Method for configuring a variable speed drive for supplying an electric motor, the method comprising the following operations: - applying a sequence S1 of motor voltages to the electric motor via the variable speed drive; - obtaining measurements M1 of motor currents during the application of the sequence S1 of motor voltages; - determining a feature C1 of the electric motor on the basis of the measurements M1 of motor currents; - determining a type of electric motor at least as a function of the feature C1; - configuring the variable speed drive as a function of the determined type of electric motor; the method being characterized in that the voltage sequence S1 is applied successively twice, in at least two non-colinear voltage directions, according to the following operations: - applying the sequence S1 of motor voltages to the electric motor in a direction D1; - obtaining measurements M11 of motor currents during the application of the voltage sequence in the direction D1; - in case of determination that the measurements M11 exhibit oscillations, determining that the electric motor exhibits an anisotropic property; - otherwise: -- applying the sequence S1 of motor voltages to the electric motor a second time at least in a direction D2 non-colinear to the direction D1; -- obtaining measurements M12 of motor currents during the application of the sequence S1 of motor voltages in the direction D2; -- in case of detection that the measurements M12 exhibit oscillations, determining that the electric motor exhibits an anisotropic property; -- otherwise, determining that the electric motor does not exhibit any anisotropic property. - applying a sequence S1 of motor voltages to the electric motor via the variable speed drive; - obtaining measurements M1 of motor currents during the application of the sequence S1 of motor voltages; - determining a feature C1 of the electric motor on the basis of the measurements M1 of motor currents; - determining a type of electric motor at least as a function of the feature C1; - configuring the variable speed drive as a function of the determined type of electric motor; - applying the sequence S1 of motor voltages to the electric motor in a direction D1; - obtaining measurements M11 of motor currents during the application of the voltage sequence in the direction D1; - in case of determination that the measurements M11 exhibit oscillations, determining that the electric motor exhibits an anisotropic property; - otherwise: -- applying the sequence S1 of motor voltages to the electric motor a second time at least in a direction D2 non-colinear to the direction D1; -- obtaining measurements M12 of motor currents during the application of the sequence S1 of motor voltages in the direction D2; -- in case of detection that the measurements M12 exhibit oscillations, determining that the electric motor exhibits an anisotropic property; -- otherwise, determining that the electric motor does not exhibit any anisotropic property. -- applying the sequence S1 of motor voltages to the electric motor a second time at least in a direction D2 non-colinear to the direction D1; -- obtaining measurements M12 of motor currents during the application of the sequence S1 of motor voltages in the direction D2; -- in case of detection that the measurements M12 exhibit oscillations, determining that the electric motor exhibits an anisotropic property; -- otherwise, determining that the electric motor does not exhibit any anisotropic property.