cheap 2000watt motor

[Hayden]

http://www.wattsuprc.com.au/product_detail.asp?pid=ZP07
I don’t get it, which is the better motor the lmt 1930/8 is a lot more expensive and this 2000watt motor is so cheap I think the 1930/8 is way better am I right?

[coolhandcountry]

That is an out runner for one thing.
It would have gobs of torque.
The motor is open so subject to stuff going in the motor.

[Hayden]

would it have more over all power than my 1930/8?

[coolhandcountry]

I wouldsay yes. I don't think all the escs will be able to run it though. Some of the out runners are like 8 pole motors.

[Hayden]

O...8 pole
Thanks

[coolhandcountry]

I not sure if that one is or not. I have read some of them are multi pole motors though. If the can is like 28 mm across it is like having a 26 mm rotor or so. I wanted to test some on these but never did. If you do get could You let us know how it works out.

[BrianG]

By 8 pole, I assume you mean there are 8 electromagnets (4 pairs) energized at any one time time as opposed to only 2 electromagnets (one pair) on a typical inrunner?

I noticed that on both of my BL motors (8XL and 10XL) that if I turn the shaft by hand, I can feel two distinct magnetic "detents" in one rotation. This feeling is stronger in the 10XL. Does this mean I would feel 8 detents in one rotation for an 8 pole?

[SpEEdyBL]

A two pole motor has 3 electromagnetic poles and a 4 pole has 3 pairs of coils, each opposite from one another, so 6 electromagnetic poles.

[seth556]

The only problem I see is it has a low Kv rating.

[BrianG]

Originally Posted by SpEEdyBL

A two pole motor has 3 electromagnetic poles and a 4 pole has 3 pairs of coils, each opposite from one another, so 6 electromagnetic poles.

Doh! That makes sense. I sometimes forget these are three phase. :)

So, following that logic; if a typical two pole motor has say 7 turns, does that mean a four pole 7 turn motor has both sets of 3 poles energized at once? This would in effect put each 7 turn pole in parallel with each other, correct? Which would pull as much current as a 3.5T motor, right?

I'm just trying to figure out what makes driving a motor with more than two poles so difficult...

[MetalMan]

Originally Posted by seth556

The only problem I see is it has a low Kv rating.

How is that a problem? With lower kv, it's actually less of a problem since you can run higher voltage and gain greater efficiency (that means more power).

[coolhandcountry]

WEll the titans turn about 1200 kv. If you run 6s lipo on it with same gearing it will be faster than the stock setup.

[Hayden]

my 1930 is so free to turn you hardly notice the fields but we have a different motor at work that is near impossible to turn over with you fingers lol “you need a pair of pliers” what’s the difference?

[Serum]

a plettenberg maxximum or a bigmaxximum are very hard to turn with your hand. It pretty much depends on the design of the motor. I don't know what the reason is for choosing a certain 'resistance' i noticed the startup of the plettenbergs are much, much harder than the startup of the motors you can turn easy.