Hello,
I've built an electrical winch for paragliders with a 12kw hub motor. It is operating with a VESC 75/300.
Today we wanted to test it's drag force before we are actually going to use it to launch a real paraglider.
We attached a "Quad" (a motorcycle with 4 wheels) to the line and started pulling. To measure the drag force in kilogram (or daN) we were using heavily the brake of the quad.
As you can see in this video: https://youtu.be/rusCd4p7q5k
the Motor is pumping /oscillating heavily under load.
When driving backwards under load, the winch was nicely unwinding the line, no issues with oscillation.
Any idea how this pumping / oscillation can be solved?
Thanks in advance for any hints
VESC is not good in determine the parameters for the heavy engines.
Tuning is some sort of the art. You even can burn it easy on the current ripple. I have burned two.
There are a lot of different reasons. I would suggest to make the graphs to analyze.
Good luck with that!
Probably the motor parameters measured during the motor detection are wrong.