Re: prony brake

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Sean Taylor" <sstaylor@xxxxxxxxx>

Another idea for an induction motor . . . If you're spinning fast
enough (above synchronous speed), you can place a large capactor
across the terminals and connect various loads.  You just have to be
careful to keep the speed up or the load will drop considerably.

Sean Taylor
Urbana, IL

On 3/7/06, Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Steve Conner <steve@xxxxxxxxxxxx>
>
>
> >Use of a generator on bearings works fine and is a lot safer.
>
> I've also seen an induction motor used as a brake. You pass DC
> through the stator windings (any one you like, it doesn't seem to
> matter much) and it acts as an eddy current brake. You have to blow a
> lot of cooling air through the rotor since all the mechanical power
> is dissipated in it. It's probably not the best dyno brake in the
> world, but it might be of interest if you have an old 3 phase motor
> lying about.
>
> Steve Conner
> http://www.scopeboy.com/
>
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