Drive unit for an adjustment system of a motor vehicle, and method for operating a drive unit
AssigneeRobert Bosch GmbH
InventorsDieter Depner, Stefan Gerstl
Life of this patent
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Abstract
A drive unit for an adjustment system for a motor vehicle has an adjustable element moved by an electric motor. The dive motor is operated electromagnetically. A magnetic field sensor is arranged on a pole pot or a housing of the drive motor to provide an electrical sensor signal dependent on a magnetic field. A control unit is configured to detect the magnetic field. The magnetic field varies on rotation of a rotor of the drive motor, so that a relative position change of the adjustable element can be derived from the electrical sensor signal.
Claims17
A drive unit for an adjustment system configured to be coupled to an adjustable element, the drive unit comprising:
- an electromagnetically operated drive motor,
- a magnetic field sensor arranged on a housing of the drive motor that provides an electrical sensor signal dependent on a magnetic field generated by the drive motor and that varies on rotation of a rotor of the drive motor, and
- a control unit configured to receive the electrical sensor signal and derive a relative position change of the adjustable element from the electrical sensor signal,
- wherein the drive motor has stator magnets arranged on an inside of the housing, and wherein the magnetic field sensor is arranged on a region of the housing which is defined by a space between two adjacent stator magnets.
A drive unit for an adjustment system configured to be coupled to an adjustable element, comprising:
- an electromagnetically operated drive motor including stator magnets,
- a magnetic field sensor arranged on a pole pot of the drive motor that provides an electrical sensor signal dependent on a magnetic field generated by the drive motor and that varies on a rotation of a rotor of the drive motor, and
- a control unit configured to receive the electrical sensor signal and derive relative position change of the adjustable element from the electrical sensor signal,
- wherein the stator magnets produce a magnetic field whose magnetic field lines run from a first stator magnet of the stator magnets through the rotor to a second stator magnet of the stator magnets that is radially opposite of the first stator magnet, and wherein the stator magnets include, in total, two or four or six stator magnets.
Dependencies are inferred from the claim text.