On 9/24/07, Sean Breheny <shb7@cornell.edu> wrote:
>
> However, I'd still like to know if anyone knows what to call the
> electromechanical device I described (a transformer constructed like
> an AC motor with no permanent magnets. The primary is like the field
> winding and the secondary is the armature, rectified by the brushes).
> It seems that there should be a way to construct it so that the
> electrical power comes from the field winding source, not the
> mechanical input (like a generator).
>

This one?
http://www.nycsubway.org/tech/power/rotary.html
http://en.wikipedia.org/wiki/Rotary_converter
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