Re: igbt

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

Original poster: Sean Taylor <sstaylor-at-uiuc.edu> 


>I would like to know if I can use the same drive for the gates.
Yes, typically.  Compare the gate charge/capacitance of the FETs to the 
IGBTs.  If the IGBTs are higher, then you will need more current to get the 
same rise/fall time.

>Do I still need the 15v back to back zeners
Some IGBTs that I've seen include zeners on the GE junction - check the 
spec sheets and see.  If they aren't included in the package, it would be 
safer to have them.

>and do I still include the fast freewheling diodes across the collector 
>emitter legs.
A lot of IGBTs have faster diodes so it isn't necesary.  Again, check the 
spec sheet for the IGBT, and compare the reverse recovery time (Trr) with 
the diodes that you're using.

>Thanks
>Claude.

Sean