Hi all,
I'm developing the code for our custom board with instaspin.
Running our motor at speed of 1kRPM (not so low) with some load applied, we notice something strange.
Our motor car run from 1kRPM to 40kRPM with this parameter:
Rs = 1ohm
Ls = 45uH
Flux = 0.024V/Hz
I max = 6A
We try to start with no load and the motor run at 1kRPM, after that we applied the load of about 12.644 N mm with an electronic brake.
With CCS we notice that the estimated flux change from 0.024 to 0.033 and the motor slow down even if the SpeedRef value doesen't change.
Finally when the motor reach about 600RPM it stall until the load was removed.
Why the flux increase? It could be possible that the estimator are not aligned with the rotor position?
An other question, we added some inductance (10uH) in series with rotor windings for emi purpouse, the Ls value of the user.h must be updated with this value?
Thanks,
Alessandro.