Switching fais fab mov fault detection txoj kev
Tom qab kev nkag siab yooj yim ntawm kev hloov hluav taws xob hloov pauv, cia peb saib cov kev ua txhaum thiab kho txoj hauv kev.
Ua ntej ntawm tag nrho cov, koj yuav tsum saib seb lub hwj chim mov fuse puas puas. Yog hais tias lub fuse puas lawm, koj tsis tuaj yeem maj hloov nws, koj yuav tsum xub xyuas seb lub hwj chim yog luv luv. Txoj kev: siv lub multimeter tiv thaiv thaiv kev ntsuas hluav taws xob fuse tom qab AC davhlau ya nyob twg (kuaj taw tes ib qho), nws qhov kev tiv thaiv ib txwm yuav tsum yog kaum ntawm kilo-ohms saum toj no, xws li tsis kam yog xoom, tom qab ntawd cov khoom siv hluav taws xob muaj nyob hauv AC luv-circuit tshwm sim. Tsis tas li ntawd, peb yuav tsum tau tsom mus rau kev kuaj xyuas lub hwj chim AC lim capacitor puas lawm; Nyob rau tib lub sijhawm, yog tias muaj varistor, koj yuav tsum tau kuaj xyuas qhov resistor.
Yog hais tias qhov kev ntsuam xyuas saum toj no yog qhov qub, peb yuav tsum sim lub hwj chim ntawm plaub lub diodes rectifier (test point ob). Nyob rau hauv ib txwm lub xeev, lub pem hauv ntej tsis kam ntawm lub diode yog ob peb k (nrog ib tug multimeter × 1k block test), qhov rov qab tsis kam yog ze rau infinity. Yog tias qhov ntsuas tau pom tias muaj qhov txawv txav, lawv yuav tsum tau hloov. Nyob rau hauv txoj kab nqes, qhov tom ntej no yuav tsum tau ua yog kuaj lub hwj huam mov DC tsis kam ntawm qhov no (kuaj taw tes peb), nws ib txwm tsis kam kuj yog nyob rau hauv tus naj npawb ntawm k, xws li tsis kam yog xoom, nws txhais tau hais tias muaj ib tug k. DC luv luv Circuit Court. Ua rau DC luv Circuit Court ntau dua, xws li lim capacitor luv luv Circuit Court puas, fais fab mov oscillation raj puas, oscillation integrated block thiab peripheral Circuit Court ib feem ntawm kev puas tsuaj yuav ua rau luv luv Circuit Court tshwm sim. Ntawm no, nws yuav tsum tau muab sau tseg tias ua ntej hloov lub hwj huam mov oscillator, koj yuav tsum txiav txim siab lub oscillation thaiv thiab lub peripheral Circuit Court yog ib txwm, txwv tsis pub nws yuav ua rau lub hwj chim mov raj puas dua.
Tsis suav nrog cov khoom siv hluav taws xob hloov pauv tom qab cov teeb meem saum toj no, qhia tias feem ntau ntawm qhov txhaum muaj nyob rau hauv lub oscillation tswj Circuit Court, piv txwv tawm tswv yim circuit lossis load. Ntawm no, peb yuav tsum xub xyuas seb qhov oscillation integrated block fais fab mov Circuit Court yog qhov qub (kuaj taw tes plaub), nws qhov voltage ib txwm yuav tsum yog li 10V (tseem ceeb tshwj xeeb: vim qhov ntsuas hluav taws xob yuav tsum tau nqa tawm thaum lub zog, thiab lub rooj tsavxwm fais fab muaj cov khoom siv hluav taws xob siab, yog li them nyiaj tshwj xeeb rau kev nyab xeeb ntawm tus kheej, tsis txhob sim kov ib feem ntawm cov khoom siv hluav taws xob ncaj qha).
Yog tias tsis muaj qhov hluav taws xob ntawm qhov taw tes lossis qhov hluav taws xob tsawg heev, ua ntej, xyuas seb lub pob hluav taws xob puas puas lawm; thib ob, xyuas seb qhov oscillation integrated block thiab nws cov khoom siv hluav taws xob sab nraud yog qhov qub. Yog hais tias lub peripheral circuit tsis pom muaj txhaum, nws raug nquahu kom hloov lub oscillation thaiv. Tau kawg, qee zaum cov khoom siv hluav taws xob tsis tuaj yeem ua qhov tso zis hluav taws xob ib txwm tuaj yeem yog vim qhov luv-circuit load kom lub zog tiv thaiv tshwm sim. Rau cov khoom siv fais fab no, peb tsuas yog yuav tsum tau tshem tawm cov kab hluav taws xob, xyuas seb qhov tso zis hluav taws xob puas zoo li qub (kuaj taw tes tsib), koj tuaj yeem txiav txim siab qhov chaw txhaum. Tom qab qhov kev daws teeb meem yav dhau los, thiab thaum kawg yuav tsum xyuas qhov kev tawm tswv yim hauv Circuit Court, feem ntau hais lus, qhov tsis ua haujlwm no feem ntau yog tsom rau hauv photocoupler thiab nws cov amplifier circuit, them nyiaj tshwj xeeb rau.
Cov ntsiab lus
Tau kawg, txoj kev saum toj no tsis daws txhua yam teeb meem ntawm cov khoom siv hluav taws xob, tab sis rau kev hloov hluav taws xob hloov hluav taws xob feem ntau yuav tshwm sim hauv ib hnub rau ib hnub, qee qhov teeb meem tseem siv tau. Kuv vam tias los ntawm qhov kev taw qhia no, tuaj yeem ua lub luag haujlwm ntawm lub cib kom nyiam jade, los daws cov teeb meem me me uas tau ntsib hauv kev hloov hluav taws xob los pab.
