Determining a flux linkage

A method for determining the flux linkage of an electric machine comprising steps of sampling a waveform of an induced voltage to the current, but electroless plating machine, determining a function for the description of zero crossings of the waveform of the induced voltage as a function of the time of mapping the sampled voltage by means of the specific function in a signal with a constant period and amplitude, and determining the flux linkage on the basis of the signal.