US 12,231,026 B2
Stator for a rotating electrical machine
Zhanhui Feng, Peterborough (GB); Qiang Wu, Peterborough (GB); and Xiaoyan Shen, Peterborough (GB)
Assigned to CUMMINS GENERATOR TECHNOLOGIES LTD, Peterborough (GB)
Appl. No. 17/774,022
Filed by Cummins Generator Technologies Limited, Peterborough (GB)
PCT Filed Nov. 4, 2020, PCT No. PCT/GB2020/052790
§ 371(c)(1), (2) Date May 3, 2022,
PCT Pub. No. WO2021/090001, PCT Pub. Date May 14, 2021.
Claims priority of application No. 1916070 (GB), filed on Nov. 5, 2019.
Prior Publication US 2023/0028465 A1, Jan. 26, 2023
Int. Cl. H02K 1/20 (2006.01); H02K 9/16 (2006.01); H02K 9/22 (2006.01)
CPC H02K 9/227 (2021.01) 18 Claims
OG exemplary drawing
 
1. A stator of a rotating electrical machine, the stator comprising a stack of stator laminations forming a stator core, wherein:
a lamination comprises a plurality of cooling fins arranged in at least one group of at least two fins;
the cooling fins in a group are connected by a peripheral connecting member;
the laminations are arranged in packs of at least one lamination;
a group of fins in one pack of laminations lies circumferentially between two adjacent groups of fins in an adjacent pack of laminations;
a cooling fin in one pack of laminations is interposed between two cooling fins in a group of cooling fins in another pack of laminations;
at least some of the packs of laminations comprise a plurality of groups of cooling fins;
at least one group of fins has a different number of fins from another group of fins in the same lamination; and
a group of fins with a lower number of fins in one pack of laminations has all of its fins interposed between fins in a group of fins with a higher number of fins in another pack of laminations.