Doctorbass
100 GW
Hello guys,
I got a Sur ron motor and controller recently to play with.
I discovered that when running no load, the shaft is becoming significantly hot! I know that running a motor no load without power produced is a like a pure noise and heat generator and all energy is likely going into heat, but it was interesting to see that the shaft too was becoming hot.
I have two hypothesis:
1: the bearing ad significant friction and generate heat ( maybe the seal?)
2: the eddy current loss are quite high in that motor and the rotor design is not so optimized for good mag flux path...? ( magnet seem pretty normal arrangement inside, no ipm,
Even Bruno noticed that and this gave me a clue that this is not an isolated case...
https://youtu.be/aRzmNqAuEhQ?t=306
Did some of you guys experienced that?
Doc
I got a Sur ron motor and controller recently to play with.
I discovered that when running no load, the shaft is becoming significantly hot! I know that running a motor no load without power produced is a like a pure noise and heat generator and all energy is likely going into heat, but it was interesting to see that the shaft too was becoming hot.
I have two hypothesis:
1: the bearing ad significant friction and generate heat ( maybe the seal?)
2: the eddy current loss are quite high in that motor and the rotor design is not so optimized for good mag flux path...? ( magnet seem pretty normal arrangement inside, no ipm,
Even Bruno noticed that and this gave me a clue that this is not an isolated case...
https://youtu.be/aRzmNqAuEhQ?t=306
Did some of you guys experienced that?
Doc
