Abstract: A toroidal transformer core topology having improved thermal and electrical properties has a two part core, one part concentrically disposed within the other, with the windings wound between the two. Less expensive materials and less material can be used to construct the core. The core can be constructed using inexpensive and efficient methods.

Abstract: An energy storage coil comprises a core having an electrical conductor wound thereabout in a plurality of turns. The turns define a main zone and at least one first auxiliary zone extending along the core. The main zone has a first end and a second end. The turns in the main zone overlie one another. The first auxiliary zone is arranged adjacent to the first end of the main zone. The turns in the first auxiliary zone are arranged to provide the first auxiliary zone with lower parasitic capacitance from turn to turn than the main zone.

Abstract: A high-efficiency power supply transformer improved on its iron core which is a closed annular member made by continuous winding a silicon steel sheet and completed by sintering and fixing to keep directionality, after insulation processing with a heat shrinking wrapper on the core, a primary coil is formed by winding a wire annularly, then is enveloped by second time insulation processing with a heat shrinking wrapper; then a secondary coil is formed by winding a wire annularly and is enveloped by third time insulation processing with a heat shrinking wrapper; and pairs of end input wires of the primary and of the secondary coils extend outwards. With the core in the form of a closed annular member, its magnetic circuit is a closed magnetic circuit; hence its magnetizing energy and core consumption are 25% less than those of a conventional stacking type core and largely increase the efficiency of the power supply.

Abstract: The present invention provides an electromagnetic component formed from adjacent conducting layers of a multi-layer PCB and two additional conducting layers in contact with the PCB. The inventive component includes one or more winding turns formed by connecting the multiple layers of the multi-layer PCB with conductive vias and by connecting the additional conducting layers to respective top and bottom surfaces of the PCB. In one embodiment, one of the conducting layers is soldered to a top conducting layer of the PCB and the other of the conductive layers is soldered to a bottom conducting layer of the PCB, effectively increasing the cross-sectional area of the top and bottom winding layers. In another embodiment, the additional conducting layers are separated from the adjacent conducting PCB layers by a layer of insulation, permitting the additional conducting layers to form separate winding turns.

Abstract: The present invention provides a process and an apparatus for the preparation of a motor coil by which a longitudinally wound motor coil, so called, can be easily prepared. First, a molded product 10 comprising a column part 11, and a fin part 12 projected in the form of flat plate from an outer peripheral surface 11A, 11B, 11C, 11D of the column part to an outer side in a radial direction of the column part and helically continuing in an axis direction of the column part at predetermined intervals along the outer peripheral surface of column part is prepared. The column part 11 of the first molded product is punched out in an axis direction of the column part with retaining the fin part 12 to remove the column part, and the fin part 12 having helical shape left after the removal is coated with an insulating film.

Abstract: A precision printed circuit board based Rogowski coil is formed including a printed circuit board including a first layer and second layer. The printed circuit board further defines an aperture for receiving an electrical path therethough. A first return path is defined about the aperture on the first layer of the printed circuit board, and a second return path—parallel to the first return path—is defined about the aperture on the second layer of the printed circuit board. A plurality of radial paths defined on the first layer of printed circuit board extend between the aperture and the first return path. A plurality of radial paths defined on the second layer of the printed circuit board extend between the aperture and the second return path. Each first layer radial path is connected with an adjacent second layer radial path to form a generally toroidally-shaped winding.

Abstract: Method for forming a transformer (118) in a ceramic substrate. The method can include the steps of forming at least one conductive coil (119a, 119b) comprising a plurality of turns about an unfired ceramic toroidal core region (120a, 120b) defined within an unfired ceramic substrate (100). The method can also include the step of co-firing the unfired ceramic toroidal core region (120a, 120b), the unfired ceramic substrate (100), and the conductive coil (119a, 119b) to form an integral ceramic substrate structure with the conductive coil at least partially embedded therein.

Abstract: A method of making a resonant frequency tag which resonates at a predetermined frequency. The method involves providing a first conductive pattern having an inductive element and a first land and a second conductive pattern having a second land and a third land which are joined together by a link. The second conductive pattern is overlaid the first conductive pattern such that the second land is positioned over the first land. The third land is in electrical communication with the inductive element of the first conductive pattern. The formed resonant frequency tag is energized to determine if the tag resonates at the predetermined frequency. If the tag resonates properly, the third land is electrically coupled to the inductive element. If it does not, the second conductive pattern is adjusted so that overlapping portions of the first and second lands are changed, altering the capacitance to adjust the resonant tag frequency.

Abstract: A toroidal inductor, including a substrate (100), a toroidal core region (434) defined within the substrate, and a toroidal coil including a first plurality of turns formed about the toroidal core region and a second plurality of turns formed about the toroidal core region. The second plurality of turns can define a cross sectional area (440) greater than a cross sectional area (442) defined by the first plurality of turns. The substrate and the toroidal coil can be formed in a co-firing process to form an integral substrate structure with the toroidal coil at least partially embedded therein. The first and second plurality of turns can be disposed in alternating succession. The toroidal core region can be formed of a substrate material having a permeability greater than at least one other portion of the substrate.

Abstract: The invention relates to winding wire around a magnetic core. The invention includes forming corners on the wire that align with inside corners of the magnetic core such that the wire is more tightly wound around the magnetic core. The invention also includes pinching a portion of wire that is positioned on the internal diameter of a magnetic core when the wire is wound around the core to provide more turns of the wire around the magnetic core. A magnetic inductor made in accordance with the present invention can have increased inductance, lower temperature rise, smaller size, and exhibit less EMI noise than the prior art.

Abstract: A ring type current sensor has a C-shaped core and a magnetic sensor. An inner circumference of the core defines a detection field of a current. Both end faces in a circumferential direction of the core forms a gap therebetween. A cross-sectional area of the core perpendicular to the circumferential direction gradually increases from the both end faces to a portion opposite to the gap in a diametrical direction. A magnetic sensor is disposed in the gap. Preferably, the core is a stack of a plurality of core plates having different shapes.

Abstract: Toroidal transformer and inductor configurations are described that allow for greater heat transfer away from internal device components. The inventive transformer allows for higher thermal and electrical efficiency, as well as for more efficient use of expensive components, such as copper wire. In one embodiment, a toroidal transformer provides access for cooling air by forming the primary winding from a single layer of thick wire and a secondary winding of few turns such that most of the primary winding is exposed to air flow. In another embodiment, a heat sink is positioned between the core and primary windings to conduct heat away from the transformer.

Abstract: An apparatus and associated process for constructing a conductivity probe are disclosed. The conductivity probe includes at least two magnetic circuits in toroidal shape. Each of these “toroids” includes a ferrite core around which is wrapped a conductive wire (i.e., coil winding). To construct the conductivity probe, a toroid keeper having an upper annulus and a lower annulus separated by a spacer is provided. One of the two toroids is set on the upper annulus and the other toroid is set on the lower annulus. Connection leads extending from the coil wrappings of the toroids are routed from the keeper through wiring channels build into an elongated neck coupled to the keeper. The connection leads terminate at the distal end of the elongated neck relative to the keeper for connection to a controller.

Abstract: On a surface of a glass cloth adhered a mica layer sheet, a mixture of inorganic particles having a thermal conductivity of at least 5 W/mK, a resin, and a solvent is applied to form a layer of the mixture of the inorganic particles, the resin, and the solvent; the layer of the mixture is reduced in thickness using a doctor blade, followed by pressurizing to form a high thermally conducting layer; the mica layer sheet on which the high thermally conducting layer is disposed is cut to obtain a mica insulating tape; and the mica insulation tape is wound around a coil conductor. As a result, an insulated coil that is excellent in the voltage endurance characteristics and has a high thermal conductivity is manufactured.

Abstract: A high energy toroidal inductor addresses not only the desire for reduced weight and volume, but also the desire for minimal stray magnetic fields. Specifically, the high energy toroidal inductor includes a bucking cylinder and a predetermined number of leaves. Each leaf is of a two-ended, twisted ring configuration and includes a top portion. The top portion is the narrowest portion of the leaf, and the width of the leaf graduates outward from the top portion to each end of the ring. The bucking cylinder interfaces with each of the leaves and presents the leaves in a side-by-side, continuous toroidal configuration.

Abstract: An inductor integrated in a semiconductor device comprises a first and second lower electrical trace, an upper electrical trace, aligned at a first end with a first end of the first lower electrical trace and at a second end with a second end of the second lower electrical trace, a first via intercoupling the first end of the upper electrical trace with the first end of the first lower electrical trace, and a second via intercoupling the second end of the upper electrical trace with the second end of the second lower electrical trace.

Abstract: A current transformer includes a Rogowski coil, having an opening at the center in which a conductor penetrates, comprising, a printed circuit board having a plurality of layers forming at least first to fourth circuit board surfaces including a circuit board top surface, a circuit board bottom surface and circuit board conducting internal surfaces between the circuit board top surface and the circuit board bottom surface, a plurality of radial metal foils, each metal foil radiating from a center that is approximately the center of the opening, mounted on the first to fourth circuit board surfaces, a first winding formed by electrically connecting metal foils on the first and second circuit board surfaces with first plated through holes penetrating the first and second circuit board surfaces in a thickness direction of the printed circuit board, a second winding formed by electrically connecting metal foils on the third and fourth circuit board surfaces with second plated through holes penetrating the third a

Abstract: The invention relates to a noise suppressor unit for installing a common mode choke for a noise suppressor in a power source module onto a circuit board of the power source module, the module being arranged onto a circuit board of a plug-in unit. The noise suppressor unit includes a holder onto which the common mode choke for the noise suppressor of the power source module is arranged, at least one lifting element for an assembly head or the like of an automatic assembly machine for placing the noise suppressor unit onto the circuit board of the power source module with the automatic assembly machine or the like, and at least one surface mounting element for surface mounting the common mode choke for the noise suppressor onto the circuit board of the power source module.

Abstract: A method of making a resonant frequency tag having a predetermined frequency comprises forming a first conductive pattern comprising an inductive element and a first land having a first end connected to an inductive element end, and a second end spaced a predetermined distance from the first end; separately forming a second conductive pattern comprising a second land having a predetermined width and a link element; placing the second conductive pattern proximate the first conductive pattern at a first location wherein the second land overlies a portion of the first land with a dielectric therebetween establishing capacitive element plates having a first capacitance along with the inductive element forming a resonant circuit; measuring the resonant circuit frequency and comparing the measured and predetermined frequencies moving the second land along of the first land length to match the resonant frequency; and securing the second conductive pattern to the first conductive pattern.

Abstract: An inductor and a method of forming and the inductor, the method including: (a) providing a semiconductor substrate; (b) forming a dielectric layer on a top surface of the substrate; (c) forming a lower trench in the dielectric layer; (d) forming a resist layer on a top surface of the dielectric layer; (e) forming an upper trench in the resist layer, the upper trench aligned to the lower trench, a bottom of the upper trench open to the lower trench; and (f) completely filling the lower trench at least partially filling the upper trench with a conductor in order to form the inductor. The inductor including a top surface, a bottom surface and sidewalls, a lower portion of said inductor extending a fixed distance into a dielectric layer formed on a semiconductor substrate and an upper portion extending above said dielectric layer; and means to electrically contact said inductor.

Abstract: A method and apparatus for an air core reactor including a plurality of straight members and a plurality of offset members, the plurality of straight and offset members are interconnected to form an orthogonal spiral having an air core therethrough.

Abstract: An electrical machine has a core that includes stranded magnetically permeable material. The core is elongated to thereby define a lengthwise direction and a profile that is transverse to the lengthwise direction. Coils are wound about the core profile and sequentially disposed along the lengthwise direction. A magnet is adjacent to the core and movable relative to the core.

Abstract: A printed circuit board transformer has primary and secondary windings. The transformer includes a printed circuit board having a plurality of traces forming a plurality of first portions of the primary and secondary windings, an annular magnetic core adjacent to the printed circuit board, and a plurality of second portions of the primary and secondary windings. The second portions are formed from conductors enlacing the core.

Abstract: A self-leaded, surface mountable component package is provided for holding a wide variety of electrical components having widely variant conductor wire sizes in a manner achieving standardized conductor contact positioning. The general box-like configuration provides for component style variability and has a set of progressively stepped or tapered winding bosses to position and secure component conductors of multiple wire size, thereby ensuring proper registration with conductive traces of surface mount printed circuit boards and substrates.

Abstract: This invention relates to the fabrication of planar inductive components whereby the design in cross-section describes a conductor surrounded by magnetic material along the length of the conductor; an electrical insulator is placed between the conductor and the magnetic material. Cases also apply where more than one independent conductor is used. 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: 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: A magnetic circuit (1) with coil having an electric coil (2) and a magnetic core (3), the coil (2) comprising a conducting wire (6) and an end plate (4) and connector (5) being arranged at respective ends of the coil (2). The coil is mounted on the magnetic core (3) which is formed of a tore-shaped magnetic wire.

Abstract: A method and apparatus for an electronic component package of a passive component using wafer level processing is provided. Posts are formed on the active side of the substrate of an electronic component. A conductive layer leads the contact areas of the electronic component to the tops of the posts. The conductive layer on the top of the posts acting as leads, attaching to traces on a printed circuit board.

Abstract: An inductive device (10) comprises a magnetic core (16) including a portion of a plurality of wires (18), an electric winding (20) extending around said magnetic core, with one or more of the plurality of wires (18) at least partially encircling the electric winding (20) and having first and second end portions (26) arranged so as to form a gap (24) therebetween, and a flux coupling structure (28) disposed in a vicinity of the gap (24) so as to enhance coupling of magnetic flux between the first and second end portions (26).

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: 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: A magnetic device is provided that may be employed with surface mount technology. In an advantageous embodiment, the magnetic device includes a magnetic core having a magnetic core half and a springable winding positioned about at least a portion of the magnetic core half. The springable winding includes a terminus biased against the magnetic core half.

Abstract: A method of making a resonant frequency tag which resonates at a predetermined frequency. The method involves providing a first conductive pattern having an inductive element and a first land and a second conductive pattern having a second land and a third land which are joined together by a link. The second conductive pattern is overlaid the first conductive pattern such that the second land is positioned over the first land. The third land is in electrical communication with the inductive element of the first conductive pattern. The formed resonant frequency tag is energized to determine if the tag resonates at the predetermined frequency. If the tag resonates properly, the third land is electrically coupled to the inductive element. If it does not, the second conductive pattern is adjusted so that overlapping portions of the first and second lands are changed, altering the capacitance to adjust the resonant tag frequency.

Abstract: The invention relates to a fastening device for fastening a toroidal choking coil (1) to a base or the like, the toroidal choking coil comprising an inner circumference defined by a surface parallel with an axis of rotation of the toroidal choking coil and located closest to the axis of rotation. The toroidal choking coil further comprises an outer circumference defined by a surface parallel with the axis of rotation of the toroidal choking coil and located outermost from the axis of rotation, and side surfaces defined by surfaces perpendicular to the axis of rotation of the toroidal choking coil and connecting the inner circumference and the outer circumference.

Abstract: The invention relates to a fastening device for a toroidal choking coil for fastening a toroidal coil (1) to an electric device or a corresponding supporting base (13), the toroidal choking coil comprising an inner circumference defined by a surface parallel with an axis of rotation of the toroidal choking coil (1) and located closest to the axis of rotation, an outer circumference defined by a surface parallel with the axis of rotation of the toroidal choking coil (1) and located outermost from the axis of rotation, and side surfaces defined by surfaces perpendicular to the axis of rotation of the toroidal choking coil (1) and connecting the inner circumference and the outer circumference.

Abstract: A transformer for low frequency applications of from 50 Hz to 1000 Hz is described. The transformer comprises a core having a cylindrical symmetry around a main revolution axis. The core is formed of a soft isotropic magnetic composite material composed of iron and resin. Windings are enclosed in the magnetic core and disposed about a central column of the magnetic core and magnetically coupled with the inductor for low frequency applications, DC to 1000 Hz of similar construction is also described, the inductor comprises a core having a cylindrical symmetry around a main revolution axis. The core is formed of a soft isotropic magnetic composite material composed of iron and resin. Winding is enclosed in the magnetic core and disposed about a central column of the magnetic core and magnetically coupled with the magnetic core. The core is formed by core sections.

Abstract: The invention relates to a noise suppressor unit (1) for installing and mounting a common mode choke for a noise suppressor onto a circuit board (3). The noise suppressor unit (1) comprises a circuit board holder (7), onto which the toroid (4) is positioned, the toroid being coiled with at least two coils (5), the circuit board holder (7) comprising connecting plates (8), wherein one coil end (6) at the most is or more coil ends (6) are connected to each connecting plate (8) and wherein the connecting plates (8) are intended to be surface mounted to mounting surface areas in the circuit board (3), and wherein the connecting plates (8) are electrically insulated from each other, and lifting means (9) for an assembly head or the like of an automatic assembly machine for placing the noise suppressor unit (1) onto the circuit board (3) by the automatic assembly machine.

Abstract: A method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of flattened-ring compact bodies made of a magnetic material, arranging the plurality of flattened-ring compact bodies adjacently so that the axes of flattened through-holes of the flattened-ring compact bodies are vertically oriented, and firing the flattened-ring compact bodies while the powder is interposed between the adjacent flattened-ring compact bodies. Alternatively, a method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of thin compact bodies made of a magnetic material, vertically arranging the plurality of thin compact bodies adjacently, and firing the thin compact bodies while the powder is interposed between the adjacent thin compact bodies.

Abstract: A core assembly for a surface mount electronic component is provided. The core assembly comprises a core fabricated from a magnetic permeable material, and at least one conductive coil termination embedded within said core.

Abstract: A powder core is obtained by compaction-forming magnetic powder. The magnetic powder is an alloy comprising 1-10 wt % Si, 0.1-1.0 wt % O, and balance Fe. An insulator comprising SiO2 and MgO as main components is interposed between powder particles having a particle size of 150 &mgr;m or less.

Abstract: An inductor is wound axially around a cylindrical center structure, such as a core or form, so that each turn includes portions extending axially along a circumferential outer surface of the center structure and portions extending across the end surfaces of the center structure. Adjacent axial portions, which are preferably but not necessarily consecutive turns, carry current in the same direction to the extent possible. External magnetic fields therefore fall off rapidly and at least partially offset so that the inductor can handle high currents such as those relating to filtered electric power transmitted into a borehole for powering artificial lift equipment.

Abstract: A functional material—composite structural magnetic core is the magnetic core mainly consisting of magnetic material and having regular geometric form. It includes a box with a slot cavity and through hole. The inner magnetic core is installed inside the cavity of the box. It is characterized by: there are multiple inter-layers inside of the cavity of the slot. The inter-layers divide the slot cavity into the multiple continued ring slot and inside the ring slot many inner magnetic cores are installed respectively. The advantages are: wide application frequency band, large application temperature range, expanded electromagnetic compatibility. The continued stability and sudden change of the electromagnetic characteristics can meet requirements of the electronic technology. The sensing and sending of power transferred signal and control of noise wave etc. showed its composite excellent performance, corresponding and matching characteristics.

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: The invention relates to an end piece for magnetic coupling of core parts to a closed path for magnetic flux, characterized in that it comprises at least an abutment surface for abutment against the core parts and a magnetic path part, where the path part is composed of several approximately parallel, wire-shaped bodies and the abutment surface is composed of the end surfaces of the wire-shaped bodies. The invention also relates to a method for manufacturing the end piece.

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 toroidal core for a toroid, including at least two toroidal rings that are stacked co-axially one upon another. At least one of the two toroidal rings has a body including a gap that forms a break in one side of the body. The gap avoids saturation of the core.

Abstract: A method and corresponding structure having conductors fastened in an offset fashion to appropriately patterned traces on the PCB to surround a single magnetic core positioned on the surface of the printed circuit board so as to create an inductor coil. The inventive method and structure reduces component and manufacturing cost by providing substantially pie-slice shaped conductors shaped for efficient automated production since the inventive shaped conductors can be soldered in place during the reflow process for the entire printed circuit board. As a result, a low profile surface mounted inductor is provided. Flux leakage is also reduced compared to known magnetic core winding structures.

Abstract: A current transformer to be installed around a current-carrying conductor. The transformer has a split core with two parts, which can be opened to allow the transformer to be installed around or removed from the current-carrying conductor. A winding wound on the core is operatively connected to a switch so that the winding can be shorted prior to opening the split core when the transformer is removed from the current-carrying conductor in order to reduce the magnetic force holding the split core parts together. The winding is shorted by the switch prior to closing the split core parts when the transformer is installed around the conductor in order to minimize the damage to the core due to the induced magnetic force thereon. A mechanical tool is used to open or close the split-core parts. The switch can be linked to the tool for shorting and opening the winding.

Abstract: The invention relates to a coil arrangement with variable inductance having two separate toroid coils which carry working windings, and a control winding encompassing the two wound toroid coils for the purpose of pre-magnetizing the core material of the toroid coils.

Abstract: A balun transformer includes a coaxial transmission line terminating at one end with balanced terminals and terminating at another end with unbalanced terminals. At least two impedance segments are connected in series between the balanced terminals and the unbalanced terminals, each of the at least two impedance segments being formed by a magnetic core and at least one winding of the coaxial transmission line wound about the magnetic core.