Re: dc-ac inverter

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

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

Jim;    Thw schematic to most inverters is a derivation of the one you have
using better transistors such as the RCA 40411.  The basic inverter runs
around 1600 Hz and is free running. More expensive inverters use acurate
frequency control. I have one made in the 1970;s that uses a mechanical 60
Hz vibrator as a frequency standard. Old tube filament transformers were
commonly used. For higher power you will nead higher power components. I
once used a 4:1 pole pig switched with 400 amp 3000 volt SCR's made by IR
to power my house from my 28 volt batteries. Charged by a wind generator.
Alternate energy and Mother Earth publications have schematics. In years
past JC Whitney also sold paper back books on the subject.
             Robert   H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Sat, 03 Apr 2004 18:05:24 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: dc-ac inverter
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Sat, 3 Apr 2004 18:22:45 -0700
 >
 > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >
 > Most inverters have fairly simple internal designs, so modifying them to
 > slave to a common reference frequency probably isn't that tough. If you have
 > the tools and skills to contemplate this in the first place, then doing a
 > bit of reverse engineering won't be that tough.
 > I'd look into the inverters and such aimed at the home power market, since
 > they'll have the capacities and sine wave output.
 > You could also use a 20 kW 240V inverter and run it into a 240:480V dry
 > transformer.
 >
 > As far as a roll your own design, it really depends on how good you want the
 > waveform.
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Saturday, April 03, 2004 1:19 PM
 > 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/cdc
 > ac.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.
 >>
 >>
 >
 >