Re: prony brake

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

I'm not sure what a prony brake is, but would this
work?

http://www.magnadrive.com/

I've been wanting to buy one at work for a while. It's
a device that replaces a motor coupler and VFD at the
same time. They use big high powered rare earth
magnets in combination with a big copper disk to
create eddy currents. What more could a mad scientist
want?

Adam

--- 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/
>
>
>
>