Miles wrote:If we could decide on a specification that would satisfy enough people on ES, we could design our own motor. It might be possible to have the laminations made in sufficient quantity to justify the cost of tooling for stamping.
I was only thinking of the price. I think stamping is cheaper beyond a certain quantity. In some ways, laser is better - no tooling costs, no need for post annealing, possibility to tweak the design, etc. I guess one could start with laser cutting and then move to stamping if/when the demand justified it.Jeremy Harris wrote:Are they best stamped, do you think, or would laser cutting be an option?
How about making the stator diameter 112mm?Jeremy Harris wrote: I'd like to see an out runner that's about 100 to 120 mm stator diameter, with a stator length of around 100 mm or more. A 12 slot, 14 magnet set up would be fine for me, and if we could choose dimensions that suit an off-the-shelf neo magnet so much the better.
I'm keen on 18t 16p. It has a high winding factor and (like 9t 8p) the BEMF is very close to sinusoidal.
Miles wrote:I'm keen on 18t 16p. It has a high winding factor and (like 9t 8p) the BEMF is very close to sinusoidal.
Reduced iron losses. At the speed of a hub motor, it's not that important.John in CR wrote:How is the 16p and advantage over 20?
Miles wrote:What is the range of nominal speeds we need to cover?
No, I'm still working on it. It would be too expensive/difficult for a project like this, though, and it's unproven.nieles wrote:what about your axial flux motor miles, did you abandon that project?
Miles wrote:Reduced iron losses. At the speed of a hub motor, it's not that important.John in CR wrote:How is the 16p and advantage over 20?
That was the reason for this question:Miles wrote:What is the range of nominal speeds we need to cover?
That's around 45Nm of torque. I'd guess not.John in CR wrote: Could handle a 10-12kw input in the 2000-2500rpm range?
It would be good to have something I could run at around 1200 rpm. I'd only want a 50mm stator length.BTW, did you ride someone's high powered rig and now you need one too or was I wrong in thinking you were after the lower power end of the spectrum?
Thud wrote:At 16 pole pr's we would have to use 10mm wide magnets. (but an 18t 8p fits with gaps) we can increase copper & concentraight buy stepping to 21t 14p here is a screen shot side by side....along with my 24t 16p
Take your pick.....
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