Title:
【発明の名称】永久磁石回転子
Document Type and Number:
Japanese Patent JP3347939
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a permanent-magnet rotor which can prevent a drop in reliability and performance by a method wherein an elastically deformable coupling part is formed in a position facing the edge of every ring-shaped permanent magnet in the outer circumferential part, its inner circumferential part is fixed and bonded to a rotor shaft and its outer circumferential part is fixed and bonded to the edge of the permanent magnet via the coupling part. SOLUTION: One pair of ring-shaped magnet fixation plates 3 are arranged so as to come into contact with the step part 1a of a rotor shaft 1 and with both edges of every permanent magnet 2, and protrusion-shaped coupling parts 3a in which a very small crack is provided so as not to be fractured are formed in positions which face the edge of every permanent magnet 2 in the outer circumferential part. Then, at both magnet fixation plates 3, their inner circumferential parts are fixed and bonded to the edge of the step part 1a by a welding operation, and their outer circumferential parts are fixed and bonded to the edge of every permanent magnet 2 by, e.g. a laser welding operation via the coupling parts 3a. Consequently, since the coupling parts 3a are deformed elastically in the axial direction and the circumferential direction so as to absorb a difference in an expansion and contraction amount, the life of a rotor becomes long, and the reliability of the rotor can be enhanced.
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Inventors:
Yusuke Soma
Yuji Nakahara
Yuji Nakahara
Application Number:
JP14427596A
Publication Date:
November 20, 2002
Filing Date:
June 06, 1996
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02K1/27; (IPC1-7): H02K1/27
Domestic Patent References:
| JP3173329A | ||||
| JP187271Y1 | ||||
| JP4742257Y1 |
Attorney, Agent or Firm:
Masuo Oiwa (3 outside)