Rotary position sensor with improved bearing tolerance

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

1997-11-24

1999-11-09

Strecker, Gerard

Electricity: measuring and testing

Magnetic

Displacement

32420722, 32420725, G01B 730, G01D 514, F02P 707

Patent

active

059821701

ABSTRACT:
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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patent: 5798639 (1998-08-01), McCurley et al.

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