Cov hau kev thiab cov txheej txheem rau kev hloov hluav taws xob kev kho
1. Thaum kho tau lub tshuab hloov hluav taws xob, ua ntej siv ntau txoj kev tshawb xyuas seb txhua lub zog tivthaiv tau tawg lossis luv yeeb. Lub casing ntawm cov hloov hluav taws xob pawg, hloov raj, thiab siab} zaus siab siab, yuav tsum tau kuaj xyuas; Puas muaj siab - Lub zog tiv thaiv fais fab uas suppresses tawm ntawm nroo tawm. Rov ntsuam xyuas seb puas kam ntawm txhua tso zis voltage yog txawv txav. Yog hais tias cov cheebtsam saum toj no puas, lawv yuav tsum tau hloov.
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3. Tom qab ntawd, rau cov khoom siv fais fab nrog PFC circuits, nws yog qhov tsim nyog los ntsuas seb tus hluav taws xob feem ntau ntawm lub taub lim hluav taws xob yog ib ncig ntawm 380VDC. Yog tias muaj qhov hluav taws xob ntawm ib ncig ntawm 380VDC, nws qhia tau tias PFC module ua haujlwm tau zoo. Tom ntej no, kev ua haujlwm ntawm PWM tivthaiv yog tshuaj xyuas, thiab lub hwj chim cov lus qhia davhlau ya nyob twg los pib tswj cov vstartart / VControl Terminal voltage. Siv 220Vac / 220VAC rho transformer kom muab lub zog rau lub tshuab hloov hluav taws xob. Siv ib qho oscilloscope saib seb puas muaj cov nthwv dej ntawm lub pas dej ntawm lub davhlau ya nyob dav hlau yog ib daim duab peb sab. Piv txwv li, TL494 CT lub davhlau ya nyob twg yog Sedtooth nthwv dej, thiab FA5310 CT lub davhlau ya nyob twg yog Wave Wave. Yog cov nthwv dej ntawm cov zis tawm v0 ib qho kev txiav txim nqaim mem tes. Kev Txij Nkawm Txoj Kev thiab Cov Tswv Yim Rau Hloov Khoom Siv Hluav Taws Xob
4. Hauv kev xyaum hloov kho hom hwj huam hloov chaw, ntau lub zog hom fais fab siv siv UC38 XXX series 8-PIN PWM Cheebtsam. Feem ntau hloov hom PowerSrers tsis tuaj yeem ua haujlwm vim tias lub zog pib resistor yog puas los yog cov nti ua kom txo qis. Thaum tsis muaj VC tom qab R Circuit Court breaker, cov neeg ua haujlwm ntawm PWM tsis tuaj yeem ua haujlwm thiab xav tau hloov nrog lub zog tiv taus zoo li qub. Thaum pib tam sim no ntawm PWM tivthaiv nce, tus nqi r muaj peev xwm yuav raug txo kom txog thaum lub PWM tivthaiv tuaj yeem ua haujlwm ib txwm. Thaum kho tau ib qho GE ROG FOG KHOOM, PWM Module yog UC3843 thiab tsis muaj lwm yam kev txawv txav tau raug kuaj pom. Tom qab txuas lub 220k resistor rau r (220k), lub PWM tivthaiv ua haujlwm thiab cov zis hluav taws xob yog qhov qub. Qee zaum, vim muaj kev ua yuam kev ncig ua yuam kev, VR Terminal's 5V voltage yog 0V thiab lub PWM tivthaiv tsis ua haujlwm. Thaum kho lub kodak 8900 lub zog fais fab mov, yog tias cov teeb meem sab nraud txuas nrog VR terminal tau sib txuas, thiab VR hloov ntawm 0V rau 5V. Lub PWM tivthaiv ua haujlwm ib txwm muaj thiab cov zis hluav taws xob yog qhov qub.
