Circuit Principle Analysis ntawm Transistor Regulated Power Supply
Ib qho yog transistor shunt tswj fais fab mov. Qhov twg T1 yog tus regulator, D1 yog tus siv regulator, R1 yog tam sim no limiting resistor ntawm D1, R2 yog tam sim no limiting resistor, R3 yog lub load. Cov zis hluav taws xob ntawm qhov hluav taws xob hluav taws xob hluav taws xob hluav taws xob no yog kwv yees sib npaug ntawm tus nqi tswj hwm ntawm D1 regulator (ua tau ntxiv T1 emission junction voltage, feem ntau germanium raj coj 0.3V, silicon raj coj 0.7V ). Qhov no yog vim lub hwj chim mov hauv kev ua haujlwm, T1 emitter junction conduction, emitter voltage thiab base voltage kom zoo ib yam, thaum lub hauv paus voltage yog stabilized los ntawm D1 ntawm tus nqi ruaj. Qhov Circuit Court no tuaj yeem suav tias yog T1 yuav yog D1 voltage regulator amplified lub sij hawm, sib npaug rau kev nkag mus rau tus nqi tswj hwm rau D1 tus nqi, qhov voltage regulator effect yog lub sij hawm cov nyhuv ntawm D1 voltage regulator.
Lub Circuit Court ua haujlwm raws li hauv qab no:
UI↑ → UD1↑ →(UT1)EC↑ →(IT1)EC↑ →IR2↑→UR2↑→(UT1)EC↑
UI↓ → UD1↓ →(UT1)EC↓ →(IT1)EC↓ →IR2↓ →UR2↓ →(UT1)EC↑
Cov khoom xaiv rau transistorized voltage regulator
Cov kauj ruam rau kev xaiv cov khoom siv rau qhov Circuit Court no zoo ib yam li cov khoom siv hluav taws xob sib txuas hluav taws xob nrog silicon regulator, feem ntau yog los ntawm cov hauv qab no.
(1) Kev xaiv thawj zaug ntawm regulator T1 thiab voltage regulator D1
Thaum xaiv tus regulator T1, lub ntsiab kev txiav txim siab yog tias nws qhov ntsuas tam sim no ICM yuav tsum ntau dua li cov zis tam sim no IO, txhawm rau xyuas kom meej tias tus tswj hwm yuav tsis raug puas tsuaj los ntawm ntau dhau tam sim no thaum lub load qhib. Tsis tas li ntawd, txhawm rau kom ntseeg tau tias lub raj hloov kho muaj qhov zoo ntawm kev hloov kho, tab sis kuj yuav tsum muaj tus nqi loj, me me xau tam sim no. Kev xaiv ntawm regulator D1, lub ntsiab kev txiav txim siab ntawm nws cov stabilization voltage thiab cov sum ntawm T1 emitter junction voltage yuav tsum sib npaug zos rau cov zis voltage.
(2) Xaiv qhov input voltage
Txhawm rau kom ntseeg tau tias qhov ua tau zoo ntawm cov khoom siv hluav taws xob tau tswj hwm, cov khoom siv hluav taws xob feem ntau tsis siab dhau, tsis ntau tshaj 2 UI yog qhov tsim nyog.
(3) Xaiv qhov txwv tam sim no resistor R2
Rau qhov sib npaug voltage regulator Circuit Court, tam sim no limiting resistor R2 yog tus yuam sij rau tag nrho Circuit Court ua hauj lwm zoo los yog tsis. R2 xaiv ib tug loj, qhov voltage regulator nyhuv yog zoo dua, tab sis lub hwj chim noj yog loj (vim hais tias lub resistor zog noj P=I2R), thaum yuav tsum tau lub input voltage nce, lub hwj chim mov efficiency kuj tsawg. Cov kev suav tshwj xeeb tuaj yeem raug xa mus rau theem peb ntawm silicon voltage regulator parallel voltage regulator circuit Cheebtsam xaiv.
(4) Txheeb xyuas Circuit Court stability
Kev ruaj ntseg ntawm tag nrho cov Circuit Court yuav tsum tau txiav txim siab raws li qhov yuav tsum tau muaj ntawm qhov tseeb Circuit Court, yog tias qhov ruaj khov tsis txaus, koj tuaj yeem nce R1 thiab UI kom tsim nyog, koj tuaj yeem xaiv tus nqi loj dua, me me xau tam sim no regulator raj.
