公开(公告)号：US20170163135A1

公开(公告)日：2017-06-08

申请号：US15357647

申请日：2016-11-21

Applicant: ROLLS-ROYCE plc

Inventor： James EMBERTON ,  Alexis LAMBOURNE ,  John J A CULLEN

IPC: H02K17/16 ,  H02K15/09 ,  H02K3/48 ,  H02K15/02 ,  H02K1/26 ,  H02K3/32

CPC classification number: H02K17/165 ,  B23K20/122 ,  H02K1/265 ,  H02K3/32 ,  H02K3/48 ,  H02K15/0012 ,  H02K15/024 ,  H02K15/09

Abstract: A method of manufacturing an induction motor rotor assembly, the method includes the steps of: providing a rotor; machining a plurality of re-entrant slots axially along an outer surface of the rotor; positioning a sleeve concentrically over the outer surface of the rotor; applying a friction stir welding process to the sleeve along each re-entrant slot axially along the outer surface of the rotor to cause the sleeve material to plasticise and flow into the axial re-entrant slot to form an axial re-entrant slot bar; and providing an electrical connection at each of the opposing axial ends of the rotor between respective ones of opposing ends of each of the axial re-entrant slot bars to thereby form the induction motor rotor.