baahida korantada ee nalalka LED-ka ee la isticmaalayo.

Inta jeer ee ku habboon PWM ee dimming LED guud ahaan waxaa loo arkaa in ay ka sarreeyaan 100 Hz si looga fogaado flicker muuqda, iyo sida caadiga ah agagaarka 500 Hz ilaa 1 kHz si looga fogaado buuqa la maqli karo.

Si loo yareeyo liidata marka la isticmaalayo yaraynta PWM, waxaad isticmaali kartaa soo noqnoqoshada PWM sare, kordhiso wareegga waajibaadka, oo aad isticmaasho kapacitor qiime weyn ee wareegga darawalka LED. Intaa waxa dheer, waxa kale oo aad isticmaali kartaa farsamo dimming oo aad u horumarsan sida dimming analoog ama dimming hybrid.

Faa'iidooyinka ugu muhiimsan ee isticmaalka PWM dimming hababka kale ee dhimista waa in ay tahay xal fudud oo kharash-ku-ool ah, waxay bixisaa heer sare oo sax ah, oo aan dhalin kuleyl badan. Intaa waxaa dheer, dhimista PWM waxay la jaan qaadaysaa darawallada LED-yada oo kala duwan waxaana si fudud loogu xakameyn karaa microcontroller ama wareegyada kale ee dhijitaalka ah.

Summary

Dimming PWM waa hab fudud oo aan qaali ahayn oo lagu hagaajinayo dhalaalka nalalka LED. Dimmaynta PWM waxay leedahay faa'iidooyin kala duwan marka loo eego is-dabar-dhigga analoogga, oo ay ku jiraan dhaqaalaha tamarta sare, xakamaynta saxda ah, iyo cimriga dheer. Si kastaba ha ahaatee, waxay soo bandhigtaa arrimo dhowr ah, sida EMI suurtogalka ah iyo baahida loo qabo wareegyada beddelka ee soo noqnoqda. Si kastaba ha noqotee, dhimista PWM waa farsamo muhiim ah oo loogu talagalay habeynta nalalka LED-ka, mustaqbalkeeduna wuxuu u muuqdaa mid rajo leh.

LEDYi waxay soo saartaa tayo sare leh Xarigga LED-yada iyo dabacsanaanta neon-ka LED. Dhammaan alaabooyinkayagu waxay maraan shaybaarro teknoolojiyad sare ah si loo hubiyo tayada ugu sarreysa. Ka sokow, waxaan ku siin fursado la beddeli karo on our strips LED iyo dabacsanaan neon. Marka, xariijinta LED-ka qaaliga ah iyo dabacsanaanta neon-ka LED, la xiriir LEDYi DHAQSO BADAN!

Nala Soo Xidhiidh Hadda!

Ma qabtaa su'aalo ama jawaab celin? Waxaan jeclaan lahayn inaan kaa maqalno! Kaliya buuxi foomka hoose, kooxdayada saaxiibtinimada ayaa ka jawaabi doonta ASAP.

Martin Wan

Hi, waxaan ahay Martin, aasaasaha LEDYi Lighting. Waxaan dalka Shiinaha ka waday warshad samaysa xariijinta LED-ka iyo neon-ka LED-ka muddo hadda laga joogo 10 sano, ujeeddada maqaalkana waa in aan wadaagno aqoonta la xiriirta xariijinta LED-ka iyo neon-ka LED-ka marka laga eego dhinaca alaab-qeybiyaha Shiinaha.

Strip LED

Neon Flex

Bar toosan oo modular ah

Iftiin toosan oo Skyline ah

Khadka LED-ka ee aan dhibicda lahayn

gidaarada dhaqda

accessories

Xakamaynta LED ee hufan: Sahaminta PWM Dimming

Waa maxay PWM dimming?