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Title:
PERMANENT MAGNET TYPE ROTOR AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2005312153
Kind Code:
A
Abstract:

To improve the productivity of a permanent magnet type rotor used for a rotary electric machine such as an electric motor, etc.

The permanent magnet type rotor includes a plurality of split cores obtained by laminating a plurality of plate-like core pieces so that the spit cores are annularly arranged around a shaft 10 and permanent magnet pieces 40 are accommodated in the magnet accommodation holes 25A, 25B of each spilt core. Radial direction sizes of the magnet accommodation holes 25A, 25B are larger than the radial direction size of the permanent magnet piece 40. The split core is obtained by duplicating parts of the magnet accommodation holes 25A, 25B and laminating the first core piece 22A and the second core piece 22B deviated at positions in the radial direction of the magnet accommodation holes 25A, 25B. The permanent magnet piece 40 is accommodated in duplicated parts of the magnet accommodation holes 25A, 25B sandwiched between a first core piece group 26A and a second core piece group 26B, a fixing member accommodation hole 24 is formed in each split core. A coupling arm 13 for stopping relative movements of the first and the second core pieces 22A, 22B and a spacer 31 are inserted in the entire length of the fixing member accommodation hole 24 in the fixing member accommodation hole 24.


Inventors:
OSAKI KOJIRO
Application Number:
JP2004124279A
Publication Date:
November 04, 2005
Filing Date:
April 20, 2004
Export Citation:
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Assignee:
HONDA MOTOR CO LTD
International Classes:
H02K1/22; H02K1/27; H02K1/28; H02K15/03; (IPC1-7): H02K1/27; H02K1/22; H02K1/28; H02K15/03
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama