[sdiy] Filtering noise from power inverter in the van studio...

[Dave Magnuson]

If you were to use a generator running off the van's engine, then there are 
a few things to consider.     Generators typically like to spin fairly 
fast... 3000-4000 rpm.    You obviously wouldn't want the van idling at 4000 
RPM, so you'll need to be careful about pulley diameters to get the proper 
speed at the generator.    You could also look for a generator designed to 
run on a tractor PTO.   These have a gear drive that needs about 500-1000 
RPM at the input.

In either case, I believe you'd want the generator turned off while driving 
the van.   This means you'd need something like an air conditioner clutch to 
stop the generator from spinning when it's not being used.   Or you could 
get a transfer case from a junk yard and have a real PTO system installed 
(which requires changing the transmission tail piece and shortening the 
driveshaft).   The PTO option is probably the "best" method, but requires a 
lot more effort.

Dave

----- Original Message ----- 
From: "R. D. Davis" <rdd at rddavis.org>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, July 11, 2006 10:08 PM
Subject: Re: [sdiy] Filtering noise from power inverter in the van studio...


> Why not just modify the engine compartment to drive an AC generator
> directly from the engine?  You may need to have a custom bracket or
> two made, get some larger belts, maybe an additional pulley, etc., but
> surely some machine shop could make the parts for you once you find an
> appropriate generator to use.
>
> As to the generator itself: You could probably find a small enough
> generator by ordering a replacement AC generator part for some random
> emergency generator manufacturer (e.g., the kind of unit one purchases
> from a hardware store as an engine/generator combo).
>
> Keep us updated on your progress with this!
>
> -- 
> R. D. Davis 410-744-4900  Beware & halt the National Animal ID System 
> (NAIS)!
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