Magnetic Rotational Angle Transducer
AssigneeContinental Automotive GmbH
InventorMatthias Wagner
Life of this patent
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Abstract
A magnetic rotational angle transducer has at least one Hall sensor (14) rotatable in a magnetic field of a given configuration relative to and offset from the rotational axis (16). To enable linearization of the output signal without additional signal processing over a large range of rotational angles, it is proposed that the Hall sensor is aligned radially and axially to the rotational axis (16) and lies in a central position parallel to the field lines of the magnetic field, wherein the magnetic field is created by at least one permanent magnet (18) in circular segment form around the rotation axis and the Hall sensor (14) is offset from the rotational axis (16) towards the permanent magnet (18) in circular segment form.
Claims20
A magnetic rotational angle transducer, comprising:
- at least one Hall sensor which can rotate around a rotational axis, wherein the Hall sensor is arranged offset with respect to the rotational axis,
- at least one circular segment-shaped permanent magnet arranged around the rotational axis for forming a magnetic field with a specific configuration,
- wherein the two main directions of the at least one Hall sensor are located radially and axially with respect to the rotational axis and in a central position parallel to the field lines of the magnetic field in this central position, and
- wherein the Hall sensor is arranged offset from the rotational axis toward the circular segment-shaped permanent magnet.
A method of using magnetic rotational angle transducer comprising:
- at least one Hall sensor which can rotate around a rotational axis, wherein the Hall sensor is arranged offset with respect to the rotational axis,
- at least one circular segment-shaped permanent magnet arranged around the rotational axis for forming a magnetic field with a specific configuration,
- wherein two main directions of the at least one Hall sensor are located radially and axially with respect to the rotational axis and in a central position parallel to field lines of the magnetic field in this central position, and
- wherein the Hall sensor is arranged offset from the rotational axis toward the circular segment-shaped permanent magnet, the method comprising the step of determining the angular position of a throttle valve shaft of an internal combustion engine by means of said magnetic rotational angle transducer.
Dependencies are inferred from the claim text.