Re: IGBTs and CW Tesla Coils

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

Original poster: "Darren Freeman by way of Terry Fritz <twftesla-at-qwest-dot-net>" <free0076-at-flinders.edu.au>


Marry,

At 03:15 AM 20/08/2002, you wrote:
>Original poster: "Marry Krutsch by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>
>
>Hi All,
>
>         Terry's work with IGBTs has made me wonder if they could be used in
>continuous wave SSTCs.  Since you SSTC guys are just using MOSFETs as

I'm working on an SSTC using IGBTs and I expect it to work first time. 
Whether it will is another question =)

>switches anyway, couldn't IGBTs be used instead?  I don't know how high

The circuit will be a little different but yes.

>IGBTs can be pushed frequency-wise.  Also are IGBTs PNP or NPN?

They aren't much good for high frequency, so you had better be thinking of 
a huge coil =)

Some may go to 200 kHz when soft-switching, but in that case you'd better 
be pretty close to resonance. Most don't like 100 kHz too much.

In fact if you aren't driving a resonant load, instead driving a motor 
etc., you will need to keep under 20 kHz for decent efficiency..

So like I said, you'd better be driving a huge coil =) The one I'm going to 
drive is just under 100 kHz...

>         These things sound pretty cool.  I might have to buy some :-)).

Not too cheap though =)

>Thanks,
>Winston K.


Have fun,
Darren Freeman