Device for determining the angular position of a rotor of a rotary electric machine on the basis of signals delivered by a plurality of position sensors, the device comprising: - a circuit producing a control loop for estimating the position of the rotor, delivering at output a signal representative of the position of the rotor, characterized by the fact that it comprises a circuit for dynamic normalization by the amplitude of the first harmonic of each signal originating from a position sensor, this dynamic normalization circuit being arranged upstream of the circuit producing a control loop for estimating the position of the rotor, this dynamic normalization circuit receiving at input: - each signal originating from a position sensor, and - at least one image of the signal representative of the position of the rotor, this image being in particular a linear combination of the cosine and the sine of an angle measured with respect to the reference position of the rotor, this dynamic normalization circuit being configured to: - demodulate each signal originating from a position sensor by the image of the signal representative of the position of the rotor, - determine, at the end of this demodulation, the amplitude of the first harmonic of this signal originating from a position sensor, and - normalize each signal originating from a position sensor by dividing it by the amplitude of the first harmonic of said previously determined signal. - a circuit producing a control loop for estimating the position of the rotor, delivering at output a signal representative of the position of the rotor, characterized by the fact that it comprises a circuit for dynamic normalization by the amplitude of the first harmonic of each signal originating from a position sensor, this dynamic normalization circuit being arranged upstream of the circuit producing a control loop for estimating the position of the rotor, this dynamic normalization circuit receiving at input: - each signal originating from a position sensor, and - at least one image of the signal representative of the position of the rotor, this image being in particular a linear combination of the cosine and the sine of an angle measured with respect to the reference position of the rotor, - each signal originating from a position sensor, and - at least one image of the signal representative of the position of the rotor, this image being in particular a linear combination of the cosine and the sine of an angle measured with respect to the reference position of the rotor, this dynamic normalization circuit being configured to: - demodulate each signal originating from a position sensor by the image of the signal representative of the position of the rotor, - determine, at the end of this demodulation, the amplitude of the first harmonic of this signal originating from a position sensor, and - normalize each signal originating from a position sensor by dividing it by the amplitude of the first harmonic of said previously determined signal. - demodulate each signal originating from a position sensor by the image of the signal representative of the position of the rotor, - determine, at the end of this demodulation, the amplitude of the first harmonic of this signal originating from a position sensor, and - normalize each signal originating from a position sensor by dividing it by the amplitude of the first harmonic of said previously determined signal.