jskounakis
1 mW
- Joined
- Jan 25, 2022
- Messages
- 17
Hello,
I just got a ME1803 electric motor from kit-elec-shop, and unfortunately, noticed some wear and tear (like rust on the shaft). While that on its own didn't bother me much, when I run some tests the shaft got relatively hot starting from the bottom near the motor body and gradually increasing, especially at high RPM.
**I also noticed there is a seal at the shaft base, could it be the source of the issue? Some sort of friction?
That got me really worried since the shaft is supposed to stay cool (doesn't have any wiring, thus only heat should come from the windings via the air gaps. The sound at the end of the video linked was also alarming.
Here is some technical info regarding setup and testing, here is some visual help.
Running FOC with a VESC 75/300 controller hooked to a 52V Li-Ion battery.
The test was no load, didn't have water cooling hooked up (but again, the internal thermistor showed 18C and the body was cool)
The problem starts at around 30-50% duty cycle (should be around 2-3K RPM)
Measured battery current at around 5-7A, phase current at 15-20A max.
Has anyone faced similar issues/or has any idea how to handle them?
I just got a ME1803 electric motor from kit-elec-shop, and unfortunately, noticed some wear and tear (like rust on the shaft). While that on its own didn't bother me much, when I run some tests the shaft got relatively hot starting from the bottom near the motor body and gradually increasing, especially at high RPM.
**I also noticed there is a seal at the shaft base, could it be the source of the issue? Some sort of friction?
That got me really worried since the shaft is supposed to stay cool (doesn't have any wiring, thus only heat should come from the windings via the air gaps. The sound at the end of the video linked was also alarming.
Here is some technical info regarding setup and testing, here is some visual help.
Running FOC with a VESC 75/300 controller hooked to a 52V Li-Ion battery.
The test was no load, didn't have water cooling hooked up (but again, the internal thermistor showed 18C and the body was cool)
The problem starts at around 30-50% duty cycle (should be around 2-3K RPM)
Measured battery current at around 5-7A, phase current at 15-20A max.
Has anyone faced similar issues/or has any idea how to handle them?