A coil-incorporated multilayer substrate includes base materials and a coil portion including conductor patterns that are wound a plurality of times on at least one of the base materials, and, in a predetermined direction along the surface of the base material of the coil portion, the width of outermost conductor patterns is larger than the widths of the conductor patterns between an innermost conductor pattern and an outermost conductor pattern, the width of the innermost conductor pattern is larger than the widths of the conductor patterns between the outermost conductor pattern and the innermost conductor pattern, and the width of the innermost conductor pattern is larger than the distance between the innermost conductor pattern and the conductor pattern adjacent to the innermost conductor pattern.

The present disclosure provides a transformer module and a power module, wherein the transformer module comprises: a magnetic core, where a first insulating layer and a second wiring layer are sequentially disposed on the magnetic core from inside to outside; a first metal winding, wound around the magnetic core in a foil structure, and comprising a first winding segment formed in the first wiring layer and a second winding segment formed in the second wiring layer; and a second metal winding, wound around the magnetic core in a foil structure, comprising a third winding segment formed in the first wiring layer and a fourth winding segment formed in the second wiring.

The proposed transformer includes windings made of a multi-layer ferromagnetic foil tape having an even number m of ferromagnetic layers, coated by interlayer insulation. The winding's upper ends are connected through a first yoke, the winding's bottom ends are connected through a second yoke. Each winding is wrapped by a short-circuited coil, and contains a component for transposition of layers connected in a break at the middle of tape. The insulation's thickness is determined by a ratio of d.sub.i>u.sub.n2, pic*/(E.sub.n2, pic.Math.m), where u.sub.n2, pic is a maximum peak voltage between adjacent winding turns, E.sub.n2, pic is a maximum electric field strength of the insulation. The insulation uses either ferroelectric material Fe.sub.2O.sub.3, or multi-layered material with an intensive antiferromagnetic interaction formed as a plurality of pairs of alternating layers of Cu—Fe with a ratio of thicknesses of Cu and Fe ranged from 5:1 to 10:1.

A magnetic device having height includes a magnetic core, a first foil winding, and a second foil winding. The magnetic core includes first and second inner posts separated from each other in the height direction by a first inner gap and first and second outer elements separated from each other in the height direction by a first outer gap. The first foil winding is wound around the first inner post without extending along a height of the first inner gap and without extending along a height of the first outer gap. The second foil winding is wound around the second inner post without extending along the height of the first inner gap and without extending along the height of the first outer gap.

An electrically insulated electric conductor strip (1), in particular for electric motors and transformers, having a strip-like electric conductor (2) which has an upper cover surface (2a) and a lower cover surface (2b), two side edge surfaces (2c) and, at each end, an end edge surface, and having electrical insulation (3), which is arranged on at least one cover surface of the strip (2a, 2b). In order to create a conductor strip (1) of this kind which can be produced with reduced effort but has a high electrical insulation effect, the insulation comprises a paint layer (3a) and an adhesive strip (3b), which is adhered to the lower cover surface (2b) and/or the upper cover surface (2a) of the strip-like electrical conductor (2), more specifically at least in a region (4) in each case which borders a side edge surface (2c), the paint layer (3a) being beneath the adhesive tape (3b) and at least directly on the lower cover surface (2b) and/or on the upper surface (2a).

A magnetic core may have one or more notches in a center post, backplate and/or outer rim. Such notches may reduce or eliminate dimensional resonance and/or reduce the amount of magnetic material. A magnetic core with or without notches may omit a backplate and/or an outer rim.

A coil component includes a body having a first surface and a second surface opposing each other and a plurality of wall surfaces connecting the first surface to the second surface, and including insulating resin and magnetic metal powder particles; an insulating substrate disposed in the body; a coil portion disposed on the insulating substrate and including a lead-out pattern exposed to a first wall surface of the plurality of wall surfaces of the body; and an external electrode disposed on the body and connected to the lead-out pattern. Some of the magnetic metal powder particles are exposed to each of the plurality of wall surfaces of the body. The magnetic metal powder particles exposed to the first wall surface of the body have a cut-out surface. The magnetic metal powder particles exposed to a second wall surface connected to the first wall surface of the plurality of wall surfaces of the body do not have a cut-out surface.

A resonant coil structure may include a plurality of conductors, including: a first conductor having a first end and a second end; a second conductor having a third end and a fourth end; a third conductor having a fifth end and a sixth end; and a fourth conductor having a seventh end and an eight end; and at least one galvanic coupling conductor that galvanically couples the first end to the fifth end and galvanically couples the fourth end to the eighth end.

A reactor including a magnetic core and a coil having a wound part, the magnetic core having an inner core part disposed inside the wound part and an outer core part disposed outside the wound part, is provided with a bolt coupling the inner core part and the outer core part, the bolt being constituted by a composite material formed by dispersing a soft magnetic powder in a resin and including a shaft part passing through the outer core part, the shaft part including a tip reaching the inner core part, and the inner core part and the outer core part respectively being an integrated member having an undivided structure.

A coil formed from a flexible polymer substrate that is printed with metal traces is disclosed in which the flexible substrate has notches that align each loop as the substrate is wound into a ring. The notches are precisely spaced so that the diameter of each loop is well controlled. As the substrate is wound, adhesive is applied along its length to fill gaps between each loop's layer. Ideally, the adhesive has a similar dielectric constant as the polymer substrate. The resulting coil has loops of metal traces separated by precise a thickness of dielectric. The precision in spacing between metal layers and dielectric allows the coil to be designed for self-resonance.