I am using MKV30 microcontroller for sensorless vector control of PMSM. I want to use the backemf observer and angle tracking observer to measure the speed. In RTCESL, there are two types of backemf observers available, so whats the difference between observer AB and DQ. Is the difference is only about ref axis or something else?
Is there anything specific like the different observers works for different types of motors (like surface mounted)?