Re: tachogenerator

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@...> wrote:

>
> bondeoca wrote:
> > Hello All
> > I have picked up a G E tachogenerator hoping to use it as a

spindle

> > drive motor for my mill.
> > It is a pm rated at 100 volts per 1000 rpm.It is apprx . 7 inches

in

> > dia. and 10 inches long,has
> > four brushes 180 degree spacing. When I apply 100 volts it
> > rotates ,but with a 2 inch pulley
> > on the shaft I can stop it by hand a turn it in the opposite

direction.

> > So my question is , is there something I can easily do to this

motor

> > to increase its torque?
> > I also notice the magnets for being quite large , do not seem

very

> > strong.
> >
> It is NOT a motor! It is a measuring instrument, designed to

accurately

> measure the speed of some mechanism.
> Since all electrical machines are reversible, it is similar to a

motor,

> but it is optimized all wrong for use AS a motor.
> Other than replacing the magnets and windings, I think it will be
> impossible to make it function well as a motor.
>
> Jon
>

Thanks Jon, I knew it wasn't a motor ,but a lot of sites say any
dc motor can be run as a generator and visa versa. Do you know how
the windings differ from a dc motor?

Rick