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

[superek4]

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?

[littlegiant]

Originally Posted by superek4

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?

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.

[_paralyzed_]

Originally Posted by superek4

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

I am skeptical

Keep in mind boats have active cooling. People had great success with kb45's in boats, I burnt mine up in 10 mins in an e-maxx

Originally Posted by littlegiant

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.

every esc has an rpm limit. A 100,000 rpm limit on 2 poles will be 50,000 limit for 4 poles and 25000 for 8 poles and so on..................