Abstract: A damascene process is utilized to fabricate the segmented magnetic core elements of an integrated circuit inductor structure. The magnetic core is electroplated from a seed layer that is conformal with a permanent dielectric mold that results in sidewall plating defining an easy magnetic axis. The hard axis runs parallel to the longitudinal axis of the core and the inductor coils are orthogonal to the core's longitudinal axis. The magnetic field generated by the inductor coils is, therefore, parallel and self-aligned to the hard magnetic axis. The easy axis can be enhanced by electroplating in an applied magnetic field parallel to the easy axis.

Abstract: A method for manufacturing an inductor using a system-in-package (SIP) includes forming a first penetration electrode in a silicon substrate; depositing an insulating film on a first surface of the silicon substrate, and patterning the insulating film to form an inductor hole and a second penetration hole aligned with the first penetration hole; forming an inductor in the inductor hole and a second penetration electrode in the second penetration hole; and depositing a protective film on the insulating film and performing a back grind process such that the first penetration electrode is exposed from a second surface of the silicon substrate, the second surface being opposed to the first surface.

Abstract: A component fixing device includes a holding portion for holding a component with a hollow portion while restricting a movement of the component; and a fixed portion elastically connected to the holding portion and to be fixed to an object. The holding portion is inserted into the hollow portion of the component for holding the component. The holding portion may have a center holding portion abutting against an outer surface of the component and a pair of arm portions disposed at both sides of the center holding portion and capable of bending relative to the center holding portion, so that the center holding portion and the arm portions sandwich the component.

Abstract: An inductive coupler provides an interface between a power line and a communication device which communicates via the power line. The power line operates at a potential between four and 140 kilovolts while accommodating a current having a frequency between 45 and 65 hertz, and the communication device operates substantially at ground potential. The inductive coupler includes a split ferrite core having material selected to provide a substantially flat frequency response between one and 50 megahertz. The coupler also includes a clamping mechanism allowing the inductive coupler to clamp around the power line or around a utility line connected to the power line. Further, the coupler includes at least one lead for communicatively connecting the inductive coupler to the communication device. The inductive coupler forms an air gap when the inductive coupler is clamped. If the coupler is insulated, the insulation is also used for the air gap.

Abstract: A power inductor includes a first magnetic core having first and second ends. The first magnetic core includes ferrite bead core material. An inner cavity arranged in the first magnetic core extends from the first end to the second end. A conductor passes through the cavity. A slotted air gap arranged in the first magnetic core material extends from the first end to the second end. A second magnetic core is one of located in and adjacent to the air gap and has a permeability that is lower than the first magnetic core.

Abstract: A compact magnetic cable noise suppressor may be provided for suppressing electromagnetic cable noise. The compact magnetic noise suppressor may be formed from a ferrite material or other magnetic material with a high permeability. The compact magnetic cable noise suppressor may be mounted within a chassis of a cable connector or may otherwise be attached to a cable. The magnetic cable noise suppressor may have portions that define a cable entrance, a cable exit, and a cable path. The cable path contains at least one bend. The cable path may contain multiple bends, may contain loops, may contain spirals, and may contain one or more vertically separated layers. The cable entrance and exit may be aligned or may be at different lateral or vertical positions. The cable entrance and exit may be on opposing sides of the noise suppressor or may be on adjacent sides of the noise suppressor.

Abstract: A method of fabricating a coil-embedded inductor provides steps for obtaining uniform density of coil-embedded inductor. The cavity of a first die is filled with dust before being flipped, and then filled with dust a second time. The dust in the cavity is pressed only once for improving the density.

Abstract: On-die inductively coupled wires and a method of making on-die inductively coupled wires are described. The on-die inductively coupled wires include a first wire to carry a first current, a surface area bounded by a second wire, and, a layer to couple magnetic flux induced by said the first current through the surface area. The layer comprises regions of dielectric material and regions of soft magnetic material.

Abstract: A plasma device including a power source for creating an AC output signal with a matrix transformer between said power source and a series circuit comprising a first lead and a second lead. The matrix transformer including at least two modules with a first primary portion formed of first and second tubes connected at one end and a second primary portion formed of third and fourth tubes connected at one end, with said third and fourth tubes mounted in, and electrically isolated from, said first and second tubes, respectively, where said concentric tubes define generally parallel elongated passages through the module. A secondary winding is wrapped through the elongated passages of each module.

Abstract: A wire-wound type chip coil can take various inductance values while maintaining its outer dimension at a specified fixed value. A chip coil is formed by winding at least two conductive wires regularly in a single layer around a core made of a magnetic material and firmly connecting both ends of each conductive wire to terminal electrodes disposed on respective flanges of the core. This makes it possible to obtain a great current capacity. Furthermore, the inductance decreases because of an increase in the magnetic path length. A great number of different inductance values can be easily obtained by properly selecting parameters including the number of substantially parallel conductive wires, the diameter of each conductive wire, and the number of turns.

Abstract: An impact and vibration-resistant noise filter avoiding cracking of a core at the time of application of a vibration or impact. The noise filter includes a case and core. The case has a first case portion having a first wall portion, a second wall portion, and a first bottom wall portion. The first and second wall portions have first and second parting surfaces, respectively on the end surfaces thereof. The first bottom wall portion is positioned between the first and second wall portions. A first supporting piece 31B, whose base end is positioned on the side of the first bottom wall portion and whose free end extends toward the first parting surface, is formed on the first wall portion. Similarly, a second supporting piece is formed in the second wall portion. First and second presser pieces are formed respectively on the first and second bottom wall portions. The core is resiliently retained by the first and second supporting pieces, and first and the second presser pieces.

Abstract: A power inductor includes a first magnetic core material having first and second ends. An inner cavity is arranged in the first magnetic core material that extends from the first end to the second end. First and second notches are arranged in the first magnetic core material that project inwardly towards the inner cavity from one of the first and second ends. A first conductor passes through the inner cavity and is received by the first notch.

Abstract: A magnetic element includes a drum core provided with a flange portion having a flange surface at each end portion of a winding shaft, a coil wound on the winding shaft, a terminal to connect each end portion of the coil, and a shield core provided with an engagement portion having such a shape that partially fits in along an outer circumference of the flange portion.

Abstract: A device, system, and method for suppressing electromagnetic interference (EMI). In one embodiment, an EMI suppression device includes a compound ferrite core having an inner ferrite core and an outer ferrite core. The inner core includes a through hole in which a conductor may be mounted, and the outer core includes a hole in which said inner core is mounted in a concentrically offset manner. The outer core is rotatably adjustable with respect to the inner core in a manner such that the ferrite circuit cross-section area may be varied. The magnetic reluctance of the compound core is controlled in accordance with EMI suppression requirements by adjusting the circuit cross-section area.

Abstract: A power inductor comprises a first magnetic core material having first and second ends. An inner cavity is arranged in the first magnetic core material and extends from the first end to the second end. A crossover conductor structure includes a first lead frame that passes through the inner cavity and that has a first terminal and a second terminal, a second lead frame passes through the inner cavity and has a first terminal and a second terminal. The first and second terminals of the first lead frame are located at first opposite diagonal corners of the inner cavity and the first and second terminals of the second lead frame are at second opposite diagonal corners of the cavity. An insulating material is located between the first and second lead frames.

Abstract: There is provided an inductive coupler for coupling a signal to a conductor. The inductive coupler includes (a) a magnetic core having an aperture through which the conductor is routed, (b) a winding wound around a portion of the magnetic core, where the signal is coupled between the winding and the conductor via the magnetic core, and (c) an electrically insulating, compressible material situated between the winding and the magnetic core, having a hardness of between about 10 and about 100 on a hardness type shore A durometer scale.

Abstract: There is provided an inductive coupler for coupling a data signal to a phase line of a power line. The inductive coupler includes a split magnetic core having an aperture formed by an upper magnetic core and a lower magnetic core. The aperture permits the phase line to pass therethrough as a primary winding, the upper magnetic core is for making electrical contact with an outer surface of the phase line, and the lower magnetic core makes electrical contact with the upper magnetic core.

Abstract: The present invention relates to transformer 1 inductor devices and to the methods of construction for inductive components such as inductors, chokes, and transformers. Plural via holes are formed through a ferromagnetic substrate. Primary and secondary conductors are placed through common vias to form a plurality of cell transformers have a 1:1 turns ratio. Circuits connect these primary and secondary winding in parallel and serial combustion to provide a transformer having the desired turns ratio.

Abstract: A coaxial push pull transformer is an improved matrix transformer. A number of magnetic cores each contain a pre-wired secondary circuit. The secondary windings are tubular and extend through the core, and the ends of the tubular secondary windings are terminated to make connections to a secondary circuit, such as rectifiers. The cores are placed end to end with the tubular secondary windings aligned and the primary winding is then threaded through all of the cores, so that it is coaxial with the secondary windings when installed, for very low leakage inductance. In the design of the coaxial push pull transformer, care is taken to arrange the terminations of the transformer such that each termination is paired with another termination having a counter-flowing current, to cancel part of the field caused by the flowing currents so as to reduce the overall inductance of the terminals and interconnections.

Abstract: The coupling device of the present invention includes a housing, a first fastening member attached to said housing and coupled to the power line, a second fastening member attached to the housing and coupled to the power line, an inductor providing an impedance to data transmissions between the first fastening member and the second fastening member; a first conductor having a first end electrically coupled to the first fastening member; and a second conductor having a first end electrically coupled to the second fastening member. The second ends of the first conductor and second conductor providing data signals to a connector. In addition, the housing may include a transformer secured therein for coupling power transmissions to the connector.

Abstract: There is provided an inductive coupler for coupling a signal to a conductor. The inductive coupler includes (a) a magnetic core having an aperture through which the conductor is routed, (b) a winding wound around a portion of the magnetic core, where the signal is coupled between the winding and the conductor via the magnetic core, (c) an electrically insulating material situated between the winding and the magnetic core, and (d) a compressible material situated between the magnetic core and the electrically insulating material. The compressible material has a hardness that is less than that of the electrically insulating material.

Abstract: A ferrite core for use in coupling transformers and distributing transformers in CATV equipments such as couplers, distributors and amplifiers, the ferrite core being made of a ferrite having a saturation magnetostriction |?S| of 8×10?6 or less in an absolute value and an initial permeability ?i of 300 or more.

Abstract: A power inductor includes a magnetic core material having first and second ends. An inner cavity arranged in the magnetic core material extends from the first end to the second end. A conductor passes through the cavity. A slotted air gap arranged in the magnetic core material extends from the first end to the second end.

Abstract: The winding of matrix transformers having multiple turn primary windings is made much easier, and the resulting transformer is much more consistent, if a “cellular” insert having a plurality of through holes is placed through each trough hole of the matrix transformer. Preferably, there is one hole in the cellular insert for each wire, though two or more wires can be placed in each hole. In one embodiment, insulating cellular inserts are placed through the entire length of the cellular transformer to guide and locate the primary windings. In another embodiment, each element of the cellular transformer has cellular inserts, and the elements are coupled together. In another embodiment, the cellular insert is a conductor and is part of the secondary circuit.

Abstract: There is provided a method for blocking a portion of energy of a signal in a power line. The method includes equipping a high frequency magnetic core with a coil, connecting a capacitor across terminals of the coil to create a resonant circuit that resonates at a frequency of the signal, and placing the magnetic core around the power line, at a location where the blocking is desired.

Abstract: The invention relates to a bushing-type transformer (1) comprising a conductive element (5) forming the primary conductor, supporting a flat contact surface (7) on one end thereof and a plug-in contact element (8) on the other end thereof, whereby the plug-in contact element (8) is embodied in a rotationally symmetrical manner and the rotational axis is arranged parallel to the flat contact surface (7). Said transformer also comprises a secondary winding (6) which surrounds the conductive piece (5) in an annular manner. The conductive element (5) extends in a linear manner and the plug-in contact element (8) is arranged on the surface area of the conductive piece (5).

Abstract: An inductive device comprises an electric winding component having a generally toroidal shape, and a plurality of discrete magnetic components at least partially embracing the electric winding component so as to complete a magnetic flux path and to form at least one gap between end portions of the plurality of discrete magnetic components.

Abstract: A common mode choke coil has a plurality of metallic conducting wires buried into a sintered magnetic material such that the metallic conducting wires are proximate to each other and an electrode mounted on a surface of the sintered magnetic material so as to be connected to each end portion of each of the metallic conducting wires. The metallic conducting wires are integrally coated with a non-magnetic and electrically insulating material at a predetermined distance between each of the metallic conducting wires to thereby form coated conducting wires. The coated conducting wires buried into the sintered magnetic material are thus obtained.

Abstract: The circuit contains a primary coil on the core (2) of a magnetic circuit with an air gap and switchable into a line carrying the measurement current. A secondary compensation coil (5), with an order higher winding count and mounted on the core, is connected to the output of a controllable compensation current source (6). The output of a Hall element (11) in the air gap is connected to the control input of the compensation source. A further coil (14) on the core is connected to an additional controllable current generator (15) whose control input (16) is driven by a measurement device (13) for the compensation current via a control and evaluation circuit (17). USE/ADVANTAGE—Measuring a.c. and d.c. Can be produced at low cost and all drift occurring during measurement can be compensated.

Abstract: A transformer for substantially matching the impedance of a generator and a load, which is coupled to the generator via a transmission line. The transformer comprises an outer conductor having an inner surface and an inner conductor having an outer surface that is positioned within the outer conductor. The transformer further includes a plurality of transformation sections, where each section provides a particular separation distance between the inner surface of the outer conductor and the outer surface of the inner conductor to yield a particular characteristic impedance for each of the plurality of transformation sections, thereby substantially matching the impedance of the generator to the load.

Abstract: A center tapped chip inductor includes a core and a winding formed from one or more wires wrapped about the core. A first and a second end terminal are provided along with a medially disposed center terminal, all of which are in electrical contact the winding. By providing a center tap on a chip inductor, a high Q component can be produced while retaining the spatial limitations of a two terminal chip inductor.

Abstract: A method of producing a chip inductor including the steps of inserting a conductive wire made of a metallic wire into a metallic mold, supporting both end portions of the conductive wire on support portions provided on inner surfaces of the metallic mold so as to position the conductive wire in the approximate center portion of the metallic mold, casting magnetic ceramic slurry into the metallic mold, molding the ceramic slurry case in the metallic mold by wet pressing to obtain a molding body having the conductive wire embedded therein, firing the molding body, and forming external electrodes on both end surfaces of the fired magnetic core such that the external electrodes are connected to both end portions of the conductive wire.

Abstract: The invention relates to a transformer comprising a closed probe core (2) consisting of a soft magnetic material, a probe coil (3), at least part of which is wound around the probe core (2), a closed compensation core (1) consisting of soft magnetic material, and a compensation coil (4), at least part of which is wound around the probe core (2) and the compensation core (4). The probe core (2) and the compensation core (4) are arranged in relation to one another in such a way that a conductor (5), which carries a measuring current, can be guided through the probe core (2) and the compensation core (1).

Abstract: An apparatus for situating a toroidal inductor having an inductor inner dimension, such as a ferrite bead, onto a rod having a diametral dimension. The apparatus comprises a flexible tubular supporter that has a first end, a second end, a support inner dimension substantially equal to the diametral dimension and a support outer dimension. The supporter flexes when installing the inductor to establish the support outer dimension at less than the inductor inner dimension to allow the inductor to surround the supporter and rod situated intermediate the first and second end with the supporter flexed to establish the support outer dimension at greater than the inductor inner dimension intermediate the inductor and the first and second end. Alternatively, the supporter may be a molded or snap-on cover substantially enclosing the inductor with apertures for frictionally fitting over a rod to secure the inductor in place.

Abstract: There is provided an inductor for heating the inner circumference of a hole, by which induction heating of the inner circumference of a hole and so on can be realized rapidly and uniformly in the direction of the circumference, and there is no risk of a short-circuit between a solenoidal coil and transition conductor passing therethrough. According to a configuration in which a magnetic core 12 with a cylindrical shape is arranged inside of a solenoidal coil 11a which forms the inductor 10, and a transition conductor 11c extending from one end of the solenoidal coil 11a to a feeding terminal through the inside of the solenoidal coil is arranged in an inserted manner into a hollow portion of the magnetic core 12, a risk of the short circuit is avoided by using an insulating material for the magnetic core 12, assuming that the magnetic core 12 with a large cross-sectional area is concentrically arranged in the solenoidal coil 11a.

Abstract: A flat high-voltage impulse transformer is proposed, which can be used in conjunction with a high-intensity discharge (HID) lamp to provide a high-magnitude pulsed voltage to ignite the HID lamp. The proposed transformer structure is characterized by the use of an elongated magnetic core that is made of a magnetic material having a substantially square hysteresis loop and whose saturated flux density is at least two times greater than ferrite, and the primary winding is arranged at the middle section of the elongated magnetic core while the secondary winding is arranged at opposite sides of the primary winding on the elongated magnetic core. This feature allows the transformer of the invention to provide a better voltage transforming effect, and also allows the transformer of the invention to be made more flatted in profile to provide a compact size.

Abstract: An inductive device comprises a magnetic core including a portion of a plurality of wires, at least one electric winding extending around the magnetic core, each of the plurality of wires substantially encircling the at least one electric winding, and at least one biassing magnet disposed adjacent the plurality of wires to provide a bias magnet flux for offsetting a flux generated by a direct current component flowing in the winding.

Abstract: A surface mountable coil is provided with a drum-shaped core including a body portion and raised portion each raised portion having a peripheral surface and an end surface, a winding wire wound around the body portion, an encapsulating member, base electrodes, and terminal electrodes. The encapsulating member exposes some portions of the base electrodes on the peripheral surfaces and substantially the whole base electrodes on the end surfaces. By exposing the portions of the base electrodes on the peripheral surfaces and whole base electrodes on the end surfaces, the contact strength between the base electrodes and the terminal electrodes can be substantially increased.

Abstract: A coaxial inductive power transfer and distribution apparatus includes a stationary primary conductor and a mobile secondary coil magnetically coupled together to provide for inductive power transfer therebetween. A return conductor that is stationary is mechanically coupled to the primary conductor and ensures the position stability of the primary conductor with respect to the moveable secondary coil. The return conductor also includes an air gap in which a support member for the mobile secondary coil is disposed within. The mobile secondary winding includes a high permeability toroidal core that is coaxially disposed about, and spaced apart from, the primary conductor. A multi-turn coil is radially disposed about the high permeability toroidal core. The support member for the mobile secondary winding extends through the air gap in the return conductor to the exterior of the return conductor, where it may be coupled to an electric vehicle.

Abstract: The planarization of inductive components by reducing standard coiled designs to single turn, open ended designs from which the required parameters are obtained by scaling the length. Single turn designs having magnetic material encircling the conductors along their full length enable the thinnest form. The single turn, open ended form also enables the inductive component to be routed according to any shape in the plane or on any conformal surface. The single turn inductors do not need to coil hence there is no overlap necessary in the plane. The planar form allows integration of inductive components with integrated circuits. These inductive components can be embedded in other materials. They can also be fabricated directly onto parts.

Abstract: In a three-phase current transformer, a plate adaptor includes first to third coil insertion slots and is a magnetic shield. First to third Rogowskii coils are arranged in the first to third coil insertion slots. The metal adaptor is fixed with a phase-to-phase magnetic shield and an outer peripheral magnetic shield. An end magnetic shield is fixed to an end portion of the phase-to-phase magnetic shield.

Abstract: A common mode and differential mode inductance assembly including first and second torridial cores wherein first and second windings are wrapped about first and second segments of the first core and the first core forms a first surface and wherein the second core forms a second surface and is positioned adjacent the first core such that the first and second surfaces oppose each other and a gap is formed between the first and second surfaces.

Abstract: A transformer includes a core having an aperture formed therein and a conductive bar extending through the core. The aperture in the core has a centroidal axis The conductive bar includes: a first surface extending generally parallel to the centroidal axis, a second surface opposite the first surface and extending generally parallel to the centroidal axis, the first surface being closer than the second surface to said centroidal axis. The conductive bar also includes means for diverting electrical current flowing through the conductive bar towards said first surface.

Abstract: The present invention provides an apparatus for use in arcing fault detection systems within circuit breakers and which is adapted for automated production by top-down assembly. In one embodiment, the apparatus includes a circuit board and a two-piece sensing coil within a two piece housing with its center oriented horizontally relative to the circuit board. In other embodiments the sensing coil is one-piece and is either preassembled with a sensing bus and oriented horizontally or oriented vertically relative to the circuit board. The invention also includes several methods for making electrical connections to the circuit breakers.

Abstract: An ignition coil assembly includes a core formed of magnetically-permeable material extending along a main axis, a primary winding disposed about the core, a secondary winding disposed on a secondary winding spool wherein at least one of the secondary winding leads is connected to a high-voltage connector terminal portion of the ignition coil assembly configured for connection to a remotely disposed spark plug, a case formed of electrical insulating material, and a magnetically-permeable shield disposed outwardly of the case. The secondary winding is progressively wound on the secondary winding spool, thereby eliminating failure modes associated with the segment-wound secondary windings, and, eliminating the need for pole pieces in the magnetic circuit, thereby reducing components, cost, weight, and size of the ignition coil assembly.

Abstract: A transformer includes a core having an aperture formed therein and a conductive bar extending through the core. The aperture in the core has a centroidal axis The conductive bar includes: a first surface extending generally parallel to the centroidal axis, a second surface opposite the first surface and extending generally parallel to the centroidal axis, the first surface being closer than the second surface to said centroidal axis. The conductive bar also includes means for diverting electrical current flowing through the conductive bar towards said first surface.

Abstract: An electric noise absorber for preventing looseness of magnetic body parts in a closed housing, without increasing the number of parts or decreasing the strength of the housing. The housing comprises a pair of case halves which house ferrite core halves, respectively, and are hinged to each other. The bottom wall of each case half is formed with a curved shape convex toward the space housing the ferrite core half. When the case halves are closed with the ferrite cores therein, the ferrite cores press each other toward respective bottom walls and resiliently deform the walls. The resilience of the deformed bottom walls urges abutting surfaces of the ferrite cores into close contact.

Abstract: An arrangement for reducing leakage flux of a transformer or the like conducted to a clamping bar, and a transformer which comprises one or more leakage flux guides (10 to 17) for at least one transformer pole (3) provided with the windings (4), the leakage flux guides being arranged such that they are secured to the clamping bar (1), or in connection therewith, at points that are free from obstacles (20, 30) associated with the clamping bar such that they cover a portion of the clamping bar substantially at the windings and that the magnetic connection of the leakage flux guides to the core is better than the magnetic connection to the clamping bar, whereby they direct the conducted leakage flux mainly to the core reducing the conduction of the leakage flux to the clamping bar.

Abstract: A choke coil is provided with a coil formed of a conducting wire covered by an insulating coating and wound in a coil shape; a conducting ring provided one on both ends of the coil; and a bar-shaped core formed of ferrite, ceramic, or the like and penetrating the coil. The ring has a prescribed width and has a centerline extending in the axial direction of the core.

Abstract: A sensor for detecting RF current flowing in a conductor includes a layer 10 of insulating material with a hole 16 for the passage of the RF conductor 18 in a direction normal to the layer. A plurality of conductive tracks 20, 22 (FIG. 3) on the opposite major surfaces of the layer are selectively joined by a plurality of through-holes each containing conductive material. The conductive material selectively connects the conductive elements 20, 22 to form a plurality of loops (FIG. 4) disposed non-parallel to the layer 10 for inductive coupling to the RF conductor 18.