Abstract: The LC combined transformer is a combination of capacitors, inductors and an electrically-isolated mutual inductor, i.e. conventional transformer; which in principle is a unity-coupled mutual capacitor or a cascade connection of an ideal transformer and unity-coupled mutual capacitor(s). To improve the imperfections of widely-used transformers, by employing the simplest passive-circuit design to attain a perfectly-functional match between mutual capacitors and the mutual inductor, this invention achieves optimal features of current or/and voltage transformation, and introduces a new function of waveform conversion from square to quasi-sine. The ideal current transformer herein is suitable for sinusoidal current measurements, the ideal voltage transformer herein suitable for sinusoidal voltage measurements, and they also could be upgraded to ideal transformers for both current and voltage transformations.

Abstract: There is provided a multilayer type inductor, including: an inductor main body; a coil part having conductive circuits and conductive vias formed in the inductor main body; and external electrodes formed on both ends of the inductor main body, wherein in the inductor main body, at least parts around the conductive circuits and the conductive vias are formed of a ferrite material or a non-magnetic material.

Abstract: A variable coupled inductor includes a first core, two conducting wires, a second core and a magnetic structure. The first core includes two first protruding portions, a second protruding portion and two grooves, wherein the second protruding portion is located between the two first protruding portions and each of the grooves is located between one of the first protruding portions and the second protruding portion. Each of the conducting wires is disposed in one of the grooves. The second core is disposed on the first core. A first gap is formed between each of the first protruding portions and the second core and a second gap is formed between the second protruding portion and the second core. The magnetic structure is disposed between the second protruding portion and the second core and distributed symmetrically with respect to a centerline of the second protruding portion.

Abstract: A structure is disclosed, comprising: a first magnetic core portion comprising: a first plurality of leg posts that are to be surrounded by a first set of windings; and a first plurality of center portions that are not to be surrounded by windings; and a second magnetic core portion comprising: a second plurality of leg posts that are to be surrounded by a second set of windings; and a second plurality of center portions that are not to be surrounded by the second set of windings, wherein the first set of center portions and the second set of center portions are configured to provide a plurality of physically separate magnetic flux paths.

Abstract: To greatly improve the productivity, the general versatility, the downsizing, the performance and the like, as compared to those of the conventional transformer, provided is a transformer including: a core; a primary winding; a secondary winding; a bobbin provided with a low voltage side coil winding portion and a high voltage side coil winding portion, wherein the secondary winding is wound onto each of the coil winding portions; and a casing disposed so as to cover an outer periphery of the bobbin, wherein the primary winding is wound onto a portion of an outer periphery of the casing corresponding to a position of the low voltage side coil winding portion.

Abstract: In a common-mode choke coil, first annular conductors are helically defined from the lower layer to the upper layer, and first annular conductors are helically defined from the upper layer to the lower layer. Further, second annular conductors are helically defined from the lower layer to the upper layer, and second annular conductors are helically defined from the upper layer to the lower layer. The first annular conductors and the second annular conductors are disposed alternately in a lamination direction. The first annular conductors and the second annular conductors are disposed such that substantial portions of the annular conductors adjacent to each other in the layer direction do not overlap in a planar view. This structure achieves a compact common-mode choke coil with which the loss of normal-mode signals is small, and which is highly capable of removing common-mode noise.

Abstract: A wire-wound electronic component, a core for a wire-wound electronic component and a method for manufacturing a core for a wire-wound electronic component are provided. A winding core portion of a core of a wire-wound electronic component includes flanges at respective ends of the winding core portion, and project in directions perpendicular to an axial direction of the winding core portion. Concaves are positioned at corners formed of adjoining surfaces of the flanges that adjoin to the winding core portion and end surfaces of the flanges that are located at ends in a first perpendicular direction, which is one of the projecting directions of the flange. Connecting surfaces, which connect contact portions where the flanges contact with the winding core portion to the end surfaces, are at least part of inner peripheries of the concaves. All normal vectors of the connecting surfaces have components in the first perpendicular direction.

Abstract: The present invention relates to a winding and a method for preparing a winding of inductive devices. The winding includes at least a plurality of layers, where each layer includes at least one conductive loop; the conductive loops are electrically connected to form a winding; and the conductive loop or the portion of the conductive loop of at least one layer is not spatially aligned with the conductive loop or the portion of the conductive loop of at least one another layer. The winding may be prepared by adopting a PCB process or semiconductor process, which can effectively consume less of surface area on the integration substrate, have a symmetric trace and reduce the parasitic coupling capacitance while acquiring a high Q-factor value. The windings of the present invention may be used for making an inductor or a transformer.

Abstract: Disclosed herein are an inductor and a manufacturing method thereof. The manufacturing method of an inductor includes: positioning a printed circuit board (PCB) including a predetermined pattern formed thereon and an insertion part formed at one side thereof; fixing a protrusion part formed at a lower portion of a core so as to be inserted into the insertion part; electrically connecting both ends of a coil wound around the core to a lower PCB terminal disposed at a lower portion of the PCB, respectively; and forming an appearance so that the core, the coil, and an upper exposed surface of the PCB are received therein.

Abstract: A common mode filter is disclosed. The common mode filter in accordance with an embodiment of the present invention includes: a magnetic substrate; a dielectric layer laminated on the magnetic substrate; an external electrode formed on the dielectric layer in such a way that one surface thereof is exposed to an outside; a conductive pattern formed on a surface of the dielectric layer so as to be located on a same plane as the external electrode and having one end thereof connected with the external electrode; an insulator film formed on a surface of the conductive pattern; and a magnetic layer formed on the insulator film so as to cover an upper surface and a lateral surface of the conductive pattern.

Abstract: An interconnectable bobbin has first and second end flanges and a fastener on the first end flange positioned to engage a second bobbin on an adjacent leg of a multiple leg magnetic core. A magnetic component apparatus includes one or more of the interconnectable bobbins, the magnetic component apparatus including a magnetic core with first and second legs, the first leg extending into a first bobbin, and the second leg extending into a second bobbin, wherein the first and second bobbins are fastened together.

Abstract: A primary coil is configured by series connection of a first coil element (L1a), a second coil element (L1b) and a fifth coil element (L1c), and a secondary coil is configured by series connection of a third coil element (L2a), a fourth coil element (L2b) and a sixth coil element (L2c). The coil elements (L1a, L2b, L1c) are disposed coaxially and the coil elements (L2a, L1b, L2c) are also disposed coaxially. The respective coil elements (L1a, L1b, L1c) of the primary coil and the respective coil elements (L2a, L2b, L2c) of the secondary coil are disposed adjacently in a layer direction of a base material layer, respectively. The coil elements (L1a, L1b, L1c, L2a, L2b, L2c) are connected in such a manner that a magnetic field in the same direction is generated in all of the coil elements (L1a, L1b, L1c, L2a, L2b, L2c) when common mode current flows.

Abstract: Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.

Abstract: A magnetic device includes a T-shaped magnetic core, a wire coil and a magnetic body. The T-shaped magnetic core includes a base and a pillar, and is made of an annealed soft magnetic metal material, a core loss PCL (mW/cm3) of the T-shaped magnetic core satisfying: 0.64×f0.95×Bm2.20?PCL?7.26×f1.41×Bm1.08, where f (kHz) represents a frequency of a magnetic field applied to the T-shaped magnetic core, and Bm (kGauss) represents the operating magnetic flux density of the magnetic field at the frequency. The magnetic body fully covers the pillar, any part of the base that is located above the bottom surface of the base, and any part of the wire coil that is located directly above the top surface of the base.

Abstract: A power supply apparatus including a first magnetic core, a second magnetic core having a shape symmetrical to a shape of the first magnetic core, a third magnetic core between the first and second magnetic cores, a first coil wound around at least one of the first and third magnetic cores, and a second coil wound around at least one of the second and third magnetic cores, wherein a material for the third magnetic core is different from a material for the first magnetic core or the second magnetic core.

Abstract: The invention relates to a power transformer with electronic components. The aim of the invention is to arrange the energy supply of the electronic components of a power transformer closer to the components and thus eliminate the disadvantages of the prior art. According to the invention, a stray field collector is brought into a stray field of the power transformer, whereby a voltage is generated.

Abstract: An inductive device is provided, which includes a substrate, a layer having a plurality of conductive metal traces and a metal shield layer. The conductive trace has an input port, a first portion, a second portion, a third portion and an output port. The metal shield layer is disposed between the substrate and the conductive trace. Each of the plurality of conductive metal traces has a respective length and a respective width. Each of the plurality of conductive metal traces are separated from one another. Each of the plurality of conductive metal traces are disposed perpendicularly with the first portion and the third portion. The metal shield layer provides spaced shield traces substantially perpendicular with the conductive metal traces.

Abstract: A method provides a radial drop winding for an open wound transformer. A plurality of non-electrically conductive posts are arranged to define an interior space. Each post is of generally L-shape having a main body and a leg extending from a bottom end of the main body. During an open winding process, conductive wire is dropped to build up lengthwise along the posts to define at least one generally cylindrical winding segment supported by the legs of the posts.

Abstract: There is provided a winding structure, a coil winding, a coil part, and a coil winding manufacturing method, which are capable of preventing occurrence of an extra space due to existence of a connecting wire part when two winding parts and a connecting wire part connecting the winding parts are formed.

Abstract: At least two winding modules nested hollow-cylindrically one inside the other and extending around a common winding axis, wherein said winding modules are spaced radially apart from one another within at least one hollow-cylindrical cooling channel arranged therebetween by means of insulation strips, wherein the insulation strips have a cross-sectional form which avoid a surface profile radially with respect to the winding axis, the insulation strips including one of a fiber-reinforced epoxy, polyester resin, or from an unreinforced thermoplastic material.