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e-bike vesc6 too high erpms?

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artteth
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e-bike vesc6 too high erpms?

hi

trying to setup vesc 6 on my e bike 

i use this motor https://www.hacker-motor-shop.com/Brushless-Motors/Hacker-Q80/Q80-8M-V2.htm?shop=hacker_e&SessionId=&a=article&ProdNr=37418021&p=2986

12slipo

in foc mode have next problem

on high erpms motor starts "shaking" 

i make all autodetects 

under load same thing 

here is video 

https://www.youtube.com/watch?v=6S78Ys9n-u4

current control mode

on the video we can see that current starts osciliating on around 70-80% of erpms 

max erpms on 12s motor can go is almost 120 000 and i set max erpm to 140 000

how to solve problem or what i need to try (some settings in foc tab?)

thanks

(starts from 0 is super without halls)

 

and some faults codes (but it only current abs because current starts ostiliating and go out of range )

 

 

benjamin
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That's quite a lot of motor ERPM. Over 100k needs a bit of parameter tweaking on some motors. One thing you can try is doubling the observer gain and see if it makes any difference. You can also increase the FOC switching frequency to 25 kHz and make sure that sample in V0 and V7 is enabled.

artteth
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VESC FreeVESC Original
Joined: 2017-09-05 00:48
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thanks benjamin

will try it all and will make video

and its problems in bldc mode if i push 100%throttle (up to 80%all ok) too(but hard to represent on the bench but i will try and will make video)