US 11,677,297 B2
Electrical machines
Tadashi Sawata, Coventry (GB); Andrew E. Page, Tring (GB); Zeyuan Xu, Glasgow (GB); David Gerada, Beeston (GB); Dmitry Golovanov, Nottingham (GB); and Christopher Gerada, Nottingham (GB)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jan. 18, 2021, as Appl. No. 17/151,370.
Claims priority of application No. 20275011 (EP), filed on Jan. 20, 2020.
Prior Publication US 2021/0226513 A1, Jul. 22, 2021
Int. Cl. H02K 9/22 (2006.01); H02K 1/14 (2006.01); H02K 5/20 (2006.01)
CPC H02K 9/227 (2021.01) [H02K 1/146 (2013.01); H02K 5/203 (2021.01)] 16 Claims
OG exemplary drawing
 
1. A stator assembly for an electrical machine comprising a stator, a plurality of inserts and a heat sink, wherein the stator comprises:
an annular core extending around an axis (X) and comprising a plurality of axially extending slots; and
a plurality of sets of electrical windings arranged within the slots and having axial end portions arranged at axial ends of the core;
wherein the inserts comprise ceramic plates which are arranged in respective slots in the gaps (G) between adjacent respective electrical windings in the slots, wherein the inserts extend axially from the respective slots for engagement with the heat sink;
wherein the heat sink comprises at least one cooling plate arranged axially adjacent to the windings, a flat axially facing surface of the at least one cooling plate axially abutting at least one axially facing surface of the inserts, the at least one cooling plate being a separate component to the inserts.