Re: I need great info on IGBT's...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jan Wagner by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jwagner-at-cc.hut.fi>


> do these IGBT's need a full sine wave to turn off ( like SCR's ) or can
> they work on pre-filtered full wave bridge rectification wave???

IGBTs work pretty much like a standard bipolar junction transistor, at
least output charasteristics wise. This of course applies to IGBT modules
too, not only to single/discrete IGBTs.

IGBTs can be switched off any time you want. For example,
 http://www.ies.nl/images/Itecinfo-08.gif
and
 http://www.ies.nl/Info%20IGBT.htm

DC works very well.

AC will work just fine too but only for the positive "part" of the cycle,
in the negative cycle the freewheeling diodes of your IGBT module would
conduct => short circuit accross mains if you don't take additional
precautions.

Switching inductive loads, t.ex. in motor control, is something IGBTs will
love to do. So that won't be a problem either. :-)

Rated for 200A, your module will probably be able to take 400A at 25
degrees celsius. Not to mention peak non-repetetive currents of maybe 1kA
or so. That's pretty cool... :-)

Have fun!!

cheers,

 - Jan

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