A reactor that includes a coil having a wound portion; a magnetic core; a holding member provided at both ends of the wound portion; a mold resin by which the coil and the holding member are integrated into one piece; a casing that houses an assembly that includes the coil, the magnetic core, and the holding member; and a potting resin that fills up the casing to seal at least a part of the assembly.

A method for producing an inductive charging device may include inserting a ferrite and a coil, wound from a braid, into a mould; and encasing the ferrite and the braid at least partially with a plastic in a low pressure casting method, a pressing transfer moulding method, or an injection moulding method.

An object of the present invention is to provide a composition that can form a magnetic particle-containing film having excellent magnetic permeability and excellent acid resistance, and has excellent sedimentation stability. Another object of the present invention is to provide a magnetic particle-containing film that relates to the composition, and an electronic component that includes the magnetic particle-containing film.

The composition according to an embodiment of the present invention contains magnetic particles that contain 70% to 90% by mass of Fe atoms and have a crystal structure of Fe, an average particle diameter of 2 to 30 μm, and an aspect ratio less than 8, and a rheology control agent.

Antenna having a housing (3), a core (1) and a coil (2), which is wound around the core (1), the core (1) with the coil (2) in a potting compound (5) being mounted in the housing (3), the potting compound (5) being softer than 40 Shore A.

To prevent a core from being damaged. A method for manufacturing a reactor includes a step of assembling a core that is configured of a core center part and a pair of core leg parts extending outwardly from the core center part to a coil in such a way that the core center part is inserted into a hollow part of the coil and the coil is sandwiched between the core center part and the pair of the core leg parts; and a step of performing resin molding by disposing the coil and the core that are assembled inside a mold and pouring resin into the mold from a gate provided on the mold to the side which is closer to the coil than the core legs parts are while having an outer surface of each of the core leg parts supported by a support part provided on the mold.

A reactor includes a coil having gaps between adjacent turns of a winding, a core inserted through the coil, and a heat-dissipating material that is in contact with a side face of the coil. The heat-dissipating material is inserted between the adjacent turns of the winding of the coil, and the thickness of the heat-dissipating material outside the coil in a direction of an axis of the coil is smaller than the thickness of the heat-dissipating material between the adjacent turns of the winding. By reducing the thickness of the heat-dissipating material outside the coil where contribution to coil cooling is small, the amount of the heat-dissipating material can be reduced without lowering the cooling performance to the coil.

This application provides a dry-type transformer and a winding method thereof. The dry-type transformer includes a magnetic core, a first coil, a second coil, and a shielding component. The first coil is disposed around the exterior of the magnetic core, and the second coil is disposed around the exterior of the first coil. In a direction from the iron core to the second coil, the shielding component includes a first conducting layer, a second conducting layer, a third conducting layer, and a fourth conducting layer that are sequentially disposed at intervals, the first coil is disposed between the magnetic core and the first conducting layer, and the second coil is disposed between the second conducting layer and the third conducting layer.

A manufacturing method of a reactor includes: a coil mold step of forming a coil mold in which a first resin is molded to cover at least part of a coil; and a main body mold step of forming a main body mold in which a second resin is molded to cover at least part of an assembly body in which the coil, the coil mold, two I-cores, and an O-core surrounding the coil and the coil mold are assembled. In the coil mold step, a gap plate configured to fill a gap between positions where the two I-cores are placed is formed by molding with the first resin. In the main body mold step, gap plates each configured to fill a gap between the O-core and a corresponding one of the I-cores are formed by molding with the second resin.

An ignition coil includes a not-illustrated coil, a plate assembly, and a case assembly. The plate assembly and the case assembly are combined with each other by laser welding at a recess and a rib (projection) which are respective abutting portions, thereby forming storage spaces for storing the coil.

A dust core includes a compact containing a soft magnetic powder and also includes a cover coat for the compact. The cover coat contains a polyamideimide-modified epoxy resin. An electric/electronic component includes the dust core, a coil, and a connection terminal connected to each end portion of the coil. At least one portion of the dust core is placed so as to be located in an induced magnetic field generated by the current flowing in the coil through the connection terminal. An electric/electronic device includes the electric/electronic component.