Posted by Jim Wilkins on December 21, 2009, 11:35 am
> ...I want close spacing
> between magnets and coils, would rather support
> my outer rim with more predictable spacing, such
> as skateboard wheels. Using a base of 8 ft diameter,
> I can have a lot of magnets going past a lot of coils
> every rotation. ...
> Michael,
For really close spacing the rotor diameter is limited to the size of
your metal lathe. Some of the lathe/mill combos have a substantial
diameter capacity like 17" IIRC, and might be available used at a
reasonable price since they are lousy milling machines.
jsw
Posted by Curbie on December 21, 2009, 8:45 pm
Michael,
It seems you're just looking at a pretty standard VAWT, with a wind
funnel for increased speed?
Curbie
Posted by Michael B on December 21, 2009, 10:24 pm
Yeah, nothing special, really.
Not extra speed, but extra power.
> Michael,
> It seems you're just looking at a pretty standard VAWT, with a wind
> funnel for increased speed?
> Curbie
Posted by Curbie on December 22, 2009, 5:14 am
Michael,
Well to each, his own, I'm more interested in creating useful power,
and to that end, I will take some time to study that magnetic bearing
5kw you posted.
Thanks for the idea.
Curbie
Posted by Michael B on December 22, 2009, 11:59 am
If you take a couple of 95 pound rated Neodymium
magnets on a center shaft, it will take a considerable
amount of weight to make them get close to each other.
There is a video showing that.
But the problem with magnetic repulsion on a small scale
placed on the outer rim is that it is very difficult to make sure
about the spacing, unless a center shaft keeps wobble to
a minimum.
> Michael,
> Well to each, his own, I'm more interested in creating useful power,
> and to that end, I will take some time to study that magnetic bearing
> 5kw you posted.
> Thanks for the idea.
> Curbie
> between magnets and coils, would rather support
> my outer rim with more predictable spacing, such
> as skateboard wheels. Using a base of 8 ft diameter,
> I can have a lot of magnets going past a lot of coils
> every rotation. ...
> Michael,