Re: OLTC - IGBT bricks

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Steve,

They will be here tomorrow and I will get your two out ASAP!

I looked over the spec sheet and they look great!!  I do notice that Cies 
is a stunning 120nF!!!  They are going to need some serious gate drive to 
get them to 20V fast!!  I guess we need like Darlington pair IGBT inputs 
now :o)) But should not be a big deal really.  Apparently, they "can" be 
turned on in less than 0.5uS which is 20 times faster than we need...

I hope they work.  Since the gates are controlled with Kelvin connections 
and they are single die (I think), they should be able to work.  Powerex 
seems to have no problem "specing" them to 1200A pulse current!  Maybe "we" 
can get them to go to 5,000 amps ;-))  Thanks for finding these.  I note 
Powerex has some 4500V 1000 amp devices too while is almost in the MOT coil 
range.  Our IGBTs go for about $300 and the big ones for about $700 
new.  But they seem to go for a song on Ebay ;-))

Cheers,

         Terry


At 09:48 PM 4/15/2003 +0100, you wrote:

>>Date: Tue, 15 Apr 2003 21:17:41 +0100
>>To: "Tesla list" <tesla-at-pupman-dot-com>
>>From: Stephen Conner <steve-at-scopeboy-dot-com>
>>Subject: OLTC - IGBT bricks
>>
>>
>>http://www.pwrx-dot-com/pwrx/docs/cm600ha24h.pdf
>>
>>This means that they should be usable (or even excellent) in an OLTC. 
>>There are a whole bunch of these (used) dirt cheap on EBay just now. Like 
>>50 bucks for 4, or 300 bucks for 28 (!) I'd buy some, but the seller 
>>won't ship to the UK.
>
>Does anyone feel like buying the 4 bricks and reselling a couple to me? 
>Terry Fritz ought to have one of these too so he can test it to 
>destruction. I don't mind if you make a couple of bucks on the deal. The 
>auction ends in 2 days.
>
>http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&item=2522969182&category=36332
>
>Steve C.
>