Sensing of a rotational angle
AssigneeInfineon Technologies AG
InventorUdo Ausserlechner
Life of this patent
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Abstract
A rotation angle sensing device is suggested, said device including: a magnetic field source that is mechanically coupled to a rotatable shaft; at least one conductive target that is mechanically coupled to the rotatable shaft; a magnetic angle sensor that is configured to detect the magnetic field of the magnetic field source; and at least one coil that is configured to excite an eddy current in the at least one conductive target and to receive a signal induced by the eddy current. Also, a corresponding method is provided.
Claims29
A rotation angle sensing device, comprising:
- a magnetic field source that is mechanically coupled to a rotatable shaft;
- at least one conductive target that is mechanically coupled to the rotatable shaft;
- a magnetic angle sensor that is configured to detect a magnetic field of the magnetic field source;
- and
- at least one coil that is configured to excite an eddy current in the at least one conductive target and to receive a signal induced by the eddy current,
- wherein the at least one conductive target is arranged on a surface of the magnetic field source.
A method for sensing a rotational angle of a shaft that is arranged rotatably around a rotation axis, wherein a magnetic field source is mechanically coupled to the shaft, and wherein at least one conductive target is arranged on a surface of the magnetic field source, the method comprising:
- detecting, by a magnetic angle sensor, a magnetic field of the magnetic field source;
- exciting, via at least one coil, a current in the at least one conductive target arranged on the surface of the magnetic field source;
- and
- receiving, by the at least one coil, a signal induced by the current.
Dependencies are inferred from the claim text.