[ausev] [Aceaa] interesting GE DC motor on Ebay

[m. howse]

I wouldn't use wire or cable with 1000 amps it would be called a buss,  
besides that statement was
a rhetorical statement only. Some people just have to nitpick by taking  
some statements too literally,
which is part of the rest of the statemnet about advice. I've wired 1000  
HP motors at 480 volts
and I know what kind of wire they use and as far as controllers go yes you  
are right but I didn't
say I was going to run a 24 volt motor at 1000 amps though apparently it  
must have seemed that way
I only iterated that the power is the same no matter what as far as the  
motor is concerned.
Although I guarantee the controllers really don't care about current that  
much it is the power
that destroys them not the current.

marv




On Fri, 19 Sep 2008 23:05:09 -0500, Brian Lasseter  
<blasseter.cmpe01 at gtalumni.org> wrote:

> On Fri, Sep 19, 2008 at 4:33 PM, m. howse <bytedawg at bytetamer.com> wrote:
>> 24kw is 24kw whether it is with a 24 volt motor or a 240 volt motor.
>
> While that is true... that "24kw is 24kw whether it is with a 24 volt
> motor or a 240 volt motor"... there are quite a number of practicality
> issues that come into play with running 1000 Amps at 24 volts versus
> running 100 Amps at 240 volts.
>
> For one... Running 1000 Amps continuously would require at least 0000
> gauge wire.   (The National Electrical Code says 0000 gauge wire is
> only rated for 260 Amps continuous... but you won't be running the car
> for that long.)  Running 100A at 240 Volts would only require 2 gauge
> wire.  2 gauge wire is about half the diameter of the 0000 gauge
> wire... and much easier to work with.
>
> Also... motor controllers are rated by amp limits... a 100A controller
> will be cheaper than a 1000A controller irregardless of the voltage
> difference.
>
> In the end... you save money (in wire and lugs), wiring time, and
> weight of copper in your car by running 100A at 240V for that
> hypothetical 24kw motor.
>
>



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