Abstract: Provided is a coil molded article including: a coil having a winding portion; and an integration resin portion that coats at least an inner peripheral face of the winding portion, wherein the coil molded article further includes a gap portion that is integrated into the inner peripheral face and divides an internal space of the winding portion into two portions in an axial direction of the winding portion. Further provided is a reactor including: the above-described coil molded article; and a magnetic core including an inner core portion that is arranged inside the winding portion included in the coil molded article, and an outer core portion that is arranged outside the winding portion.

Abstract: A reactor including: a coil that includes a winding portion; a magnetic core that includes a plurality of core pieces that are located inside and outside the winding portion; an interposed member that is interposed between the coil and the magnetic core; and a resin mold portion that includes an outer covering portion that covers at least a portion of an outer core piece of the magnetic core, the outer core piece being located outside the winding portion. The interposed member includes an outer interposed portion that is interposed between an end surface of the winding portion and an inner end surface of the outer core piece, and the outer interposed portion has a hole on the outer core piece side, through which a portion of the inner end surface of the outer core piece is exposed from the resin mold portion.

Abstract: An electromagnetic induction device comprises a closed magnetic circuit, without air gap, of which at least one first part is substantially rectilinear and surrounded by a sleeve, the sleeve being surrounded by an electrical conductor which comprises at least one metal sheet electrically insulated on at least one of its faces, wherein at least the first part of the magnetic circuit has a section of circular form.

Abstract: A power conversion apparatus includes a first power conversion circuit including a first switching element, a second power conversion circuit including a second switching element, a DC conductor which is provided in the first power conversion circuit and supplies a DC power to the first power conversion circuit, and a connection conductor which is provided in the first power conversion circuit, has a length having an inductance for inhibiting a flow of a ripple current caused by switching of the second switching element of the second power conversion circuit, and connects the DC conductor and the second power conversion circuit.

Abstract: An ignition coil for internal combustion engine includes: a center core disposed on an inner side of a primary coil and a secondary coil and a side core disposed on an outer side of the primary and secondary coils whose one end face abuts on one end face of the center core and the other end face abuts on the other end face of the center core via a magnet. The side core is formed of a plurality of side core portions obtained by dividing laminated magnetic steel plates at different positions in a longitudinal direction thereof and has a superimposed portion in which the magnetic steel plates of the adjacent side core portions mutually superimpose between the different positions in the longitudinal direction. It thus becomes possible to provide an ignition coil for internal combustion engine capable of suppressing an increase of magnetic circuit resistance markedly without deteriorating assembly workability.

Abstract: Magnetic component assemblies for circuit boards include magnetic cores formed with a gap and preformed conductive windings sliding assembled to the cores via the gaps. The gaps in the cores are filled with a magnetic material to enhance the magnetic performance. The magnetic component assemblies may define power inductors.

Abstract: A high-frequency transformer includes a plurality of cores having a central leg, the cores being arranged to form core windows that are separated by the central legs. A primary winding has a predetermined length of electrically conductive wire that is wound about the central legs and extends through each of the core windows. One or more secondary windings extend through each core window, generally adjacent to the primary winding. The core windows are sized and shaped to provide a predetermined amount of leakage inductance between the primary and secondary windings, and are further adapted to provide a path for cooling air through an interior portion of the transformer.

Abstract: A three step non-linear transformer core is formed from three sections of laminations each having different widths and cross-sectional areas. A first section of laminations is formed by cross-slitting a generally rectangular sheet or strip of metal. A resulting generally triangular segment is then wound upon a mold to form a first section of a core frame having a trapezoidal cross section. A second section of laminations is wound upon the first section of laminations to form a segment of a core frame having a rhombic cross section. The third section of laminations is wound upon the second section of laminations to form a segment of a core frame having a trapezoidal cross section. Each of the first, second, and third sections of laminations are offset from one another by a predetermined angle of offset.

Abstract: A magnetic core includes a first core having a recess and a second core, which has a first end portion and a second end portion both held in contact with the first core and forms a closed magnetic path with the first core. The second core is formed of material having a lower magnetic permeability and a higher saturation magnetic flux density than those of the first core. The second end portion includes a distal surface having an area larger than the cross-sectional area of the first end portion in a direction perpendicular to the direction in which a magnetic flux flows in the closed magnetic path. The distal surface of the second end portion is held in contact with the first core and the first end portion is engaged with the recess in the first core.

Abstract: A magnetic core for an electromagnetic device is formed from alternating interleaved steel laminations. The core comprises a plurality of core elements comprising legs and yokes oriented substantially quadrature to the legs, such that abutting core elements are in substantially quadrature relation. A plurality of flux deflection zones are defined in regions where flux flows from one core element to an abutting core element. At least one of the layers has at least one core element composed of grain-oriented steel, and the remaining core elements are composed of non-grain-oriented steel, such that at least some flux deflection zones are composed of a substantial amount or substantially entirely of non-grain-oriented steel. Flux flowing in the direction of the grain orientation in the core element(s) composed of grain-oriented steel changes direction to flow through the abutting core element in the flux deflection zone composed of non-grain-oriented steel.

Abstract: A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment.

Abstract: An underwater power connection system (10) has at least two separable magnetic cores (40, 50) which are operable when coupled together to form a magnetic circuit, where the at least two cores (40, 50) are provided with respective one or more windings, and said cores (40, 50) include a transverse magnetic member arrangement (60, 80) supporting magnetic limbs (70, 90), where the limbs (70, 90) are elongate and are adapted to intermesh with their lateral sides mutually abutting for providing the magnetic circuit when the system (10) is in its assembled state (210), and where the limbs (70,90) are of tapered form towards their distal ends.

Abstract: A magnetic core includes a first core and a second core made of a material whose magnetic permeability is smaller than that of the first core and having an end. The end of the second core is in contact with the first core so that the first core and the second core cooperate to form a closed magnetic circuit. The area of contact between the end of the second core and the first core is larger than the area of the cross-section of the end as taken perpendicularly to the extending direction of the end of the second core.

Abstract: An encapsulated electronic device includes a magnetically permeable core structure which is exposed within and coplanar with a flat top surface of the device. A bottom surface of the core may be exposed within the bottom surface of the device. The bottom core surface may be recessed beneath, coplanar with, or protruding from the bottom surface of the device. Alternatively the bottom surface may be encapsulated within the device. A method for manufacturing the exposed core package includes positioning a first component relative to a second component before encapsulating the device. An improved planar magnetic core structure includes internal bevels having a radius greater than or equal to 15% and preferably 25%, 35%, or as much as 50% of the core thickness to reduce concentration of the magnetic field around the internal corners.

Abstract: An encapsulated electronic device includes a magnetically permeable core structure which is exposed within and coplanar with a flat top surface of the device. A bottom surface of the core may be exposed within the bottom surface of the device. The bottom core surface may be recessed beneath, coplanar with, or protruding from the bottom surface of the device. Alternatively the bottom surface may be encapsulated within the device. A method for manufacturing the exposed core package includes positioning a first component relative to a second component before encapsulating the device. An improved planar magnetic core structure includes internal bevels having a radius greater than or equal to 15% and preferably 25%, 35%, or as much as 50% of the core thickness to reduce concentration of the magnetic field around the internal corners.

Abstract: A three phase compact high short circuit current reactor also commonly known as an inductor is disclosed which can be easily be modified during initial construction to provide predefined gaps between the internal core sections for enhancing performance for each individual customized application. Inductor core sections are commonly oriented horizontally. The present design provides a core construction which includes multiple vertically stacked coils with yokes positioned between adjacent coils for facilitating flux cancellation to enhance performance. The coils can be round or square in cross-section and normally are made of either wire or foil usually of copper or aluminum. The material of the core is preferably of a silicon steel material which can be grain-oriented or non-grain-oriented.

Abstract: A composite transformer includes: a transformer core including transformer-core legs; inductor cores including inductor-core legs; windings wound around the transformer-core legs and the inductor-core legs; the transformer core includes a pair of transformer bases connected to both ends of each of the transformer-core legs, and allows formation of closed magnetic circuits in the transformer core; each of the inductor cores includes one of the inductor-core legs, an outer core leg, and a pair of inductor bases connected to both ends of the one of the inductor-core legs and both ends of the outer core leg, and allows formation of a closed magnetic circuit in each inductor core; and the windings are wound in such directions that the magnetic fluxes produced in the transformer-core legs cancel each other in the closed magnetic circuits in the transformer core whichever of the windings is energized.

Abstract: A method for producing a transformer core with layers of core laminations includes forming at least one core lamination of at least two segmental laminations. An end region of a first segmental lamination has a straight crosscut edge. The straight crosscut edge of the first segmental lamination together with a corresponding straight crosscut edge of an end region of a second segmental lamination forms a form-locking straight abutting edge. The straight abutting edge is at an angle relative to the longitudinal direction of the end region of one of the segmental laminations of the first core lamination. Using core laminations having different angular orientations of the abutting edges, avoids magnetic losses such as those occurring when using conventional layering techniques. Simultaneously, an intermediate space created by conventional layering techniques between individual core lamination packs can be minimized, and thereby susceptibility to corrosion can likewise be reduced or completely avoided.

Abstract: An oil filled high power transformer for high voltages with coils. The transformer including a number of stacked layers of, in the main concentric, insulated conductors forming transformer coils. The winding layers are separated by spacers. One or more spacers are provided with at least one integrated electrical discharge barrier extending off the central body of the spacer in the vicinity of the area where the spacer is in contact with a winding. Breakdown along spacer and alongside the spacer-oil interface is reduced getting improved breakdown strength of the oil filled transformer.

Abstract: Magnetic circuit comprising a gap bridging element made of a non-magnetic metal and a wound magnetic core comprising a plurality of stacked concentric ring layers of magnetic material having a high magnetic permeability. The magnetic core has a gap extending through a section of the stacked concentric ring layers of magnetic material, wherein the bridging element is welded to a lateral face of the wound magnetic core on either side of the gap. Welding connections between the bridging element and the magnetic core extend across the stacked concentric ring layers.

Abstract: An inductor device is described. The inductor device includes a core comprising two core sections, at least one gap defined between the two core sections, and at least one cast coil and fringe shield assembly. The at least one cast coil and fringe shield assembly includes a conductor winding and a fringe shield sealed within an insulator. The at least one cast coil and fringe shield assembly is configured to at least partially surround portions of the two core sections.

Abstract: An inductive element having a gap and a fabrication method thereof are disclosed. The fabrication method is for fabricating an inductive element having a first core body, a second core body and a gap, and includes: coating an adhesive on a gap-facing side of the first core body and/or the second core body; providing a linear spacer and installing the linear spacer between the first core body and the second core body; and combining the side of the first core body where the adhesive is coated with the side of the second core body where the adhesive is coated, allowing the linear spacer to form the gap when the first core body is combined with the second core body. Thereby, the linear spacer establishes the size of the gap of the inductive element and improves the adhesion of the first core body to the second core body.

Abstract: The invention relates to swinging inductors of a stepped-gap construction. We describe an inductor core structure having first and second core segments, constructed and arranged such that distal ends of legs of the first core segment are paired with distal ends of legs of the second core segment in an opposing relation. The at least one distal ends of the first core segment has a ridge projecting therefrom and is paired with the at least one distal ends of the second core segment which has a ridge projecting therefrom in an opposing relation, such that opposingly paired projecting ridges form a cross arrangement.

Abstract: A reactor includes: a first core having end surfaces; a second core having end surfaces facing the end surfaces of the first core; coils wound around at least part of the circumference of the first core and the second core; and gap members arranged between the end surfaces of the first core and the end surfaces of the second core. The coils and the gap members are integrally molded with a first resin in a state where the first and second cores are not provided. The coils and the first and second cores are integrally molded with a second resin in a state where the gap members are sandwiched between the end surfaces of the first core and the end surfaces of the second core.

Abstract: A transformer includes a frame type iron core having plate-shaped magnetic members. At least one of the plate-shaped magnetic members has a large width and forms a magnetic circuit in which a magnetic flux is concentrated. Each of the plate-shaped magnetic members includes magnetic member pieces. Each adjacent pair of end surfaces of the magnetic member pieces are joined together to form a joint portion. Three or more joint portions, each of which is formed, by joining together adjacent end surfaces of an adjacent pair of the magnetic member pieces included in the plate-shaped magnetic member having the large width, are shifted from each other in the direction of a magnetic path of the magnetic circuit to increase an effective cross sectional area of the magnetic path. The magnetic member pieces included in the plate-shaped magnetic member having the large width have a high magnetic permeability to reduce a magnetic resistance of the magnetic circuit.

Abstract: A magnetic element including a first core and a second core each of which has a winding core provided with a flange portion having a flange surface at least at one end thereof; and an intermediate core to form a closed magnetic circuit which is disposed between said first core and said second core in a manner being integrally connected with said first core and said second core.

Abstract: It is possible to provide a transformer core which can be mounted on a coil having both ends connected to a substrate or the like and can simplify the step for arranging an adhesive layer and suppress fluctuation of a magnetic gap. The transformer core (1) includes: a rectangular spacer (5, 20) having a region where a first convex portion (10, 21) is formed on the four sides of one of the surfaces as a unitary block and the first convex portion is not provided at least at a part of a pair of two opposing sides; and a sheet-shaped adhesive layer (6) bonded to a region where at least the first convex portion is not provided on the one of the surfaces of the spacer and connecting a soft ferrite core (4) to the spacer.

Abstract: A transformer core includes a stack of a plurality of planar core plates of a magnetically permeable material, which plates each consist of a first and a second sub-part that together enclose at least one opening. The sub-parts can be fitted together via contact faces that are located on either side of the opening and that extend obliquely with respect to the centerline of the core plate. The invention also relates to the use of the described transformer core in a Coriolis flowmeter with the Coriolis tube extending through the opening so as to induce a current in the tube.

Abstract: An inverter transformer to which coils for a balance transformer are integrally assembled. The inverter transformer is employed in a drive circuit for evenly driving a plurality of discharge tubes, and includes a primary coil and a secondary coil. The present invention proposes the inverter transformer which performs reduction in the number of components and in the size thereof by providing a through-hole a portion of a magnetic core section made from magnetic material configuring the inverter transformer, and by providing coils for a balance transformer through the through-hole.

Abstract: An apparatus includes an electrically conductive generally planar strip having a thickness, having a width greater than the thickness and having a length greater than the width. The strip is arranged in alternating length segments. Each adjacent pair of length segments are oriented about divergent axes and are joined by a respective transition arrangement. Each respective transition arrangement presents the strip foldingly lapped upon itself in a laminate structure.

Abstract: The claimed invention relates to arrangements of inductors and integrated circuit dice. One embodiment pertains to an integrated circuit die that has an inductor formed thereon. The inductor includes an inductor winding having a winding input and a winding output. The inductor also comprises an inductor core array having at least first and second sets of inductor core elements that are magnetically coupled with the inductor winding. Each inductor core element in the first set of inductor core elements is formed from a first metallic material. Each inductor core element in the second set of inductor core elements is formed from a second metallic material that has a different magnetic coercivity than the first magnetic material. The inductor further comprises a set of spacers that electrically isolate the inductor core elements. Some embodiments involve multiple inductor windings and/or multiple inductor core elements that magnetically interact in various ways.

Abstract: The invention relates to swinging inductors of a stepped-gap construction. We describe an inductor core structure having first and second core segments, constructed and arranged such that distal ends of legs of the first core segment are paired with distal ends of legs of the second core segment in an opposing relation. The at least one distal ends of the first core segment has a ridge projecting therefrom and is paired with the at least one distal ends of the second core segment which has a ridge projecting therefrom in an opposing relation, such that opposingly paired projecting ridges form a cross arrangement.

Abstract: An inductor includes a first magnetic substance core which has a middle leg, a first outer leg, a second outer leg, and a body portion interconnecting the middle leg, the first outer leg and the second outer leg, and a second magnetic substance core which is arranged to be opposed to the first magnetic substance core. A first conductor is arranged in a first space which is formed by the middle leg, the first outer leg, part of the body portion, and the second magnetic substance core. A second conductor is arranged in a second space which is formed by the middle leg, the second outer leg, part of the body portion, and the second magnetic substance core. The middle leg is formed with a region which is lower in height than the first outer leg, in the same direction as the longitudinal direction of the first outer leg.

Abstract: In a continuous flux path transformer core, at least part of the core is implemented in non-grain oriented steel.

Abstract: Methods, systems, and devices are described for integrating multiple transformers on a shared core, while avoiding interference between the transformers and other potentially undesirable effects of the integration. In one embodiment, multiple transformers are wound on a shared core. Each transformer is wound on the core, so that its primary and secondary windings are magnetically coupled to each other through the core without being coupled to the windings of other transformers sharing the core. The multiple integrated transformers may then be provided in a circuit arrangement by placing only a single core element in the arrangement.

Abstract: An ignition coil for an internal combustion engine includes a core assembly. The core assembly has a magnetically active core made of sheet-metal strips, a damping element and a sheath surrounding the core and the damping element. Different ways are described for improving the discharge of air trapped in the core assembly during casting of the ignition coil. For example, the damping element is designed with a V-shaped incision or a semipermeable diaphragm.

Abstract: A wire-wound coil includes a ferrite core having a winding core portion and flange portions, a wire wound around the winding core portion, electrodes connected to the wire on lower surfaces of the flange portions, and a ferrite plate attached to upper surfaces of both of the end flange portions so as to extend over the winding core portion. The flange portions and the ferrite plate are provided with corresponding recessed and projecting portions and, and the flange portions and the ferrite plate are integrated through the recessed and projecting portions. Joint sections between the flange portions and the ferrite plate include contact sections that are in direct contact with each other, and adhesion sections arranged to receive an adhesive.

Abstract: A method of manufacturing a magnetic core includes providing a substrate with magnetically permeable material that has a first region and a second region near the first region, providing support to maintain a juxtaposition between the first region and the second region, forming a slit through the magnetically permeable material between the first region and the second region, introducing a binding agent into the slit and removing the support; wherein the binding agent maintains the juxtaposition between the first region and the second region after the support is removed.

Abstract: There is provided a joint structure of a wound iron core in which iron core characteristics can be enhanced by improving the distribution of magnetic flux within an iron core. A wound iron core is formed to provide a joining structure or a butt joining structure and a lap joining structure disposed in an appropriate arrangement in which the a margin of overlapping is more increased as being closer to an outer periphery from an inner periphery of the iron core, taking a distribution of magnetic flux density within the iron core into consideration.

Abstract: Ferrite cores are provided with rounded, convex head ends and complimentary rounded, concave tail ends. The configuration of the head and tail ends permits a reduction in gap width between adjacent cores when they are joined together into a core assembly that suppresses electromagnetic interference emitted from a cable.

Abstract: An element for an inductive coupler in a downhole component comprises magnetically conductive material, which is disposed in a recess in annular housing. The magnetically conductive material forms a generally circular trough. The circular trough comprises an outer generally U-shaped surface, an inner generally U-shaped surface, and two generally planar surfaces joining the inner and outer surfaces. The element further comprises pressure relief grooves in at least one of the surfaces of the circular trough. The pressure relief grooves may be scored lines. Preferably the pressure relief grooves are parallel to the magnetic field generated by the magnetically conductive material. The magnetically conductive material is selected from the group consisting of soft iron, ferrite, a nickel iron alloy, a silicon iron alloy, a cobalt iron alloy, and a mu-metal. Preferably, the annular housing is a metal ring.

Abstract: A magnetic core device is provided having first and second magnetic core members. The first core member is generally E-shaped having first, second, and third surfaces. The first, second, and third surfaces have first, second, and third surface areas, respectively. The second magnetic core member is generally planar for joining with the first, second, and third surfaces of the first magnetic core member. The second core member is oversized relative to the first core member to allow for shifted and/or skewed alignment of the core members.

Abstract: Electromagnetic devices are provided including an electrically conductive core having an inner diameter defining an opening therethrough and an outer diameter, the core having sharp edges extending circumferentially around the inner diameter and around the outer diameter thereof. A plurality of polymeric protection members are wrapped circumferentially around the core and positioned adjacent the sharp edges of the core. The protection members have a short leg positioned adjacent an end of the core. A coated wire is wrapped around the core so as to be magnetically coupled thereto and around the polymeric protection members so as to be displaced from the sharp edges of the core. Polymeric protection members and methods for manufacturing such members and for fabricating devices using such members are also provided.

Abstract: Opposing concave structures formed in an end portion 22b of a stator yoke 22 and an end portion 23b of a magnetic core 23 are mated in a staggered manner and are joined. An upper projecting portion 22b-1 of the stator yoke 22 is fitted in a recessed portion formed on a lower projecting portion 23b-2 of the magnetic core 23, and the lower projecting portion 23b-2 of the magnetic core 23 is fitted in a recessed portion formed under the upper projecting portion 22b-1 of the stator yoke 22. In this state, the stator yoke 22 and the magnetic core 23 are fixedly fastened by a joint screw 24 and a tube 26. This structure makes it possible to reduce magnetic resistance in a magnetic circuit structure and to improve power-generating efficiency of a power-generating device using the structure.

Abstract: The invention provides a transformer system and method of attaching a laminated housing on the same. The transformer system includes a laminated housing with a plurality of laminates. A coil assembly producing a magnetic field is positioned within the laminated housing. At least one low power weld is positioned on the laminated housing to bond the laminates together without substantially disrupting the magnetic field. The method of attaching the laminated housing on the transformer includes applying a low power weld to the laminated housing including a plurality of laminates. The laminates are bonded together without substantially disrupting a magnetic field produced by a coil assembly positioned within the laminated housing.

Abstract: A welding electrode wire coil and a method of making the same comprises embedding the inner end of the electrode wire between adhesively bonded convolutions of a wound core made of paper to secure the wire end thereto. The coil is completed by winding the wire about the core and then lacing a cord about the core and the coiled wire thereon in a diamond stitch lacing pattern to retain the coiled wire on the core prior to use. The lacing is provided with a slip knot to facilitate its release relative to the coiled wire and core.

Abstract: A method for manufacturing magnet armatures which are used mainly in brake-pressure modulators of electronically controlled brake systems and which are provided on their entire surface with a plastic coating, for reasons of dimensional stability and sliding properties. Magnet armatures of this type are constructed as cylindrical members and are usually provided in the region of one of the two end faces with an elastomeric sealing element, which according to the prior art is bonded to the magnet armature by vulcanization, an adhesive elastomer-to-metal bond being formed between the magnet armature and the elastomeric sealing element during vulcanization. Since bonds of this type are not possible for a completely coated magnet armature, the elastomer for the elastomeric sealing element is, according to the invention, vulcanized onto the armature without using an adhesion promoter.

Abstract: An amorphous magnetic core is produced by wrapping cut strips of amorphous metal about a mandrel to form a distributed gap core. The cut strips are secured to the mandrel during assembly by wrapping the strips with amorphous metal ribbons that have been weakened in predetermined areas but not fully parted. After the core has been built to its desired size, the weakened ribbons are completely parted. This method of making an amorphous magnetic core produces a tightly wound distributed gap core without the need for a belt winder or specialized strip holding devices.

Abstract: The current transformer comprises a magnetic circuit and a secondary winding. The magnetic circuit is formed by stacked metal plates. Each plate comprises a cut-out without an air-gap. The magnetic circuit comprises a fixed first part enabling the secondary winding to be received and a flexible second part able to be momentarily deformed. The current transformer is advantageously used in protection relays and electronic trip devices of circuit breakers.

Abstract: A stacked magnetic transformer core is disclosed with center leg curvilinear S-joints for reducing losses and for minimizing waste or scrap material during the manufacture of the laminations.