A toroidal magnetic element. A plurality of coils is arranged in a toroidal configuration. Each coil may be a hollow cylinder, formed by winding a rectangular wire into a roll. The coils alternate with spacers, each of which may be a wedge. The coils may alternate in winding orientation, and the inner end of each coil may be connected, through an S-Bend to the inner end of an adjacent coil. Small gaps are formed between the coils and the wedges, e.g. as a result of each wedge having, on its two faces, a plurality of raised ribs, against which the coils abut. Cooling fluid flows through the gaps to cool the coils.

The present invention relates to a transformer and, more specifically, to a transformer including a secondary coil part which comprises stacked conductive plates. A transformer according to an embodiment of the present invention may comprise: a core part having a middle leg and outer legs; a secondary coil part including multiple conductive plates vertically stacked to form coil turns around the middle leg; and a primary coil part including conductive wires wound to form coil turns around the respective outer legs.

An electrical transformer and method of manufacturing an electrical transformer. The electrical transformer comprises a set of primary windings comprising first and second primary windings connected in parallel and first and second sets of secondary windings. Each of the first and second sets comprises a plurality of secondary windings that are connected in parallel. The secondary windings of the first set are electrically isolated from the secondary windings of the second set. The set of primary windings and the first and second sets of secondary windings are arranged in a stacked structure in which the secondary windings of the first set are interleaved with the secondary windings of the second set, and at least one secondary winding of the first set and/or at least one secondary winding of the second set is arranged between the first and second primary windings.

A method for manufacturing a wireless charging device is disclosed. The method includes: providing a substrate, a first metal plate, and a second metal plate; forming a plurality of circles of slots, each of the circles of slots including at least one first slot and at least one second slot, the at least one first slot having a first depth, and the at least one second slot having a second depth; forming a first coil and a second coil by performing a metal forming process on the first metal plate and the second metal plate; and placing the first coil in the at least one first slot, and placing the second coil in the at least one second slot. In the method, the first coil and the second coil have good fixity and are easily to be assembled.

A coil component includes a non-conductive bobbin and a coil that winds around the bobbin. The coil includes first and second coil members with joining portions in which joining holes are formed. The bobbin includes first and second bobbin members. The first bobbin member includes: first and second positioning portions that position the first and second coil members, respectively, when the first and second coil members are moved onto the first bobbin member; and a support that supports lower portions of the first and second joining portions. The second bobbin member includes a first insulator disposed between the first and second coil members. The first and second coil members and the second bobbin member are attached to the first bobbin member by being moved in a single direction without a further step of rotating.

Disclosed herein are microelectronic assemblies including microelectronic components that are coupled together by direct bonding, as well as related structures and techniques. For example, in some embodiments, a microelectronic assembly may include a first microelectronic component and a second microelectronic component coupled to the first microelectronic component by a direct bonding region, wherein the direct bonding region includes at least part of an inductor.

A magnetic device includes a housing, a bobbin, at least one coil, and a first magnetic core and a second magnetic core. The housing has at least one side plate and a bottom plate. The side plate stands on the bottom plate and forms a space with the bottom plate. The bobbin is at least partially located in the space. The bobbin has a cylinder. The at least one coil is wound around the cylinder. Each of the first and second magnetic cores includes a center column, a side column, a connecting portion, and a metal clip. The center column is located in the cylinder. The side column is located outside the coil and away from the bottom plate, such that the coil is located between the side column and the bottom plate. The connecting portion connects the center column and the side column.

The disclosure relates to an integral inductor arrangement with at least three magnetic loops arranged side by side to each other in a row and at least one winding associated with each of the magnetic loops. The magnetic loops are formed by individual core elements, each of which being part of one of the magnetic loops, and shared core elements, each of which being part of two adjacent of the magnetic loops. The shared core elements are separated from the individual core elements by magnetic gaps and each of the at least one winding is arranged around one of the individual core elements. The disclosure further relates to a use of such integral inductor arrangement within a 3-phase AC-filter for a power inverter for feeding electrical power into a power grid.

An electric wire for improving the adhesion force between the adjacent winding wires of a coil is described. The electric wire of the present invention may include a conductive wire with a substantially quadrilateral cross-sectional shape. The electric wire further includes a first groove and a second groove positioned diagonally at two opposite corners of the quadrilateral along a longitudinal direction of the conductive wire. An adhesive pocket filled with an adhesive is sized to fit within each of the first and second grooves at diagonally arranged opposite corners.

An inductor includes an annular core, and a first coil and a second coil which are wound around the core. The core has an internal surface, an external surface, a first end surface, and a second end surface. The first coil and the second coil include a first coil piece having a length of one turn and a second coil piece having a length of one turn. The first coil piece and the second coil piece surround the internal surface, the first end surface, the external surface, and the second end surface of the core. The first coil piece has, at its tip, a joint portion to be joined to the second coil piece, and the second coil piece has, at its tip, a joint surface to be in contact with the joint portion. Thus, the resistance value of the coil is reduced.