I got to the point of just guessing and changing values randomly (which is bad of course), so at this point it's better to share tha pain and see if someone have any new ideas.
I'm trying (for more than a year now) to build an e-bike following the project from Tom Stanton (https://www.youtube.com/watch?v=9rIIJbDkpN8&list=PLj3Bh6Krv9CWdRwVFwF1xS_-IQH9GBHyo), the first one that he released on ThingVerse, but now that I have everything in place, nothing actually works well enough and I still can't use it.
Unfortunately all my hardware is chip Chinese stuff, I understand the inherent problems but it's the only ones I can afford.
It's a 6355 190Kv sensored brushless motor, with a 4.12 VESC and 12S3P batteries.
The general problem is a complete lack of torque, it's so disappointing it can't even push me forward in the flat with the bike already in movement.
Already changed to FOC as many suggested in the forum, made no real difference.
If I try to configure more than 35A the only thing I get is a high pith screeching noise, the motor shakes in place and cuts off for a fill seconds (vesc reboots?)
I can really feel some power when I set 50A (the vesc limit), but it only works when testing, the problem just get worse if I try to actually use it for real.
My current theories are:
- Need better batteries? (probably not, they are not even getting warm)
- VESC is shit and can't handle the current? (maybe....)
- The motor is too small for a bike. (this is the one I think is the most likely, considering Chinese specs are all bs)
- The relation is too small and the motor can't handle the load. (this is probably also true considering Stanton abandoned this version, but never released the files for the bigger pulley)
So, if anyone dares to help me, what specific information do you need from me so we can proceed???