Device for determining the angular position of a rotor of a rotating electric machine

A device for determining an angular position of a rotor of a rotary electric machine based on signals delivered by a plurality of position sensors, the device comprising:

• a circuit for estimating a position of the rotor via application of a control loop, the circuit for estimating the position of the rotor delivering as output a signal representative of the position of the rotor, and
• at least one circuit for performing dynamic processing of an odd-order harmonic of a signal resulting from the signals delivered by the plurality of position sensors, the circuit for performing dynamic processing receiving as input:
• the signal resulting from the signals delivered by the position sensors, and
• the signal representative of the position of the rotor,
• the circuit for performing dynamic processing being placed upstream of the circuit for estimating the position of the rotor, and the circuit for performing dynamic processing being configured to:
• generate at least two signals representative of a phase and of an amplitude of an odd-order harmonic for which it is desired to compensate, via:
• synchronous demodulation of the signal resulting from the signals delivered by the position sensors by a reference signal at said harmonic and in phase with the signal representative of the position of the rotor, said reference signal being generated based on the signal representative of the position of the rotor, and
• low-pass filtering,
• reconstruct a signal at said harmonic on the basis of the reference signal at said harmonic in phase with the signal representative of the position of the rotor and using the signals representative of phase and amplitude thus generated via synchronous modulation, and
• compensate for said harmonic by subtracting from the signal resulting from the signals delivered by the position sensors the signal at said harmonic thus reconstructed.