Re: "modified" sine wave inverters ?



Winfield Hill wrote:
> DGoncz@xxxxxxx wrote...
> >
> > Don Lancaster wrote:
> >>
> >> http://www.tinaja.com/magsn01.asp
> >
> > WTF? Sure, incredibly precise sequences of carefully chosen bits can
> > emulate a sinewave Class D, but if even one solder joint isn't right,
> > the whole thing won't work.
> >
> > I'm talking about a *reliable* generator that won't fail when it takes
> > a bullet.
>
> Solder joints? Reliability? Doug, Doug. We're talking about some
> lookup tables in a microprocessor, not solder joints. Once those
> are designed and typed in, they never change. No solder joints, or
> unreliable connections would affect a magic sinewave, or other PWM
> technique, preferentially over more simple approaches, once they're
> embedded inside the microprocessor code. Bullets? Bring them on.

No way. uP code depends on the existence of a uP, and it's hard to
harden such. If you pry a bullet out of a motor/generator, there's a
reasonable chance you can improvise a repair. If you pry a bullet of a
uP case, there's almost no chance of getting it to run again using a
Swiss Army knife, tape, and a bit of wire.

Sure, you can harden computers. Motor/generators are inherently hard to
begin with. It's a power source, fer heck's sake! It's got to be the
*last* thing to fail. Everything depends on the source. Live are at
stake.

Doug

.

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