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US 2009/0243402 A1Published application
Position measurement using magnetic fields
AssigneeBose Corporation
InventorsRichard F. O'Day, Dariusz Antoni Bushko
Life of this patent
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Abstract
A position sensing system for positioning a linear motor that includes a stator and an armature having magnets, the armature moving relative to the stator along a path. A sensor determines a position of the armature based on measurements of a magnetic field generated by the magnets of the armature.
Claims25
An apparatus comprising:
- a linear motor comprising a stator and an armature, the armature moving relative to the stator along a path, the armature comprising magnets;
- and
- a sensor to determine a position of the armature based on measurements of a magnetic field generated by the magnets of the armature.
An active suspension system comprising:
- a linear motor comprising a stator and an armature, the armature moving relative to the stator along a path, the armature comprising magnets;
- a sensor to determine a position of the armature based on measurements of a magnetic field generated by the magnets of the armature;
- and
- a controller to control the linear motor based on the position of the armature.
1 more element
A method comprising:
- using a magnetic field from magnets of an armature of a linear motor to move the armature relative to a stator;
- and
- determining a position of the armature based on measurements of the magnetic field generated by the magnets of the armature.
Dependencies are inferred from the claim text.