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US 2006/0038557 A1Published application
Magnetic rotational position sensor
AssigneeWabash Technologies, Inc.
InventorGary Johnson
Life of this patent
Estimating the term…
Abstract
A magnetic rotational position sensor including first and second magnets spaced apart to define an air gap and cooperating with one another to generate a magnetic field within the air gap extending along an axis of rotation. At least one magnetic flux sensor is positioned within the magnetic field and is operable to sense varying magnitudes of magnetic flux in response to relative rotational movement between the magnetic field and the magnetic flux sensor about the axis of rotation.
Claims30
A magnetic rotational position sensor, comprising:
- first and second magnets spaced apart to define an air gap and cooperating with one another to generate a magnetic field extending across said air gap and positioned along an axis of rotation;
- a first magnetic flux sensor defining a first sensing plane extending along a first sensor axis, said first sensor axis arranged substantially parallel with and offset from said axis of rotation, said first magnetic flux sensor positioned within said magnetic field and operable to sense varying magnitudes of magnetic flux in response to relative rotational movement between said magnetic field and said first magnetic flux sensor about said axis of rotation;
- and
- a second magnetic flux sensor defining a second sensing plane extending along a second sensor axis, said second sensor axis arranged substantially parallel with and offset from said axis of rotation, said second magnetic flux sensor positioned within said magnetic field and operable to sense varying magnitudes of magnetic flux in response to relative rotational movement between said magnetic field and said second magnetic flux sensor about said axis of rotation.
1 more element
A magnetic rotational position sensor, comprising:
- first and second magnets spaced apart to define an air gap;
- a first shaped pole piece positioned adjacent a first pole surface of said first magnet;
- and
- a second shaped pole piece positioned adjacent a second pole surface of said second magnet, said first and second shaped pole pieces facing one another across said air gap and cooperating with said first and second magnets to generate a magnetic field extending across said air gap and positioned along an axis of rotation;
- and
- at least one magnetic flux sensor positioned within said magnetic field and operable to sense varying magnitudes of magnetic flux in response to relative rotational movement between said magnetic field and said at least one magnetic flux sensor about said axis of rotation.
3 more elements
A magnetic rotational position sensor, comprising:
- a loop pole piece having a peripheral outer wall defining an inner region, said loop pole piece having a first overall dimension along a first axis and a second overall dimension along a second axis arranged substantially perpendicular to said first axis, said first overall dimension being greater than said second overall dimension to provide said loop pole piece with an oblong configuration;
- first and second magnets positioned within said inner region of said loop pole piece adjacent said peripheral outer wall and spaced apart to define an air gap, said first and second magnets cooperating with said loop pole piece to generate a magnetic field extending across said air gap and positioned along an axis of rotation;
- and
- at least one magnetic flux sensor positioned within said magnetic field and operable to sense varying magnitudes of magnetic flux in response to relative rotational movement between said magnetic field and said at least one magnetic flux sensor about said axis of rotation.
1 more element
Dependencies are inferred from the claim text.