Re: [pvusers] The Exceltech Pure Sine waveform is really good

["Scott Willing" <willing@mb.sympatico.ca>]

On 19 Jul 2002 at 22:00, John D'Angelo wrote:

> on 7/19/02 19:13, Scott Willing at willing@mb.sympatico.ca wrote:
> 
> >> Another thing I love about the Exceltech is the 1 K modules
> >> weight about 7 pounds!
> > 
> > Obviously no 60Hz magnetics.
> 
> Nope no TRANSFORMERS !

Not to be pedantic about this, but there's bound to be a transformer in 
there.

I suspect the topology uses a full-voltage H-bridge for the output stage. 
The transformer will be ahead of that in the DC-DC up-converter. It'll be 
a relatively little guy, operating at a frequency not even bats can hear, 
but it's there.

-=s

> > 
> > As for your other comment vis-a-vis quality / price, yes, true, I
> > was speaking in relative terms. I believe (but don't know) that
> > Etech is more expensive/watt than Trace or Statpower machines,
> > neither of which are exactly Wallmart-grade hardware either. :-)
> 
> True!
> John 
> 



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