公开(公告)号：US11525663B2

公开(公告)日：2022-12-13

申请号：US17261031

申请日：2018-07-20

Applicant: FRABA B.V.

Inventor： Michael Loeken ,  Florian Hallermann ,  Hanno Volker

IPC: G01B7/30 ,  G01D5/14 ,  G01D5/20 ,  G01D5/24

Abstract: A rotation angle measurement system for detecting a rotation of a shaft. The rotation angle measurement system includes the shaft which extends in an axial direction, a rotor unit having a sensor magnet, a stationary stator unit having a multi-turn sensor unit which is arranged radially spaced apart from the shaft and which has a Wiegand sensor, and a magnetic shielding arrangement for the Wiegand sensor. The rotor unit is connected to the shaft to rotate therewith and radially surrounds the shaft. The multi-turn sensor unit functionally interacts with the sensor magnet to detect revolutions thereof. The magnetic shielding arrangement is made from a material having a high magnetic permeability. The magnetic shielding arrangement includes shielding elements which are arranged to surround the Wiegand sensor on a radial inside, on a radial outside, on a first axial side, and on a second axial side thereof.

公开(公告)号：US11460322B2

公开(公告)日：2022-10-04

申请号：US17261032

申请日：2019-07-11

Applicant: FRABA B.V.

Inventor： Florian Hallermann ,  Hanno Volker

IPC: G01D5/14

Abstract: A rotation angle measurement system for detecting a shaft rotation. The rotational angle measurement system includes a rotor unit, a stationary stator unit, and a multi-turn sensor unit. The rotor unit is connected to the shaft to rotate therewith. The rotor unit radially surrounds the shaft and has at least one sensor magnet. The multi-turn sensor unit is arranged on the stationary stator unit spaced radially apart from the shaft. The multi-turn sensor unit interacts with the at least one sensor magnet to detect shaft revolutions. The multi-turn sensor unit includes a Wiegand sensor, at least one Hall sensor, an evaluation unit electrically connected to the Wiegand sensor and to the at least one Hall sensor, and a separate sensor unit circuit board which is fastened to the stationary stator unit and on which the Wiegand sensor, the at least one Hall sensor, and the evaluation unit are each arranged.