Peb piv txwv ntawm Switching Power Supply Faults ntawm Inverter
Ib qho piv txwv:
Lub 2844 nti yog powered ntawm nyias, tsis muaj mem tes ntawm tus pin 6, thiab cov voltages ntawm pins 1, 2, thiab 3 yog txhua yam. Qhov voltage ntawm tus pin 4 yog 1.8V, thiab tsis muaj sawtooth yoj mem tes ntawm tus pin 4 ntsuas los ntawm oscilloscope; tus kws kho qub qub tau hloov plaub lub chips ua ke. Ntsuas qhov kev tiv thaiv ntawm 4 ko taw rau hauv av, nws pom tseeb tias me me, thiab lwm cov circuits yog ntau tshaj kaum txhiab ohms. Lub tshuab yog li 3 txhiab ohms. Tshem tawm cov nti thiab cov khoom nruab nrab ntawm cov nti, ua rau 4 tus pins ntab, thiab ntsuas cov nqi tiv thaiv rau hauv av li 9 kohms, uas tsis yog qhov kawg. Obviously, tus 4-pin ntawm lub qhov los yog cov ntawv ci tooj liab muaj qhov xau taw tes rau 5-pin av point. Lub sijhawm no, sim siv 30V DC qhov hluav taws xob ntawm 4 tus pins thiab hauv av, thiab cov nqi tam sim no yog kaum ntawm milliamperes thiab tau txais me me thiab me. Thaum lub hwj chim tawm thaum nws me me li ob peb milliamperes, ces ntsuas qhov tsis kam ntawm 4 pins rau hauv av, thiab nws dhau los ua 60 kohms. saum toj no. Rov qab cov nti thiab 4-pin cov khoom, thiab tshem tawm qhov ua txhaum ntawm lub hwj chim.
Ob qho piv txwv:
Yooj yim rau vibrate. Tom qab cov nti thiab lub ntsiab hluav taws xob tau siv los ua ke, qhov ntsuas cov zis ntawm ntxiv rau 15V tom qab fais fab mov yog 11V, thiab cov zis ntawm 24V yog 19V, ob qho tib si qis. Lub oscilloscope ntsuas lub luag haujlwm lub voj voog ntawm 6-pin pulse, uas yog me me. Kev txheeb xyuas qhov laj thawj, qhov tso zis hluav taws xob pulse lub voj voog me me, uas cuam tshuam nrog lub xeev ntawm tus pin 1 thiab tus pin 3. Pins 1 thiab 2 txuas nrog pins 3 thiab 4 ntawm cov lus teb optocoupler, thiab tsis muaj teeb meem hauv kev kuaj xyuas qhov voltage. regulator Circuit Court. Muaj 18V Zener diode txuas ntawm tus pin 3 thiab tus pin 7. Tom qab tshem tawm, qhov txhaum raug tshem tawm.
Yog tias qhov tso zis hluav taws xob tsawg, yog tias nws tsis txaus rau tus kheej lub hwj chim, nws yog qhov ua rau kev tswj hluav taws xob tsis zoo lossis overcurrent. Qhov piv txwv no yog tom kawg.
Peb piv txwv:
Hloov lub hwj chim mov, nti hwj chim-on thiab lub ntsiab hluav taws xob hauv hluav taws xob, ua hauj lwm ib txwm, thiab ua hauj lwm ib txwm tom qab tshem tawm cov nti fais fab mov. Txheeb xyuas tias tsis muaj kev thauj khoom luv luv, thiab lub raj hloov pauv tsis muaj qhov kub thiab txias. Qhov ua rau tsis txaus ntawm tus kheej lub zog yuav raug txiav tawm. Ntawd yog, lub peev xwm ntawm kev ua kom muaj zog tsis txaus, thiab tsis muaj kev hloov pauv tom qab txo qhov pib ua haujlwm. Tseem 5, 7 tus pin fais fab mov lossis teeb meem excitation. Obviously, nws muaj nyob rau hauv Circuit Court ntawm pins 5 thiab 7 ntawm lub nti.
Tom qab hloov lub nti nws ua haujlwm zoo.
