Simba re LED drive isimba rinoshandura simba rinoita voltage chaiyo uye current kuti LED ibudise chiedza. Mumamiriro ezvinhu akajairwa: simba re LED drive rinopinda rinosanganisira high-voltage power frequency AC (kureva simba reguta), low-voltage DC, high-voltage DC, low-voltage uye high-voltage. Frequency AC (yakadai semagetsi anobuda mu transformer), nezvimwewo.

- Zvichienderana nenzira yekutyaira:

(1) Rudzi rwemazuva ano runogara ruripo

a. Kubuda kwemagetsi kwedunhu remagetsi rinogara riripo nguva dzose, asi magetsi emagetsi emagetsi anobuda anosiyana mukati mechikamu chakati zvichienderana nehukuru hwekudzivirira kwemutoro. Kudzikira kwemutoro, kudzikira kwemagetsi anobuda. Kukura kwekudzivirira kwemutoro, kubuda kwemagetsi. Kukwira kwemagetsi;

b. Dunhu remagetsi risingaperi harityi kupfupika kwemutoro, asi zvinorambidzwa zvachose kuvhura mutoro zvachose.

c. Zvakanakira kuti circuit yedhiraivha igare ichishanda kuti ishandise ma LED, asi mutengo wacho wakakwira.

d. Teerera kukosha kwakanyanya kwemagetsi nemagetsi anoshandiswa, izvo zvinoderedza huwandu hwema LED anoshandiswa;

(2) Rudzi rwakarongeka:

a. Kana ma parameter akasiyana-siyana ari mu circuit regulator voltage akaonekwa, voltage inobuda inogadziriswa, asi current inobuda inochinja nekuwedzera kana kudzikira kwemutoro;

b. Dunhu remagetsi rinodzora magetsi harityi kuvhurwa kwemutoro, asi zvinorambidzwa zvachose kupfupisa mutero zvachose.

c. LED inofambiswa nemagetsi anodzikamisa magetsi, uye tambo yega yega inofanira kuwedzerwa ine resistance yakakodzera kuti tambo yega yega ye LED iratidze kupenya kwepakati;

d. Kupenya kuchakanganiswa nekuchinja kwevoltage kubva pakugadziriswa.

-Kupatsanurwa kwesimba re LED drive:

(3) Kufambisa kwemoyo (pulse drive)

Mazhinji ma LED applications anoda mabasa ekudzima chiedza, akadai seMwenje wekumashure we LEDkana kudzima kwechiedza chekuvaka. Basa rekudzima rinogona kuitwa nekugadzirisa kupenya uye kusiyana kwe LED. Kungoderedza simba remagetsi remudziyo kunogona kukwanisa kugadzirisaChiedza che LEDKuburitsa magetsi, asi kurega LED ichishanda pasi pemamiriro ekunze kwemagetsi akaderera pane akayerwa kunokonzera mhedzisiro yakawanda isingafadzi, senge chromatic aberration. Imwe nzira yekugadzirisa magetsi iri nyore ndeyekubatanidza pulse width modulation (PWM) controller mu LED driver. Chiratidzo chePWM hachishandiswe zvakananga kudzora LED, asi kudzora switch, senge MOSFET, kupa magetsi anodiwa ku LED. PWM controller inowanzo shanda pa frequency yakatarwa uye inogadzirisa pulse width kuti ienderane ne duty cycle inodiwa. Mazhinji ma LED chips anoshandisa PWM kudzora LED emission. Kuti vanhu vasanzwe vachipenya, frequency yePWM pulse inofanira kunge iri kupfuura 100HZ. Chinhu chikuru chinobatsira pakudzora magetsi ePWM ndechekuti dimming current kuburikidza nePWM yakanyatsojeka, izvo zvinoderedza mutsauko wemavara kana LED ichiburitsa chiedza.

(4) AC drive

Zvichienderana nemashandisirwo akasiyana, madhiraivha eAC anogonawo kukamurwa kuita mhando nhatu: buck, boost, uye converter. Musiyano uripo pakati pedhiraivha yeAC nedhiraivha yeDC, pamusoro pekudiwa kwekugadzirisa nekusefa AC inopinzwa, panewo dambudziko rekupatsanurwa uye kusapatsanurwa kubva pakuona kwekuchengetedza.

Chinopinza AC chinoshandiswa zvakanyanya pamarambi ekugadzirisa: pamarambi gumi ePAR (Parabolic Aluminium Reflector, rambi rinowanzo shandiswa padanho rehunyanzvi), mababu akajairwa, nezvimwewo, anoshanda pa100V, 120V kana 230V AC. Pamurambi weMR16, unofanirwa kushanda pasi pe12V AC input. Nekuda kwemamwe matambudziko akaomarara, akadai sekugona kudzima kwestandard triac kana leading edge dimmers uye trailing edge dimmers, uye kushandira pamwe nema electronic transformers (kubva paAC line voltage kugadzira 12V AC yeMR16 lamp operation). Dambudziko rekushanda (ndiko kuti, kushanda kusina kupenya), saka, zvichienzaniswa neDC input driver, munda unobatanidzwa muAC input driver wakaoma zvikuru.

Simba reAC (mains drive) rinoshandiswa pa LED drive, kazhinji kuburikidza nematanho akadai se step-down, kugadzirisa, kusefa, voltage stabilization (kana current stabilization), nezvimwewo, kushandura simba reAC kuita DC power, uye wobva wapa ma LED akakodzera kuburikidza ne drive circuit yakakodzera. Operation current inofanira kunge iine high conversion efficiency, diki uye yakaderera mutengo, uye panguva imwe chete kugadzirisa dambudziko rekuchengetedzeka. Tichifunga nezve kukanganiswa kwe power grid, electromagnetic interference nematambudziko e power factor zvinofanirawo kugadziriswa. Kune ma LED ane simba shoma nepakati, circuit structure yakanakisa i single-end fly back converter circuit; kune high-power applications, bridge converter circuit inofanira kushandiswa.

-Kurongwa kwenzvimbo yekuisa simba:

Simba rekutyaira rinogona kukamurwa kuva simba rekunze uye simba rakavakirwa mukati zvichienderana nenzvimbo yekuisa.

(1) Simba rekunze

Sezvinoreva zita racho, simba rekunze rinoiswa kunze. Kazhinji, simba remagetsi rakawanda, izvo zvine njodzi kuvanhu, uye simba rekunze rinodiwa. Musiyano nemagetsi akavakirwa mukati ndewekuti simba remagetsi rine ganda, uye mwenje yemumugwagwa ndiyo yakajairika.

(2) Simba remagetsi rakavakirwa mukati

Simba remagetsi rinoiswa murambi. Kazhinji, magetsi acho akaderera, kubva pa12v kusvika pa24v, izvo zvisingakonzeri njodzi kuvanhu. Iri rambi rine mwenje yemabara.