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Originally Posted by mfox
Hello ,
I'm able to get 4 IGBT-s FF300R12KE3 cheap from scrap yard taken from some industrial device.
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From the spec sheet here
https://www.infineon.com/dgdl/Infine...3dd4fda49101e0
Page 4, lower right graph, it looks like thermal losses for this IGBT are 25 - 40 mJ per pulse. There are some losses at the diode as well, but they should be much less.
4 of these at 300 amps each would be 100 - 160 mJ per pulse
This is an IGBT forward and a reverse diode. So it's OK for a DC controller, as you know.
Quote:
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Those are rated as 300A and 1200V . Those will produce too much heat at 1000A peak (or 1200) compared with 3x of CM600DY-12NF ???
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From the spec sheet here
http://www.pwrx.com/pwrx/docs/cm600dy_12nf.pdf
Page 4, upper right graph, I read the losses as around 175 mJ per pulse at 300A
So 3 of these at 300A each would be 525 mJ per pulse. The first ones seem better to me, if you are driving them at the same frequency.
But this is a bit deeper into spec sheets than I am normally looking. Perhaps I am not reading something correctly? There should also be a correction graph for temperature in there somewhere, along with some changes based on the voltage used to drive the IGBT and the .. current used to drive the IGBT on and off? I think that's where the capacitance graph comes in, but I'm a bit fuzzy on that part