Patent ID: 11881796
Assignee: ROLLS-ROYCE PLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 12:
13. A controller for use in a system comprising a permanent magnet synchronous electric machine (PMSM) and associated power electronics, the controller being configured to:
receive d-axis and q-axis stator current values (id, iq) representative of a measured PMSM current;
receive d-axis and q-axis reference current values (id*, iq*);
based on the stator current values (id, iq) and the reference current values (id*, iq*), determine d-axis and q-axis current correction values (Cd, Cq) by determination and summation of a plurality of current correction components including a fundamental current correction component (Cd,0, Cq,0) and at least one harmonic current correction component (Cd,n, Cq,n);
determine corrected reference current values (id**, iq**) as a sum of the reference current values (id*, iq*) and the current correction values (Cd, Cq); and
control the PMSM using the corrected reference current values (id**, iq**) as reference current inputs to the DBPCC scheme.