Yog vim li cas rau qhov tsis txaus tso zis voltage ntawm switching fais fab mov
Ua ntej, lub load tam sim no loj dhau, qhov thib ob yog qhov tsis tshua muaj hluav taws xob input, thiab qhov thib peb yog qhov tsis ua haujlwm sab hauv ntawm kev hloov hluav taws xob. Peb qhov laj thawj no yuav ua rau muaj teeb meem ntawm qhov tsis txaus tso zis hluav taws xob ntawm lub zog hloov hluav taws xob.
1. Lub load tam sim no loj heev
Yog hais tias lub load loj dhau lawm, nws tshaj lub peev xwm ntawm lub zog hloov hluav taws xob. Lub zog tso zis ntawm lub zog hloov pauv yog qhov tseeb, xws li 12V3A, thiab lub zog tso zis tsuas yog 36W. Yog hais tias lub load tam sim no ntau dua 3A, cov zis voltage yuav raug rub.
Disconnect lub load thiab tom qab ntawd ntsuas qhov tso zis voltage ntawm lub zog hloov hluav taws xob. Yog tias qhov tso zis tseem txawv txav, nws yog qhov feem ntau yog qhov txhaum ntawm lub zog hloov hluav taws xob; Yog hais tias cov zis yog ib txwm, txuas lub hwj chim mov nyob rau hauv series nrog ib tug ammeter los ntsuas seb lub load tam sim no loj heev. Yog hais tias lub load tam sim no loj heev, nws belongs rau lub switching fais fab mov. Yog tias cov zis hluav taws xob tsis txaus, nws yog qhov tsim nyog los hloov cov khoom siv hluav taws xob hloov nrog cov zis tam sim no loj dua.
Yog hais tias qhov tso zis yog ib txwm ua ntej, nws txhais tau hais tias lub back-kawg load muaj ib tug luv luv Circuit Court thiab lwm yam faults, ua rau cov load tam sim no ntau heev. Los yog txuas 4Ω lub zog siab dua 12W los simulate load test, yog tias cov zis yog qhov qub, lub zog hloov pauv tsis muaj teeb meem; Yog tias qhov tso zis hluav taws xob tsawg, qhov kev ua txhaum sab hauv ntawm lub zog hloov hluav taws xob yuav txo qhov muaj peev xwm thauj khoom.
Qhov thib ob, qhov input voltage yog tsawg
Lub input voltage ntau ntawm kev hloov fais fab mov yog dav, feem ntau txog 100V ~ 240V. Nyob rau hauv ib txwm muaj, qhov input AC voltage yuav tsis qis dua 100V. Qhov xwm txheej no tsis tshua muaj. Koj tuaj yeem ntsuas qhov input voltage. Nws kuj yuav tshwm sim los ntawm kev ua txhaum xws li kev sib cuag tsis zoo. Voltage yog tsawg.
3. Internal txhaum ntawm switching fais fab mov
Qhov tsis muaj-load output voltage yog tsawg los yog tsis muaj-load output voltage yog qhov qub. Thaum qhov hluav taws xob tsis tshua muaj thaum lub 3A analog load txuas nrog, nws yog nyob rau hauv qhov tsis ua haujlwm ntawm lub zog hloov hluav taws xob.
Cov khoom siv hluav taws xob hloov hluav taws xob feem ntau muaj cov khoom siv hluav taws xob cuam tshuam hluav taws xob (EMI), lub tshuab lim hluav taws xob rectifier, lub hwj chim hloov raj, PWM maub los Circuit Court, sab nraud tawm tswv yim circuit, overvoltage thiab undervoltage tiv thaiv, thiab overcurrent thiab luv Circuit Court tiv thaiv circuits.
Lub hauv paus ntsiab lus ntawm kev hloov fais fab mov: thawj zaug hloov 220V alternating tam sim no rau hauv high voltage ncaj qha tam sim no los ntawm rectification, ces hloov PWM mem tes dav hloov mus rau hauv siab zaus alternating tam sim no teeb liab los ntawm lub hwj chim tsav nti, hloov raj, thiab lwm yam, tso zis los ntawm high zaus transformer, thiab tom qab ntawd kho kom tau txais qhov hluav taws xob ncaj qha tam sim no, Feem ntau ntawm cov khoom siv hluav taws xob hloov pauv yuav saib xyuas qhov hluav taws xob hauv lub sijhawm, thiab cov lus tawm tswv yim los ntawm optocoupler, uas tuaj yeem hloov kho lub sijhawm tiag tiag thaum qhov hluav taws xob siab lossis qis.
Thaum cov zis hluav taws xob ntawm lub zog hloov hluav taws xob qis qis, qhov cuam tshuam hauv Circuit Court feem ntau yog: qhov tsis zoo ntawm Zener diode ntawm cov zis tawm tswv yim davhlau ya nyob twg (luv luv Circuit Court lossis qis voltage regulator tus nqi, thiab lwm yam), deterioration ntawm lub tswv yim resistor (xws li. R4 thiab R6 hauv daim duab saum toj no); Tube tsis ua hauj lwm; fais fab tsav nti tsis ua hauj lwm (PWM maub los Circuit Court), rectifier diode tsis ua hauj lwm, high-frequency transformer tsis ua hauj lwm, thiab lwm yam.
Tom qab ntawd, thaum nrhiav qhov tsis ua hauj lwm ua rau lub zog hloov pauv, nws yog ib qho tsim nyog los ntsuas thiab txheeb xyuas cov kauj ruam los ntawm kauj ruam.
