US 11,862,374 B2
Current-compensated inductor, filter, high-voltage on-board electrical system and motor vehicle
Hubert Herrmann, Haimhausen (DE); Christoph Mehrwald, Landshut (DE); and Jan Sousek, Putzbrunn (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 16/968,028
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Aug. 27, 2019, PCT No. PCT/EP2019/072852
§ 371(c)(1), (2) Date Aug. 6, 2020,
PCT Pub. No. WO2020/052971, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 10 2018 215 576.3 (DE), filed on Sep. 13, 2018.
Prior Publication US 2021/0366642 A1, Nov. 25, 2021
Int. Cl. H01F 17/06 (2006.01); B60R 16/023 (2006.01)
CPC H01F 17/06 (2013.01) [B60R 16/023 (2013.01); H01F 2017/065 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A current-compensated inductor for filtering interference signals transmitted between two high-voltage components of a high-voltage on-board power system of a motor vehicle, comprising:
a toroidal magnetic core which surrounds an inner opening; and
at least two busbars for electrically connecting the two high-voltage components, wherein
the two busbars are guided axially through the inner opening in the magnetic core and are arranged spaced apart from one another in the inner opening while forming an airgap,
an inner side, facing the inner opening, of the magnetic core and areas, facing the inner side of the magnetic core, of outer sides of the busbars have shapes which correspond to one another,
the inner side of the magnetic core has at least in certain sections a concave shape,
the areas, facing the concavely shaped inner side of the magnetic core, of the outer sides of the busbars have a convex shape in order to bear over an entire surface on the inner side of the magnetic core, wherein the concavely shaped inner side of the magnetic core and the convexly shaped areas of the outer sides of the busbars have a same radius of curvature,
in order to form the concavely shaped inner side, the magnetic core has an oval-ring-shaped cross section which surrounds the inner opening in an oval fashion and has two circular-arc-shaped sections lying opposite one another and two straight element sections lying opposite one another,
the inductor has three busbars which are arranged spaced apart from one another along the straight element sections, forming two strip-shaped airgaps, and
in order to form the convexly shaped areas of the outer side, the two busbars lying on the outside have circular-segment-shaped cross-sectional areas, and the inner busbar has a rectangular-shaped cross section.