Adjustment drive of a motor vehicle
AssigneeBrose Fahrzeugteile GmbH & Co. KG
InventorsCarsten Abert, Helmut Sesselmann
Life of this patent
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Abstract
The invention relates to an adjustment drive of a motor vehicle, wherein the adjustment drive includes a drive motor having a motor magnet that generates a magnetic exciter main field and having a motor armature that is rotatably arranged between a plurality of magnet poles of said motor magnet. The adjustment drive also includes a magneto-sensitive sensor positioned in such a way that during a rotation of the motor armature it senses a change in a magnetic flux density of the exciter main field.
Claims13
A method for evaluating a sensor signal that is generated during rotations of a motor armature of a drive motor, wherein the motor armature is configured to permit flow of an armature current therethrough, and the drive motor comprises a motor magnet that generates a magnetic exciter main field, wherein the sensor signal comprises a first signal component that is generated as a result of a change in magnetic flux density of the magnetic exciter main field, and a second signal component that is generated as a result of a transverse field component of an armature transverse field at a sensor position and that is dependent on the absolute value of the armature current, the method comprising
- filtering out the second signal component from the sensor signal in order to determine the current motor torque of the drive motor, and
- assigning each rotation of the motor armature a number of signal pulses that corresponds to a number of armature teeth.
An adjustment drive of a motor vehicle, the adjustment drive comprising a drive motor comprising
- a motor magnet that generates a magnetic exciter main field,
- a motor armature that is rotatably arranged between the magnet poles of the motor magnet,
- a device for evaluating a sensor signal that is generated during rotations of a motor armature of the drive motor, the device comprising a magneto-sensitive sensor that corresponds to the drive motor and that is configured to detect a change in magnetic flux density, a change in the magnetic resistance, and/or a change in induction,
- wherein, when the armature current flows through the motor armature, the signal that is generated by the sensor contains a first signal component that is generated as a result of a change in magnetic flux density of the magnetic exciter main field, and a second signal component generated as a result of a transverse field component of an armature transverse field at a sensor position and that is dependent on the absolute value of the armature current.
Dependencies are inferred from the claim text.