1. Lapho silungisa isiphakeli samandla sesikrini sesibonisi se-LED, okokuqala sidinga ukusebenzisa i-multimeter ukuze sithole ukuthi ingabe kukhona isifunda esifushane sokuhlukana kudivayisi ngayinye yamandla, njengebhuloho lokulungisa amandla, ishubhu lokushintsha, ishubhu yokulungisa amandla aphezulu enemvamisa ephezulu. , kanye nokuthi ingabe isivimbeli samandla aphezulu esicindezela amandla okushisa sishisiwe yini.Bese, sidinga ukuthola ukuthi ingabe ukumelana kwembobo ngayinye ye-voltage okukhiphayo akujwayelekile.Uma izisetshenziswa ezingenhla zonakalisiwe, sidinga ukufaka ezintsha esikhundleni sazo.

2. Ngemva kokuphothula lezi zivivinyo ezingenhla, uma ugesi uvuliwe futhi ungasakwazi ukusebenza kahle, sidinga ukuhlola imojula yesici samandla (PFC) kanye nengxenye ye-pulse width modulation (PWM), sibuyekeze ulwazi olufanele, futhi sizijwayeze nayo. imisebenzi yephinikhodi ngayinye yamamojula e-PFC ne-PWM kanye nezimo ezidingekayo zokusebenza kwawo okuvamile.

3. Ngokunikezwa kwamandla ngesekethe ye-PFC, kuyadingeka ukukala ukuthi i-voltage emikhawulweni yomibili ye-capacitor yesihlungi imayelana ne-380VDC.Uma kukhona i-voltage engaba ngu-380VDC, kubonisa ukuthi imojula ye-PFC isebenza ngokujwayelekile.Ngemuva kwalokho, kuyadingeka ukuthola isimo sokusebenza semojula ye-PWM, ukukala i-terminal yayo yokufaka amandla engu-VC, i-terminal voltage yereferensi ye-VR, qala futhi ulawule i-Vstart/Vcontrol terminal voltage, futhi usebenzise i-220VAC/220VAC isolation transformer ukuze unikeze amandla ku-led. isikrini sokubonisa, Sebenzisa i-oscilloscope ukuze ubone ukuthi i-waveform ye-PWM module CT igcina phansi iyigagasi le-Sawtooth wave noma igagasi elingunxantathu elinokuhambisana okuhle.Isibonelo, isiphetho se-TL494 CT igagasi le-Sawtooth, futhi isiphetho se-FA5310 CT singunxantathu wamagagasi.Ingabe i-waveform yokuphuma kwe-V0 iyisignali e-ode ye-pulse ewumngcingo.

4. Ezenzweni zokunakekela ukunikezwa kwamandla kwesikrini sesibonisi se-LED, izinto eziningi zamandla ezibonisiwe zesikrini se-LED zisebenzisa i-UC38×& Times;Iningi lezingxenye ze-PWM ezingu-8-pin ochungechungeni alusebenzi ngenxa yokulimala kokuqala kokumelana nokunikezwa kwamandla noma ukwehla kokusebenza kwe-chip.Uma ingekho i-VC ngemva kokwephulwa kwesekethe engu-R, ingxenye ye-PWM ayikwazi ukusebenza futhi idinga ukushintshwa ngesiphikisayo esinenani elifanayo lokumelana namandla njengelokuqala.Lapho isiqalo samanje sengxenye ye-PWM sikhuphuka, inani lika-R lingancishiswa kuze kube ingxenye ye-PWM ikwazi ukusebenza ngokujwayelekile.Lapho kulungiswa ugesi we-GE DR, imojula ye-PWM yayiyi-UC3843, futhi akukho okunye okungavamile okutholakele.Ngemva kokuxhuma i-resistor engu-220K ku-R (220K), ingxenye ye-PWM yasebenza futhi i-voltage ephumayo yayivamile.Ngezinye izikhathi, ngenxa yamaphutha esifunda se-peripheral, i-voltage engu-5V ekugcineni kwe-VR ingu-0V, futhi ingxenye ye-PWM ayisebenzi.Lapho kulungiswa ukunikezwa kwamandla kwekhamera ye-Kodak 8900, lesi simo sihlangabezana naso.Isifunda sangaphandle esixhunywe ekugcineni kwe-VR siyanqanyulwa, futhi i-VR iyashintsha isuka ku-0V iye ku-5V.Ingxenye ye-PWM isebenza ngokujwayelekile futhi i-voltage ephumayo ijwayelekile.

5. Uma ingekho i-voltage ezungeze i-380VDC ku-capacitor yokuhlunga, kubonisa ukuthi isekethe ye-PFC ayisebenzi kahle.Izikhonkwane zokuthola ukhiye wemojula ye-PFC iphinikhodi yokufaka amandla engu-VC, iphinikhodi yokuqalisa i-Vstart/control, i-CT ne-RT pin, namaphinikhodi angu-V0.Lapho ulungisa ikhamera ye-Fuji 3000, hlola ukuthi ayikho i-voltage engu-380VDC ku-capacitor yesihlungi ebhodini elilodwa.I-VC, i-Vstart/control, i-CT ne-RT waveforms kanye nama-V0 waveforms ajwayelekile.Alukho uhlobo lwegagasi lwe-V0 esigxotsheni se-G seshubhu yokushintsha amandla omphumela wenkundla yokulinganisa.Njengoba i-FA5331 (PFC) iyisici se-patch, ngemva kwesikhathi eside sokusetshenziswa komshini, kuba khona ukuthengiswa okungalungile phakathi kwesiphetho se-V0 nebhodi, futhi isignali ye-V0 ayithunyelwa ku-G pole ye-Field-effect transistor. .Weld isiphetho se-V0 ekuhlanganyeleni kwe-solder ebhodini, futhi usebenzise i-multimeter ukuze ulinganise i-voltage engu-380VDC ye-capacitor yokuhlunga.Uma itheminali ye-Vstart/control isezingeni eliphansi lamandla futhi i-PFC ingakwazi ukusebenza, kuyadingeka ukuthola amasekhethi afanelekile axhunywe kuma-periphery ekugcineni kwawo.