Diagnostic thiab txij nkawm ntsuas thaum ntsib switching power supply voltage output abnormality
Ua ntej, hloov hluav taws xob muab hluav taws xob tsis muaj cov khoom tsim tawm kev txawj ntse
Cov kev kuaj mob yuam kev thiab cov kauj ruam
Thawj txoj haujlwm ntawm hom kev kho qhov txhaum no yog los txiav txim seb qhov txhaum puas yog nyob rau hauv lub tshuab hloov raj, hloov raj puag lossis hloov raj. Txoj kev tshwj xeeb yog ntsuas cov khoom siv hluav taws xob thiab lub hauv paus voltage ntawm lub raj hloov. Tej zaum yuav muaj cov xwm txheej hauv qab no:
(1) Lub switching tube collector voltage yog 0v, 1.4 npaug qis dua lub mains. Lub switching tube tsis muaj qhov ua haujlwm voltage. Yog tias qhov hluav taws xob yog 1.4 npaug, nws txhais tau hais tias qhov hloov hluav taws xob sib txuas ua haujlwm yog qhov qub, uas txhais tau hais tias AC220V thiab rectifier lim Circuit Court ua haujlwm ib txwm.
(2) Lub hauv paus voltage ntawm lub raj hloov pauv yog 0V (nrog rau lub sijhawm pib). Qhov no qhia tau hais tias lub start-up Circuit Court tsis muab qhov pib-up (conductive) voltage mus rau lub hauv paus ntawm lub switching tube, los yog cov seem ntawm lub hauv paus thiab lub emitter puas lawm, thiab lub start-up Circuit Court thiab lub emitter ntawm lub emitter. lub raj hloov pauv thiab cov khoom siv cuam tshuam yuav tsum tau kuaj xyuas. Yog tias qhov hluav taws xob nyob nruab nrab ntawm 0.6 thiab 0.7 (nrog rau lub sijhawm hloov pauv), nws qhia tau hais tias qhov pib ntawm qhov hloov pauv thiab cov emitter thiab cov khoom siv yog qhov qub. Thaum qhov hluav taws xob siab tshaj 0.7V, nws qhia tau hais tias qhov pib Circuit Court yog qhov qub, tab sis cov emitter hlws ris ntawm lub raj hloov los yog nws cov khoom yog qhib-circuited los yog tus nqi kuj nce.
(3) Lub raj xa hluav taws xob muaj qhov ua tau zoo: qhov hluav taws xob ntawm lub hauv paus ntawm lub raj hloov pauv yog 0 6-0.7V, thiab qhov hluav taws xob ntawm cov khoom siv hluav taws xob ntau dua 250V, qhia tias lub raj hloov pauv muaj kev ua haujlwm. Tsis ua hauj lwm tshwm sim nyob rau hauv lub zoo tswv yim Circuit Court, nrog rau cov lus pom zoo resistor, capacitor, renewable diode thiab switching transformer zoo tswv yim winding thiab kev sib txuas ntawm lawv yuav tsum tau ua board.
Thib ob, kev hloov hluav taws xob hloov hluav taws xob instant voltage tso tawm overhaul cov txheej txheem
(1) txoj kev thauj khoom tsis raug (2) ntsuas seb cov khoom tiv thaiv puas puas (3) txoj kev txiav tawm (4) txoj kev buck. Ib qho ntawm thawj lub ntsiab lus yuav tsum tau hais txog cov neeg yaj hloov hluav taws xob hloov hluav taws xob muaj peev xwm thauj khoom muaj peev xwm, qhov taw tes no tuaj yeem hais tau raws li kev nyab xeeb thiab kev ua tiav ntawm kev ua tiav. Nws tuaj yeem hais tau tias cov neeg siv hluav taws xob hloov hluav taws xob muaj kev ua haujlwm siab, muaj kev nyab xeeb siab, tsis tshua muaj kev poob thiab lwm yam zoo, cov no yog qhov sib cais los ntawm kev txhawb nqa muaj zog. Ib yam li ntawd, lub peev xwm ua tau zoo ntawm Minfong hloov hluav taws xob yog sib cais los ntawm Minfong Electric txoj kev ua raws li kev nyab xeeb thiab kev ua raws li cov neeg siv khoom.
Txhua qhov kev ua haujlwm hauv Circuit buck nrhiav kom tau txoj kev. Tom qab txiav txim siab qhov twg ntawm qhov hloov hluav taws xob hloov pauv tsis raug los ntawm cov txheej txheem saum toj no, txoj kev tshuaj xyuas rau txhua ntu yog raws li hauv qab no:
(1) Txheeb xyuas qhov ntsuas pulse width modulation circuit thiab cov lus qhia zoo Circuit Court. Muaj ob txoj hauv kev los hloov cov electrolytic capacitor nyob rau hauv cov lus pom zoo ntawm cov khoom siv hluav taws xob hloov tam sim no, ib qho yog 0. 016UF0. 039uf capacitor tsis ua haujlwm tus nqi qis heev, thiab tuaj yeem txiav txim siab los ntawm kev kho dua tshiab. Lwm qhov yog electrolytic capacitor txog 10uF. Lub capacitor no tuaj yeem hloov ncaj qha thaum lub sijhawm kho dua.
(2) Thaum tsis muaj AC voltage regulator, rau over-voltage tiv thaiv tsis ua hauj lwm, rau kev nyab xeeb yog vim li cas, koj muaj peev xwm xub hloov lub Circuit Court tsim los ntawm lub mem tes dav modulation Circuit Court khiav hauj lwm voltage ntawm cov coj qhov chaw, uas yog, lim capacitors (los ntawm a ob peb microfarads rau 100uF electrolytic capacitors) kom pom seb qhov hloov hluav taws xob hloov pauv puas rov qab mus rau qhov qub.
