Motor rotor

Details Motor rotor Motor rotor

2007-04-20

2010-11-16

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156220

Reexamination Certificate

active

07834504

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.

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