Hitachi, Ltd.

Hitachi-johnson Controls Air Conditioning, Inc.

Yusuke Asaumi

Ryoichi Kajiwara

Shigehisa Motowaki

Akeshi Takahashi

Akihiro Ishikawa

In a permanent magnet electric motor, a plurality of projections are formed at least partially along an axial direction in the magnet insertion openings, the projection positioning both edges of the permanent magnet in the circumferential direction so that vacant spaces are defined at each sides of the permanent magnet in the circumferential direction; a plurality of slits arranged along the circumferential direction are provided in regions, the region being positioned radially outward from the permanent magnet and being sandwiched at the edges of the permanent magnet in the circumferential direction by the projections; and the shortest distance between the slit and the magnet insertion opening is set to be greater than the shortest distance between the slit and an outer circumferential surface of the rotor core.

Permanent magnet electric motor having slits and projections to minimize irreversible demagnetization

Provided are a metal-resin composite having excellent adhesive strength, a method for producing the same, a busbar, a module case, and a resinous connector part. The metal-resin composite comprises a metallic memberincluding a metal with a high melting point of 500&#xb0; C. or more, a resin memberbeing integrated with the metallic member; and an alloy layerincluding a metal with a low melting point lower than 500&#xb0; C. The alloy layeris arranged between the metallic memberand the resin member, and has average surface roughness thereof in the range from 5 nm or more to less than 1 &#x3bc;m at the interface between the alloy layerand the resin member. Herein, a period of the unevenness formed on the interface of the alloy layeris in the range from 5 nm or more to less than 1 &#x3bc;m.

Metal-resin composite, method for producing the same, busbar, module case, and resinous connector part

An object of the present invention is to provide a composition of a sintering Ag paste which can metallically bond to a nonprecious metal member with high strength as well as to a precious metal member, in a sintering Ag paste which metallically bonds to a metal at a low temperature, and to provide a bonding method to obtain a joint part having high strength. The sintering Ag paste is a material containing a solution of an organic silver complex that is easily decomposed by heat regardless of an atmosphere. Furthermore, the bonding method includes: metallizing a face of a nonprecious metal with Ag in a non-oxidizing atmosphere in a step prior to sintering Ag particles; and then sintering the Ag particles in an oxidizing atmosphere.

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Hitachi, Japan

Yusuke Asaumi