[ausev] Trike conversion: Remedial EM Sheilding question.

[Erik Bigelow]

Hi Dan,

There are two usual solutions to EM noise. The first is to bundle the
cables together whereever possible and make any loops needs have as
small an area as possible. Twisting the cables maybe even better if
possible. The second is to create a shield of some sort -ie running
the cables in metal conduit or putting a metal braid over the cables.

After that I see two options - strike a balance between doing the best
you can with shielding and cost/time and calling that good, or find
some way to quantify the results. I think there are E field meters
available, but I don't know anything about price or accuracy. That way
you can see what the resulting field is from your setup and if it even
needs any EM field solution. The problem with that is you then need to
decide what is "safe," and I've never seen conclusive evidence of
fields encountered outside of an MRI that have an effect on people.

Erik

On 11/10/06, jtp <jtp at onr.com> wrote:
> I've been looking on the net for a site that can help me answer one simple
> question:
>  Is there remedial EM sheilding that can be effective if you are sitting ten
> inches away from an 8 inch diameter  DC electric motor at 96 to 120 volts,
> probably fluxing at 15 thousand watts?    Yes or no?
> (Preferring not to be the conduit for that EM feild in alignment with the
> motor one way or another.)
> Dan Petit.
>
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