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Old 10-31-2010, 11:51 AM   #3944 (permalink)
jackbauer
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The problem with such large slightly dated modules is not their ability to handle power but their ability to switch fast. Comparing the hitachi module to the fuji 1mbi800U4B-120 that i'm using in the car right now:
Fuji:
ton typ = 0.32us
toff typ = 0.41us

Hitachi :
ton typ = 0.8us
toff typ = 1.4us

So from the above switching losses would be quite high.The hitachi also has a higher gate capacitance at 112nf vs 90nf for the fuji. this would require more gate drive.

I'm not saying it won't work just that its not all about the Vce and Ic when it comes to igbts.
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
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