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Banned on 3/17/2009. Registered Member #487
Joined: Sun Jul 09 2006, 01:22AM
Location:
Posts: 617
Slap them in a coil and see how they hold up.
About a year ago i had bought a lot of about 100 or so IGBT's on Ebay. I couldn't find any information on them what so ever and come to find out they were custom made by IXYS for someone and would not disclose any info about them.
I threw them in a coil and they worked. The coil was a POS, too low coupling and too few primary turns, eventually they failed, but they did work. I am going to give them another try soon. That's about all you can do with yours I suppose.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Kizmo, how did you conclude they are IGBT's?
Do you have transformers, chokes and rest of the inverter there? More information on the inverter?
Surely that would be usellesly many IGBT's for power level, especially considering that there is no significant efficiency gain from paralleling IGBT's I wouldn't expect to see more than four.
Looking at those fat leads makes me think that most are on low voltage side, so my best guess is that most if not all of those transistors are low voltage mosfets paralleled for massive current throughput.
Registered Member #90
Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301
Kizmo wrote ... Few days ago i took apart pretty modern 8kVA power inverter from some sort of backup power supply and found this:
I don't know what they're good for -- I just love how you show the PCB on a table saw ready for a little precision surgery! Ah yes ... you wouldn't believe the number of times I wished I could have actually done that ...
Cheers, Barry In theory, theory and practice are the same. In practice, they're not.
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Got unknown IGBT's, any ideas?
