Subject: Re: Reducing contact resistance for low volt use?
Summary: What do you think of these ping times eh?
Reply-To: You can't see me, and I pass right through planets...
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org>
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Date: Mon, 06 Jan 2003 13:22:02 GMT
NNTP-Posting-Date: Mon, 06 Jan 2003 08:22:02 EST
On Mon, 06 Jan 2003 06:20:59 GMT, jmuchow@SPAMMENOTcamlight.com (John
Muchow) Gave us:
>With 20-30 cells in series powering that motor, that's a lot more than
>100A, even with wire and connection resistance.
You keep getting this ass backwards. Series batteries do NOT
produce ANY more current than does any one single cell in the pack.
In order to scale UP in current capacity, batteries have to be
placed in parallel.
That's nowhere near 100A.
> The motor can catch
>fire, the insulation (or even the wire) melt, the batteries
>practically explode, but it happens all the time as the builders of
>these extraordinary machines push the limits on every component in
Nice embellishment, but quite meaningless. Instead of operating
outside the levels of design for the batteries AND the motors, you
should select a motor that does the same job at the PROPER voltage.
Juicing up a motor over its spec is a step backward as they go DOWN
in efficiency as you go up in voltage, regardless of the observed
If you run a twelve volt motor at 24 volts you could do the same job
by finding a twelve volt motor that produces the power and rpms of the
tweaked motor. They are designed for an optimal operational range,
and stepping outside that range might yield apparent gains, but is
actually a hit. There are plenty of high torque motors that can
perform at the same (better) levels as your overtweaked motors do.
They would do it at a lower discharge rate.
You are shooting yourselves in the head, much less the foot.