US 11,984,837 B2
Method for determining an angular position of a rotating component, in particular of an electric motor for a clutch actuation system of a vehicle
Jie Zhou, Baden-Baden (DE); Wai-Wai Buchet, Strassburg (FR); and Paul Walden, Freiburg im Breisgau (DE)
Assigned to SCHAEFFLER TECHNOLOGIES AG & CO. KG, Herzogenaurach (DE)
Appl. No. 16/614,049
Filed by SCHAEFFLER TECHNOLOGIES AG & CO. KG, Herzogenaurach (DE)
PCT Filed May 8, 2018, PCT No. PCT/DE2018/100432
§ 371(c)(1), (2) Date Nov. 15, 2019,
PCT Pub. No. WO2018/219388, PCT Pub. Date Dec. 16, 2018.
Claims priority of application No. 102017111895.0 (DE), filed on May 31, 2017.
Prior Publication US 2021/0159822 A1, May 27, 2021
Int. Cl. H02P 6/16 (2016.01); F16D 28/00 (2006.01); G01B 7/30 (2006.01); G01D 5/14 (2006.01); G01D 5/244 (2006.01); H02K 7/06 (2006.01); H02K 29/08 (2006.01)
CPC H02P 6/16 (2013.01) [F16D 28/00 (2013.01); G01B 7/30 (2013.01); G01D 5/145 (2013.01); G01D 5/24471 (2013.01); G01D 5/24476 (2013.01); H02K 29/08 (2013.01); F16D 2300/18 (2013.01); F16D 2500/1025 (2013.01); F16D 2500/3021 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for determining an actual angular position of a rotating component for a clutch actuation system of a vehicle, in which a measured angular position of the rotating component is obtained from a sensor arrangement that is radially spaced apart from a rotation axis of the rotating component, wherein a magnetic ring that is fixed to and concentrically disposed on the rotating component builds up a magnetic field that changes with respect to the sensor arrangement and is detected by the sensor arrangement, wherein a signal obtained from the sensor arrangement is evaluated with respect to the measured angular position, wherein the signal obtained from the sensor arrangement is evaluated with respect to amplitude information of the magnetic field, wherein the amplitude information includes an amplitude of a tangential magnetic field direction, which is represented by a Lissajous ellipse, and an amplitude of a radial magnetic field direction, which is represented by a Lissajous circle, of a magnetic flux, wherein a correction parameter is determined from a ratio of a major axis of the Lissajous ellipse and a major axis of the Lissajous circle, wherein the correction parameter is determined after assembly of the sensor arrangement and is initialized prior to determining the actual angular position, wherein an angular error is determined from the correction parameter and the measured angular position, wherein the actual angular position is determined based on a difference between the measured angular position and the angular error.