CPC H02P 21/18 (2016.02) [H02P 25/089 (2016.02); H02P 2203/05 (2013.01)] | 20 Claims |
1. A method for use with a synchronous machine having a stator and a rotor with or without permanent magnets, the method comprising:
measuring electric current of the synchronous machine responsive to the synchronous machine being actuated via clocked terminal voltages;
determining a magnetic flux linkage based on the clocked terminal voltages and the measured electric current;
storing multiple profiles of the magnetic flux linkage as a function of rotation of the rotor in a model for different electric current values, from which a profile is selected according to the measured electric current;
using the selected profile of the magnetic flux linkage as a function of rotation of the rotor, under a boundary condition of an at least two-dimensional electric current vector that is unchanged in coordinates of the stator, to detect a position of the rotor, wherein only the magnetic flux linkage and the electric current vector, and the stored profiles of the magnetic flux linkage, are used for detecting the position of the rotor, and the position of the rotor is neither directly nor indirectly fed back to detect a subsequent position of the rotor; and
controlling the synchronous machine according to the rotor position.
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