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

Claim 7:
8. A non-transitory, computer-readable medium, comprising commands which, when executed by a computer, cause the computer to calibrate an offset angle (PhiO) of a field-oriented control of an electric machine (210) between an angle signal (W) of a position transducer (220) and the direction of the rotor flux (RF), by:
periodically varying (120) a current vector (Is) along a line of constant torque in a d/q coordinate system of field-oriented control;
ascertaining (130) a speed signal (n_t) of the position transducer of the electric machine (210); and
calibrating (140) the offset angle (PhiO) depending on the ascertained speed signal (n_t).