Thanks for the reply, I guess I cant link pictures on this.. but I was
able to access the website, perhaps that will work
http://physics.kenyon.edu/EarlyApparatus/Electricity/Unipolar_Generat...
However, my interest is not in making a motor or generator, but an
eddy current dampening system, similar to the setup pictured on the
above site: basically, have an electromagnet coil on either side of
the plate. It was my (limited) understanding that this would require
either a stationary conductor and a moving B field or in this case,
have the 2 coils generate a constant B field perpendicular to the face
of the plate spinning between them, like this:
N-coil-S ====>B (plate) B====> N-coil-S
or better yet, if they were connected, like in a C-shaped electro-
magnet:
N-coil-S ====>B (plate) B====> N-coil-S
| |
|-----------------------------------------------------------|
With the velocity vector of the plate moving into or out of the
screen. Will this dampen the motion? The only vectors I need to
determine this, as far as I can tell is the current density (J?) and
the resulting Force the eddy currents will have, if any.
On Aug 21, 10:14 pm, "Don Kelly" <d...@shaw.ca> wrote:
The site seems to be closed to the general public. From the title it refers
to a homopolar machine- once used as a low voltage, high current DC
generator but as the only difference between a generator and a motor is the
direction of energy flow, it could be used as a motor (generally not
practical).
Consider this: What is the difference between a magnetic field produced by
a permanent magnet and an electromagnet of the same geometry? B fields
don't have labels. It is possible to work out the forces involved as well as
generated voltages using either Coulomb's law (applied twice) or even with
Faraday's Law along with Coulombs law (although some dispute the latter).
--
Don Kelly
d...@shawcross.ca
remove the X to answer
----------------------------<MattCha...@gmail.com> wrote in message
news:1187711892.290546.277720@e9g2000prf.googlegroups.com...
Similar to this design.. or is this a generator?
img src="http://physics.kenyon.edu/EarlyApparatus/Electricity/
Unipolar_Generator/kenyon12a.JPG"
