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Old 07-12-2010, 10:43 PM   #3545 (permalink)
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I think that would be fine. I'm just wondering why they had such large gate resistance. I feel a tiny bit worried. Does a very slow turn on make it more likely that all of them share the current better? igbts can have thermal runaway in parallel. The hottest one draws more current, whereas mosfets get hot and then draw less current. And 20 of them in parallel. Why would Logisystems have 200 Ohm resistors? If all they had to do was stick in some 30 Ohm ones, and it would suddenly be a better controller, wouldn't they do that? Was their gate drive such that they couldn't do that?

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