IGBT device ( test in room lab )

Thread Starter

TheSon-Le

Joined Oct 24, 2019
12
hello anyone !

I have a trouble with unit IGBT

value of the Current down From 4.38 (A) to 0.4 (A) .

after around 1 week to set up .

honestly, i really want to know how to fix it .

the photo below shows value related to Bench set up :
1572235128884.png


1572235160580.png

thanks
 

kubeek

Joined Sep 20, 2005
5,724
Hi, could you elaborate on what are you measuring and how, and what the problem seems to be?
The pictures are tiny and the screenshot doesn´t look like anything but a bunch of random numbers, so I guess you need to tell us a lot more if you want to get any resonable responses.
 

Thread Starter

TheSon-Le

Joined Oct 24, 2019
12
hi master,

value of the current when start setup as 4,12( A)

but after 1 week run value current drop down to 0.45 (A)

i don know why


does anyone can explain for this case .

thanks
 

Thread Starter

TheSon-Le

Joined Oct 24, 2019
12
So what is your question? Also, the thread title mentions IGBT, and this is a diode, so what is going on?

sr about that , it is 2 diode .


hi master,

value of the current when start setup as 4,12( A)

but after 1 week run value current drop down to 0.45 (A)

i don know why
 

Thread Starter

TheSon-Le

Joined Oct 24, 2019
12
hi master,

he first of all,

sr when i was not provide lack of the information, tomorrow i will take a photo for you again,

for about the contact with supervisor , i had discuss with them but until now the sittuation was not ok ,
the current still drop down continue ,

supervisor asked to me : change a new mother board this device but after checked i have seen the current did not up to normal .

i promise , tomorrow i will update again for this case ,


thanks for your advice.
 

kubeek

Joined Sep 20, 2005
5,724
So all 84 diodes are in parallel? Or are they in series?

BTW, I don´t think your employer would be very happy to see internal documentation posted on the internet.
 

Thread Starter

TheSon-Le

Joined Oct 24, 2019
12
So all 84 diodes are in parallel? Or are they in series?

BTW, I don´t think your employer would be very happy to see internal documentation posted on the internet.
hi master,

i make sure 84 diodes are in series ,,

cuz i have a problem when describle for this test,

so i have decided to share a little document of my company , thanks for reminded.

thansk
 

Thread Starter

TheSon-Le

Joined Oct 24, 2019
12
I think you should ask your supervisor, or someone who knows what the device actually does. Without a LOT more detail about what the device is doing nobody can tell you anything.

hi master,

i updated new photo related to Value of the current in 2 times :

1, start :
1572608028939.png

after 1 week :

1572608065285.png

please advise for this case .

thanks
 
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