Dab tsi yog lub luag haujlwm ntawm qhov hluav taws xob tswj lub raj hauv DC fais fab mov?
Lub DC fais fab mov voltage tseem nyob tas li tsis hais txog ntawm qhov load, raws li paub zoo thaum tham txog lub tswv yim ntawm lub tshuab hluav taws xob hluav taws xob. Uas yog hais, lub hwj chim mov voltage nyob twj ywm ntawm tus tsim nqi txawm hais tias lub load tam sim no txawv li cas. Yog li koj yuav tsum paub txog cov hauv qab no.
Zigzag diode
Lub Zener diode, tseem hu ua ZENER diode, ua haujlwm hauv lub xeev rov qab, raws li pom hauv daim duab saum toj no. Reverse bias voltage (VR) nce ua rau qhov rov qab tam sim no (IR) nce zuj zus; Txawm li cas los xij, qhov rov qab tam sim no nce sai sai thaum qhov rov qab tsis zoo voltage nce mus txog tus nqi tshwj xeeb, lossis qhov hluav taws xob tawg. Qhov rov qab tam sim no nyob ruaj khov tam sim no. Ze li ntawm qhov tawg voltage VZ yog qhov voltage ntawm qhov voltage regulator ob feem. Lub sijhawm no, qhov voltage tsis txawv ntawm txhua qhov, txawm tias qhov hloov pauv tam sim no npaum li cas. Qhov no yog qhov voltage regulator raj lub hauv paus ntsiab lus ntawm voltage stability.
Xav tias qhov hloov pauv tam sim no loj hlob thiab qhov voltage U1 thoob plaws lub lim capacitor C nce thaum lub load voltage U0 ruaj khov ntawm qhov tawg voltage VZ ntawm lub voltage regulator raj. Qhov voltage regulator raj lub volt-ampere yam ntxwv nce raws li qhov load voltage U0 zoo li. Raws li tuaj yeem pom, muaj qhov pom tseeb ntawm qhov tam sim no ntws los ntawm qhov hluav taws xob tswj lub raj ntawm qhov taw tes no. Qhov no ua rau muaj qhov nce hauv qhov hluav taws xob poob thoob plaws qhov tam sim no limiting resistor R, uas txo cov load voltage thiab mus txog qhov voltage regulator raj lub breakdown voltage VZ thiaj li mus txog equilibrium.Tshaj qhov scenario thaum alternating tam sim no te kuj ua tau. Ob qho tib si load voltage U0 thiab tam sim no dhau los ntawm qhov voltage regulator raj tam sim no qis dua. Yog li ntawd, lub load voltage nce raws li qhov voltage poob thoob plaws tam sim no limiting resistor R poob. Tom qab tau nyob ze rau qhov voltage regulator tube qhov tawg voltage (VZ), nws mus txog qhov sib npaug.
