US 12,217,908 B2
Permanent magnet for use in an electric machine with one or more grooves
Kurt Weber, Hochfelden (CH)
Assigned to BOMATEC MANAGEMENT AG, Hori (CH)
Appl. No. 17/790,576
Filed by BOMATEC MANAGEMENT AG, Hori (CH)
PCT Filed Jan. 7, 2020, PCT No. PCT/EP2020/050194
§ 371(c)(1), (2) Date Jul. 1, 2022,
PCT Pub. No. WO2021/139877, PCT Pub. Date Jul. 15, 2021.
Prior Publication US 2023/0042082 A1, Feb. 9, 2023
Int. Cl. H01F 7/02 (2006.01); H02K 1/02 (2006.01)
CPC H01F 7/021 (2013.01) [H02K 1/02 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A one-piece permanent magnet for use in an electric machine, the one-piece permanent magnet comprising a groove having a depth d which is equal to a thickness of the permanent magnet, wherein the groove has a meandering course with a subsection having a form of a letter S or a letter Z, and
wherein the meandering course comprises a series of regular meanders and wherein the subsection having the form of the letter S or the letter Z is part of a single meander of the series.