Magnetic-field-based angle sensor system with stray field compensation and method for stray field compensation

A method, comprising:

• determining, by a magnetic-field-based angle sensor system using a first magnetic field sensor operating in a saturation operation, a rotation angle of a rotor component around an axis perpendicular to a surface of a stator component based on a magnetic field of a multipole magnet, wherein the rotor component is rotatable relative to the stator component and comprises the multipole magnet;
• ascertaining, by the magnetic-field-based angle sensor system using a second magnetic field sensor operating in a linear operation, an external magnetic stray field acting on the magnetic-field-based angle sensor system;
• performing, by the magnetic-field-based angle sensor system, an autocalibration of output signals of the second magnetic field sensor to ascertain stray-field-dependent compensation parameters corresponding to the external magnetic stray field;
• and
• compensating, by the magnetic-field-based angle sensor system, for a stray-field-dependent measurement deviation in the determination of the rotation angle based on the stray-field-dependent compensation parameters.

A non-transitory computer-readable medium comprising a computer program having a program code for causing a programmable hardware device to:

• determine, using a first magnetic field sensor operating in a saturation operation, a rotation angle of a rotor component around an axis perpendicular to a surface of a stator component based on a magnetic field of a multipole magnet, wherein the rotor component is rotatable relative to the stator component and comprises the multipole magnet;
• ascertain, using a second magnetic field sensor operating in a linear operation, an external magnetic stray field acting on the programmable hardware device;
• perform an autocalibration of output signals of the second magnetic field sensor to ascertain stray-field-dependent compensation parameters corresponding to the external magnetic stray field;
• and
• compensate for a stray-field-dependent measurement deviation in the determination of the rotation angle based on the stray-field-dependent compensation parameters.