A magnetic core excellent in productivity, having stable magnetic characteristics, and easy to handle for a coil device including a conductor and is formed by stacking a plurality of soft magnetic thin ribbons divided into small pieces.

A magnetic core and the like having a stable soft magnetic property, including a plurality of soft magnetic layers which are laminated, wherein a crack is formed in the soft magnetic layers. The soft magnetic layers include Fe as a principal component. The soft magnetic layers include a composition formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e+f))M.sub.aB.sub.bP.sub.cSi.sub.dC.sub.eS.sub.f, wherein: X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and O and rare-earth elements, M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, V, and W; and a to f and and are in predetermined ranges. A structure including a nanoheterostructure or an Fe-group nanocrystal is observed in the soft magnetic layers.

A method for manufacturing a thin strip component, including a processing step of processing an amorphous thin strip member into a dimension shape larger than a target shape, and a heat treating step of heat treating and contracting the amorphous thin strip member processed in the processing step to form the amorphous thin strip member into a thin strip component of the target shape. A thin strip component which is a magnetic laminate in which a plurality of plate-shaped thin strip component members of the same shape are laminated, and has a recess over an entire side surface of the magnetic laminate is used. A motor including the thin strip component, a plurality of coils disposed on the thin strip component, and a rotor disposed between the plurality of coils is used.

The invention relates to a device (11) and a method for producing transformer cores (12), the device comprising a retaining system (19) having a stacking table (18) for collecting sheets of metal (16) from which a transformer core (12) is constructed and having at least two positioning aids for the sheets, the stacking table forming a positioning surface (26) for the positioning aids and being equipped with the positioning aids, the stacking table and the positioning aids being realized such that a free positioning and a location-independent fastening of the positioning aids within the positioning surface is possible, the device having a positioning system (25) by means of which the positioning aids can be disposed on and/or be removed from the stacking table.

There is provided a method for producing metal foils, capable of easily crystalizing amorphous soft magnetic material of a plurality of metal foils into nano-crystal magnetic by uniformly heating the metal foils. Separating members (magnets) are disposed on the opposite sides of a laminate, which has been obtained by laminating a plurality of metal foils made of amorphous soft magnetic material, in the laminated direction of the laminate, and the metal foils forming the laminate are magnetized with the magnets. Thus, the adjacent metal foils are separated from each other in the laminated direction and a gap is formed between the metal foils. The metal foils are heated with the gap formed therebetween so that the amorphous soft magnetic material of each metal foil is crystalized into nano-crystal magnetic material.

Provided are a core for a current transformer and a manufacturing method for the same in which high permittivity is formed in order to optimize electric power acquisition efficiency by magnetic induction at a low current. The provided method of manufacturing a core through the steps of winding a metal ribbon, heat treating a core base, impregnating, cutting and polishing, wherein after the core base which is inserted into a mold is heat treated to implement a shape, the core base separated from the mold is heat treated to manufacture the core for the current transformer having high permittivity.

A transformer includes a first iron core group, a second iron core group, and winding portions. The first iron core group includes iron core stacks. The second iron core group includes iron core stacks each disposed to face a corresponding one of the iron core stacks of the first iron core group. Each of the winding portions is wound around its corresponding iron core stack of the first iron core group and its corresponding iron core stack of the second iron core group, the corresponding one iron core stack of the second iron core group facing the corresponding one iron core stack of the first iron core group. The iron core stacks of the first iron core group and the iron core stacks of the second iron core group each include annular iron cores stacked alternately.

A method for producing an electric strip laminate wound into a coil is disclosed, in which at least two metallic electric strips that are electrically insulated from each other are integrally bonded to form an electric strip laminate and in another step, are wound into a coil. In order to ensure a reproducible method, the invention proposes that the electrical strips, which are each electrically insulated on at least one flat side with a baked enamel layer, be joined to each other by means of baked enamel layers facing each other and be integrally bonded to form an electric strip laminate by activating the chemical cross-linking of the two baked enamel layers.

The invention relates to a method and a robot system (23) for producing transformer cores (12), sheets of metal (16) from which a transformer core is constructed being received on at least two stacking tables (18) by means of a multiaxial robot (22) of the robot system, the sheets of metal being supplied to the robot and stacked adjacent to the robot in at least two storage positions (31) for different sheets of metal by means of a conveyor device (29), the robot and the conveyor device being controlled by a control device (17), sheets of metal being collected from the storage positions and being stacked on the stacking tables by means of the robot disposed between and above the stacking tables.

A magnet core for low-frequency applications and method for producing a magnet core for low-frequency applications is provided. The magnet core is made of a spiral-wound, soft-magnetic, nanocrystalline strip. The strip essentially has the alloy composition Fe.sub.RestCo.sub.aCu.sub.bNb.sub.cSi.sub.dB.sub.eC.sub.f, wherein a, b, c, d, e and f are stated in atomic percent and 0a1; 0.7b1.4; 2.5c3.5; 14.5d16.5; 5.5e8 and 0f1, and cobalt may wholly or partially be replaced by nickel. The magnet core has a saturation magnetostriction .sub.s of .sub.s<2 ppm, a starting permeability .sub.1 of .sub.1>100 000 and a maximum permeability .sub.max of .sub.max>400 000. In addition, a sealing metal oxide coating is provided on the surfaces of the strip.