Device and method for calibrating a magnetic angle sensor

A method for calibrating a magnetic angle sensor, comprising:

• measuring, for each angle position of a plurality of angle positions within a 360° rotation of a measurement object, a first sensor signal for a first magnetic field component and a second sensor signal for a second magnetic field component aligned orthogonal to the first magnetic field component,
• wherein, over the plurality of angle positions, the first sensor signal and the second sensor signal are each 360° periodic and representable as a Fourier series with a Fourier component of a fundamental frequency and at least one Fourier component of a harmonic;
• determining the at least one Fourier component of the harmonic for the first sensor signal and the second sensor signal based on a deviation between a circular path and a 360° trajectory of an angle measurement vector defined by the first and the second sensor signals supplemented by the at least one Fourier components of the harmonic for the first sensor signal and the second sensor signal;
• and
• correcting the plurality of angle positions based on the at least one Fourier component of the harmonic determined for the first sensor signal and the second sensor signal.

A device for calibrating a magnetic angle sensor, the device comprising:

• a first magnetic field sensor configured to generate a first sensor signal in response to a first magnetic field component;
• a second magnetic field sensor configured to generate a second sensor signal in response to a second magnetic field component that is aligned orthogonal to the first magnetic field component;
• and
• a processing circuit configured to:
• measure, for each angle position of a plurality of angle positions within a 360° rotation of a measurement object, the first sensor signal and the second sensor signal,
• wherein, over the plurality of angle positions, the first sensor signal and the second sensor signal are each 360° periodic and representable as a Fourier series with a Fourier component of a fundamental frequency and at least one Fourier component of a harmonic,
• determine the at least one Fourier component of the harmonic for the first sensor signal and the second sensor signal based on a difference between a 360° trajectory of an angle measurement vector defined by the measured first and the second sensor signals and a circular path, and
• correct the plurality of angle positions based on the at least one Fourier component of the harmonic determined for the first sensor signal and second sensor signal.