Abstract: An object of the present invention is to provide a wheel drive device capable of suppressing a temperature increase in an electric motor and a power conversion device and suppressing occurrence of a failure of an electric component. Provided are: an electric motor having a stator 60 and a rotor 40; a stator holder 80 that holds the stator 60; a power conversion device 100 that converts power supplied to the electric motor; and a wheel which accommodates the electric motor, the stator holder 80, and the power conversion device 100 on the inner peripheral side. The stator holder 80 includes a flow path 90 through which a cooling medium flows. The flow path 90 is arranged between the stator 60 and the power conversion device 100.

Abstract: A laser oscillator unit includes an amplification unit configured to amplify laser light and emit amplified laser light from an emitting portion; a case covering the amplification unit; and an outer support mechanism and an inner support mechanism provided on the case. The case is formed with a window portion. An outer movable leg allows the case to slide in a radial direction around an outer fixed leg. An inner movable leg allows the amplification unit to slide in the radial direction around an inner fixed leg. A straight line passing through a center of the outer fixed leg and a center of the inner fixed leg intersects with a straight line passing through the emitting portion and the window, and a laser optical axis emitted from the emitting portion and a laser optical axis emitted from the window portion coincide with each other.

Abstract: A laser oscillator unit includes an amplification unit configured to amplify laser light and emit amplified laser light from an emitting portion; a case covering the amplification unit; and an outer support mechanism and an inner support mechanism provided on the case. The case is formed with a window portion. An outer movable leg allows the case to slide in a radial direction around an outer fixed leg. An inner movable leg allows the amplification unit to slide in the radial direction around an inner fixed leg. A straight line passing through a center of the outer fixed leg and a center of the inner fixed leg intersects with a straight line passing through the emitting portion and the window, and a laser optical axis emitted from the emitting portion and a laser optical axis emitted from the window portion coincide with each other.

Abstract: A laser processing machine includes: a laser oscillator which emits laser light; a scanning unit which scans a processing target surface of a work by deflecting the laser light emitted from the laser oscillator; and a focusing unit which is disposed between the laser oscillator and the scanning unit and which focuses the laser light emitted from the laser oscillator. The focusing unit is set so as to focus the laser light at a second position that is more distant from a first position where the laser light is incident vertically than a third position that is farthest from the first position in the processing target surface of the work.

Abstract: A laser processing machine includes: a laser oscillator which emits laser light; a scanning unit which scans a processing target surface of a work by deflecting the laser light emitted from the laser oscillator; and a focusing unit which is disposed between the laser oscillator and the scanning unit and which focuses the laser light emitted from the laser oscillator. The focusing unit is set so as to focus the laser light at a second position that is more distant from a first position where the laser light is incident vertically than a third position that is farthest from the first position in the processing target surface of the work.

Abstract: Provided are a multi-phase transformer having an easier-producible structure, and a transformation system wherein a plurality of such transformers are serially connected. Disclosed is a three-phase transformer (Tra) provided with three coils (1u, 1v, 1w) and a pair of magnetic members (21, 22) respectively provided on opposite ends in the axial direction of the coils (1u, 1v, 1w), wherein the coils (1u, 1v, 1w) are respectively provided with first and second sub-coils (11u, 12u; 11v, 12v; 11w, 12w).

Abstract: Provided are a multi-phase transformer having an easier-producible structure, and a transformation system wherein a plurality of such transformers are serially connected. Disclosed is a three-phase transformer (Tra) provided with three coils (1u, 1v, 1w) and a pair of magnetic members (21, 22) respectively provided on opposite ends in the axial direction of the coils (1u, 1v, 1w), wherein the coils (1u, 1v, 1w) are respectively provided with first and second sub-coils (11u, 12u; 11v, 12v; 11w, 12w).

Abstract: Disclosed is a composite wound element (Tra) which is used in a transformer or a transformation system, and used as a composite wound element for a noise-cut filter, wherein a plurality of coils (1) are enclosed in a magnetic connection member (2a), and are configured by winding belt-like conductive members (11, 12, 13) so that the width direction of the conductive members (11, 12, 13) corresponds to the axial direction of the coils (1). The transformer, the transformation system, and the composite wound element for a noise-cut filter are provided with the composite wound element having the aforementioned structure. Thus, the composite wound element (Tra), the transformer, the transformation system, and the composite wound element for a noise-cut filter can be produced more easily than ever before.

Abstract: A precursor for manufacturing a Nb3Sn superconducting wire according to the present invention includes a mono-element wire including a Sn or Sn-based alloy core disposed at the, a Cu or Cu-based alloy matrix and a plurality of Nb or Nb-based alloy filaments surrounding the Sn or Sn-based alloy core, and a diffusion barrier layer and a stabilizing copper layer surrounding the Cu or Cu-based alloy matrix. In a final shape after a reduction process, the average diameter of the Nb or Nb-based alloy filaments is set to 5 ?m to 30 ?m, and the average distance between the Sn or Sn-based alloy core and the Nb or Nb-based alloy filaments nearest the Sn or Sn-based alloy core is set to 100 ?m or less.

Abstract: It is an object to provide a Nb-based rod material which is used for producing a Nb3Sn superconducting wire material and in which satisfactory workability in Nb or a Nb-based alloy can be achieved, and a method of producing a superconducting wire material which can exhibit satisfactory superconducting characteristics using the Nb-based rod material. The Nb-based rod material is produced by a step of casting a raw material of this rod material using a casting mold having a circular or substantially circular cross-sectional shape, and a step of forming a columnar or substantially columnar rod material by hot-working or cold-working the resulting product obtained by the casting with a working apparatus whose cross-sectional shape is a circular or substantially circular shape.

Abstract: A method for manufacturing a powder-metallurgy processed Nb3Sn superconducting wire is provided. In the method, a sheath made of Nb or a Nb alloy is filled with a raw material powder containing Sn. The sheath filled with the raw material powder is subjected to diameter reduction to form a wire. The wire is heat-treated to form a superconducting phase at the internal surface of the sheath. The raw material powder is prepared by adding a Sn powder to a Cu—Sn alloy powder or a Cu—Sn intermetallic compound powder, and is compacted under isotropic pressure.

Abstract: An internal diffusion process Nb3Sn superconducting wire is produced by drawing a composite wire including a composite material containing a plurality of Nb or Nb based alloy cores embedded in a Cu or Cu based alloy matrix and a Sn or Sn based alloy core disposed in the center portion, a diffusion barrier layer composed of Nb or Ta and disposed on the outer perimeter of the composite material, and stabilizing Cu disposed on the outside of the diffusion barrier layer and heat-treating the resulting composite wire so as to diffuse Sn and react Sn with the Nb or Nb based alloy cores, wherein the area percentage of the stabilizing Cu in a cross section in a direction perpendicular to the axis center of the composite wire is 10% to 35% and the area percentage of the diffusion barrier layer is 10% to 25%.

Abstract: There is provided a Nb3Sn superconducting wire having excellent superconducting properties, the wire being produced by a powder process, and a precursor of the Nb3Sn superconducting wire produced by a powder process, the precursor being capable of increasing the efficiency of the formation reaction of Nb3Sn even in a relatively low practical temperature range of about 600° C. to about 750° C. The precursor of the present invention is a precursor of a Nb3Sn superconducting wire produced by a powder process including filling a sheath containing at least Nb with a material powder containing at least Sn, subjecting the resulting sheath filled with the powder to diameter reduction to form a wire, and subjecting the resulting wire to heat treatment to form a superconducting layer at the interface between the sheath and the powder. The material powder contains a Cu component. The sheath has a structure in which a Nb or Nb-based-alloy portion is combined with a Cu or Cu-based-alloy portion.

Abstract: Disclosed is a manufacturing method of an Nb3Sn superconductive wire using a powder technique, the method including the steps of: filling, as a raw powder, an intermetallic compound powder obtained from a metallic powder containing at least one metallic powder selected from Ta powder and Nb powder, and Sn powder, or a mixture of the metallic powder and the Sn powder into a sheath made of Nb or an Nb based alloy; performing a diameter-reduction process on the sheath to form a wire; heat treating the wire; and, forming a superconductive layer on the interface between the sheath and the powder, wherein at least one of the metallic powders selected from the Ta powder and the Nb powder is obtained by aggregating fine particles (primary) in shape of coral to form secondary particles.

Abstract: A method for producing an Nb3Sn superconductive wire material using a powder process is provided, in which a powdered raw material is filled in a sheath made of Nb or an Nb-based alloy, and the above sheath is subjected to diameter reduction to form a wire, followed by heat treatment to form a superconducting layer at the interface between the sheath and the filled powder. The above powdered raw material contains powdered Sn, powdered Cu, and a powdered alloy or a powdered intermetallic compound, which is formed from Sn and at least one metal selected from the group consisting of Ti, Zr, Hf, V, and Ta.

Abstract: A method for producing an Nb3Sn superconductive wire material using a powder process is provided, in which a powdered raw material is filled in a sheath made of Nb or an Nb-based alloy, and the above sheath is subjected to diameter reduction to form a wire, followed by heat treatment to form a superconducting layer at the interface between the sheath and the filled powder. The above powdered raw material contains powdered Sn, powdered Cu, and a powdered alloy or a powdered intermetallic compound, which is formed from Sn and at least one metal selected from the group consisting of Ti, Zr, Hf, V, and Ta.

Abstract: A precursor for manufacturing a Nb3Sn superconducting wire according to the present invention includes a mono-element wire including a Sn or Sn-based alloy core disposed at the, a Cu or Cu-based alloy matrix and a plurality of Nb or Nb-based alloy filaments surrounding the Sn or Sn-based alloy core, and a diffusion barrier layer and a stabilizing copper layer surrounding the Cu or Cu-based alloy matrix. In a final shape after a reduction process, the average diameter of the Nb or Nb-based alloy filaments is set to 5 ?m to 30 ?m, and the average distance between the Sn or Sn-based alloy core and the Nb or Nb-based alloy filaments nearest the Sn or Sn-based alloy core is set to 100 ?m or less.

Abstract: Disclosed is a manufacturing method of an Nb3Sn superconductive wire using a powder technique, the method including the steps of: filling, as a raw powder, an intermetallic compound powder obtained from a metallic powder containing at least one metallic powder selected from Ta powder and Nb powder, and Sn powder, or a mixture of the metallic powder and the Sn powder into a sheath made of Nb or an Nb based alloy; performing a diameter-reduction process on the sheath to form a wire; heat treating the wire; and, forming a superconductive layer on the interface between the sheath and the powder, wherein at least one of the metallic powders selected from the Ta powder and the Nb powder is obtained by aggregating fine particles (primary) in shape of coral to form secondary particles.

Abstract: A precursor for manufacturing a Nb3Sn superconducting wire by bronze method, in which plural Nb or Nb-based alloy cores are buried in a Cu—Sn-based alloy base material. The Cu—Sn-based alloy base material comprises Ti and/or Zr in addition to Sn, and these components satisfy the equations (1) and (2) below: 0.4?(X?15.6)/Y?1.9??(1) and 15.6<X?19 ??(2) where the symbol X denotes the content of Sn in mass % and the symbol Y denotes the total content of Ti and Zr in mass %.

Abstract: A bobbin for a superconducting coil includes a cylindrical drum, and a tapered portion extending from each end of the drum. A superconducting wire or a precursor of the superconducting wire shaped like a tape is helically wound around the drum in multiple layers. The tapered portion has a tapered surface that is inclined at an arbitrary angle.