Quote:
|
Originally Posted by Serum
I don't know artur.
They claim it's measured. I thought dafni told it was done with a prop. why is the current changing, as well as the voltage? It would be easier of it was used as a set parameter.
And can you explain the large dip in efficiency with this one;
http://www.lehner-motoren.com/diagra....s26_liste.txt |
Because with RPM BackEMF comes to play and in addition to active resistance come reactive from inductance (capacity plays as well). Then you can add core hysteresis and eddy currents. Not even touching ESC efficiency which you use to dyno test motor.
When you add timing to equation it becomes tricky, in general with timing set at zero (my program default, adjustable in future) efficiency of the motor has linear relation factor (in calculation) with motor RPM, when you change timing you pushing this relation to be less linear across entire RPM but to be higher in the mostly used range. That is why you see a big dip in efficiency when you get out of tuned efficiency envelope.