Re: [TCML] IGBT CM600 max current ?

["Chris Swinson" <list@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Derek,

I did look for some other IGBT's, but seems really expensive and nothing 
much turned up on ebay either.

I am only running about 120 pulses per second, so they are not up to much 
"abuse" in that respect. The pules is only the cap discharge, so a few 
microseconds or there abouts..

The CM600 is good as it is large and has bolt on connections, though like 
you say, its a old device but should be ok I think.. will *maybe* not even 
need any heatsinks on them for short runs.. I've not used them before so not 
really sure..

If there is any devices anyone can suggest which are at least 800V and can 
switch a few Kamps without breaking the bank......

Chris



----- Original Message ----- 
From: "Derek" <tesla@xxxxxxxxxxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Tuesday, December 09, 2008 6:22 PM
Subject: Re: [TCML] IGBT CM600 max current ?


> Chris,
>    My last OLTC ran a CM300 in the 600-800A range for a number of years
> w/o any issues. So I would assume you could abuse a CM600 to 1.2KA in TC
> duty with no problems. I assume the 1.4KA on the PDF is their pulse
> rating if ,so 1.5-1.6KA is probably the area I would go for.
>
> I don't think that they are as resilient as a smaller die IGBT due to
> localised heating. I know with some smaller devices you can run to 2x
> the pulse rating with no issues.
>
> All of the above assumes a very small mark/space ratio of course..
>
>    Cheers
>       Derek
>
> Chris Swinson wrote:
> > Hi all,
> >
> > Does anyone have any results for the max current the CM600 will be
> > happy with ? some people seem to run IGBT at mugh higher than rated
> > current. Says 1.4KA on the PDF. Wondering if anyone has any lucking
> > running them at a higher current before I blow big bucks on blowing
> > them up!  also going to try running 2 in parallel for more current..
> > tricky but hopefully it will take the current stress off a single IGBT
> > a little...
> >
> > Chris
> >
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