Quote:
Originally Posted by Nemo
Maybe somebody can satisfy my curiosity here. Why would a sealed can motor survive a stall better than an open motor that can be cooled more easily? BAG and 9015 are roughly the same size and power, but BAG survives a stall for longer. Is it because it's sealed or in spite of that?
Edit: Is it the lack of oxygen?
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Thermal mass. A fan cooled motor is designed as a fan cooled motor and if it is operating at zero or low rpm the fan does not cool the motor. A sealed motor on the other hand is designed without forced air cooling in mind so while operating at 0 or low rpm will cause it to heat up more than normal it is still operating as designed, ie w/o the benefit of a fan cooling it.
The fan cooling is what allows a motor to have a higher power to weight ration vs a sealed motor.