Abstract: A noncontact power-transmission coil is provided. The noncontact power-transmission coil includes a planar coil and a magnetic layer. The planar coil is formed by winding a linear conductor in a spiral shape substantially in a single plane. The magnetic layer is formed by applying a liquid-form magnetic solution in which magnetic particles are mixed with a binder solvent, so as to cover one planar portion of the planar coil and a side-face portion of the planar coil.

Abstract: A method is provided for producing windings for a dry-type transformer with in each case one winding for the low voltage (LV winding) and one for the high voltage (HV winding). The LV and HV windings are each electrically insulated from one another and have layers which are electrically insulated from one another by virtue of, initially, the winding for the low voltage being produced from electrically conductive wire or tape material and an insulating layer including resin-impregnated fibre material. Prior to the application of the HV winding, the maximum insulating thickness for the layer insulation and the number of fibre rovings corresponding to this insulating thickness can be determined, and each winding layer and the associated insulating layer can be produced simultaneously with a physical offset with respect to one another.

Abstract: An embedded inductor and a method for forming an inductor are described. Spaced apart first stripes are formed substantially parallel with respect to one another as part of a first metal layer. First contacts, second contacts, and third contacts in respective combination provide at least portions of posts. Spaced apart second stripes substantially parallel with respect to one another and to the first stripes are formed as part of a second metal layer located between the first metal layer and the second metal layer. The first stripes, the posts, and the second stripes in combination provide turns of a coil.

Abstract: A wiring assembly having a conductor positioned about an axis in a helical-like configuration to provide a repetitive pattern which rotates around the axis. In one embodiment, when a current passes through the conductor, a magnetic field having an orientation orthogonal to the axis changes direction as a function of position along the axis.

Abstract: Certain embodiments described herein are directed to induction devices comprising an oxidation resistant material. In certain examples, the induction device comprises a coil of wire that is produced from the oxidation resistant material. In some examples, the oxidation resistant induction device can be used to sustain an inductively coupled plasma in a torch.

Abstract: A magnetic element includes a conducting winding structure, first and second magnetic parts, and first and second side posts. The first and second magnetic parts have first and second central posts that are aligned with each other. The first side post is disposed on an edge of the first or second magnetic part. The second side post is disposed on another edge of the first or second magnetic part where no side post is disposed or the first side post is not aligned with. The conducting winding structure is sandwiched between the first and second magnetic parts. The first and second side posts are aligned with corresponding edges wherein no side post is disposed. Consequently, the overall height of the first and second central post is less than the height of the first or second side post and an air gap is defined between the first and second central post.

Abstract: Provided is an electronic device that includes an LTCC inductor including a first sheet disposed on a substrate and including a first conductive pattern, a second sheet disposed on the first sheet and including a second conductive pattern, and a via electrically connecting the first conductive pattern to the second conductive pattern, and a spacer disposed on a lower surface of the first sheet to provide an air gap between the substrate and the first sheet, wherein the first conductive pattern is exposed out of the lower surface of the first sheet.

Abstract: A transformer for reducing the electromagnetic interference (EMI) effect is disclosed. The transformer includes a bobbin; a magnetic core assembly partially sleeved by the bobbin; a first primary winding coiled around the bobbin; a secondary winding coiled on the first primary winding; and a first shielded element disposed between the first primary winding and the secondary winding for disconnecting the EMI transmission from the first primary winding to the secondary winding. The first primary winding includes a first winding portion and a second winding portion, and the first winding portion has larger EMI comparing to the second winding portion. The first winding portion of the first primary winding is adjacently disposed to the magnetic core assembly for shielding the EMI of the first primary winding by using the magnetic core assembly.

Abstract: An inductor includes a core formed of a magnetic material and a foil winding wound at least partially around or through at least a portion of the core. A first end of the winding extends away from the core to form an extended output tongue configured and arranged to supplement or serve as a substitute for a printed circuit board foil trace. A second end of the winding forms a solder tab. At least a portion of the extended output tongue and the solder tab are formed at a same height relative to a bottom surface of the core. Another inductor includes a core formed of a magnetic material, a winding wound at least partially around or through at least a portion of the core, and a ground return conductor attached to the core. The core does not form a magnetic path loop around the ground return conductor.

Abstract: An electrical power system may comprise a power source, an electrical load and an interconnection path between the power source and the electrical load. At least one power-source current transformer may be positioned at the power source. At least one remote current transformer may be positioned remotely from the power-source current transformer so that a portion of the interconnection path is between the power-source and the remote current transformer. A control circuit may be interposed between the power-source and remote current transformers and may be responsive to current imbalance between the power-source and remote current transformers to disconnect the power source from the electrical load in the event of such imbalance. The at least one power-source current transformer may comprise a secondary winding having first and second ends, and a resistor connected across the first and second ends.

Abstract: A multilayer insulated electric wire, containing: a conductor; and extruded insulation layers; wherein an outermost layer (A) is composed of an extruded layer containing a thermoplastic polyester-series resin composition which contains 75 to 95 mass parts of a polyester resin other than a liquid crystal polyester, and 5 to 25 mass parts of a liquid crystal polyester, wherein an innermost layer (B) and at least one insulating layer (C) between the outermost and innermost layers each are composed of an extruded layer containing a thermoplastic polyester resin, in which an entirety or a part of the thermoplastic polyester resin is formed by allowing an aliphatic alcohol component and an acid component to cause polycondensation, and in which the number of carbon atoms of the aliphatic alcohol component is 2 to 5.

Abstract: A winding assembly for a transformer includes a wire winding and a sheet winding. The wire winding includes a spirally wound insulated wire and the sheet winding includes a metallic winding sheet that forms a single turn winding. Instead of winding the wire winding on a bobbin, sleeve or the like, the wire winding is attached directly to a surface of the winding sheet by means of a self-bonding technique.

Abstract: Sensor for measuring electrical parameters in a high voltage environment comprising a high voltage side (4) for connection to high voltage conductors, a low voltage side (6) for connection to low voltage power supply and measurement signal control circuitry, a measurement signal circuit (16), and a power supply circuit (14), and at least one isolating transformer (18, 20) for transmission of electrical power supply and/or measurement signals between the low voltage side and the high voltage side. The isolating transformer comprises at least a first and a second transformer core (28), a transformer coil (33) on a circuit board around a branch (27) of the transformer core on the high voltage side and a transformer coil (32) on a circuit board around a branch (29) of the transformer core on the low voltage side, the isolating transformer further comprising an intermediate coil (36) encircling at least one branch of each said at least two transformer cores.

Abstract: A power converter including a power train, a controller and a driver. The power train includes a switch that conducts for a duty cycle and provides a regulated output characteristic for the power converter, and a micromagnetic device interposed between the switch and the output of the power converter. The micromagnetic device includes a substrate, and a magnetic core layer formed over the substrate from a magnetic alloy including iron, cobalt and phosphorous. A content of the cobalt is in a range of 1.8 to 4.5 atomic percent. A content of the phosphorus is in a range of 20.1 to 30 atomic percent. A content of the iron is substantially a remaining proportion of the magnetic alloy. The controller provides a signal to control the duty cycle of the switch. The driver provides a drive signal to the switch as a function of the signal from the controller.

Abstract: A coil module comprises a circular core and a winding is provided. The circular core comprises an outer circular portion and an inner circular portion. The winding is wound around the outer circular portion in a single-layer configuration and around the inner circular portion in a multi-layer configuration. The coil module comprises a first thickness after the winding is wound around the outer circular portion and comprises a second thickness after the winding is wound around the inner circular portion, wherein the first thickness is greater than or equal to the second thickness.

Abstract: Low-cost, high performance woven conductors and associated inductive apparatus, and methods for manufacturing and utilizing the same. In one embodiment, an eight (8) conductor wiring strand is used that results in a pattern in which a given conductor resides, on average, at an equal position throughout the braid grouping as any other conductor within the wire strand over a given length. Such a configuration enhances coupling among the conductors, which minimizes deleterious parasitic effects such as leakage inductance and distributed capacitance. Segmented woven wiring strands are also disclosed which are composed of both woven and non-woven portions. Examples of devices which can utilize the woven conductors include, without limitation, bobbins or other formers, headers, encapsulated electronic packages, modular jacks, form-less inductive devices and transmission lines.

Abstract: A biased gap inductor includes a first ferromagnetic plate, a second ferromagnetic plate, a conductor sandwiched between the first ferromagnetic plate and the second ferromagnetic plate, and an adhesive between the first ferromagnetic plate and the second ferromagnetic plate, the adhesive comprising magnet powder to thereby form at least one magnetic gap. A method of forming an inductor includes providing a first ferromagnetic plate and a second ferromagnetic plate and a conductor, placing the conductor between the first ferromagnetic plate and the second ferromagnetic plate, adhering the first ferromagnetic plate to the second ferromagnetic plate with a composition comprising an adhesive and a magnet powder to form magnetic gaps, and magnetizing the inductor.

Abstract: A transformer 10 has a first core CR1, a second core CR2, a first transformer primary winding W1, a coil 45, a coil 46 and a coil 47. The second core CR2 is integrally formed with the first core CR1. The first transformer primary winding W1 is wound onto the first core CR1. The coil 45 is wound onto the first core CR1 and forms a transformer T1 together with the first transformer primary winding W1. The coil 46 is wound around the first core CR1 and forms a transformer T2 together with the first transformer primary winding W1. The coil 47 is connected to the coil 45 and coil 46 and forms an output coil using the second core CR2 as a magnetic core.

Abstract: The present invention provides a power transmission transformer of which workability in implementing and reliability of connection are considered in a noncontact power transfer device using individual self-oscillation circuits. The power transmission transformer for a noncontact power transfer device including a transmitting coil L1 and a drive coil L2 for self-oscillation on a power transmission device side includes a bobbin in which the transmitting coil and the drive coil L2 are disposed, in which the transmitting coil and the drive coil L2 are configured by an air-core coil using self-bonding wire, and the bobbin 1 includes a winder spindle 1a, 1b on both surfaces opposed to each other across a collar 2 formed of a flat plate, and a mating portion 3 for mating with an external portion in an end portion of the winder spindle 1b, and the drive coil L2 is mounted on the winder spindle 1b and the transmitting coil L1 is mounted on the other, opposed winder spindle 1a across the collar.

Abstract: A multi-winding inductor includes a first foil winding and a second foil winding. One end of the first foil winding extends from a first side of the core and wraps under the core to form a solder tab under the core. One end of the second foil winding extends from a second side of the core and wraps under the core to form another solder tab under the core. Respective portions of each solder tab are laterally adjacent under the magnetic core. A coupled inductor includes a magnetic core including a first and a second end magnetic element and a plurality of connecting magnetic elements disposed between and connecting the first and second end magnetic elements. A respective first and second single turn foil winding is wound at least partially around each connecting magnetic element. Each foil winding has two ends forming respective solder tabs.

Abstract: A wiring assembly having a conductor positioned about an axis in a helical-like configuration to provide a repetitive pattern which rotates around the axis. In one embodiment, when a current passes through the conductor, a magnetic field having an orientation orthogonal to the axis changes direction as a function of position along the axis.

Abstract: A pulse transformer arrangement (100) is built from an uncut pulse transformer core (110) and at least one foil winding (120-A, 120-B) (each) comprising multiple insulated conducting strips arranged around the core and ending in foil winding terminals to form multiple independent primary windings. This new design principle has several advantages. Making the winding(s) of foil eliminates the need to cut the core, because of the ease of insertion of the foil winding(s) onto the core. The work to set up a plurality of primary windings is significantly reduced. In addition to the elimination of the costs for cutting the core, this also brings the further advantages of reduced DC reset current, reduced risk for electrical shorts and avoidance of excessive losses due to potential high frequency AC resistance problems.

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. A width of the divider is less than a width of the spacer.

Abstract: A transformer has a coil including a plurality of layers of wound conductive material and layers in between made of wound insulation material. The layers of insulation material are wound in stages. The layers of insulation material are applied at an angle to the winding axis of the coil.

Abstract: A multilayer printed circuit board (“PCB”) coil that simulates a coil formed from litz wire. The PCB includes a plurality of alternating conductor and insulating layers interconnected to cooperatively form the coil. Each conductor layer includes a trace that follows the desired coil shape and is divided into a plurality of discrete conductor segments. The segments are electrically connected across layers to provide a plurality of current flow paths (or filaments) that undulate between the layers in a regular, repeating pattern. The coil may be configured so that each filament spends a substantially equal amount of time in proximity to the paired coil and therefore contributes substantially equally to the self or mutual inductance of the coil. Each conductor layer may include a plurality of associated traces and intralayer connector that interconnected so that each filament undulates not only upwardly/downwardly, but also inwardly/outwardly in a regular, repeating pattern.

Abstract: Disclosed is an electronic component, especially a coil with a coil core, in which the turns of the coil winding are spaced apart from each other at least at one point in the longitudinal direction of the coil. A plastic retaining element which overlaps both the coil core and at least the two adjacent turns of the coil winding in a longitudinal direction is sprayed on in the area of said point, whereby a connection between the coil core and the coil winding is created at the same time. The retaining element can be sprayed around a closed circumference of the coil while covering only a portion of the coil in the longitudinal direction thereof. Preferably, the retaining element is placed approximately in the center relative to the longitudinal extension of the coil.

Abstract: An electromagnetically excitable coil having a wire, the wire being wound around a wire holder in one winding direction, the wire having a winding start, which generally is disposed at a first end of the coil, and a winding end, which generally is disposed at the same end of the coil, using an uneven number of winding layers, the coil having an elongated cross-section and the cross-section having a longer side and a shorter side, the wire being routed from the second end of the coil to the first end of the coil while forming at least one wire crossing at the shorter side of the cross-section.

Abstract: Generally, a low-profile planar core structure for use in magnetic components and related processes are presented herein. More specifically, the planar core structure provides a relatively large winding area that reduces heat dissipation, reduces leakage inductance, and allows for a low-profile design. The planar core structure has a center core that is elongated along a horizontal axis. Furthermore, conductors may enter and exit the planar core structure without increasing its height.

Abstract: A wire material includes at least two branch structures disposed so as to be continuous with each other, each of the branch structures including a conductor and a pair of branching conductors connected to the conductor. The branching conductors may be connected to a front surface and a back surface of an end of the conductor. The conductors may be in the form of a foil.

Abstract: Primary (4, 8) and secondary (10) windings are subjected to a significant heat stress during operation of a high voltage transformer. The present invention describes a high voltage transformer which is believed to have good temperature properties. This transformer may have a planar primary winding and a Litz secondary winding. The planar primary winding may abut against a planar face of the core (2) therefore allowing for a good heat exchange between these two elements. The Litz secondary winding and the planar primary winding may be cooled by means of a cooling medium.

Abstract: An electronic circuit has an inductor. The inductor comprises a first number of electrically conductive tracks (108, . . . ) in, or on, a substrate (105). The tracks are separated from one another. The inductor comprises a second number of electrically conductive wires (120, . . . ). The ends of each wire contacts two different ones of the tracks. Among the first number of tracks there is at least a specific track that is electrically isolated from the wires upon the wires having been connected. Such an inductor can be made using a standardized track configuration on a substrate, and selectively skipping one or more tracks in order to determine the inductance.

Abstract: A coil component has a first core with a winding core portion, a second core with a winding core portion, a first coil wound on the winding core portion of the first core, and a second coil wound on the winding core portion of the second core. A part of the first coil is wound on the winding core portion of the second core. The first core and the second core are arranged as magnetically separated from each other.

Abstract: Core structures that may be used in transformers to improve the number of turns-ratios available. The core structures may include at least three outer legs and a center leg. In operation windings of the transformer may be wrapped around the center leg (e.g., using a bobbin) a fractional number of times, such that the turns-ratio of the transformer may be more finely selected without increasing the number of turns required. Additionally, the outer legs may have different cross-sectional areas, such that even more fractional turns-ratios are available.

Abstract: An AC neutral bus electromotive power rectification unit includes a first coil unit and a second coil unit. The first coil unit includes a first conductive wire coil having a first end and an opposite second end. The conductive coil is disposed in a first non-conductive tube and is suspended in a ferrous matrix. The second coil unit includes a second conductive wire coil having a first end and an opposite second end. The first end of the second coil unit is electrically coupled to the first end of the first coil unit. The second coil unit is disposed in a second non-conductive tube and is surrounded by a non-conductive material.

Abstract: The present invention provides a method for forming a photosensitive polyimide pattern 38 on a metal conductor 32, comprising carrying out the following steps (A) to (E) in this order: (A) a step of forming an ester bond type photosensitive polyimide precursor layer 33 by applying an ester bond type photosensitive polyimide precursor composition onto the metal conductor 32; (B) a step of forming an ion bond type photosensitive polyimide precursor layer 34 by applying an ion bond type photosensitive polyimide precursor composition onto the precursor layer 33 until the thickness of the precursor layer 34 reaches a desired thickness; (C) a step of exposing through a mask 35 and transferring the mask pattern as a latent image 36 onto the precursor layers 33 and 34; (D) a step of developing; and (E) a step of forming a polyimide pattern 38 by curing the developed precursor layers 33 and 34.

Abstract: A three-phase, multi-winding includes a core, the core including a hub and an outer shell around a perimeter of the hub. wherein the hub and the outer shell are in a fixed position with respect to each other. The core also includes multiple slots. In addition to the core, the multi-winding device includes a primary winding positioned in at least two of the slots; and multiple spatially distributed secondary windings, wherein at least one of the secondary windings is positioned proximate the primary winding in at least one of the two slots.

Abstract: The invention relates to an inductance coil, in particular an inductance coil without an iron core for use in electric power grids, comprising at least two cylindrical winding layers (1), which are disposed concentrically with respect to a coil central axis (7) and are connected electrically in parallel. The inductance coil comprises at least one means for reducing or minimizing sound emissions produced during the operation of the inductance coil. At least the outermost winding layer (1) is designed in this case as a current-conducting, acoustic shield winding (18) opposite the winding layer (1) adjacent in the direction of the coil central axis (7), wherein the shield winding (18) is dimensioned electrically such that it is designed for the transmission of a current intensity, which is only a fraction of the current intensity, to be transmitted by the adjacent winding layer (1).

Abstract: A transformer winding having a conductor wound in a plurality of turns is disclosed, wherein the transformer winding includes a reinforcing part arranged at a winding transition in a manner so that the reinforcing part covers more than 180 degrees of the conductor circumference, whereby the bending strength of the conductor at the location of the reinforcing part is increased. The resistibility of the transformer winding against bending stress is hence improved.

Abstract: A common-mode choke coil includes a magnetic core, external electrodes, first and second wires, and a magnetic top. The magnetic core includes a winding core section and first and second flange sections. The external electrodes are provided on the first and second flange sections. The first wire is directly wound around the winding core section. The second wire is wound around the outside of the first wire. The first turn of the second wire is wound while being in contact with the first turn of the first wire and the first flange section.

Abstract: A meander inductor is disclosed, the inductor is disposed on a substrate or embedded therein. The meander inductor includes a conductive layer composed of a plurality of sinusoidal coils with different amplitudes and in series connection to each other, wherein the sinusoidal coils with different amplitudes are laid out according to a periphery outline. The profile of the meander inductor is designed according to an outer frame range available for accommodating the meander inductor and is formed by coils with different amplitudes. Therefore, under a same area condition, the present invention enables the Q factor and the resonant frequency fr of the novel inductor to be advanced, and further expands the applicable range of the inductor.

Abstract: An isolation magnetic device produced by inserting a first end of a wire through a first hole of a core, wrapping the first end of the wire around a first side of the core and inserting the first end of the wire through a second hole of the core. The second hole of the core is spaced from the first hole and has a longitudinal axis extending parallel to a longitudinal axis of the first hole. The device is further produced by inserting a second end of the wire through the second hole of the core, wrapping the second end of the wire around the first side of the core and inserting the second end of the wire through the first hole of the core.

Abstract: A vehicular power converter includes switches and first and second inductive components. The first and second inductive components have substantially adjacent portions and are coupled to the plurality of switches such that when current flows from the plurality of switches and through the first and second inductive components, flux generated by the current flowing through the adjacent portions of the first and second inductive components and located between the adjacent portions is oriented in substantially opposite directions.

Abstract: A magnetic pole for magnetic levitation vehicles is described which pole comprises a core (1) and a winding (16) applied on it in form of a disc which is formed by a conductor strip (17) wound in several layers (10a) . . . 10k) around said core (1). According to the present invention, the conductor strip (17) is properly tailor-cut at its longitudinal rims (17a, 17b) so that its width increases from said core (1) towards the outside until it reaches a maximum value (b2).

Abstract: An apparatus for cost-effective and efficient cooling of an active element. The active element may be a magnetic element such as an inductor or a transformer having windings and a core. A thermally conductive vessel has a cavity that is adapted to conform to a surface of the active element, with a small gap remaining between the surface of the active element and the surface of the cavity. The winding is adapted to have a uniform surface, by utilizing an edge winding or a machined winding fabricated from an extruded tube. A thermally conductive encapsulant fills gaps in the apparatus to further improve cooling.

Abstract: A ripple reduction circuit for use in a current doubler rectifier has first and second inductors coupled via a first coupling coefficient. The first and second inductors generate a first and a second ripple current, respectively. A third inductor is coupled to the first and second inductors; and an impedance is connected in series with the third inductor, wherein the circuit generates a third ripple current opposing the combination of the first and second ripple currents generated by the first and second inductors.

Abstract: A rectangular coil unit 1 is manufactured in such a manner that four wires 2 are simultaneously regularly wound on four outer surfaces of a bobbin 3 having a rectangular section so that the wires 2 advance obliquely together for a lane change corresponding to 0.5 wire on one (a lower surface side) of a pair of parallel surfaces of the four outer surfaces of the bobbin 3 and for a lane change corresponding to 3.5 wires on the other one (an upper surface side) of the parallel surfaces.

Abstract: A vacuum cast or “solid” transformer coil assembly and a method of manufacturing thereof are provided. A solid transformer coil assembly, according to an embodiment of the invention, includes a dielectric substrate, the coil windings provided around the substrate, and an epoxy compound encapsulating the substrate and the coil windings. The substrate is provided with raised “buttons” comprising the same epoxy material as the epoxy compound used for encapsulation. The buttons maintain a specific distance between the coil and the dielectric substrate. The buttons are arranged such that they support the windings and allow the encapsulating epoxy to flow around them flooding the entire mold without entrapping air or creating voids.

Abstract: A rectangular coil unit is manufactured in such a manner that two wires are simultaneously regularly wound on four outer surfaces of a bobbin having a rectangular section so that the wires advance obliquely together for a lane change corresponding to 0.5 wire on one (a lower surface side) of a pair of parallel surfaces of the four outer surfaces of the bobbin and for a lane change corresponding to 1.5 wires on the other one (an upper surface side) of the parallel surfaces.

Abstract: The invention is directed to inter-helix inductor devices. The inter-helix inductor device includes a dielectric substrate. An input end is disposed on the first surface of the dielectric substrate. A clockwise winding coil has one end connecting to the input end and at least one winding turn through the dielectric substrate. A counter clockwise winding coil includes at least one winding turn through the dielectric substrate, wherein the clockwise and counter clockwise winding coils are connected by an interconnection. An output end is disposed on the dielectric substrate, connects one end of the counter clockwise winding coil, and is adjacent to the input end.

Abstract: An integrated circuit device includes: a main interconnect; and a coil located on one side of the main interconnect at a position fixed with respect to the main interconnect, the coil having a central axis extending in a direction crossing the extending direction of the main interconnect. An induction current detectable by the coil is generated due to a current flowing through the main interconnect.