Tsim lub hauv paus ntsiab lus ntawm qhov tsis tu ncua voltage / tsis tu ncua tam sim no tso tawm ib nti hloov hluav taws xob
Nws cov yam ntxwv yog tias nws muaj ob lub voj voog tswj, ib qho yog lub voj voog tswj hluav taws xob thiab lwm qhov yog lub voj voog tswj tam sim no. Thaum cov zis tam sim no me me, qhov ntsuas hluav taws xob tswj lub voj voog ua haujlwm thiab muaj cov yam ntxwv ntawm qhov hluav taws xob ruaj khov, uas yog sib npaug rau qhov hluav taws xob tas li; Thaum cov zis tam sim no mus txog los yog nce mus txog tus nqi ntsuas, IO tau khaws cia tas li los ntawm lub voj voog tswj tam sim no, uas dhau los ua qhov chaw tas li. Cov khoom siv fais fab no tshwj xeeb yog tsim rau cov roj teeb chargers thiab cov tsav tsheb tshwj xeeb. Cov nram qab no qhia txog qhov tsis tshua muaj nqi hluav taws xob / qhov hluav taws xob tsis tu ncua hloov hluav taws xob hloov hluav taws xob, nws lub voj voog tswj tam sim no yog tsim los ntawm transistors, nrog rau ib qho yooj yim Circuit Court, tsis tshua muaj nqi, thiab kev tsim khoom yooj yim.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm qhov hluav taws xob tsis tu ncua / tsis tu ncua tam sim no tso zis hloov hluav taws xob
Lub Circuit Court ntawm ib tug 7-5V, 1A qhov voltage / tas li tam sim no tso zis switching fais fab mov yog qhia nyob rau hauv daim duab 1. Nws txais ib tug TOP200Y switching power supply (IC1) thiab yog nruab nrog ib tug PC817A linear optocoupler (IC2). Lub 85V ~ 256V AC input voltage u yog lim los ntawm EMI lim L2, C6, rectifier choj (BR), thiab input lim capacitor (C1) kom tau txais DC high voltage UI ntawm kwv yees li 82V ~ 375V. Tom qab ntawd nws txuas nrog rau qhov ntws ntawm TOP200Y los ntawm thawj winding. Lub qhov hluav taws xob tiv thaiv hluav taws xob tsim los ntawm VDZ1 thiab VD1 txwv lub ncov voltage tsim los ntawm cov xau inductance ntawm high-frequency transformer mus rau ntau yam * *. VDZ1 txais yuav BZY97 C200 hloov hluav taws xob hloov hluav taws xob, nrog lub clamping voltage UB=200V. VD1 txais UF4005 ultra ceev rov qab diode. Qhov thib ob voltage yog rectified thiab lim los ntawm VD2 thiab C2, thiab ces lim los ntawm L1 thiab C3 kom tau ntxiv 7.5V tso zis. VD2 txais 3A / 70V Schottky diode. Cov zis hluav taws xob ntawm cov lus teb winding yog lim los ntawm VD3 thiab C4 rectification kom tau txais kev tawm tswv yim voltage ntawm UFB=26V, muab kev tsis ncaj ncees rau cov photosensitive transistor. C5 yog lub bypass capacitor, uas kuj ua raws li qhov zaus them nyiaj capacitor thiab txiav txim siab tsis siv neeg rov pib dua zaus. R2 yog qhov tsis tseeb ntawm cov lus tawm tswv yim winding, uas tuaj yeem txwv qhov kev tawm tswv yim voltage UFB kom tsis txhob nce thaum tsis muaj load.
Cov khoom siv hluav taws xob no muaj ob lub voj voog tswj. Lub voj voog tswj hluav taws xob yog tsim los ntawm 1N5234B hom 6.2V voltage regulator (VDZ2) thiab optocoupler PC817A (IC2). Nws txoj haujlwm yog ua kom lub zog hloov hluav taws xob ua haujlwm hauv qhov hluav taws xob tsis tu ncua thaum cov zis tam sim no me me. Lub sijhawm no, muaj tam sim no dhau los ntawm VDZ2, thiab qhov tso zis hluav taws xob tau txiav txim siab los ntawm tus nqi hluav taws xob ruaj khov (UZ2) ntawm VDZ2 thiab qhov kev poob qis rau pem hauv ntej (UF) ntawm LED hauv optocoupler. Lub voj tswj tam sim no yog tsim los ntawm transistors VT1 thiab VT2, tam sim no nrhiav tau resistor R3, optocoupler IC2, resistors R4-R7, thiab capacitor C8. Ntawm lawv, R3 tau mob siab rau txhawm rau txheeb xyuas tus nqi tam sim no. VT1 txais 2N4401 NPN silicon raj, thiab cov qauv hloov hauv tsev yog 3DK4C; Rau VT2, xaiv 2N4403 PNP silicon raj, uas tuaj yeem hloov tau los ntawm domestic 3DK9C. R6 thiab R5 yog siv los teeb tsa tus nqi tam sim no IC1 thiab IC2 rau VT1 thiab VT2, feem. R5 kuj txiav txim siab qhov nce DC ntawm lub voj tswj tam sim no. C8 yog ib tug Zaus them nyiaj capacitor los tiv thaiv lub voj los ntawm tus kheej oscillation. Thaum tsuas yog powered on los yog cia li restarted
