公开(公告)号：US09985491B2

公开(公告)日：2018-05-29

申请号：US15108952

申请日：2014-12-03

Applicant: Hitachi, Ltd.

Inventor： Yuichiro Tanaka ,  Koichi Watanabe ,  Satoshi Kikuchi ,  Akihito Nakahara ,  Kenta Deguchi

IPC: H02K21/12 ,  H02K3/28 ,  H02K21/24 ,  H02K3/12 ,  H02K1/18 ,  H02K1/27 ,  H02K3/48

CPC classification number: H02K3/28 ,  H02K1/182 ,  H02K1/2793 ,  H02K3/12 ,  H02K3/48 ,  H02K21/24 ,  H02K2213/03

Abstract: Stator coils each consist of a plurality of rectangular conductor coil pieces, the adjacent connection ends of which are connected to each other on the outer diameter side of a stator. The coil pieces each have: a folded portion folded in a rotation axis direction on the inner diameter side of the stator; inner diameter-side open leg portions opened from both sides of the folded portion toward the circumferential directions of the rotation axis; linear portions each bent from each of the inner diameter-side open leg portions and disposed so as to pass through the stator from the inner diameter side to the outer diameter side; and an outer diameter-side open leg portions opened from the linear portions toward the circumferential directions of the rotation axis and extending to the connection ends. The inner diameter-side open leg portions extending to the folded portion have a correction portion for correcting the position of the rectangular conductor and are formed so as to align the connection end extending to the correction portion with the connection end of the adjacent coil piece.

公开(公告)号：US09810743B2

公开(公告)日：2017-11-07

申请号：US14707245

申请日：2015-05-08

Applicant: Hitachi, Ltd.

Inventor： Kohji Maki ,  Shinya Yuda ,  Hiroaki Kojima ,  Satoshi Kikuchi ,  Hisashi Endo

IPC: G01R31/14 ,  G01R31/00 ,  G01R31/34 ,  G01M13/04 ,  G01R31/12 ,  G01R31/02

CPC classification number: G01R31/343 ,  G01M13/04 ,  G01R31/025 ,  G01R31/12 ,  G01R31/34

Abstract: Provided is a deterioration diagnosis system which diagnoses deterioration of an N-phase rotational machine (N denotes a natural number). The deterioration diagnosis system includes a first current sensor to be attached individually to at least lead wires of (N-1)-phases in a rotational machine, the first current sensor being able to detect a current amplitude arising from a plurality of deterioration causes, and a second current sensor to be attached collectively to the lead wires of all phases in the rotational machine, the second current sensor being able to detect a current amplitude arising from a plurality of deterioration causes.