A coil component includes a body, a support portion disposed in the body, a coil portion disposed on a first surface of the support portion, a lead portion disposed on a second surface of the support portion facing the first surface of the support portion and connected to the coil portion, and a via penetrating through the support portion to connect an inner end portion of the coil portion and an inner end portion of the lead portion to each other, wherein the coil portion includes a first conductive layer embedded in the support portion and having a first surface exposed to or facing the first surface of the support portion, a second conductive layer disposed on the first surface of the first conductive layer, and a third conductive layer disposed on the second conductive layer and protruding from the first surface of the support portion.

Problem to be Solved

An adhesive agent is accurately applied on an adhesive agent applying surface.

Solution

Provided are guiding members (100) that guide the conveyance of a sheet steel strip (F) along an intermittent conveyance direction of the sheet steel strip (F) and limit the upward movement of the sheet steel strip (F), and an adhesive agent applying apparatus (50) that applies an adhesive agent to an adhesive agent applying surface at a section corresponding to an iron core lamina (A, W).

A device for performing a method for producing a lamination pack, wherein in the method laminations are cut from an electric strip or sheet; the laminations are placed on top of each other to form a lamination stack; the laminations are connected by material fusion to each other by: locally plasticizing a material of the laminations in an edge region of the laminations by generating friction heat by a tool; mixing the locally plasticized material, at least of the laminations neighboring each other, with the tool; and allowing the plasticized material to cool and fuse the laminations in the edge region to form the lamination pack. The device has a punch press and/or a receptacle for one or a plurality of lamination stacks. The device further has a welding tool that is rotatably driven about an axis of the welding tool and moveable transverse to the axis of rotation.

An adhesively-laminated core includes: a plurality of electrical steel sheets which are stacked on each other and of which both surfaces are coated with an insulation coating; and an adhesion part which is provided between the electrical steel sheets adjacent to each other in a stacking direction and adheres the electrical steel sheets to each other, wherein an adhesive forming the adhesion part contains an organic resin and an inorganic filler, wherein a 50% particle size of the inorganic filler is 0.2 to 3.5 μm, wherein a 90% particle size of the inorganic filler is 10.0 μm or less, and wherein an amount of the inorganic filler is 5 to 50 parts by mass with respect to 100 parts by mass of the organic resin.

A reactor includes a bobbin around which a coil is wound, and a core extending through the bobbin. The bobbin has a tubular shape. The core has a quadrangular prism shape. The core includes a distal end surface and a pair of side surfaces perpendicular to the distal end surface. The side surfaces are opposite surfaces of the core. The bobbin includes projections respectively provided on inner surfaces of the bobbin. The inner surfaces of the bobbin respectively face the side surfaces of the core. The projections extend in an axial direction of a tubular portion of the bobbin. The projections are in contact with the core.

Provided is a laminated iron core in which joining failure between adjacent steel sheets thereof is less likely to occur, even if a distance between the adjacent steel sheets (thickness of an adhesive layer) is reduced. 1. The laminated iron core comprises a plurality of steel sheets laminated together while an adhesive layer is interposed between any adjacent two of the steel sheets, wherein the adhesive layer is comprised of a thermosetting resin composition containing an epoxy resin, an amino triazine novolac-based phenolic resin, an acrylic acid ester-based polymer, and inorganic particles having an average particle size of 10 nm to 100 nm, and a maximum particle size of 1 μm or less, and wherein: the content in volume percentage of the inorganic particles in the adhesive layer is from 5 vol % to 30 vol %; the adhesive layer having a Young's modulus of 2 GPa to 6 GPa as measured at 25° C. by a nanoindentation technique; and a distance between the adjacent steel sheets being from 0.5 μm to 5 μm.

A grain-oriented electrical steel sheet includes: a steel sheet and optionally an insulation coating formed on the steel sheet, in which, in a case where a heat treatment of performing retention at 800° C. for 2 hours is performed, regarding a time-magnetostriction waveform (t−λ waveform) when magnetized to 1.7 T, a peak value of a difference waveform obtained by subtracting the time-magnetostriction waveform after the heat treatment from the time-magnetostriction waveform before the heat treatment is 0.01×10.sup.−6 or more and 0.20×10.sup.−6 or less, and a difference obtained by subtracting an iron, loss before the heat treatment from an iron loss after the heat treatment is 0.03 W/kg or more and 0.17 W/kg or less.

Provided is a wound core formed by laminating a plurality of bent bodies obtained by forming a coated grain-oriented electrical steel sheet in which a coating is formed on at least one surface of a grain-oriented electrical steel sheet so that the coating is on an outside, in a sheet thickness direction, in which the bent body has a bent region obtained by bending the coated grain-oriented electrical steel sheet and a flat region adjacent to the bent region, the number of deformation twins present in the bent region in a side view is five or less per 1 mm of a length of a center line in the sheet thickness direction in the bent region, and when a region extending 40 times a sheet thickness to both sides in a circumferential direction from a center of the bent region on an outer circumferential surface of the bent body is defined as a strain affected region, a proportion of an area where the coating is not damaged at any position along the circumferential direction in a flat region within the strain affected region is 90% or more.

Sheet or strip of cold-rolled and annealed ferrous alloy (1), characterized in that its composition is, in weight percentages: traces≤Co≤40%; if Co≥35%, traces≤Si≤1.0%; if traces≤Co<35%, traces≤Si≤3.5%; if traces≤Co<35%, Si+0.6% Al≤4.5−0.1% Co; traces≤Cr<10%; traces≤V+W+Mo+Ni≤4%; traces≤Mn≤4%; traces Al≤3%; traces≤S≤0.005%; traces≤P≤0.007%; traces≤Ni≤3%; traces≤Cu≤0.5%; traces≤Nb≤0.1%; traces≤Zr≤0.1%; traces≤Ti≤0.2%; traces≤N≤0.01%; traces≤Ca≤0.01%; traces≤Mg≤0.01%; traces≤Ta≤0.01%; traces≤B≤0.005%; traces≤O≤0.01%; the remainder being iron and impurities resulting from the preparation, in that, for an induction of 1.8 T, the maximum difference (Max Δλ) between the magnetostriction deformation amplitudes λ, measured parallel to the magnetic field (Ha) applied (λ/H) and perpendicular to the magnetic field (Ha) applied (λ.sup.⊥H) on three rectangular samples (2, 3, 4) of the said sheet or strip whose long sides are respectively parallel to the direction of rolling (DL) of the said sheet or strip, parallel to the transverse direction (DT) of the said sheet or strip, and parallel to the direction forming an angle of 45° with the said rolling direction (DL) and the said transverse direction (DT), being at most 25 ppm, and in that its recrystallization rate is 80 to 100%. Method of manufacturing such a sheet or strip, transformer magnetic core made from it and a transformer comprising it.

A method for connecting lamination parts to form lamination stacks. In order to ensure a versatile applicability of the lamination stacks, it is proposed that first cut-outs are stamped out identically in the first sub-region and in a second sub-region of the electric strip, additional second cut-outs are stamped into the second sub-region in accordance with the number of spacers, which second cut-outs are embodied to accommodate the spacers, and a second lamination part stamped out from the second sub-region is stacked either before or after the first lamination part in such a way that when spacers of the first lamination part are resting against this second lamination part, the second cut-outs are positioned offset from these spacers.