RE: dc-ac inverter

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

Original poster: "Randy & Lori" <rburney6-at-comcast-dot-net> 

If you are designing your own, I might have the "power" side covered.  I 
don't have a clue what kind of Sine wave you'll get from them, I haven't 
researched them at all.  These were pulled from a VERY large 3 phase UPS at 
the local recycling place.  I had no Idea what I would do with them, but I 
just couldn't leave them there.

http://home-dot-comcast-dot-net/~rburney6/jackpot/terry.htm

Randy

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, April 03, 2004 4:20 PM
To: tesla-at-pupman-dot-com
Subject: dc-ac inverter

Original poster: "Virtualgod" <mike.marcum-at-zoomtown-dot-com>

Anyone got any links to schematics that convert some dc voltage (prob120+)
to 60-400hz ac 480V hopefully reasonably close to an actual sine wave? I
was thinking of getting 4 120v 5kw ones and series them together. Then i
realized if only it were that simple (internal switching frequencies of
each will probably not be exact, and cause all sorts of problems). All I
find on a google search that comes close to what I'm looking for (I think)
is this
<http://www.electronics.50g-dot-com/cdcac.htm>http://www.electronics.50g-dot-com/cdcac.htm 

, but only rated at 110 watts. Any ideas on modding this for 480v ~210A?
I'm thinking I'll need at least double that kVA rating in the core since dc
is in it to purposely saturate it till the transistors switch. Finding
single transistors that can handle that kind of power is another story, so
might use mutliple smaller ones in parallel. I know, why don't I just get a
100kW generator? Well, sticking that in the basement (or even outside,
because of some stupid ordinance) is out of the question.