Re: IGBT switching speed / resonant switching...

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Original poster: "resonance" <resonance@xxxxxxxxxxxx>


280-300 pps is usually a reasonable max.  Above that, problems with 
reliability and failure.  200-250 is a good range to run in.  Some 
experimenters report best performance around 160-180 pps.  I think 
the higher rep rates provide more charged ions around the spark 
channel areas, assist in spark channel formation, and contribute to 
long sparks.

Dr. Resonance



> Dear forum members,
>
> Can anyone tell me how to calculate at the maximum switching speed 
> for IGBT modules? I understand that the turn on and turn off time 
> limits the switching speed. and the switching frequency will improve 
> a lot by utilizing resonant switching or zero current switching.
> Consider the following IGBT for example:
> BSM75GB120DN2 (or any 1200V, 100A IGBT bricks from Powerex or any 
> other manufacturer)
> Can they be used in a half bridge and switched at frequencies 75KHz 
> to 100KHz to generate square waves at 600V to 700V and current draw 
> between 30A to 50A (less than half of the continuous current 
> specification in datasheet) ?
>
> Thanks and regards,
> Raj.
>
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