Sei ma LED achi Flicker uye Sei Kuimisa
Ma LED anopenya kana chiedza chavo chichibuda. Kuchinja uku kunoitika nekuti dimmable light-emitting diodes ako akagadzirirwa kubatidza nekudzima nekumhanya kwakanyanya.
Pane zvikonzero zviviri zvikuru nei kuona strobo inogona kunzwika:
1. The goho ripple frequency yakaderera. Mumamiriro ezvinhu akakosha (semuenzaniso, nekukurumidza kupinda munzvimbo yechiedza kubva kunzvimbo isina-chiedza), iwe zvakare unonzwa strobe yakatenderedza 100Hz. Iyo yekare bhaisikopo furemu chiyero ndeye 24fps, asi kana iyo frequency yekuvhenekera iri Iyo flash frequency yakatenderedza 60Hz, uye munhu wese haagone kumira nazvo. Macomputer monitors uye maTV anobvisa yekare furemu chiyero system uye zviri nyore kunzwisisa.
2. Output ripple voltage kana ikozvino 100Hz inobuda ripple, kana ripple voltage iri pasi pe5%, hainzwi stroboscopic. Panguva ino, ripple yazvino inogona kunge iri diki pane 5%, uye kuita kwakati kwakaoma. Iyo furemu yenhare mbozha kana kamera inowanzo kutenderedza makumi matatu, uye yakakwirira-inomhanya inofamba kamera inogona kusvika 400fps. Kupfura nechiedza che strobe, kana strobe frequency isingapfuure 4 times fremu rate yakatarwa neyakapfura mudziyo, iwe uchaona mwenje uchipenya kana kutodedera pamudziyo wekupfura, uye mhedzisiro yekupfura zvakare yakafanana. Naizvozvo, kana uchipfura chiratidziro chekare cheCRT chekutarisa, iwe unowanzo kuona bara richikwira kumusoro. Iyo yakaderera frequency stroboscopic, kunyangwe isu hatigone kuzvinzwa pakarepo, asi muchiedza chenguva refu, vanhu vakaneta kwazvo, nyore kuwana myopia nezvimwe zvirwere zvemaziso.
Parizvino, magetsi e LED anogona kungozadzisa zvinodiwa pasina stroboscopic:
1. Wedzera kubuda kwe electrolytic capacitor
2. Kutora mupata wekuzadza passive PFC chirongwa
3. Kutora maviri-nhanho chirongwa (AC/DC, DC/DC)
Chirongwa chekutanga "chinowedzera kubuda kwe electrolytic capacitor", chirongwa ichi chinogona kufungidzira kushandisa electrolytic capacitor kutora chikamu che AC ripple, asi chiitiko chaicho chinotiudza kuti kana ripple control iri mukati meimwe siyana (10%), Ndiyo. zvakaoma kuti uwedzere kuideredza, kunze kwekunge iyo electrolytic capacitor inowedzerwa kumutengo pasina chero mutengo.
Nzira yechipiri ndeyekushandisa iyo mupata-yakazadzwa passive PFC chirongwa, inova zvakare yakanyanya kurapwa. Zvirongwa zvekuzviparadzanisa nevamwe zvinogona kushandisa chero musimboti kana IWATT (mhinduro yekutanga, iyo ikozvino yakanyanya kubviswa). Maviri mahombe capacitor uye matatu diode anoshandiswa pakugadzirisa simba chinhu. Nekuti kune hombe electrolytic capacitor kuseri kwebhiriji rectifier, iyo AC ripple inotorwa, uye iripo kuburikidza neinductor kana transformer kune yechipiri iDC.
Nzira yechitatu ndeyekutora chirongwa chezvikamu zviviri. Nekuwedzera DC / DC kune iripo yega magetsi emagetsi ekambani yedu, pesvedzero ye AC ripple inogona kubviswa zvachose. Magetsi paramita anogonawo kusangana zvizere nezvitupa zviyero. Nekudaro, iyi mhinduro ine kumwe kuwedzera kwemutengo. Inoda yakawedzera simba manejimendi chip uye mamwe maseketi ekutenderera, uye mutengo wakazara uchawedzera.