2024-08-17 06:26 AM
Hi.
I'm driving a PMSM with FOC (Workbench file attached for reference) with MCSDK 6.3.0 in torque mode.
Main parameters:
With the default settings of OCP -- 45 Apk and 47.06 ns filter -- OCP is reliably triggered when Iq reference goes above about 7.5 A. To get to 20 A I have to seriously increase both the filter duration and the threshold, which feels a bit unsafe...
Measured Iq and Id plots have very noticable first-order oscillations, but everything everything seems reasonably normal and torque response (and the speed control as well) is good:
The magnitude of Iq and Id's oscillations can be somewhat reduced by a more agressive PID tune (essentially increasing the cut-off frequency of the current loop) but this eventually causes to loop to become unstable (as expected).
I have two questions: