US 11,936,316 B2
Position estimation for permanent magnet synchronous machines via rotor flux space vector identification
Pawel Szymula, Bolecin (PL); and Prerit Pramod, Saginaw, MI (US)
Assigned to Steering Solutions IP Holding Corporation, Saginaw, MI (US)
Filed by STEERING SOLUTIONS IP HOLDING CORPORATION, Saginaw, MI (US)
Filed on Jul. 12, 2022, as Appl. No. 17/863,335.
Prior Publication US 2024/0022194 A1, Jan. 18, 2024
Int. Cl. H02P 23/14 (2006.01); H02P 25/022 (2016.01); H02P 27/08 (2006.01)
CPC H02P 23/14 (2013.01) [H02P 25/022 (2013.01); H02P 27/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling a permanent magnet synchronous machine (PMSM) having windings, comprising:
determining an estimated back-electromotive force (BEMF) generated in windings of the PMSM based on an estimated voltage applied to the windings of the PMSM, an estimated motor current of the PMSM, an estimated motor circuit resistance, and an estimated synchronous inductance of the PMSM;
determining an estimated permanent magnet (PM) flux linkage in the PMSM based on the estimated motor current of the PMSM;
determining a BEMF correction term based on the estimated PM flux linkage; and
determining an estimated rotor flux space vector based on the estimated BEMF and the BEMF correction term.