公开(公告)号：US10700568B2

公开(公告)日：2020-06-30

申请号：US15671628

申请日：2017-08-08

Applicant: General Electric Company

Inventor： Jeffrey S. Sullivan ,  Christopher Calebrese ,  Qin Chen

IPC: H02K3/34 ,  H02K3/40 ,  H02K3/50 ,  H02K15/10 ,  H02K3/38 ,  B33Y80/00 ,  H02K5/04 ,  H02K5/02

Abstract: An electrical machine includes a stator assembly having an annular core and a conductive winding. The annular core includes a central bore. The conductive winding includes one or more stator winding bars disposed circumferentially around the central bore. The one or more stator winding bars include a core conductor and an insulation layer surrounding the core conductor. An end segment of the one or more stator winding bars at a connection interface includes a stress control structure surrounding the insulation layer. The stress control structure includes a printed scaffold and a dielectric backfill material. The dielectric backfill material fills pores of the printed scaffold. The porous scaffold is composed of a stress control material that is different from the dielectric backfill material.