Abstract: This invention relates to a position sensor featuring a stator defining an air gap inside of which a mobile magnet integral with a coupling shaft moves. The sensor features a Hall probe for measuring the variation of the induction in an air gap. The stator is formed of a first stationary part and a second part which is either stationary or mobile, the two parts defining between them a main air gap in which the part of the mobile element moves. The mobile element exhibits at least two adjacent thin parts magnetized crosswise in alternate directions, the magnetized parts being made of a material exhibiting in the entire working area a practically linear demagnetization characteristic and reversible permeability close to that of the air. The stationary part exhibits at least two secondary air gaps approximately perpendicular to the main air gap in which the mobile element moves. The Hall probe is housed in one of the secondary air gaps.

Abstract: A magnetic position sensor having a thin tubular-shaped permanent magnet that is integral with a coupling shaft. The permanent magnet is mobile in rotation in a main air gap between two parts made of a soft magnetic material. One of the parts is formed by a stator having a secondary air gap in which a Hall probe is housed. The stator is placed coaxially on the inside of the tubular-shaped permanent magnet, with the other magnetic part including a coaxial tubular yoke with the tubular-shaped permanent magnet and defining, with the stator, a cylindrical main air gap.

Abstract: This invention relates to a position sensor featuring a stator (1) defining an air gap inside of which a mobile magnet (3) integral with a coupling shaft (4) moves. The sensor features a Hall probe (12) for measuring the variation of the induction in an air gap (10). The stator (1) is formed of a first stationary part and a second part (2) which is either stationary or mobile, the two parts defining between them a main air gap (5) in which the part of the mobile element moves. The mobile element exhibits at least two adjacent thin parts magnetized crosswise in alternate direction, the magnetized parts being made of a material exhibiting in the entire working area a practically linear demagnetization characteristic and a reversible permeability close to that of the air. The stationary part exhibits at least two secondary air gaps (10, 11) approximately perpendicular to the main air gap (5) in which the mobile element moves. The Hall probe (12) is housed in one of the secondary air gaps (10, 11).