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From: email@example.com (N. Thornton)
Subject: Re: AC/DC Inverter
Date: 16 Nov 2002 18:02:52 -0800
NNTP-Posting-Date: 17 Nov 2002 02:02:52 GMT
firstname.lastname@example.org (chris) wrote in message news:<email@example.com>...
> firstname.lastname@example.org (Shane) wrote in message news:...
> > Hello, I'm a student taking electrical engineering here in canada. I'm
> > working on a Ac/dc inverter system and looking for information or a
> > schematic for the inverting stage of my ups system. I'm having a 12
> > VDC input and looking for a good way to invert it to a clean 60hz sine
> > wave. I've found a schematic using a multivibrater circuit but thats a
> > square wave design and I quess I could filter out some harmonics but
> > the loss in power would hurt. Anyone who could help I would much
> > appreciate it. Thanks
> Hi, this is dead easy these days, look around for motor inverter parts.
Exactly. To say it cant be done in 8 months is way off. You could get
2 motors working correctly together inside a week.
Mechanical motor generators are at best 60% efficient, they can be
worse, and they arent silent.
Their lousy efficiency makes them not worthwhile for solar electric
projects. The real q is what exactly are your requirements. And why
dont you just buy one ready made? And why must you have sine wave?
Modified square is much easier.
I for one couldnt suggest what road to follow withou knowing much more
about your app. But if you mnust have sine, _your_ only 2 real options
are to buy one ready made or to make a motorised unit. Funny how we
can overlook the obvious sometimes.
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