US 11,791,694 B2
Stator for an electric motor and cooling thereof
Yoshitoshi Sakurai, Kanagawa (JP); Ian Foley, Norfolk (GB); Martin Ogilvie, Norfolk (GB); Rob Williamson, Norfolk (GB); and Michio Kawamoto, Tokyo (JP)
Assigned to Equipmake Ltd, Norfolk (GB); and aim CO., Ltd., Nagoya (JP)
Filed by Equipmake Ltd, Norfolk (GB); and aim CO., LTD., Nagoya (JP)
Filed on Oct. 1, 2020, as Appl. No. 17/60,472.
Application 17/060,472 is a continuation of application No. 14/905,402, abandoned, previously published as PCT/GB2014/052159, filed on Jul. 15, 2014.
Claims priority of application No. 1312678 (GB), filed on Jul. 16, 2013.
Prior Publication US 2021/0021176 A1, Jan. 21, 2021
Int. Cl. H02K 5/20 (2006.01); H02K 9/197 (2006.01); H02K 9/06 (2006.01); H02K 5/128 (2006.01); H02K 9/04 (2006.01); H02K 1/32 (2006.01); H02K 1/274 (2022.01); H02K 3/24 (2006.01); H02K 1/276 (2022.01)
CPC H02K 9/197 (2013.01) [H02K 1/274 (2013.01); H02K 1/32 (2013.01); H02K 3/24 (2013.01); H02K 5/128 (2013.01); H02K 5/203 (2021.01); H02K 5/207 (2021.01); H02K 9/04 (2013.01); H02K 9/06 (2013.01); H02K 1/2773 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A stator for an electric motor, the stator comprising:
a plurality of stator coils;
a support for holding the coils around a rotor rotatable about a central axis of the motor;
a cylindrical sleeve mounted radially inwardly of the support to form a barrier in use between cooling fluid passing over the coils and the rotor located within the stator; and
a housing which extends around the support and has an outer cylindrical surface, wherein a fluid path is defined between the support and the housing for receiving cooling fluid, the fluid path including a plurality of channel sections which extend in a substantially axial direction between an outer cylindrical surface of the support and the housing over the length of the support,
wherein both the support and the housing define each of a set of holes located at an interface between the support and the housing for receiving axially extending rods that couple the support to the housing, wherein the set of holes locates the rods in the assembled motor between adjacent axially extending channel sections of the fluid path such that the set of holes and the axially extending channel sections overlap each other in the circumferential direction, and wherein the set of holes is located radially inwardly of the outer cylindrical surface of the housing.