Rotary position sensor with improved bearing tolerance

Details Rotary position sensor with improved bearing tolerance Rotary position sensor with improved bearing tolerance

G - Physics

01

B

G01B 7/30 (2006.01) G01D 5/12 (2006.01) G01D 5/14 (2006.01)

Patent

CA 2143919

An angular sensor has a shaped dual magnet structure carried upon a pole piece having a generally "c" shaped cross-section. The magnet and pole piece define a generally circular linear field which is concentric about the axis of rotation of the complete rotor. A Hall effect device is inserted into the open portion or gap between the two magnets and is exposed to a well defined field. Through the use of particular magnet materials and a magnet geometry extending from the axis of rotation to a point well beyond the Hall sensor, a precise and yet tolerant magnetic circuit is produced.

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