high power igbt test

Thread Starter

elanium

Joined Aug 3, 2021
12
Hi! I have a semikron skiip 12nab126v20 module which has high power igbt in it and I wanted to test them with LED in circuit, but the normal circuit test isn't actually working, and I have to give it a reverse voltage to turn it off. Does anyone know how should I change the circuit?
 

LowQCab

Joined Nov 6, 2012
1,189
First off, where's the Circuit ?
This sounds like You are letting that Gate-Pin flop-around in the breeze.
You may have already damaged the Gate and ruined the part
by leaving the Gate in a "Floating" condition.
.
.
.
 

Thread Starter

elanium

Joined Aug 3, 2021
12
First off, where's the Circuit ?
This sounds like You are letting that Gate-Pin flop-around in the breeze.
You may have already damaged the Gate and ruined the part
by leaving the Gate in a "Floating" condition.
.
.
.
photo_2021-08-13_16-00-19.jpg

this is the circuit .
you know, someone told me that because this is power igbt and when you stop exciting the gate it has a very small current and because of the high power , the current is enough to turn a small LED on. and here is its characteristic
Screenshot (796).png
 

LowQCab

Joined Nov 6, 2012
1,189
That Circuit won't really prove much at all,
other than the IGBT is probably not smoked and shorted.
High-Impedance Inputs don't last long rattling around in a junk-drawer,
the Input can be "partially-damaged" by mis-handling.
.
.
.
 
Top