Magnetic strength of Neu motor

I'm pretty sure I read somewhere that this was an intentional design change. I think it may help the motor's ability to coast in neutral as opposed to effectively brake in neutral. Not sure however so I'd suggest you check with Tekno.

[rabosi]

Originally Posted by MacII

I'm pretty sure I read somewhere that this was an intentional design change. I think it may help the motor's ability to coast in neutral as opposed to effectively brake in neutral. Not sure however so I'd suggest you check with Tekno.

Cogging may be the wrong term to use here. The above quote is probably the issue.

[nl12]

I hope this is a genuine improvement, not a compromise to help people run lower quality controlers.

[lutach]

Maybe they just went to a different diameter rotor to give it a little more airgap.

[phatmonk]

I have the original Neu 1515/1.5d and the Tekno Neu 1515/1.5d and the original does seem to run cooler.

i can turn mine by hand as well, and the other day on the track it got up to 175*,which is far hotter then most of the others running original neus, but i think that after 20 min. of running that is acceptable, so what ever the changes are from the original ones it is still worth the praises, great motors imo, but i have never ran a original version

Guys,Thank you all.
I got reply from Tekno RC. They told me this is the new design to reduce cogging.
The performance will be the same.The rotor/stator design is a little different to reduce cogging. All of the newest Neu motors are like this.
Anyone notices the improvement of cogging in these new design motors?

[phatmonk]

Originally Posted by Gallagher

Guys,Thank you all.
I got reply from Tekno RC. They told me this is the new design to reduce cogging.
The performance will be the same.The rotor/stator design is a little different to reduce cogging. All of the newest Neu motors are like this.
Anyone notices the improvement of cogging in these new design motors?

Now that you mention that yes its very smooth.But it does seem to run hotter temp wise.

[rabosi]

My neu motor (not teckno) also runs hotter than i expected. I wonder if the cogging was that bad in the older design to justify the hotter running of the new design. Anyone have experience with both types?

I was told from Tekno that the hotter temperature could be the consquence of enclosed front and rear end or the gearing problem. There should not be any difference of performance in both designs.
Nevertheless, I think maybe desing is one thing; reality is another.
If this is really trend of new Neu motor, I would be very curious about how the new rotor and stator design look like?

[What's_nitro?]

I'll give you semi-slotless. Slotless motors have no laminations in the stator.

[johnrobholmes]

My vote would be that the stator is skewed as well. Magnetic detents (cogging as you are calling it) are determined by the magnetic pole/ stator count ratio as well as the magnet strength and motor design. I doubt that Neu went slotless, so the most likely choice is that they skewed the stator laminations. It shouldn't actually effect the efficiency, but it will make the motor roll easier and put less vibration through the vehicle.

Can you quantify that? 10 degrees? Over how long?

[zeropointbug]

Yes, do tell. This is very valuable information. I can't believe they would sacrifice efficiency... if it is the case that they run hotter, i wish they would have left it alone, or at the very least, IMPROVE efficiency.

I find this odd though, theoretically, a slotless motor should be more efficient, and more power dense, but from what products are available, this is not the case. I wonder what would come if Neu made a good slotless design, targeted around efficiency (I've seen slotless designs hit 98+%), but obviously, power density would be reduced, but then again, we don't even use these motors to their full potential, so it might just end up being a winner. Most ppl only push their motor to roughly 60% peak power.

[phatmonk]

I never had problems with my original Neu 1515/1.5d cogging.