公开(公告)号：US10110087B2

公开(公告)日：2018-10-23

申请号：US15128979

申请日：2015-03-24

Applicant: ABB Schweiz AG

Inventor： Joonas Helander ,  Moritz Grün ,  Ari Vartiainen ,  Risto Pulkkinen

IPC: H02K5/24 ,  H02K5/04 ,  H02K1/18 ,  H02K5/26

Abstract: Electric machine comprises a rotor and a stator surrounding the rotor. The stator comprises a cylindrical stator core having a laminated structure and slots for a stator winding and a stator frame surrounding the stator core. The stator core is attached with fastening brackets by means of fastening means based on a compression joint to the stator frame. The stator frame comprises two opposite end constructions and a frame plate located between the end constructions. Back beams extending in the axial direction of the stator are attached to an outer surface of the stator core. Each fastening bracket comprises two perpendicular branches, a first branch attached to the stator frame plate and a second branch attached to the back beam by fastening means based on a compression joint. The fastening means passes through openings in each branch. The openings are allow a small movement of the fastening means in the openings so that the stator core can be centralized in a radial direction and in an axial direction in relation to the stator frame before the fastening means are tightened in order to lock the stator core to the stator frame.