US 12,323,007 B2
Electric motor and method for operating an electric motor
Maurice Andree, Neukirchen-Vluyn (DE); Stefan Tiller, Sankt Augustin (DE); and Hong Giang To, Düsseldorf (DE)
Assigned to GKN Powder Metallurgy Engineering GmbH, Bonn (DE)
Appl. No. 18/009,438
Filed by GKN Powder Metallurgy Engineering GmbH, Bonn (DE)
PCT Filed Jun. 9, 2021, PCT No. PCT/EP2021/065492
§ 371(c)(1), (2) Date Dec. 9, 2022,
PCT Pub. No. WO2021/250108, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 10 2020 115 263.9 (DE), filed on Jun. 9, 2020.
Prior Publication US 2023/0223828 A1, Jul. 13, 2023
Int. Cl. H02K 1/2795 (2022.01); H02K 9/06 (2006.01); H02K 16/02 (2006.01)
CPC H02K 1/2795 (2022.01) [H02K 9/06 (2013.01); H02K 16/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electric motor comprising a stator which extends in an axial direction between a first front side and a second front side and has, at the first front side, an annular yoke and, starting from the yoke, a plurality of cores which each extend in the axial direction over a first length as far as the second front side and are arranged next to one another in a circumferential direction, wherein a coil, which, starting from the yoke, extends in the axial direction over a second length to the second front side, is arranged at each core, wherein the second length is smaller than the first length such that a section of each core extends in the axial direction beyond the respective coil, wherein the motor additionally comprises at least a first rotor which is arranged at least on the second front side in the axial direction between the coils and the second front side, wherein, when the motor is operating, the first rotor uses a first component oriented in a radial direction of the magnetic flux generated by the stator in order to drive it; wherein, when the motor is operating, a drive force acting between the stator and the first rotor is generated in a region of the first rotor which is arranged in the radial direction at least inside or outside the cores and wherein the electric motor at least comprises the first rotor and a second rotor, wherein the region of one rotor is arranged outside the cores in the radial direction and the region of the other rotor is arranged inside the cores in the radial direction.