Abstract: An inductance device comprises a magnetic core, a coil a conductor and a dielectric member. The coil is made of turns of insulated conductive wire. The conductor is distinct from the coil and is insulated from the magnetic core. The dielectric member is disposed between the conductor and the coil. The dielectric member, the conductor and the coil constitute a capacitor. The inductance device is used in, for example, a filter device or a noise filter.

Abstract: An electrical inductor assembly comprises an inductor core having a circular shape, a wire guide that surrounds the inductor core and includes a plurality of slots, at least one of the slots forming a path winding around the inductor core, and at least one wire placed in one of the plurality of slots to form a winding. A method of forming an electrical inductor assembly comprises forming an inductor core having a circular shape, surrounding the inductor core with a wire guide, winding at least one wire around the inductor core along a slot in the wire guide, and applying an insulating material to the slot containing the at least one wire to electrically insulate the at least one wire.

Abstract: A differential circuit layout can advantageously use step symmetry for inductors and mirror symmetry for the rest of the circuit. Interconnect segments can be used to connect the terminals of the inductors to other components in the circuit. These interconnect segments facilitate the transition from the step symmetry of the inductors to the mirror symmetry of the other components. To provide this transition, the terminals of an inductor and its associated interconnect segments are formed on a middle axis of the inductor. This mixed symmetry can advantageously cancel the common-mode magnetic field, reduce the parasitic inductor coupling, and balance parasitic wiring capacitances between the two sides of the differential circuit.

Abstract: The present invention relates in general to the field of interface technology. Electronic components, such as modular converters for measurement control and regulation technology, in particular isolation amplifiers, are known from interface technology. Such isolation amplifiers can be used for galvanic separation, conversion, amplification and filtering of standard, normal signals and for matching analog signals. These isolation amplifiers are galvanically separated from one another in the input, output and supply circuits. According to the invention, a separate component of a transformer is integrated for separation into a circuit board of an isolation amplifier with the aid of SMD mounting technology, wherein the transformer contains a combination of inductive components, consisting of a magnetic core and a winding, and a substrate which contains internal printed conductors that form planar short-circuit windings.

Abstract: An authentication method for authenticating an article in a device includes the steps of (a) reading an identification number stored on the article, (b) reading an authentication number stored on the article, (c) determining an input number based at least in part on the identification number, (d) applying an authentication function to the input number to calculate an output number, (e) determining that the article is authentic only if the authentication number corresponds to the output number, and (f) permitting use of the article in the device if the article is authentic, and disabling use of the article in the device if the article is not authentic.

Abstract: An apparatus for establishing at least one turn for a magnetic circuit includes: (a) at least one first magnetic element oriented substantially about an axis generally between a first axial position and a second axial position; and (b) at least one second magnetic element coupled with at least one selected first magnetic element of the at least one first magnetic element generally at the second axial position. The at least one second magnetic element establishes at least one return magnetic path from the second axial position generally toward the first axial position. The at least one return magnetic path is generally about the axis.

Abstract: A toroidal power transformer is disclosed. The toroidal power transformer comprises a circular core composed of plurality of laminated electrically conductive materials, a plurality of multi-layered first windings radially wound around the circular core, said winding arranged with an angular spacing of 2? and a number of windings in each winding layer is less than a number of windings in each previous layer, a multi-layered second winding radially wound around the circular core covering a corresponding one of said plurality of first windings, wherein the layers of each of said second windings are arranged to form a substantially triangular cross-section; and an insulating layer between each of said first and second windings.

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 multiple phase buck converter or boost converter, or buck-boost converter has an inductor in each phase. The inductors are inversely coupled. In a first embodiment, the converter includes a toroidal magnetic core with inductors extending under and over opposite sides of the toroidal magnetic core. The coupled inductors are thereby inversely coupled and have a relatively low ohmic resistance. In a second embodiment, the converter comprises a ladder-shaped magnetic core (i.e. having parallel sides, and connecting rungs). In this case, the inductors extend under the sides, and over the rungs. Each inductor is disposed over a separate rung. The ladder-shaped magnetic core is preferably disposed flat on a circuit board. Inverse coupling and low ohmic resistance are also provided in the second embodiment having the ladder structure.

Abstract: A method of forming an inductor. The method includes: forming a dielectric layer on a substrate; forming a lower trench in the dielectric layer; forming a liner in the lower trench and on the dielectric layer; forming a Cu seed layer over the liner; forming a resist layer on the Cu seed layer; forming an upper trench in the resist layer; electroplating Cu to completely fill the lower trench and at least partially fill the upper trench; removing the resist layer; selectively forming a passivation layer on all exposed Cu surfaces; selectively removing the Cu seed layer from regions of the liner; and removing the thus exposed regions of the liner from the dielectric layer, wherein a top surface of the inductor extends above a top surface of the dielectric layer, the passivation layer remaining on regions of sidewalls of the inductor above the top surface of the dielectric layer.

Abstract: A toroidal inductive device has an electrical winding component (11) of generally toroidal shape and discrete magnetic components (12) shaped as toric sections. The discrete magnetic components (12) are arranged on the electrical winding component such that the discrete magnetic components (12) are offset circumferentially from each other and at least partially embrace the electrical winding component (11). The magnetic components (12) define magnetic flux gaps in meridional planes. A method for forming a magnetic component is also provided wherein magnetic wire is wound onto a toroidal electrical winding component without the need for passing a spool through a central opening of the toroid.

Abstract: A toroidal step-up or step-down transformer includes a toroidal magnetic core, a primary formed from a plurality of primary windings, and a secondary formed from a plurality of secondary windings. Parallel connected windings are added to at least one of the primary and secondary to make the number of primary windings equal to the number of secondary windings, the primary and secondary windings being arranged symmetrically around the core.

Abstract: The invention comprises a power filtering method and apparatus.

Abstract: An inductor includes a casing, a coil and a core. The casing has an accommodating chamber. The casing is provided with two holes in communication with the accommodating chamber. The coil is accommodated in the accommodating chamber. The coil includes a first terminal, a first ring wrapping from a distal end of the first terminal, a second ring wrapped from a distal end of the first ring, and a second terminal extending from a distal end of the second ring. The second ring is formed at the outer periphery of the first ring and extends obliquely and downwardly. The second terminal and the first terminal penetrate through the two holes respectively. The core is disposed in the coil and is accommodated in the accommodating chamber. Via the above arrangement, the vertical space of the present invention can be reduced so as to be made more compact.

Abstract: A multiple output magnetic induction unit includes a magnetic substrate, and a plurality of toroidal coils mounted on the magnetic substrate side by side. No insulating layer is required between the toroidal coils.

Abstract: A coil unit including an annular toroidal core, two coils wound over the toroidal core providing a bifilar winding, a winding-start positioning part, and a winding-end positioning part. The winding-start positioning part is adapted for making contact with a winding-start portion of the coils. The winding-end positioning part is adapted for making contact with a winding-end portion of the coils for regulating the positions of the winding-start portion and the winding-end portion relative to the toroidal core.

Abstract: A method of manufacturing a micro flux gate sensor and a micro flux gate sensor manufactured according to the method are provided. The method includes operations of forming a lower coil portion of an excitation coil and a magnetic field detecting coil on a wafer, forming connection portions with a certain height at predetermined positions of the lower coil portion, forming a first insulation layer to cover the lower coil portion and the connection portions, forming a magnetic core on the first insulation layer, forming a second insulation layer to cover the magnetic core and forming an upper coil portion electrically connected to the connection portions to form the excitation coil and the magnetic field detecting coil, and forming a third insulation layer to cover the upper coil portion.

Abstract: A communication transformer for power line communication includes a magnetic core, a plurality of transfer-purpose windings wound on the magnetic core, and an additional winding. The additional winding is wound on the magnetic core in such a manner that the additional winding is positioned between the plurality of transfer-purpose windings, and does not contribute in signal transfer operations. The communication transformer is arranged such that a half way portion of the additional winding along a length direction thereof is electrically connected to a constant potential.

Abstract: A core assembly for a surface mount electronic component includes a core fabricated from a magnetic permeable material and having a top surface, a bottom surface, and an outer side surface interconnecting the top and bottom surfaces. At least one coil termination clip is attached to the core, and the clip extends over at least two of the top surface, bottom surface, and outer side surfaces.

Abstract: A toroidal power transformer is disclosed. The toroidal power transformer comprises a circular core composed of plurality of laminated electrically conductive materials, a plurality of multi-layered first windings radially wound around the circular core, said winding arranged with an angular spacing of 2? and a number of windings in each winding layer is less than a number of windings in each previous layer, a multi-layered second winding radially wound around the circular core covering a corresponding one of said plurality of first windings, wherein the layers of each of said second windings are arranged to form a substantially triangular cross-section; and an insulating layer between each of said first and section windings.

Abstract: An inductor device or filter such as an electromagnetic interference (EMI) filter which includes an inductor provides cancellation of parasitic capacitance of the inductor and extends high frequency performance of the inductor or filter by providing the inductor using split windings and including capacitors to couple signals corresponding to those which are passed by the equivalent parallel capacitance of the inductor to another split winding or an inductor in the ground return path. Cancellation of parasitic capacitance is provided for differential mode and common mode split windings where the split windings may be either inductively coupled or not. Forming the split windings as a bifilar winding to increase coupling coefficient further improves performance and allows cancellation (as distinct from parasitic capacitance reduction) and avoidance of resonance in circuits in which an inductor is not permitted in the ground return path.

Abstract: A magnetic core portion 16, a residual base material portion 42, and a connecting portion 43 are formed by pressing from a base material 40. Notches 18A are formed at a peripheral edge of the magnetic core portion 16, which is bent in the direction of the plate thickness to form a temporary fixing portion 18. When base materials 40 are overlapped to cut the magnetic core portions 16 from the connecting portion 43, the magnetic core portions 16 are pressed in directions toward one another so that the temporary fixing portion 18 is filled between notches 18A in the other magnetic core portion 16, to fix temporarily the other magnetic core portions 16. Since the magnetic core portions 16 are temporarily and simultaneously fixed by pressing in a cutting step normally carried out, the magnetic core portions can be temporarily fixed with ease.

Abstract: A method for making an embedded toroidal inductor (118) includes forming in a ceramic substrate (100) a first plurality of conductive vias (102) radially spaced a first distance from a central axis (101) so as to define an inner circumference. A second plurality of conductive vias (104) is formed radially spaced a second distance about the central axis so as to define an outer circumference. A first plurality of conductive traces (110) forming an electrical connection between substantially adjacent ones of the first and second plurality of conductive vias is formed on a first surface (106) of the ceramic substrate. Further, a second plurality of conductive traces (110) forming an electrical connection between circumferentially offset ones of the first and second plurality of conductive vias is formed on a second surface of the ceramic substrate opposed from the first surface to define a three dimensional toroidal coil.

Abstract: An embedded core electrical transformer (120) for DC to DC current conversion at a switching frequency of 1 MHz has reduced volume and weight with increased power density. The electrical transformer (120) utilizes a plurality of conductive elements (132) disposed inside a hollow cavity (128) used to embed two magnetic cores (134, 136). The conductive elements (132) encircle three sides of the embedded cores (134, 136) and interface with a multilayer PCB (137) which includes conductive traces formed therein to encircle a fourth side of the embedded cores and to form primary and secondary winding circuits.

Abstract: The present invention provides an apparatus and method for measuring the conductivity of a fluid employing the differential radio frequency phase detection between two embedded toroidal coils.

Abstract: A mounting device for a toroidal core, preferably insertable into a toroidal core, has a catch device and thus fixable on a counterpart, as well as a support device for a toroidal core choke. The support device has at least one catch device on which mounting device can be fixed.

Abstract: Miniature circuitry and inductor components in which multiple levels of printed circuitry are formed on each side of a support panel, typically a printed circuit board or rigid flex. Magnetic members are embedded in one or more cavities in said support panel. Electrical connection between the plural levels of circuitry and multiple windings around the magnetic members are provided by plural plated through hole conductors. Small through hole openings accommodate a plurality of the plated through hole conductors since each is insulated from the others by a very thin layer of vacuum deposited organic layer such as parylene having a high dielectric strength. Adhesion of this plated copper to the organic layer is provided by first applying an adhesive promotor to the surface of the organic layer followed by the vacuum deposition of the organic layer.

Abstract: A component having an inductor to at least partially compensate for a capacitance in a circuit of the component, is described herein.

Abstract: Disclosed is a toroidal line filter with coils wound through various winding processes such that an inductance characteristic for a certain frequency can be improved through changes in current flowing direction and/or area, whereby the toroidal line filter can compensate for a poor EMI characteristic at the certain frequency without adding extra components such as an inductor or a capacitor. The toroidal line filter comprises an annular core and coils wound around the annular core. The coils are wound in such a way that first winding is wound over a predetermined partial area of the annular core, which is not the entire area of the annular core, and then second winding is wound over the remaining area of the annular core.

Abstract: An improved Rogowski coil is formed on a toroidal core made of a thermoplastic or other moldable material, the core having a preferably continuous groove or grooves extending around the core. The grooves correspond in size to magnet wire which registers within the grooves, thus controlling the specific location of the wires. The grooving may be helical. A return loop can be provided for return path cancellation, or a reverse winding can be added in a direction opposite to the direction of advancement of the main coil. In using the return loop, a resistive network can be added to improve the cancellation of the return path due to the effect of geometries. In addition, it can compensate for thermal and other variations.

Abstract: Methods and apparatus for electromagnetic components comprise a core and a winding. The core and winding are configured to provide smaller and more effective electromagnetic components.

Abstract: A transformer includes at least two magnetically coupled cores with a common axis. The cores have cross sectional configurations transverse to the common axis which are not rectangular. An exciting voltage is to be applied across a first winding provided on one of the cores. A second winding provided on one of the cores includes first and second terminals across which a voltage is to be induced in response to the exciting voltage. A first device provides a relatively higher impedance between the first and second terminals of the second winding. The first device is coupled between the first and second terminals. Third, fourth and fifth windings have respective first and second terminals. The third and fourth windings are wound on one of the cores with a first polarity. The fifth winding is wound on one of the cores with a second polarity opposite to the first polarity.

Abstract: Miniature circuitry and inductor components in which multiple levels of printed circuitry are formed on each side of a support panel, typically a printed circuit board or rigid flex. Magnetic members are embedded in one or more cavities in said support panel. Electrical connection between the plural levels of circuitry and multiple windings around the magnetic members are provided by plural plated through hole conductors. Small through hole openings accommodate a plurality of the plated through hole conductors since each is insulated from the others by a very thin layer of vacuum deposited organic layer such as parylene having a high dielectric strength. Adhesion of this plated copper to the organic layer is provided by first applying an adhesive promotor to the surface of the organic layer followed by the vacuum deposition of the organic layer.

Abstract: A conductivity sensor for measuring conductivity of a medium surrounding the conductivity sensor includes a first toroidal coil bounding a medium-receiving passageway and serving for inducing an electrical current in the medium, and a second toroidal coil also bounding the passageway and serving for registering a magnetic field produced by the electrical current. At least one of the toroidal coils has a plurality of first conductor segments, which extend in a plane of a multi-ply circuit board, a plurality of second conductor segments, which extend in a second plane of the circuit board, and a plurality of through-contacts, which connect the first conductor segments with the second conductor segments, wherein the first conductor segments, the second conductor segments and the through-contacts form, together, the windings of a toroidal coil.

Abstract: A current transformer assembly includes at least one Rogowski coil having a first closeable loop with an electrically conductive coil member and a first pair of terminals. An integrator unit has respectively a cable connected across the first pair of terminals of a respective Rogowski coil. Each respective Rogowski coil provides an output voltage received by the integrator assembly caused by when a respective electrical conductor on a phase of a multiphase circuit is arranged within an opening of the closeable first loop of the respective Rogowski coil, and provides an output signal proportional to a current in a conductor arranged in an opening of a Rogowski coil. At least one of the Rogowski coils includes an inline calibration unit for fast calibration and recalibration when retrofitting a monitor module that monitors a value of the current in one or more conductors.

Abstract: A device for electrical isolation is suitable for installation in the core hole of a toroidal core. The device includes a center section that has a rotational axis, and branches that extend outwards and that are deformable in the rotational direction about the rotational axis. Each branch has an insulating region that preferably extends in the radial direction and that is thicker than the branches.

Abstract: A toroidal core choke includes a toroidal core and an insulating part. The insulating part includes a separating device for separating winding spaces on the toroidal core. The separating device includes a divider and a spacer on an end of the divider.

Abstract: A method of manufacturing a micro flux gate sensor that has a good electrical connection and can be easily manufactured includes operations of forming a metal pattern, forming a first insulation layer to cover the metal pattern and forming viaholes to expose a certain portion of the metal pattern, applying an electrical signal through the metal pattern and plating the viaholes with a metal material to form a connection portion, forming a magnetic core on an upper portion of the first insulation layer, forming a second insulation layer to cover the magnetic core and forming an upper coil portion electrically connected to the connection portion to form the excitation coil and the magnetic field detecting coil, forming a third insulation layer to cover the upper coil portion, and removing a certain portion of the metal pattern to leave only the lower coil portion of the metal pattern.

Abstract: A coil unit including an annular toroidal core, two coils wound over the toroidal core providing a bifilar winding, a winding-start positioning part, and a winding-end positioning part. The winding-start positioning part is adapted for making contact with a winding-start portion of the coils. The winding-end positioning part is adapted for making contact with a winding-end portion of the coils for regulating the positions of the winding-start portion and the winding-end portion relative to the toroidal core.

Abstract: The invention includes a stacked open pattern inductor fabricated above a semiconductor substrate. The stacked open pattern inductor includes a plurality of parallel open conducting patterns embedded in a magnetic oxide or in an insulator and a magnetic material. Embedding the stacked open pattern inductor in a magnetic oxide or in an insulator and a magnetic material increases the inductance of the inductor and allows the magnetic flux to be confined to the area of the inductor. A layer of magnetic material may be located above the inductor and below the inductor to confine electronic noise generated in the stacked open pattern inductor to the area occupied by the inductor. The stacked open pattern inductor may be fabricated using conventional integrated circuit manufacturing processes, and the inductor may be used in connection with computer systems.

Abstract: A mounting device for a toroidal core, preferably insertable into a toroidal core, has a catch device and thus fixable on a counterpart, as well as a support device for a toroidal core choke. The support device has at least one catch device on which mounting device can be fixed.

Abstract: An embodied step-up toroidal transformer (100). The step-up toroidal transformer (100) includes a plurality of coil segments (102, 104, 106, 108). Each primary coil segment (102, 104, 106, 108) is separately comprised of a plurality of turns of an elongated conductor coiled around a toroidal shaped core (120). The plurality of primary coil segments (102, 104, 106, 108) are collectively disposed around a circumference defined by the toroidal shaped core (120). Each of the plurality of primary coil segments (102, 104, 106, 108) is electrically connected in parallel across a first primary input terminal (128) and a second primary input terminal (130). The step-up toroidal transformer (100) also includes a secondary winding (126) formed from a plurality of turns of a second elongated conductor coiled around the toroidal shaped core (136).

Abstract: A detector circuit to be used for measuring current and including a main current transformer and two substantially identical auxiliary current transformers, where magnetomotive forces are induced by a main current, said magnetomotive forces being counteracted by magnetomotive forces induced by a compensating current (i4) in a compensating winding (L4) across at least two annular cores (2, 3) at the same time as the two auxiliary current transformers are magnetized in antiphase by means of a modulation signal, said circuit further including a synchronous rectifier for providing an adjustment signal for the compensating current (i4). According to the invention, the compensating winding (L4) is formed by a so-called “pilgrim winding”.

Abstract: Shielded Rogowski coil systems having separate interface cables and methods for eliminating and monitoring noise in signal transmissions over the cables.

Abstract: A substrate is provided and a top interconnection metal layer and a primary winding layer are formed thereon. Then a passivation layer having a plurality of via exposed parts of the top interconnection metal layer is formed on the substrate. A secondary winding layer and at least a bonding pad are formed on the passivation layer. The bonding pad electrically connects to the top interconnection metal layer through the via.

Abstract: A method of assembling an inductive proximity sensor maintains inductive coil wound bobbins in fixed relation to an inductive core within a housing. The method includes configuring two inductive coil wound bobbins with an integral ledge cantilevered from an inside surface thereof for forming a pocket under the integral ledge at a bottom of each bobbin; disposing each inductive coil wound bobbin around a corresponding leg of the inductive core; containing a foot of each core leg into the pocket of the corresponding bobbin; inserting each of two legs of a thruster element into a corresponding bobbin so that each leg rests upon the ledge of the corresponding bobbin; disposing the inductive core, inductive coil wound bobbins, and thruster element into the housing; disposing a spring element on a top surface of the thruster element; and compressing the spring element against the top surface of the thruster element.

Abstract: Separable toroidal segments reduce the size of a sensing transformer that can be installed on an electrical conductor while connected to a device.

Abstract: The AC detection coil is a toroidal coil and includes plural radial-line conductors which are formed on a front face and a rear face of a substrate, conductive connection parts and conductive through-holes which connect electrically each end of radial-line conductors, wherein plural winding turns are consecutively formed by a connection of each radial-line conductor on the front and the rear faces, respectively, and include a forward coil and a backward coil, and each shape on the front and the rear faces of the radial-line conductors and the conductive connection parts are identical with each other. Consequently, when seen from a thickness direction of the substrate, areas of the forward coil and the backward coil are equal to each other, and an external, unneeded to be detected, magnetic field can be canceled each other by the forward coil and the backward coil, then a current detection accuracy can be improved.

Abstract: An insulating device includes two or more webs extending radially outwards and a plurality of elastic tongues connected to an end of at least one of the two or more webs. At least one of the two or more webs has an elastically deformable spring element. The insulating device is configured to fit into a core hole of a toroidal core.

Abstract: Miniature circuitry and inductor components in which multiple levels of printed circuitry are formed on each side of a support panel, typically a printed circuit board or rigid flex. Electrical connection between the plural levels of circuitry and multiple windings around magnetic members are provided by plural plated through hole conductors. Small through hole openings accommodate a plurality of the plated through hole conductors since each is insulated from the others by a very thin layer of vacuum deposited organic layer such as parylene having a high dielectric strength. Adhesion of this plated copper to the organic layer is provided by first applying an adhesive promotor to the surface of the organic layer followed by the vacuum deposition of the organic layer.