Hi,
We've built a motor testing rig to test brushless outrunners. To record the force, turned it on for one minute and logged the force throughout the minute. After on the first round we measured 1.7N average force. After the motor was in the water for a couple of minutes, in the last test we only measured 1.4N average force. The only difference between the two runs is that the motor was in the water for longer. Are there any obvious reasons for this?
Thanks
Problem with Brushless Thrusters
Re: Problem with Brushless Thrusters
@gsisrov,
Possible increased bearing friction after the first run in the water?
Regards,
SSN626B/TCIII
Possible increased bearing friction after the first run in the water?
Regards,
SSN626B/TCIII
- puzzler300
- Posts: 55
- Joined: Jan 2nd, 2013, 12:26 pm
- Location: St. Cloud, Mn
Re: Problem with Brushless Thrusters
Is your prop coming loose? Mind tends to do that, you can especially tell if there is a loud rubbing/vibrating noise at higher rpms.
Re: Problem with Brushless Thrusters
Sounds logical.Possible increased bearing friction after the first run in the water?
Could also be a current-leakage, a heated ESC or growing short circuit. Did you seal the coils of the Motor with some polish? Do you use motors with good quality? Did you try a third test?
- puzzler300
- Posts: 55
- Joined: Jan 2nd, 2013, 12:26 pm
- Location: St. Cloud, Mn
Re: Problem with Brushless Thrusters
Are you sure that your battery is fully charged?