RaserTech, brushless power from induction...

[Serum]

Torque of a bl motor is as flat as possible.

[zeropointbug]

Is it? I suppose it does seem pretty damn flat with wheelies on demand. You wouldn't happen to have a graph of as many brushless motor torque curves?

Also, what is the maximum the 540C-7XL motor is capable of putting out?

thanks

[MetalMan]

Originally Posted by zeropointbug

Also, what is the maximum the 540C-7XL motor is capable of putting out?

thanks

I think in order to answer that, the question would be "how long?" Since torque is proportional to amps, the motor could put out as much torque as the input can supply. However, as the amp draw increases (after the peak efficiency), efficiency will drop. After an amount of time, the motor would become very hot due to the power converted to heat (from the low efficiency). And the longer the motor is putting out the high number of amps, the hotter it will get.

[zeropointbug]

yes I know, but there is a magical behavior called back EMF which is going to limit the torque at higher rpm's, fundamental to what a motor is. But i said max power output, not the max torque output which would be at 0 rpm (if no cogging).

[zeropointbug]

Just one other thought, LMT should start using Bifilar coils in their motors (or why doesn't any motor manufacturer use them.) They would drastically cut self-inductance of the winds would it not?! This would mean less loses in the motor, easier on the controller, and higher power densities i think. Any thoughts?

***A Bifilar, where two or more 'winds' are connected togethor via the end of one comes back and connects to the start of the other. Imagine a two planar spirals, the inner of one 'wind' will come back a loop into the second spiral 'wind'.

[MetalMan]

Originally Posted by zeropointbug

yes I know, but there is a magical behavior called back EMF which is going to limit the torque at higher rpm's, fundamental to what a motor is. But i said max power output, not the max torque output which would be at 0 rpm (if no cogging).

Looking back at your post, I didn't see any mention of power, so I assumed you meant torque.