Invention Grant
- Patent Title: Motor rotor
- Patent Title (中): 电机转子
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Application No.: US12303070Application Date: 2007-04-20
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Publication No.: US07834504B2Publication Date: 2010-11-16
- Inventor: Yasuyuki Shibui , Masahiro Shimizu
- Applicant: Yasuyuki Shibui , Masahiro Shimizu
- Applicant Address: JP Tokyo
- Assignee: IHI Corporation
- Current Assignee: IHI Corporation
- Current Assignee Address: JP Tokyo
- Agency: Griffin & Szipl, P.C.
- Priority: JP2006-167365 20060616
- International Application: PCT/JP2007/058595 WO 20070420
- International Announcement: WO2007/145023 WO 20071221
- Main IPC: H02K21/12
- IPC: H02K21/12

Abstract:
A motor rotor (22) includes a motor shaft (30), a permanent magnet (319) surrounding the motor shaft (30) around an axis, a pair of end rings (32, 32) surrounding the motor shaft (30) around the axis and sandwiching the permanent magnet (32) from both sides in an axial direction, and a hollow cylindrical outer sleeve (33) fitted to the permanent magnet (31) and a pair of end rings (32) in accordance with a stationary fit. A longitudinal elastic modulus of the end ring (32) is larger than a longitudinal elastic modulus of the permanent magnet (32). A thickness of the outer sleeve (33) is different in correspondence to a position in the axial direction in such a manner as to make uniform a circumferential stress applied to the outer sleeve (33) fitted to the permanent magnet (32) and a pair of end rings (32) in the axial direction.
Public/Granted literature
- US20090195102A1 MOTOR ROTOR Public/Granted day:2009-08-06
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