Rotary position sensor with improved bearing tolerance

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

1994-03-04

1998-08-25

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

123617, 32420722, 32420725, G01B 730, F02P 500, G01D 514

Patent

active

057986398

ABSTRACT:
A rotary position sensor having a dual magnet structure interconnected by a pole piece forming a varying dimension air gap. The magnets, the pole piece and the air gap between the magnets define a closed magnetic circuit. A Hall effect sensor is fixedly mounted in the air gap and is exposed to a well defined but varying magnetic field coupled between the magnets. Through the use of specific magnetic materials and sloping, curved surfaces, a precise yet tolerance friendly magnetic circuit is produced so that the sensor produces signals as a function of the angular positions of the magnets.

REFERENCES:
patent: 3112464 (1963-11-01), Ratajski et al.
patent: 4392375 (1983-07-01), Eguchi et al.
patent: 4570118 (1986-02-01), Tomczak et al.
patent: 4703261 (1987-10-01), Berchtold
patent: 5159268 (1992-10-01), Wu
patent: 5164668 (1992-11-01), Alfors
patent: 5191284 (1993-03-01), Moretti et al.

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