METHOD FOR DETERMINING A CORRECTION VALUE WHICH DESCRIBES AN ANGULAR DIFFERENCE BETWEEN AN ASSUMED AND AN ACTUAL POSITION OF A D-AXIS, CONTROL DEVICE AND INVERTER

摘要

A method for determining a correction value for a control device (3) for an electrical machine (5), wherein the correction value describes an angular difference between a position of a d-axis of the electrical machine (5), which position is assumed in an initial configuration of the control device (3) on the basis of rotor position information (8) of a rotor position transmitter (7), and an actual position of the d-axis, wherein a zero current is impressed into stator windings of the electrical machine and the correction value, in a rotating state of a rotor of the electrical machine (5), is determined depending on - a d-voltage value which describes a d-component of a stator voltage which is prespecified by the control device (3) in the initial configuration, - a q-voltage value which describes a q-component of the stator voltage which is prespecified by the control device (3) in the initial configuration, - a flux value which describes a magnetic flux of the rotor, - a rotation speed value which describes the rotation speed of the rotor in the rotating state, and - a calibration value which describes a rotation-speed-dependent voltage error in the d-component of the stator voltage.