Yog vim li cas rau qhov tsis txaus tso zis voltage ntawm switching fais fab mov
1, Tshaj load tam sim no
Nws yog qhov ua tau tias lub load loj dhau lawm, tshaj qhov muaj peev xwm ntawm cov khoom siv hluav taws xob hloov hluav taws xob, vim tias qhov tso zis hluav taws xob ntawm lub zog hloov hluav taws xob yog qhov tseeb. Raws li cov lus nug tau taw qhia, lub zog tso zis tsuas yog 36W ntawm 12V3A. Yog hais tias lub load tam sim no ntau dua 3A, cov zis voltage yuav raug rub. Disconnect lub load thiab ntsuas qhov tso zis voltage ntawm lub switching fais fab mov. Yog hais tias qhov tso zis tseem txawv txav, nws muaj feem ntau yog tias nws yog ib qho txhaum ntawm lub zog hloov hluav taws xob; Yog tias qhov tso zis yog qhov qub, txuas lub hwj huam mov hauv koob nrog Ammeter los ntsuas seb qhov kev thauj khoom tam sim no loj dhau. Yog hais tias lub load tam sim no loj dhau lawm, nws yog vim qhov tsis txaus ntawm cov khoom siv hluav taws xob hloov hluav taws xob, thiab cov khoom siv hluav taws xob hloov pauv nrog cov zis loj dua tam sim no yuav tsum tau hloov. Yog tias qhov tso zis dhau los yog qhov qub, nws qhia tau hais tias muaj qhov luv luv lossis lwm yam txhaum hauv lub backend load, ua rau cov khoom siv tam sim no ntau dhau. Nws tseem tuaj yeem txuas nrog simulated load test nrog lub zog ntawm 4 Ω lossis siab dua thiab lub zog ntawm 12W. Yog tias cov zis yog qhov qub, tsis muaj teeb meem nrog lub zog hloov hluav taws xob; Yog tias qhov tso zis hluav taws xob qis qis, qhov ua txhaum sab hauv ntawm lub zog hloov hluav taws xob yuav txo qis lub peev xwm.
2, Tsawg input voltage
Lub input voltage ntau ntawm kev hloov fais fab mov yog qhov dav, feem ntau nyob ib ncig ntawm 100V ~ 240V. Nyob rau hauv ib txwm muaj, qhov input AC voltage yuav tsis qis dua 100V. Qhov teeb meem no tsis tshua muaj, thiab qhov input voltage tuaj yeem ntsuas tau. Nws tseem muaj peev xwm hais tias qhov input voltage tsawg vim yog qhov tsis zoo xws li kev sib cuag tsis zoo.
3, Internal txhaum ntawm hloov fais fab mov
Thaum tsis muaj qhov hluav taws xob tso tawm hluav taws xob tsawg lossis thaum tsis muaj qhov hluav taws xob tso tawm hluav taws xob feem ntau txuas nrog lub simulated load ntawm 3A, qhov hluav taws xob tsis tshua muaj, uas belongs rau qhov cuam tshuam hauv Circuit Court ntawm lub zog hloov hluav taws xob. Hloov cov khoom siv hluav taws xob feem ntau muaj cov khoom siv hluav taws xob sib nqus cuam tshuam cov lim dej (EMI), rectifier filtering circuits, fais fab hloov, PWM maub los circuits, lwm yam kev tawm tswv yim circuits, overvoltage / undervoltage tiv thaiv, overcurrent / short-circuit tiv thaiv circuits, thiab lwm yam.
Lub hauv paus ntsiab lus tseem ceeb yog thawj zaug hloov 220V AC lub zog rau hauv high-voltage DC fais fab tuag los ntawm kev kho, thiab tom qab ntawd hloov mus rau hauv high-frequency AC teeb liab los ntawm PWM mem tes dav modulation los ntawm lub zog tsav chips, hloov raj, thiab lwm yam. zaus transformers, thiab ces rectified kom tau DC voltage. Feem ntau ntawm cov zis terminals ntawm kev hloov cov khoom siv hluav taws xob yuav raug saib xyuas qhov hluav taws xob hauv lub sijhawm thiab cov lus pom los ntawm optocouplers, thiab tuaj yeem hloov kho lub sijhawm tiag tiag thaum qhov hluav taws xob siab lossis qis. Muaj peev xwm sab hauv Circuit Court faults vim tsis muaj qhov tso zis hluav taws xob ntawm qhov hloov hluav taws xob: kev puas tsuaj ntawm cov zis tawm tswv yim diode (luv luv Circuit Court lossis qis voltage stabilization tus nqi, thiab lwm yam), thiab deterioration ntawm lub tswv yim resistor (xws li R4 thiab R6 hauv daim duab saum toj no. ); Lub raj hloov ntawm tus thawj tswj kawg yog faulty; Thaum txheeb xyuas qhov ua rau lub zog tsav nti tsis ua haujlwm (PWM controller circuit), rectifier diode faults, high-frequency transformer faults, thiab lwm yam, yuav tsum tau ntsuas ib kauj ruam ntawm kev ntsuas thiab ntsuas.
