Hall Effect position sensor with flux limiter and magnetic dispe

Details Hall Effect position sensor with flux limiter and magnetic dispe Hall Effect position sensor with flux limiter and magnetic dispe

1992-10-14

1994-06-14

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324174, 32420712, G01B 730, G01B 714, G01P 3488

Patent

active

053213556

ABSTRACT:
A low cost Hall effect position sensor is disclosed which includes a Hall effect integrated circuit disposed in close proximity to a metallic target device. The Hall device is mounted in a slotted flux dispersion pole piece. The slotted magnetic flux dispersion pole piece is designed to disperse a highly concentrated magnetic flux field from a magnet, typically an Alnico or rare earth magnet, into a low intensity magnetic flux field which is compatible with the Hall effect device as well as constant and evenly dispersed across the face of the slotted pole piece. The slotted pole piece is designed so that the magnetic flux differential in an air gap between the dispersion pole piece and a ferrous target is increased when compared to the magnetic flux differential of a non-recessed dispersion pole piece.

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