Running only 50A per motor, go figure… The sealed Maytechs suck monkey balls.
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Its not the Amp settings that cause overheating.
Wh/km usage plays a role. So basically your ride style is affecting motor heat. You can try to spin your motor with wheels up at no load, full ERPM for 5 minutes.
Log the test run and you’ll be surprised how much heat that generates at 1amp no load current. Probably after 5 minutes youll have temp shutdown.
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I have guys locally running 90 amps with pneumatics on the open can and you can grab them after a 10 mile aggressive ride.
If my temps hit 80 they’re getting sold. I’m not a fan of no brake scenarios
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No brake scenario is not realistic, since VESC FW has 15% TEMP HEADROOM for the brakes.
Correct.
2 minutes on the bench, no load, 95 degrees (2A).
2 minutes in hot weather, 45kmh, 95 degrees (40A).
Only going at ~30kmh will provide enough airflow (and little enough load) to stay below 85 degrees.
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We used the hot weather for a scientific approach to tackle overheating issues. Do another test and see how much the heat shoots up after stopping the board.
I can now run my motor at no load 40K ERPM and 57 deg C core temp and 34 deg C magnet temp.
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Did that a while ago. 10 seconds after stopping the temperature goes up another 10 degrees before actually going down again. But pouring water over the motor has it evaporate almost instantly.
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After a tweak to my motors I do only see 1deg rise.
Basically your motors store more thermal energy and run a bit hotter than your readings. The temp shoot up shows that.
What kind of tweak are we talking about?
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Yes, I did.
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Airflow improvements. We will offer a part soon. It will fit to all of our motors. Do you have a set of our motors?
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Not any more. Currently I use SK8 and Maytech sealed motors.
These Motors can’t be tweaked easily. Both have a no proper air cooling design.
I give yous treefitty! These cans are hot!!
This is really weird
And putting the hand on the motor it is indeed hot? Either the big bearing has enough drag to cause this much heat or the design has huge core losses (too thick magnets for example)
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The core losses on e-skate motors are big enough to overheat them in 3-5 minutes if you have no cooling.
Grab any motor you have to hand, run it at full speed and you will be able burn your fingers within minutes.
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True
Didn’t realize they were running full speed
Would be good to plot one of the Maytech motors vs one that people doesn’t have overheating problem to see how they compare in temperature increase rate at full rpm, no load
You would need a standardised test bed, same gearing, wheel diameter, same weight, same ambient temp, same ride. Otherwise its like comparing apples to oranges.
The no load test will only tell you how big the core losses are and even then you would need to make sure that the motor is not attached to thermally conductive material.
Can’t touch them, you’ll burn you hand/fingers.
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