So, I am setting up a Votol EM-100 to understand parameter changes. I am connected to a medium sized PM brushless outrunner motor attached to an aluminum bracket with nothing connected to the output shaft. This configuration has worked fine with many controllers I have tested, however, with the Votol, after about half throttle, the motor took off. I had to quickly pull power to the controller for fear of the motor exploding. Last reading on the Display of the Votol GUI, was above 5900 RPM. The Motor is a thin 8" diameter custom with a wind of around 55KV. I was in medium speed but even with 200% field weakening (even if it was in high or S mode), I do not believe I could get the motor to run north of 5000 RPM while on the 49VDC battery I was running.
I believe I remember motor runaway with no load before, just never observed it from testing numerous controllers (Yuyang King, Kelly, Greentime, countless generics). I am interested to understand why this might be happening and if anyone else has observed this. After a quick underwear change, I am hopeful this would not happen when in a lightweight vehicle or desending down a hill. Typically, you release the throttle (Hall effect type), I would prefer the motor to spin down and stop accelerating.
Thanks,
Russ
I believe I remember motor runaway with no load before, just never observed it from testing numerous controllers (Yuyang King, Kelly, Greentime, countless generics). I am interested to understand why this might be happening and if anyone else has observed this. After a quick underwear change, I am hopeful this would not happen when in a lightweight vehicle or desending down a hill. Typically, you release the throttle (Hall effect type), I would prefer the motor to spin down and stop accelerating.
Thanks,
Russ