Do we need 6-8poles motors for 1/8 ep?
 

hi, Do these motors draw more amp?

presently Neu. Tekin & medusa are using 4 poles. I was recommended 6-8poles? Will it work? the motor will be huge & amp draw very high?:whistle:

Who makes 1/8 6-8 pole motors?

The size and kv of the motor (amount of copper windings) will determine current draw, the pole count in my mind has more to do torque. but I'll let someone smarter than me answer that one.. :/

Technically 6-8 pole motors will provide more torque. But really it depends on what motor you use.

The neu's and other 4 pole motors provide plenty of torque for 8th scale. I really don't see what the advantage of going to 6-8 poles are going to be, especially since the market and availability is rather limited.

My lhs was saying he is testing some boat motors 6-8poles about 1900kv can run 1hr non stop wo burning.

I am skeptical

Higher poles have more "available" torque. It doesn't mean all of it will get used in the application as it depends on the load that's presented to the motor. I think the advantage of higher pole motors is that you can use smaller motors that provide enough torque to move the heavier 1/8 scales around. A 1/8 buggy isn't that bad, but a 1/8 truggy and especially 13+lb 1/8 MTs can require quite a bit of torque to push them around efficiently. I think as you move higher in pole count, you can move down in size, which has the advantage of weight and space savings on the truck.
I've been looking at the 36x56mm 6-pole on Tower. I think it would move a 1/8 buggy just fine.

I think the advantage of a higher pole motor is that you have less chance for ESC-damaging cogging. Having more poles means that each pole has to move the rotor less distance. So, it helps compensate if the setup is overgeared.

If I put a 4s 20k pack in my car, I could too....:whistle:

Aren't multi pole motors (more than 2) more efficient than those having only 2?? Seems in my boats the more poles the cooler the running

Steve

Both mega and neu make 6+ pole motors. Not sure if they are any better than the 4 pole motors that most use, but I can say that from experience that the 4 pole motors are better than 2 pole motors for heavier vehicles.

No idea if they are more effecient but they should make more torque. As far as using a larger diameter shorter length motor over a smaller diameter longer motor it makes more sense for the large range of rpm that we encounter to use a smaller diameter longer rotor. It will be able to accelerate and decelerate faster than the larger diameter shortor rotor motor.

Another consideration is that the more poles a motor has, the more the ESC has to commutate and may hit a rpm limit.

So it does not make sense if the 6-8 pole motor is 70/80mm? The amp draw will be higher too right?

Brian what do mean by" Another consideration is that the more poles a motor has, the more the ESC has to commutate and may hit a rpm limit"

u meant the esc can't handle the rmp or amp draw?

I read somewhere that higher pole motors have a finer "sweet spot" to them, and that they're best in planes and helicopters where you'll be running them right in their sweet spot and maintaining a fairly constant throttle level.

Does a 2 pole motor accelerate or deccelerate quicker than a 4/6/8 pole motor?

The brushless esc manual will often state a max rpm for 2/4/6/8 pole motor

The max rpm for a 2 pole will be higher than a 4 pole and so on....

So an eight pole may be limited to a small max rpm value depending on the esc.