METHOD AND DEVICE FOR THE ANGLE SENSOR-FREE DETECTION OF THE POSITION OF THE ROTOR SHAFT OF A PERMANENTLY EXCITED SYNCHRONOUS MACHINE ON THE BASIS OF CURRENT SIGNALS AND VOLTAGE SIGNALS

摘要

Disclosed are a device and a method for determining position information of the rotor shaft of an electric machine based on at least one recorded input signal of the electric machine, the recorded input signal being supplied to a model of the electric machine. The position information of the rotor shaft is determined with the aid of the model, based on the supplied input signal, the model mapping nonlinear saturation effects of the electric machine. The model of the electric machine is an extended Kalman filter in which the nonlinear saturation effects of the electric machine are described by a polynomial.