US 12,451,767 B2
External rotor device having integrated sensor system, and use
Michael Kisch, St. Georgen (DE); Jens Löffler, Villingen-Schwenningen (DE); and Marcus Hellmann, Unterkirnach (DE)
Assigned to ebm-papst St. Georgen GmbH & Co. KG, St. Georgen (DE)
Appl. No. 17/641,934
Filed by ebm-papst St. Georgen GmbH & Co. KG, St. Georgen (DE)
PCT Filed Sep. 11, 2020, PCT No. PCT/EP2020/075466
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/048348, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 20 2019 105 035.7 (DE), filed on Sep. 12, 2019.
Prior Publication US 2022/0360147 A1, Nov. 10, 2022
Int. Cl. H02K 11/215 (2016.01); H02K 1/2791 (2022.01)
CPC H02K 11/215 (2016.01) [H02K 1/2791 (2022.01)] 18 Claims
OG exemplary drawing
 
1. An external rotor device having a rotor housing adapted to receive at least one rotor and having at least one sensor magnet provided on the rotor housing, the at least one sensor magnet being arranged in sensory correlation with and in a predefined relative position relative to the at least one rotor,
wherein the external rotor device has at least one ring which is integrally formed on the rotor housing, wherein the at least one ring has at least one pocket, which is set up to receive the at least one sensor magnet, the at least one sensor magnet being arranged in the at least one pocket, and the at least one ring being arranged in a predefined relative position relative to the at least one rotor on or in the rotor housing in such a way in that the relative position of the at least one sensor magnet relative to the at least one rotor in at least one spatial direction is predefined by a materially interlocking formation, at least with regard to a radial direction and also with regard to a circumferential direction and/or an axial direction, the at least one ring and the rotor housing having geometrically corresponding circumferential surfaces, by means of which a fully circumferential materially interlocking interface is provided which has a maximum degree of mold separation of 0.1,
wherein the at least one ring has an inner circumferential surface by means of which the at least one ring is integrally formed on an outer circumferential surface of the rotor housing with all of the inner circumferential surface of the at least one ring in contact with the outer circumferential surface of the rotor housing, and
wherein the at least one ring and the rotor housing have the geometrically corresponding circumferential surfaces, by means of which a fully circumferentially materially interlocking interface is provided.