Improved switched reluctance speed sensor

Details Improved switched reluctance speed sensor Improved switched reluctance speed sensor

G - Physics

01

P

G01P 3/488 (2006.01) G01P 3/44 (2006.01) G01P 3/487 (2006.01)

Patent

CA 2163279

A bearing assembly for a vehicle including a fixed element, a rotating element rotating relative to the fixed element about an axis, and an annular sensor connected to one of the fixed element and the rotating element. The sensor includes a pick-up coil and an annular magnet connected to the pick-up coil. The magnet has a plurality of magnetic regions which alternate in polarity around the magnet. The magnet generates a magnetic flux path magnetically coupling the magnet to the coil and resulting in the generation of an electrical signal in the coil. The rotating bearing element includes a plurality of gear teeth. The gear teeth generate a change in the reluctance of the magnetic flux path to vary the electrical signal in response to the angular speed of the fixed element relative to the rotating element.

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