Dual rotor axial flux motor design

[major]

Thank you for this useful information for me!!!

Do you know the topology of the EVO motors? 2 stators? 2 rotors?

From the document where I found the section view, it says it is symmetrical axially which to me indicates an identical stator half on either side of the rotor. _2 stators/1 rotor_ I guess is one way to look at it :wink:

 

[dotrick]

From the document where I found the section view, it says it is symmetrical axially which to me indicates an identical stator half on either side of the rotor. _2 stators/1 rotor_ I guess is one way to look at it :wink:

Ok, I like this configuration. It seems easy to cool.
But...

So, how are you intending to construct the cores for this topology?

... for the core, it seems difficult... I think about a laminated core

What is the best core for :
- the best performance?
- the easiest manufacturing?
I'm pretty sure it's not the same material... :?

 

[Miles]

Most contiguous axial flux cores are spiral wound. Not something that's feasible for a one-off motor! I explored other possibilities in this thread: http://www.endless-sphere.com/forums/viewtopic.php?f=30&t=15752

 

[h0tr0d]

Regarding the EVO motor: http://endless-sphere.com/forums/viewtopic.php?f=30&t=51702

https://spiral.imperial.ac.uk/bitstream/10044/1/7103/1/Transient%20thermal%20modelling%20of%20an%20Axial%20Flux%20Permanent%20Magnet%20_AFPM_%20machine%20with%20model%20parameter%20optimisation%20using%20a%20Monte%20Carlo%20method%20for%20repository.pdf

https://spiral.imperial.ac.uk:8443/bitstream/10044/1/6129/1/Transient%20modeling%20of%20a%20AFPM%20machine%20using%20a%20hybrid%20thermal%20model.pdf

 

[dotrick]

@h0tr0d : Useful links! thank you.

Most contiguous axial flux cores are spiral wound. Not something that's feasible for a one-off motor! I explored other possibilities in this thread: http://www.endless-sphere.com/forums/viewtopic.php?f=30&t=15752

OK, interesting... I'm not alone to ask me some questions about the manufacturing of an axial stator... I have a CNC maybe i will need it to do my stator!

For your axial motor, you use a 24 Slots / 16 poles, OD 100mm, Kv <150 rpm/V, Nominal speed 4000rpm.

What is the power continous and peak, Torque continuous and peak you expect?

 

[dotrick]

@Miles

I think i found the difficulty in the manufacturing of axial motor... The F... STATOR!!!

You have to cut many patterns... ...What is the estimated price of your stator?

 

[fechter]

What if the stator was made with ferrite or Metglass cores? Each core could be separate, then the challenge is how to attach them to a frame. I've seen some relatively cheap Metglass U shaped cores on eBay. These could work in the right arrangement.

 

[Miles]

What if the stator was made with ferrite or Metglass cores?............

I found this example:

 

[Miles]

2605SA1 is the only Metglas alloy for which motors are mentioned as an application: http://www.metglas.com/products/magnetic_materials/2605sa1.asp