公开(公告)号：EP1220424A4

公开(公告)日：2002-11-27

申请号：EP99940649

申请日：1999-09-03

申请人： HITACHI LTD

发明人： IDE KAZUMASA ,  HATTORI KENICHI ,  KOMURA AKIYOSHI ,  YAMASHINA MITSUNORI ,  SONOBE TADASHI ,  SENBA AKITOMI ,  SATO JUNJI ,  SHIOBARA RYOICHI

IPC分类号： H02K9/04 ,  H02K9/06 ,  H02K9/08 ,  H02K9/18 ,  H02K9/10

CPC分类号： H02K9/12

摘要： A dynamo-electric machine which can make uniform an axial temperature rise distribution in the machine by supplying a cooled coolant to the axial center, which is remotest from the axial opposite ends of a core, of the core, and which comprises a plurality of circumferentially continuous air passages (18) disposed between a stator frame (1) and a stator core (2) and coolers (28) disposed correspondingly to the air passages (18), wherein a coolant increased in pressure by a pressure increasing device is cooled by the coolers (28) and allowed to flow to the axial center of the stator core (2) via air passages (15) communicating with the axial center of the stator core (2) in a direction from the outer circumferential side toward the inner circumferential side of the stator core (2).