US 11,929,650 B2
Electric machine with more precise measurement
Alberto Rossi, Boulogne-Billancourt (FR); Jérôme Piaton, Boulogne-Billancourt (FR); and Benjamin Daguse, Boulogne-Billancourt (FR)
Assigned to SAFRAN ELECTRONICS & DEFENSE, Boulogne-Billancourt (FR)
Appl. No. 17/286,043
Filed by SAFRAN ELECTRONICS & DEFENSE, Boulogne-Billancourt (FR)
PCT Filed Oct. 23, 2019, PCT No. PCT/FR2019/052536
§ 371(c)(1), (2) Date Apr. 16, 2021,
PCT Pub. No. WO2020/084260, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 1859769 (FR), filed on Oct. 23, 2018.
Prior Publication US 2021/0391773 A1, Dec. 16, 2021
Int. Cl. H02K 11/215 (2016.01); H02K 1/14 (2006.01); H02K 1/278 (2022.01); H02K 11/33 (2016.01); H02K 29/08 (2006.01)
CPC H02K 11/215 (2016.01) [H02K 1/146 (2013.01); H02K 1/278 (2013.01); H02K 11/33 (2016.01); H02K 29/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electrical machine comprising a rotor and a stator, the rotor being movable in rotation relative to the stator around an axis of rotation and including a plurality of permanent magnets or a plurality of electromagnets, the stator including a plurality of windings integral with the stator and able to be supplied by an electrical current so as to drive the rotor in rotation relative to the stator,
the stator comprising a first magnetic sensor comprising a first detection surface and a second magnetic sensor comprising a second detection surface, the first magnetic sensor and the second magnetic sensor being positioned on a same section plane orthogonal to the axis of rotation, the electrical machine comprising a first angular sector along which the first magnetic sensor is positioned and a second angular sector along which the second magnetic sensor is positioned,
the first magnetic sensor being configured to detect a first change of direction of a first normal component of a magnetic field generated by the plurality of permanent magnets or the plurality of electromagnets, the first normal component being orthogonal to the first detection surface,
the second magnetic sensor being configured to detect a second change of direction of a second normal component of the magnetic field generated by the plurality of permanent magnets or the plurality of electromagnets, the second normal component being orthogonal to the second detection surface,
the electrical machine further comprising a metal part that is integral with the stator, the metal part comprising:
a first amplification zone extending in the first angular sector,
a second amplification zone extending in the second angular sector,
a third zone extending from the first amplification zone until the second amplification zone, wherein a radial thickness of the third zone in the section plane is less than a radial thickness of the first amplification zone and is less than a thickness of the second amplification zone in the section plane.