US 12,149,122 B2
Stator for rotary electric machine and associated rotary electric machine
Nicolas Velly, Frouard (FR); Tristan Dontenville, Champigneulles (FR); Christophe Galmiche, Toul (FR); Clement Biri, Champigneulles (FR); Lionel Durantay, Frouard (FR); and Federico Svetti, Champigneulles (FR)
Assigned to GE Energy Power Conversion Tehcnology Limited, Warwickshire (GB)
Filed by GE Energy Power Conversion Technology Limited, Warwickshire (GB)
Filed on Jan. 8, 2021, as Appl. No. 17/144,407.
Claims priority of application No. 20315003 (EP), filed on Jan. 8, 2020.
Prior Publication US 2021/0211000 A1, Jul. 8, 2021
Int. Cl. H02K 1/20 (2006.01); H02K 9/19 (2006.01)
CPC H02K 1/20 (2013.01) [H02K 9/19 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A stator for rotary electric machine comprising a stator frame and a cylindrical magnetic mass inserted in the stator frame, the magnetic mass including a plurality of stacks of compacted magnetic sheets and longitudinal channels uniformly distributed over at least one diameter of the magnetic mass, the channels leading to each side of the magnetic mass, characterized in that at least three bundles of compacted magnetic sheets are separated by spacers forming two discharge pipes extending circumferentially and radially between the stator frame and a central housing of the stator intended to receive a rotor of the rotary electric machine and communicating with the channels, the stator frame comprising at least two discharge openings connected to different discharge pipes such that a fluid injected on either side of the magnetic mass escapes from the stator via the discharge pipes, a fluid passage section of the discharge pipes being configured to modify a temperature distribution in the magnetic mass, wherein the spacers are of different sizes such that the discharge pipes are of different sizes, each discharge opening being substantially equal to or greater than a section of the discharge pipe connected to said discharge opening.