A coil component includes a body including a first surface and a plurality of side surfaces respectively connected to the first surface, a substrate disposed in the body, a coil portion disposed in the body, a lead-out portion disposed in the body and connected to the coil portion, and a dummy portion spaced apart from the lead-out portion. The body includes four corners, at each of which two adjacent side surfaces of the first to fourth side surfaces are in contact with each other, and the dummy portion includes first to fourth dummy patterns respectively disposed outside the coil portion and extending toward the four corners of the body.

Provided are claims and disclosure for a toroidal coil apparatus comprising a coiled wire nest further comprising: a top end layer disposed with a center through-layer; a circumferential side wall; a bottom end layer disposed with a center through-layer any one of a top end layer or bottom end layer radially extending through the circumferential side wall to form a vertically stacked coiled wire nest with a center through-nest, wherein the wire length and configuration of each stacked layer is identical and the distance between adjacent coiled wire is identical; at least a single or a plurality of inputs of at least two counter-directional channels in electrical communication with the coiled wire nest and at least a single or plurality of outputs of at least two counter-directional channels; and a coiled wire nest frame, further comprising: a latitudinal center hub with a plurality of slots; a vertical disc with a plurality of slots with staggered teeth; wherein the said vertical disc with staggered teeth is inserted into each slot of the said latitudinal center hub; the said staggered teeth are configured to shape a coiled wire nest with at least two stacked layers of wire with a crossed winding pattern, wherein the wire length and configuration of each stacked layer is identical and the distance between adjacent coiled wire is identical; and a vacuous center in communication with the center through layer of the top end layer and bottom end layer to shape the center through-nest of the coiled wire nest.

An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.

A transformer includes: a first winding; a second winding provided to maintain a first distance to the first winding; and a shell that seals the first winding and the second winding.

In a multilayer coil component, a multilayer body includes a plurality of insulator layers and a through-hole. The through-hole penetrates in a third positive direction. A first coil extends inside the multilayer body while surrounding an outer circumference of the through-hole. A magnetic resin is filled into the through-hole. An overlying adhesive resin layer is laminated on a first surface of the multilayer body. An upper magnetic substrate is adhered to the multilayer body with the overlying adhesive resin layer interposed therebetween. The overlying adhesive resin layer includes an accommodation space. The accommodation space is connected to the through-hole. When the multilayer coil component is seen in the third positive direction, an outer edge of the accommodation space is located on an outer side of an outer edge of the through-hole. A portion of the magnetic resin is located inside the accommodation space.

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 stationary induction electrical apparatus includes a disc winding having a structure in which a flow path for a cooling medium is provided between coils where a low voltage is generated between shield wires, an L-shaped insulation barrier is provided between coils where a high voltage is generated between the shield wires, a horizontal portion of the L-shaped insulation barrier is provided so as to closely contact an upper surface or a lower surface of the disc coil, a tip end portion in an axial direction of the L-shaped insulation barrier is provided so as to closely contact an inner surface of the disc coil which is adjacent to a pressboard insulation cylinder, and a height of the tip end portion in the axial direction is lower than a thickness of one coil.

The invention relates to a printed circuit board having a layer structure, which accommodates a plurality of electric circuits. The electric circuits are separated from each other by an insulating barrier layer having a minimum thickness (Di) and a minimum distance (D0) between conductive components of the electric circuits.

A transformer includes a magnetic core, a first coil unit and a second coil unit. The first coil unit is disposed within the magnetic core and includes a laminated board having layers laminated therein and conductive patterns. Respective ones of the conductive patterns are disposed on the laminated layers. The second coil unit includes a conductive wire spaced apart from the conductive patterns of the laminated board by an insulating distance. The conductive wire includes a triple-insulated wire surrounded by three sheets of insulating paper to maintain the insulating distance from the conductive patterns.

A coil structure of open ventilated type stereoscopic wound-core dry-type transformer, comprising wire disks formed by wound wires and fixing parts. The fixing parts are provided with clamping grooves for fixing the wire disks. The wire disks are fixed and wound around the fixing parts to form the coil structure. The outer layers of the wires are coated with insulating paper with insulating paint. And by insulating paint, wires are adhered mutually and wire disks adhere to fixing parts, which combine into an integral structure. The coil structure does not require another paint impregnation process, so the process is simplified. And by the insulating paint on the insulating paper, wires are adhered mutually and wire disks adhere to fixing parts, so the structure is stable and firm and ensures the electrical equipment meets the requirements of electric performance, mechanical property and insulating property.