Re: In wheel motor any inherent problems with this design?


"Robert Miller" <stargazzr@xxxxxxxxxxxxxx> wrote in message
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<jimp@xxxxxxxxxxxxxxxxxxxx> wrote in message
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Robert Miller <stargazzr@xxxxxxxxxxxxxx> wrote:
The basic idea is the same as a standard stepper motor using

http://www.gaussboys.com/ndfeb-magnets/D3712E.html
This is a very popular magnet that is almost impossible to separate
without the use of a table edge or some sort of sliding mechanism.
Black epoxy coated. This one holds up to 110 lbs.

I'm thinking of using 8 of these magnets near the edge of the wheel
and use 8 pairs of coils to drive the wheel. As I see it the advantage
would be that when power is not applied for example going down hill
or coasting the wheel would also work as a generator.

How do I calculate no of magnets needed, coils needed, and current
needed for a given amount of torque? or horse power?

Thanks in advance!
Robert

Get a good book on motors and generators and read it; the answer is
non-trivial and there are a lot more factors involved.

You've got that right! Anything that involves that level of math
certianly
is not trivial :-) Does anybody have a good book they could recomend?
I've looked and have found only a few good ones and they are either
too heavy on the math or too simple. I know Calculas would be a good
subject to have mastered, unfortunately...
--
Jim Pennino

Remove .spam.sux to reply.

Robert Miller



then google it....
http://www.google.com/search?hl=en&q=electric+vehicle+wheel+motor+design
only gives about 2M hits.... a few off the first page:
http://www.tm4.com/eng/tm4transport/moto_wheelmotor/
http://en.wikipedia.org/wiki/Battery_electric_vehicle
http://en.wikipedia.org/wiki/User:A-Hrafn/Wheel_motor
http://www.csiro.au/resources/pf11g.html
http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=IEPAER000145000005000402000001&idtype=cvips&gifs=yes



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