Mphamvu ya LED drive ndi chosinthira mphamvu chomwe chimasintha magetsi kukhala magetsi ndi magetsi enaake kuti LED itulutse kuwala. Nthawi zonse: mphamvu ya LED drive imagwiritsa ntchito mphamvu yamagetsi ...

- Malinga ndi njira yoyendetsera galimoto:

(1) Mtundu wamagetsi wokhazikika

a. Mphamvu yotulutsa ya dera loyendetsa magetsi nthawi zonse imakhala yokhazikika, koma mphamvu ya DC yotulutsa imasiyana mkati mwa mtundu wina malinga ndi kukula kwa mphamvu yotulutsa. Mphamvu yotulutsa ikachepa, mphamvu yotulutsa imachepa. Mphamvu yotulutsa ikakula, mphamvu yotulutsa imakwera;

b. Dongosolo lamagetsi lokhazikika siliopa kufupika kwa magetsi, koma ndikoletsedwa kutsegula katundu wonse.

c. Ndibwino kuti magetsi azikhala ndi magetsi okhazikika kuti ayendetse ma LED, koma mtengo wake ndi wokwera.

d. Samalani ndi mphamvu yamagetsi ndi mphamvu yamagetsi yomwe imagwiritsidwa ntchito, zomwe zimachepetsa kuchuluka kwa ma LED omwe amagwiritsidwa ntchito;

(2) Mtundu wolamulidwa:

a. Pamene magawo osiyanasiyana mu dera lowongolera magetsi atsimikizika, magetsi otuluka amakhala okhazikika, koma mphamvu yotuluka imasintha ndi kuwonjezeka kapena kuchepa kwa katundu;

b. Dera lowongolera magetsi siliopa kutseguka kwa katundu, koma ndikoletsedwa kwambiri kufupikitsa kayendedwe ka katundu kwathunthu.

c. LED imayendetsedwa ndi dera loyendetsa magetsi lokhazikika, ndipo chingwe chilichonse chiyenera kuwonjezeredwa ndi kukana koyenera kuti chingwe chilichonse cha LED chiwonetse kuwala kwapakati;

d. Kuwala kudzakhudzidwa ndi kusintha kwa magetsi kuchokera pakukonzanso.

-Kugawa mphamvu ya LED drive:

(3) Kuthamanga kwa pulse

Mapulogalamu ambiri a LED amafuna ntchito zochepetsera kuwala, mongaKuwala kwa LED kumbuyokapena kufooka kwa kuwala kwa zomangamanga. Ntchito ya kufooka imatha kuchitika mwa kusintha kuwala ndi kusiyana kwa LED. Kungochepetsa mphamvu ya chipangizocho kungathe kusintha mphamvu ya magetsiKuwala kwa LEDKutulutsa kwa LED, koma kulola LED kugwira ntchito pansi pa mphamvu yotsika kuposa mphamvu yoyesedwa kungayambitse zotsatira zambiri zosafunikira, monga kusintha kwa chromatic. Njira ina yosinthira mphamvu yosavuta ndikuyika chowongolera cha pulse width modulation (PWM) mu driver wa LED. Chizindikiro cha PWM sichimagwiritsidwa ntchito mwachindunji kulamulira LED, koma kulamulira switch, monga MOSFET, kuti ipereke mphamvu yofunikira ku LED. Wolamulira wa PWM nthawi zambiri amagwira ntchito pafupipafupi yokhazikika ndipo amasintha m'lifupi mwa pulse kuti igwirizane ndi kayendedwe ka ntchito kofunikira. Ma chip ambiri a LED amagwiritsa ntchito PWM kulamulira kutulutsa kwa kuwala kwa LED. Pofuna kuonetsetsa kuti anthu sakumva kuthwanima koonekeratu, pafupipafupi ya pulse ya PWM iyenera kukhala yoposa 100HZ. Ubwino waukulu wa PWM control ndikuti mphamvu yowala kudzera mu PWM ndi yolondola kwambiri, zomwe zimachepetsa kusiyana kwa mitundu pamene LED imatulutsa kuwala.

(4) Kuyendetsa kwa AC

Malinga ndi ntchito zosiyanasiyana, ma AC drive amathanso kugawidwa m'mitundu itatu: buck, boost, ndi converter. Kusiyana pakati pa AC drive ndi DC drive, kuwonjezera pa kufunika kokonza ndikusefa AC yolowera, palinso vuto la kudzipatula komanso kusadzipatula kuchokera pamalingaliro achitetezo.

Chowongolera cholowetsa cha AC chimagwiritsidwa ntchito makamaka pa nyali zobwezeretsanso: pa nyali khumi za PAR (Parabolic Aluminium Reflector, nyali yodziwika bwino pa siteji ya akatswiri), mababu wamba, ndi zina zotero, amagwira ntchito pa 100V, 120V kapena 230V AC. Pa nyali ya MR16, imafunika kugwira ntchito pansi pa 12V AC input. Chifukwa cha mavuto ena ovuta, monga kuthekera kwa kufinya kwa triac wamba kapena leading edge dimmers ndi trailing edge dimmers, komanso kuyanjana ndi ma transformer amagetsi (kuchokera ku AC line voltage kupanga 12V AC ya MR16 lamp operation). Vuto la magwiridwe antchito (ndiko kuti, ntchito yopanda kuzima), chifukwa chake, poyerekeza ndi DC input driver, gawo lomwe limagwiritsidwa ntchito mu AC input driver ndi lovuta kwambiri.

Mphamvu yamagetsi ya AC (mains drive) imagwiritsidwa ntchito pa LED drive, nthawi zambiri kudzera mu masitepe monga kutsika pang'onopang'ono, kukonza, kusefa, kukhazikika kwa magetsi (kapena kukhazikika kwa magetsi), ndi zina zotero, kuti asinthe mphamvu ya AC kukhala mphamvu ya DC, kenako nkupereka ma LED oyenera kudzera mu drive circuit yoyenera. Mphamvu yogwirira ntchito iyenera kukhala ndi mphamvu yosinthika kwambiri, yaying'ono komanso yotsika mtengo, komanso nthawi yomweyo kuthetsa vuto la chitetezo. Poganizira momwe magetsi amakhudzira, kusokoneza kwa maginito ndi mavuto a mphamvu ziyeneranso kuthetsedwa. Pa ma LED amphamvu otsika ndi apakatikati, kapangidwe kabwino kwambiri ka dera ndi dera losinthira lokhalokha lokhala ndi mbali imodzi; pa ntchito zamagetsi amphamvu, dera losinthira mlatho liyenera kugwiritsidwa ntchito.

–Kugawa malo oyika magetsi:

Mphamvu yoyendetsera galimoto ingagawidwe m'magulu amagetsi akunja ndi magetsi omangidwa mkati malinga ndi malo oyika.

(1) Mphamvu yamagetsi yakunja

Monga momwe dzinalo likusonyezera, magetsi akunja ndi oti akhazikitse magetsi akunja. Nthawi zambiri, magetsi amakhala okwera, zomwe zimaika anthu pachiwopsezo, ndipo magetsi akunja amafunika. Kusiyana ndi magetsi omwe ali mkati mwake ndikuti magetsiwo ali ndi chipolopolo, ndipo magetsi amsewu ndi ofala kwambiri.

(2) Mphamvu yolumikizira mkati

Mphamvu yamagetsi imayikidwa mu nyali. Nthawi zambiri, magetsi amakhala otsika, kuyambira 12v mpaka 24v, zomwe sizimaika anthu pachiwopsezo. Nyali yodziwika bwino iyi ili ndi magetsi a babu.