A coil module includes a coil conductor including a plurality of coil elements and a plurality of wire electrodes disposed on a circuit board, each of the plurality of coil elements including a pair of leg portions and a bridge portion connecting one end portions of the pair of leg portions together, the plurality of coil elements being disposed to cross a winding axis. A method for manufacturing the coil module includes an assembly forming step of integrating the plurality of coil elements with resin to form a coil element assembly, and a conductor forming step of mounting the coil element assembly on the circuit board to complete the coil conductor wound about the winding axis. In the conductor forming step, the resin is introduced into a die set in which the plurality of coil elements are arranged to form a block, to thus form the coil element assembly.

A common mode choke apparatus includes a first bus bar forming a first plurality of loops about a first segment of a ferrite core, the first bus bar having a plurality of first upper surfaces, and a second bus bar forming a second plurality of loops about a second segment of the ferrite core, the second bus bar having a plurality of second upper surfaces.

Provided are a coupled inductor and a power module including the coupled inductor. A coupled inductor includes: a magnetic core, a first winding and a second winding, where a first passage is formed in the magnetic core; a part of the first winding and a part of the second winding pass through the first passage, and the first winding crosses with the second winding outside the first passage. Another coupled inductor includes: a magnetic core, a first winding and a second winding, where the magnetic core has a first passage and a second passage in parallel, both run through the magnetic core from one end face thereof to another opposite end face, where the first winding and the second winding both penetrate the first passage and the second passage, such that differently-named terminals of the windings are located on the same end face of the magnetic core.

An electrical transformer includes a coil pack including windings, and spacers axially spacing turns of the windings from one another and being formed of a thermoplastic material. Sticks couple and position the spacers. The coil pack has high resistivity to creep and permits temperature rise without degradation of transformer insulation, providing for extended service life and unique methods of transformer system upgrade.

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 transformer assembly with shrinkage compensation during drying or curing of the windings including: a core having two yokes and two legs, a winding provided about at least one of the two legs of the core, the winding being insulated by an insulating material, a metal profile per yoke, extending in parallel to the respective yoke and being mounted to it, and two pistons seated in the metal profiles, the pistons being movable along their axial direction which is parallel to the longitudinal axis of the at least one winding, wherein the at least two pistons exert a force on the at least one winding in an axial direction of the windings.

A wire-wound magnetic component includes a magnetic core, a coil set, a bobbin, an insulating wrapper, a caulking member and an ingress-protective finishing film. The magnetic core has at least one leg. The coil set is aligned and interacts with the magnetic core for electromagnetic induction, wherein the coil set includes at least one coil. The bobbin includes: a main body having a hollow portion for accommodating the leg of the magnetic core, and winding therearound a conductive wire to form the coil set, wherein the conductive wire has an unwound free end extending from the coil set; a cover plate disposed at an end of the main body and configured as a flange so as to define a winding space for accommodating the coil set; and an ingress-protective structure disposed in the winding space and separating the coil set from the cover plate.

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.

A coil has multiple coil sections connected to each other and each coil section includes a body portion and at least one direct or protrusive connecting portion disposed at one end of the body portion. Coil sections form at least one spiral path around the central axis of the coil, and on the projection of the coil along the central axis. The protrusive connecting portions protrude out of the path location of the direct connecting portions. Two connected coil sections form only one overlapped surface at the coupled parts of the direct or protrusive connecting portions. Regarding to the body portions in the same spiral path, a first end of one body portion is indirectly connected and disposed adjacent to a second end of another body portion. The second end has one surface with a virtual extension reaching the first end.

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.