Quark on 6S with Mega 6 pole

[speedracer1129]

Originally Posted by What's_nitro?

The controller is thermalling so fast mainly because of the 6-pole motor. Think about it. If 2 poles = 6 pulses per revolution, then 6 poles = 18 pulses per revolution. The ESC is working 3 times harder than usual. Add higher gearing and maximum voltage and that's pretty hard on a controller. Do you have a fan you could use on it? I think 5s with a fan would work fine.

I would agree with you, but I can't due to the following. Mega recommends only CC ESC's and they have no issues running a CC ESC that was designed to run a 2 pole motor?!? This leads me to believe that the Quark programming has alot to do with it. Worst case scenario, the guys at CC could maybe speed up the MMM a little( ugh, ugh) and I will go that route. We will see....

[lincpimp]

still...holding...breath...for...mamba...monster.. .maxx!

[What's_nitro?]

Could it be a timing issue? Depending upon the position of the rotor magnets relative to the stator windings, it can draw much more current when the stator is energized. I don't know which way you would try adjusting the timing to correct the problem, but it was just a thought.

[MTBikerTim]

Originally Posted by lincpimp

still...holding...breath...for...mamba...monster.. .maxx!

DON'T DO IT LINCPIMP! DON'T DO IT.

[lincpimp]

Originally Posted by MTBikerTim

DON'T DO IT LINCPIMP! DON'T DO IT.

Cough Cough. Help CC I don't think I can hold much longer!

Originally Posted by speedracer1129

I would agree with you, but I can't due to the following. Mega recommends only CC ESC's and they have no issues running a CC ESC that was designed to run a 2 pole motor?!? This leads me to believe that the Quark programming has alot to do with it. Worst case scenario, the guys at CC could maybe speed up the MMM a little( ugh, ugh) and I will go that route. We will see....

There should be no difference in terms of which ESC can run however many poles. Sure, firmware has a part in it, but the ESC is still limited to firing the phases only so fast (whether it be firmware or hardware related, that limitation is still present). The more poles you have, the more phases that are in the motor, so the mork work the ESC really does have to do to create one revolution.

Mega also suggests keeping their motors under about 50,000 RPM on their motor selection tables. I'm willing to take a shot and say that this is due to their higher pole counts, and relates back to what What's Nitro was saying. That's also probably why they run just fine on a mamba ESC (the RPM that the motor spins is significantly lower than the problem setup mentioned by the OP).

I'm inclined to agree with him 100% that the number of poles coupled with the voltage it is being run on (a 6 pole motor being run at around 60,000 RPM is going to stress out the ESC, and the gearing is some nasty icing on the cake) is certainly contributing to the problem.

[sikeston34m]

I have wound 12 pole outrunner motors quite high with direct to diff configuration with NO problems using the Quark 125 Monster Pro. 12 pole motors require twice the switching per revolution as a 6 pole motor does. I've wound the 12 pole motors up to around 25,000 rpm's. I don't think the Quark switching ability is the problem really.

After taking another look at your setup. You have quite the Battery configuration there. It can definately deliver. Just guessing, 220 amps continous, probably somewhere about 300 amps Burst rating.

Ok, with that being said. Mega only recommends winding their Mega 22/30/1e to around 44,000 rpms and only rates this motor up to 12 nimh cells or 4S with a current draw of 70 amps max. On 6S, it's going to spin 63492 rpms and will definately overheat very quickly even with dumptruck gearing. I can only imagine what the amp draw is doing with the tall gears, especially on take off.

I would try 5S with lower gearing, like Linc said. Then maybe, just maybe, move up to 6S, only after being comfortable with the temps you are seeing on 5S.