My motor get heat really quickly like if I ride like around 35mph 40 for like 10min my motor go to 86c easy I can still touch them but is very hot and the board slow down I have the temperature cutoff start at 90c but when I it 85 86 I have no speed no torque
And if I ride more easily the motor still go to 80c
Belt are not to tie correct in place the screw for the motor don’t touche anything
My set up is 12s7p motor sk3 192 sensored
Gear 62t 15t wheel 7inch
Motor 60 -60A
Battery 50A -15
I have another board almost the them except the sk3 are not sensored the wheel are 8inch the gear are 66 15 and the motor don’t get to worm
I’m going to look at it tomorrow
But the think I want to know is if I have a problem or is just the way is it
Bc lot of people I know use 62t 16t
And the set up is 60 -60
Battery 30 I know is almost half as my -10
And 60000erpm and is look like they do heat to much
And my second board also have the same set up at th one heat up and I have not problem
I was thinking I have some problem
here is some related info from another thread (relating to changing the battery current limit)
take a look at the green line, bottom middle chart (ohmic heating watts)… this is for changing only the 60a battery limit to 30a battery limit.
notice the effect the change has on your thrust in pounds (red line, bottom left chart – vehicle thrust in pounds, 2 motors) – in this scenario the rider can still reach the same top speed on a 10% slope (yellow line, bottom left chart), but the acceleration is less with 30a battery vs 60a battery.
that’s more of an indication of a problem, but i’m not sure exactly what’s causing the problem…
if one motor was getting much hotter than the other on the same board i’d suspect maybe a short in the motor windings…
but if both motors on the same board are getting equally warm, and you have another board with the same setup and those motors stay cooler, i’d suspect the motors on the board that’s getting warmer have higher electrical resistance due to the way they’re constructed… such as would be the case if the windings were a thinner gauge wire but with the same # of turns to keep the kv the same. less copper in the motor makes things get warmer for the same performance.
you wouldn’t need higher kv… you’d want the same kv for same performance… but lower electrical resistance (generally larger physical size motor same kv with more copper) for less heat but the same torque.
Do you mean it still gets hot when riding slow/normal from start without hills or racing?
I would say it’s a short in the windings or cables inside the motor like @professor_shartsis mentioned.
I don’t think it’s your gearing or settings.
Remove the belt and spin the motor by hand, do you feel any resistance?
I had the same happening with 2 motors. They reached 80 °C within 4 minutes easy cruising. I realized there is some resistance when spinning, but not comparable to the resistance when holding 2 phase wires together.
When I moved the phase wires the resistance was sometimes gone. So there was some kind of short inside the motors. Got them replaced.
Your motor is not sealed so it should never get hot. I can ride 2-3 hours non stop (Urban Carver, dual 6355) and the motors are not even warm.