Mitsui High-Tec Incorporated

Mei Arazoe

Yusuke Hasuo

Akira Nagai

Go Kato

Kiyohisa Maki

A method of manufacturing a laminated rotor core, includes a first process of placing segment dummy plates between an iron core and a die, each of each segment dummy plates covering one or more of plural magnet insertion portions and including a resin injection hole communicating to the one or more of the magnet insertion portions; a second process of injecting a resin from resin reservoir parts formed in any one of an upper die and a lower die holding the iron core through the resin injection hole of each segment dummy plate to the corresponding one or more of the magnet insertion portions; and a third process of detaching the segment dummy plates together with excess resin after the resin injected to the one or more of the magnet insertion portions is cured.

Method of manufacturing laminated rotor core

A laminated coreimproves material yield and prevents cracks or breakages of core pieces by relaxing stress on connecting portions. A connected core segmentto be the laminated coreincludes: a V-shaped cutoutlocated radially inward from the connecting portion, the cutoutopening in a radially inward direction with an opening angle of 360&#xb0;/n given that n is a number of core segments; a slitlocated radially outward from the connecting portion, the slitdividing adjacent segment yokeslocated radially outward from the connecting portion; a first through-holehaving a circular arc formed in a radially outward end of the cutoutin contact with the connecting portion; and a second through-holehaving a circular arc formed in a radially inward end of the slitin contact with the connecting portion

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Kitakyushu, Japan

Mei Arazoe