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Re: Please help ! IGBT exploded ...
Original poster: Sean Taylor <sstaylor-at-uiuc.edu>
IGBTs will tend to be a lot slower than FETs - and have a lot higher gate
capacitance. I'm guessing you had shoot through, and the immense current
blew the IGBTs. ALWAYS ALWAYS do low voltage testing before applying the
full voltage - use a variac and monitor the input current, or run from a 12
VDC source first and check all the waveforms - see if the output devices
have the right gate waveforms, and are in fact turning on and off at the
If you'd like, I'll post a schematic for a simple deat time controller so
that you can add a small amount of "off" time in between pulses while
waiting for the IGBTs to turn off.
On Mon, 08 Mar 2004 07:45:01 -0700, Tesla list <tesla-at-pupman-dot-com> wrote:
>Original poster: "Rajesh Seenivasan" <rajeshkvs-at-hotmail-dot-com> Dear forum
>Yesterday I was experimenting with an old IGBT - BSM100GB60DLC, which I
>got from my friend,
>for my SSTC. I used the same gate driver I designed for IRFP460 MOSFET H
>I connected the terminals to 220V line and neutral and switched ON my gate
>The IGBT exploded immediately ! I did not give any load to IGBT. The H
>output terminals were not connected to anything !
>The gate drive was at 70kHz approx.
>I observed that the gate drive waveform was not clean like a square wave.
>Any advise for me ?