Kho cov kauj ruam rau kev tswj fais fab mov
Kho cov kauj ruam rau kev tswj fais fab mov
1. Thaum kho cov khoom siv hluav taws xob hloov pauv, ua ntej siv lub tshuab hluav taws xob los xyuas seb txhua lub hwj chim puas muaj qhov tawg lossis luv luv,
Hloov cov khoom siv hluav taws xob
Xws li fais fab rectifier choj pawg, hloov raj, high-frequency high-power rectifier raj; Yog lub siab-lub zog resistor uas suppresses surge tam sim no burnt tawm. Xyuas seb qhov tsis kam ntawm txhua qhov tso zis hluav taws xob qhov chaw nres nkoj yog qhov txawv txav dua. Yog hais tias cov khoom saum toj no puas lawm, lawv yuav tsum tau hloov.
2. Tom qab thawj kauj ruam ua tiav, yog tias lub hwj chim tau qhib thiab nws tseem tsis tuaj yeem ua haujlwm tau zoo, ces yuav tsum tau kuaj xyuas cov khoom siv fais fab (PFC) thiab pulse width modulation component (PWM), cov ntaub ntawv tseem ceeb yuav tsum tau sab laj, thiab kev ua haujlwm ntawm txhua tus pin ntawm PFC thiab PWM modules thiab cov xwm txheej tsim nyog rau lawv txoj haujlwm ib txwm yuav tsum paub.
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. Tom qab ntawd, nws yog ib qho tsim nyog los kuaj xyuas lub xeev ua haujlwm ntawm PWM module, ntsuas nws lub zog hluav taws xob nkag davhlau ya nyob twg VC, siv hluav taws xob hluav taws xob tso tawm davhlau ya nyob twg VR, pib thiab tswj lub Vstart / Vcontrol davhlau ya nyob twg voltage, thiab siv 220VAC / 220VAC cais transformer los muab lub zog rau lub Hloov fais fab mov, Siv lub oscilloscope los soj ntsuam seb lub waveform ntawm PWM module CT kawg rau hauv av yog Sawtooth yoj yoj los yog daim duab peb sab yoj nrog zoo linearity. Piv txwv li, TL494 CT kawg yog Sawtooth yoj yoj, thiab FA5310 CT kawg yog daim duab peb sab yoj. Yog lub waveform ntawm cov zis V0 ib qho kev txiav txim nqaim mem tes teeb liab.
Kho cov kauj ruam rau kev tswj fais fab mov
4. Hauv kev saib xyuas cov khoom siv hluav taws xob hloov pauv, ntau lub zog hloov hluav taws xob siv UC38 × × Series 8-pin PWM cov khoom,
ACDC Adapt
Cov khoom siv hluav taws xob feem ntau tsis ua haujlwm vim tias qhov pib ua haujlwm ntawm lub zog hluav taws xob puas lossis kev ua haujlwm ntawm cov nti txo qis. Thaum tsis muaj VC tom qab R Circuit tawg lawm, PWM tivthaiv tsis tuaj yeem ua haujlwm thiab yuav tsum tau hloov nrog lub resistor nrog tib lub zog tiv thaiv tus nqi raws li qhov qub. Thaum pib tam sim no ntawm PWM tivthaiv nce, tus nqi R tuaj yeem raug 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 pom muaj lwm yam txawv txav. Tom qab txuas lub 220K resistor rau R (220K), PWM tivthaiv ua haujlwm thiab qhov tso zis hluav taws xob zoo li qub. Qee lub sij hawm, vim muaj qhov tsis zoo ntawm qhov hluav taws xob, 5V voltage ntawm VR kawg yog 0V, thiab PWM tivthaiv tsis ua haujlwm. Thaum kho lub zog ntawm lub koob yees duab Kodak 8900, qhov teeb meem no tau ntsib. Sab nraud Circuit Court txuas nrog VR kawg yog txiav, thiab VR hloov ntawm 0V mus rau 5V. PWM tivthaiv ua haujlwm ib txwm ua thiab cov zis hluav taws xob yog qhov qub.
5. Thaum tsis muaj qhov hluav taws xob nyob ib puag ncig 380VDC ntawm lub lim dej capacitor, nws qhia tau tias PFC Circuit Court tsis ua haujlwm zoo,
Kho cov kauj ruam rau kev tswj fais fab mov
Schematic daim duab ntawm lub hwj chim mov Circuit Court
Cov pins tseem ceeb ntawm PFC module yog lub zog nkag tus pin VC, pib tus pin Vstart / tswj, CT thiab RT pins, thiab V{{0}} tus pin. Thaum kho lub koob yees duab Fuji 3000, sim tias tsis muaj 380VDC voltage ntawm lub lim capacitor ntawm ib lub rooj tsavxwm. VC, Vstart / tswj, CT, RT waveforms, thiab V0 waveforms yog txhua yam, tab sis tsis muaj V0 waveform ntawm G-ncej ntawm qhov ntsuas hluav taws xob hloov hluav taws xob vim FA5331 (PFC)
