Can you help me troubleshoot/eliminate this motor noise?

M

mkoch820

100 µW
Joined
May 23, 2016
Messages
8
Hi!
Getting close finishing my first DIY electric longboard. Amongst many other things, I have a problem with the motor. When it starts to turn, it produces a high pitched/screaming/squeeking noise, I really want to get rid of. As the motor reaches higher RPM, the noise is gone.... What can I do?
Setup: Alien 6374 170KV motor, Turnigy Trackstar 200A ESC, 5000mAh 8S 25C LiPo battery (2x4S series).

Here is a demonstration: https://www.youtube.com/watch?v=l1fFfSnTDvs
(P.S.: only that white plastic round thing is eccentric (temporary solution), the wheel pulley is perfectly drilled.)

I appreciate any help!
 
I found this video (https://vimeo.com/168684315) , this guy was using a turnigy k force 120A-HV OPTO V2 5-12S Brushless ESC, and an identical motor as mine, spins up without the noise. Does this mean, that ESC has vector control? It's not mentioned at its list of features...
I know that VESC has FOC, but could it handle my motor? In specifications it says max amp 80A, recommended ESC 100-150A. The VESC is rated for 50A continuous current, no?
Thanks, sorry for the noob questions...
 
mkoch820 said:
I found this video (https://vimeo.com/168684315) , this guy was using a turnigy k force 120A-HV OPTO V2 5-12S Brushless ESC, and an identical motor as mine, spins up without the noise. Does this mean, that ESC has vector control? It's not mentioned at its list of features...
I know that VESC has FOC, but could it handle my motor? In specifications it says max amp 80A, recommended ESC 100-150A. The VESC is rated for 50A continuous current, no?
Thanks, sorry for the noob questions...
Click to expand...
Of course VESC will handle your motor. You can search around the forum, there are plenty of people who use 6374 motor with VESC. But you already bought another ESC so this will be a waste of money. Do you have documentation for your ESC? Most often ESC can be configured. Try to change some parameters and see if it helps.

UPD: here is your manual http://www.hobbyking.com/hobbyking/store/uploads/885848202X363531X7.pdf
Try to change
8. Motor timing
4. Punch control
???
 
Thanks!
I just read that low kv big motors usually need timing set to higher values. Also that punch control set to soft could lead to more rattle and motor cog... I will change those values and report back!
(http://www.diyourself.ru/workshop/the-new-and-improved-brushless-electric-scooter.html)
 
You must log in or register to reply here.
Back
Top