Patent ID: 11870376
Assignee: ROBERT BOSCH GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. The method as claimed in claim 1, wherein the calibration (140) of the offset angle (PhiO) depending on the ascertained speed signal (n_t) comprises the following steps:
changing (150) the offset angle (PhiO) in a positive or negative direction;
ascertaining (160) the speed signal (n_t0) of the position encoder;
comparing (170) the ascertained speed signal (n_t0) with the previously ascertained speed signal (n_t−1);
changing (180) the offset angle (PhiO) in the same direction if the amplitude of an oscillation of the ascertained speed signal (n_t0) is smaller than with the previously ascertained speed signal (n_t−1);
changing (182) the offset angle (PhiO) in the opposite direction if the amplitude of the oscillation of the ascertained speed signal (n_t0) is larger than with the previously ascertained speed signal (n_t−1); and
ending the calibration (184) if the amplitude of the oscillation of the ascertained speed signal (n_t0) is smaller than a predefinable first limit value (G1).