Other

Yuuji Enomoto

Masashi Kitamura

Toshimi Abukawa

Yuji Takagai

Takashi Ando

Yasuaki Motegi

A core has an annular inner core portion, a rib-shaped core portion extending radially from the annular inner core portion and an outer peripheral core portion. Magnetic pole tooth portions are formed in an annular shape on the outer periphery of the rib-shaped core portion, and the core is composed of a plurality of core blocks having the same shapes as blocks formed by dividing the core in circumferential direction. Each of the plurality of core blocks has a concave/convex engage portion at an inner peripheral portion corresponding to the inner periphery of the annular inner core portion, and the plurality of core blocks gathered so as to form the core are fastened each other by a cylindrical housing having an outer surface formed in concave/convex shape, inserted in the inner peripheral portion so as to engage with each other at the concave/convex engage portions, and changed in diameter relative to the core blocks due to thermal shrinkage or expansion of the cylindrical housing, so that the core blocks are tightly fitted to each other without any gap between adjacent core blocks.

Core, rotating machine using the core and production method thereof

In an electric motor comprising a rotor, a stator, a stator core that constitutes the stator, a core section that constitutes the stator core, a plurality of split core blocks which constitute the core section, and a metallic connection housing that connects the split core blocks in dovetailed form to create one connected core section, the split core blocks are each formed of a laminated steel plate, in that the connection housing is formed of a material softer than the laminated steel plate, and the dovetailed connections at the connection housing are plastically deformed to remove the connection gap existing at each of the dovetailed connections.

Growing community of inventors

Hitachi, Japan

Yuuji Enomoto