Tiny Rotors

[Tritium]

Here is a start of a new toy project I am working on.

It will be a 20 Pole 15 coil 3 phase axial flux machine.

Shooting for a 12V system. Wire from old degaussing coils about 26ga or

I have a spool of 32ga if the bigger wire won't fit. I figure a gap of .15" as

the magnets are .06" thick.

I am planning to use an old spinning reel for the drive section with

blades attached instead of the crank. Thinking 18" swept area.

Hey Ben (gotwind) are you seeing this?  

Thurmond

[gotwind2]

Hi Thurmond.

I can't see how you can get 15 coils in there?.

Board member frefdx made me a 6 coil stator, dual rotor and that must have been a challenge, full story here.

http://www.fieldlines.com/story/2009/8/1/145251/4544

It's fun trying these small in size projects, but as flux always tells me, efficiency goes way down at such a scale.

The best one I made was this 2 pole design, 10 watts at a push

http://www.gotwind.org/diy/12-inch-mini-turbine.htm

Good luck.

[frepdx]

that looks like a fun project.

What are you planning to use for blades?

[Tritium]

One of the board members (richhagen) has some small blades I plan to use when I receive them.

Story with the blades is here:

http://www.fieldlines.com/story/2009/4/29/165453/336

Once again its a toy and it will be a challenge to get 15 coils in the space available.

Thurmond

[Tritium]

Nobody noticed my big mistake. Look at the left rotor in the picture. Yep, 21 instead of 20 magnets.

Since this will be very low power I am thinking of trying to "print" a stator (etched printed circuit board). It might be more fun than winding and wiring 15 tiny coils and potting them.

Thurmond

[ghurd]

Wow thats small!

What size are those magnets?

G-

[Tritium]

Magnets are .06" thick and .19" diameter N45 grade.

Thurmond