Lub xeev ua haujlwm ntawm linear voltage regulator raj yog dab tsi?
Linear stabilized fais fab mov yog ib qho khoom siv hluav taws xob tsim uas tuaj yeem muab cov zis DC ruaj khov. Nyob rau hauv linear tswj fais fab mov, tus regulator yog ib qho ntawm cov khoom tseem ceeb, uas yog lub luag hauj lwm rau kev tswj cov input voltage thiab stabilizing cov zis voltage. Kho lub xeev ua hauj lwm ntawm tus regulator muaj ib qho tseem ceeb rau kev ua hauj lwm thiab stability ntawm tag nrho cov linear fais fab mov.
Magnified xeev:
Nyob rau hauv lub xeev amplified, kho qhov input voltage ntawm lub transistor yuav ua rau muaj kev hloov pauv nyob rau hauv cov zis voltage, uas yog ib qho tseem ceeb yuav tsum tau rau lub lag luam ntawm ib tug linear regulator fais fab mov. Nyob rau hauv lub xeev loj, lub input-output yam ntxwv nkhaus ntawm kev kho lub raj yog linear. Thaum cov input voltage nce, kho qhov transistor amplification yam yuav siv tau, thiab cov zis voltage kuj yuav nce raws li. Ntawm qhov tsis sib xws, thaum lub input voltage txo, cov zis voltage kuj yuav txo raws li. Lub xeev amplification yog ib txwm ua hauj lwm lub xeev ntawm kev kho lub raj, uas muaj peev xwm xyuas kom meej stability ntawm cov zis voltage.
Saturation xeev:
Thaum lub amplitude ntawm lub input voltage ntawm lub adjustable raj loj heev, lub adjustable raj yuav nkag mus rau lub saturation lub xeev. Nyob rau hauv lub xeev saturated, input-output yam ntxwv nkhaus ntawm lub adjustable raj nkag mus rau hauv kab rov tav cheeb tsam, thiab nyob rau hauv lub sij hawm no, lub adjustable raj tsis muaj peev xwm mus ntxiv amplify lub input teeb liab. Thaum lub input voltage ntau tshaj ib qho chaw pib, lub regulator yuav tsis muaj peev xwm muab ib tug ruaj khov tso zis voltage, uas ua rau fluctuations los yog instability ntawm cov zis voltage. Yog li ntawd, saturation xeev yog ib lub xeev uas yuav tsum tau zam thaum lub sij hawm ua hauj lwm ntawm lub regulating raj.
Hnub kawg raws li txoj cai:
Thaum lub amplitude ntawm lub input voltage ntawm lub adjustable raj me me dhau lawm, lub adjustable raj yuav nkag mus rau hauv lub xeev cutoff. Nyob rau hauv lub xeev txiav tawm, cov zis voltage ntawm input-output yam ntxwv nkhaus ntawm lub adjustable raj tseem yeej tsis hloov. Thaum lub input voltage qis dua ib qho chaw pib, lub regulator tsis tuaj yeem txuas ntxiv mus txuas ntxiv rau lub teeb liab input, thiab cov zis voltage yuav tsis ruaj khov. Yog li ntawd, lub xeev txiav tawm kuj yog ib lub xeev uas yuav tsum tau zam nyob rau hauv kev hloov ntawm kev tswj kev ua haujlwm.
Txhawm rau kom ntseeg tau tias lub raj hloov pauv nyob rau hauv lub xeev amplified thiab tswj kom muaj qhov tso zis hluav taws xob ruaj khov, qee qhov kev ntsuas feem ntau yuav tsum tau ua. Ntawm lawv, kev tawm tswv yim tsis zoo Circuit Court yog ib txoj hauv kev siv ntau. Cov tswv yim tsis zoo Circuit Court, los ntawm kev tsim tsim thiab kev hloov kho, pub rov qab qhov sib txawv teeb liab tsim los ntawm kev tawm tswv yim thiab cov zis ntawm qhov hloov pauv mus rau qhov chaw nkag ntawm lub raj hloov kho los ntawm lub voj voog tawm tswv yim tsis zoo, yog li suppressing tus cwj pwm tsis zoo ntawm lub raj hloov thiab tuav nws ruaj khov linear amplification yam ntxwv.
Tsis tas li ntawd, lub xeev kev ua haujlwm ntawm kev hloov kho lub raj kuj cuam tshuam los ntawm kev ruaj ntseg ntawm lub voj. Loop stability yog hais txog cov lus teb kaw ntawm cov lus tawm tswv yim ntawm lub regulator thiab cov load rau lub teeb liab input thiab stability ntawm cov zis voltage. Los ntawm kev siv lub voj voog tsim nyog thiab kev tawm tsam ntawm cov teeb meem cuam tshuam, kev ruaj ntseg ntawm tus tswj hwm tuaj yeem txhim kho, thiab kev ua haujlwm ntawm cov kab hluav taws xob tuaj yeem ua kom zoo dua ntxiv.
Hauv cov ntsiab lus, lub xeev ua haujlwm ntawm cov raj tswj kav hauv cov kab hluav taws xob tswj hluav taws xob muaj xws li amplification state, saturation state, thiab cutoff state. Lub xeev amplification yog ib txwm ua hauj lwm lub xeev ntawm kev kho lub raj, uas yuav xyuas kom meej lub stability ntawm cov zis voltage; Saturation thiab txiav tawm lub xeev yuav tsum zam kom ntau li ntau tau, vim tias lawv tuaj yeem ua rau muaj kev hloov pauv lossis tsis ruaj khov hauv cov zis hluav taws xob. Los ntawm kev siv cov kev ntsuas tsim nyog thiab cov qauv tsim, xws li optimizing qhov tsis zoo tawm tswv yim circuits thiab voj stability, stability thiab linear amplification yam ntxwv ntawm tus regulator tuaj yeem txhim kho, yog li ua tiav qhov ruaj khov linear tswj fais fab tso zis.
