Kho cov kauj ruam ntawm kev tswj fais fab mov
1. Thaum kho cov khoom siv hluav taws xob hloov pauv, ua ntej siv lub tshuab ntsuas hluav taws xob los xyuas seb txhua qhov hluav taws xob puas tawg thiab luv luv.
Hloov cov khoom siv hluav taws xob
Xws li fais fab rectifier choj pawg, hloov raj, high-frequency high-power rectifier raj; seb lub zog siab zog resistor uas suppresses lub surge tam sim no yog tshuab. Tom qab ntawd xyuas seb qhov tsis kam ntawm txhua qhov chaw tso zis hluav taws xob yog qhov txawv txav. Yog tias cov khoom saum toj no puas lawm, lawv yuav tsum tau hloov.
2. Tom qab ua tiav thawj kauj ruam, nws tseem tsis tuaj yeem ua haujlwm li qub tom qab qhib lub hwj chim. Tom ntej no, xyuas lub hwj chim yam khoom module (PFC) thiab mem tes dav modulation module (PWM), sab laj cov ntaub ntawv tseem ceeb, thiab paub txog kev ua haujlwm thiab kev ua haujlwm ntawm txhua tus pin ntawm PFC thiab PWM module. Ib qho yuav tsum tau ua ua ntej rau nws cov modules ua haujlwm kom raug.
3. Tom qab ntawd, rau lub hwj huam mov nrog PFC Circuit Court, nws yog ib qho tsim nyog los ntsuas seb qhov voltage ntawm ob qho kawg ntawm lub lim capacitor yog li ntawm 380VDC. Yog tias muaj qhov voltage ntawm 380VDC, nws txhais tau tias PFC module ua haujlwm ib txwm. Siv qhov hluav taws xob tso zis davhlau ya nyob twg VR, pib tswj seb qhov hluav taws xob ntawm Vstart / Vcontrol lub davhlau ya nyob twg yog qhov qub, siv 220VAC / 220VAC kev rho tawm hluav taws xob los muab lub zog rau lub zog hloov hluav taws xob, siv lub oscilloscope los saib seb lub waveform ntawm PWM module CT davhlau ya nyob twg rau hauv av yog ib tug sawtooth yoj los yog daim duab peb sab nrog zoo linearity, xws li TL494 Lub CT davhlau ya nyob twg yog ib tug sawtooth yoj, thiab lub CT davhlau ya nyob twg ntawm FA5310 yog ib daim duab peb sab yoj. Seb lub waveform ntawm qhov tso zis davhlau ya nyob twg V0 yog ib qho kev txiav txim nqaim mem tes teeb liab.
Kho cov kauj ruam ntawm kev tswj fais fab mov
4. Nyob rau hauv kev xyaum ntawm kev hloov kho fais fab mov, ntau lub zog hloov khoom siv siv UC38 × × series 8-pin PWM Cheebtsam.
Hloov fais fab Adapter
Feem ntau ntawm cov fais fab mov tsis ua hauj lwm yog tshwm sim los ntawm kev puas tsuaj ntawm lub hwj chim mov pib resistor, los yog degradation ntawm nti kev ua tau zoo. Thaum R txiav tawm thiab tsis muaj VC, PWM tivthaiv tsis tuaj yeem ua haujlwm, thiab nws yog qhov tsim nyog los hloov cov resistor nrog tus nqi tsis kam raws li lub zog qub. Thaum pib tam sim no ntawm PWM tivthaiv nce, tus nqi ntawm R tuaj yeem txo kom txog thaum PWM tivthaiv tuaj yeem ua haujlwm ib txwm. Thaum kho lub GE DR fais fab mov, PWM module yog UC3843, thiab tsis muaj lwm yam txawv txav nyob rau hauv kev tshuaj xyuas. Tom qab txuas lub 220K resistor rau R (220K), PWM tivthaiv ua haujlwm thiab qhov tso zis hluav taws xob yog qhov qub. Qee lub sij hawm vim qhov tsis ua haujlwm ntawm qhov hluav taws xob, 5V voltage ntawm VR davhlau ya nyob twg yog 0V, thiab PWM tivthaiv tsis ua haujlwm. Thaum kho Kodak 8900 lub koob yees duab fais fab mov, thaum qhov no tshwm sim, tshem tawm cov hluav taws xob sab nraud txuas nrog VR lub davhlau ya nyob twg, thiab VR hloov ntawm 0V mus rau 5V, PWM tivthaiv ua haujlwm ib txwm, thiab cov zis hluav taws xob yog qhov qub.
5. Thaum tsis muaj qhov voltage ntawm 380VDC ntawm lub lim capacitor, nws txhais tau hais tias PFC Circuit Court tsis ua haujlwm li qub.
Kho cov kauj ruam ntawm kev tswj fais fab mov
Cov pins tseem ceeb ntawm PFC module yog lub zog nkag tus pin VC, pib tus pin Vstart / tswj, CT thiab RT tus pins thiab V{{0}} tus pin. Thaum kho lub koob yees duab Fuji 3000, tsis muaj 380VDC voltage ntawm lub lim capacitor ntawm lub rooj tsavxwm kuaj. VC, Vstart / tswj, CT thiab RT waveforms thiab V0 waveforms yog txhua yam, thiab tsis muaj V0 waveform nyob rau hauv qhov ntsuas qhov hluav taws xob hloov hluav taws xob hloov G. Txij li thaum FA5331 (PFC) yog cov khoom tivthaiv, muaj qhov sib txawv ntawm V0. davhlau ya nyob twg thiab lub rooj tsavxwm tom qab lub tshuab tau siv ntev. Vuam, V0 teeb liab tsis raug xa mus rau G ncej ntawm lub teb nyhuv raj. solder lub V0 davhlau ya nyob twg mus rau qhov chaw solder ntawm lub rooj tsavxwm, thiab siv ib tug multimeter los ntsuas qhov voltage ntawm lub lim capacitor rau 380VDC. Thaum Vstart / tswj qhov kawg yog qib qis, PFC tsis tuaj yeem ua haujlwm ib yam, thiab nws yog qhov tsim nyog los kuaj xyuas cov khoom siv hluav taws xob cuam tshuam uas nws cov terminals txuas nrog rau sab nraud.
