58results about "Magnetic-bias transformers" patented technology

An Isolating Transmission Line Transformer (ITLT) for use in a data communications system is provided, the transformer comprising: a substantially planar substrate formed of electrically insulative material having opposed first and second surfaces; a first port formed of two separate terminals provided at one part of the substrate; a second port formed of two separate terminals provided at a second part of the substrate; a first conductor connected in series to the first port and arranged as a single loop; a second conductor which is electrically isolated from the first conductor and connected in series to the second port, the second conductor being arranged as a single loop in a substantially opposite orientation to the first conductor; wherein the first and second ports and at least part of the first and second conductors are provided on the substrate surface(s); and a core arranged between the first and second ports to cover the majority of the first and second conductors.

Shown and described is a coaxial transformer (17) with a coaxial cable (1) forming a primary winding (19) with an inner conductor (3) and a conductive cable shield (7), a secondary conductor (21) forming a secondary winding (23), at least one magnetic core (25), and an earth connection (11) that can be connected to a reference potential, wherein the primary and secondary windings (19, 23) are each arranged in relation to the magnetic core (25), wherein the earth connection (11) is electrically connected to the cable shield (7) so that the inner conductor (3) can be shielded by the cable shield (7). Also shown and described is a method (100) for producing a coaxial transformer (17).

A voltage-isolated transformer and integrated circuit package includes a substrate with opposed first and second surfaces and including a plurality of conductive traces, with a recess disposed in the second surface. The plurality of conductive traces includes a first group and a second group that are galvanically separate. A magnetic core is disposed on the first surface of the substrate. The magnetic core can include a soft ferromagnetic material. First and second coils are configured about the magnetic core and connected to the first and second groups of conductive traces, respectively, with the first and second coils and magnetic core being configured as a transformer. First and second integrated circuit die are disposed in the recess on the second surface. A dam is disposed on the first surface of the substrate and surrounding the magnetic core. An encapsulant disposed in the dam and encapsulating the magnetic core.

Galvanic insulation device (2) comprising: an upper coil (2a) extending into a first insulating layer (8); a lower coil (2b) extending into a second insulating layer (9); a galvanic insulation region (11) extending between the first (8) and the second (9) insulating layers; and at least a first conductive via (15; 18). Each of the upper coil (2a) and the lower coil (2b) comprises a respective plurality of turns (4; 5) and furthermore a respective first electrical contact region (4a; 5a) and a respective second electrical contact region (4b; 5b), electrically coupled to the respective plurality of turns (4; 5). The first conductive via (15; 18) is coupled to a first structural portion (28; 30) of the upper coil (2a) or the lower coil (2b), coupled to the respective turns (4; 5) or to the respective first (4a; 5a) or second (4b; 5b) electrical contact region. The first structural portion (28; 30) comprises a first stress dissipation region (24; 26) having a curved shape and having a first end (24'; 26') misaligned along a first axis (Z) with respect to the other of the upper coil (2a) and the lower coil (2b).

Aspects of the present disclosure include systems, structures, circuits, and methods providing integrated circuit (chip) packages or modules having a transformer that is disposed or mounted on or to a side of the lead frame opposite to the related semiconductor dies of the chip package. The transformer may be placed on a PCB structure. In some examples, an insulating coating may be placed on the package to increase the isolation capability of the final package. The packages and modules may include various types of circuits; in some examples, chip packages or modules may include a galvanically isolated gate driver or other high voltage circuit.

The invention relates to a planar transformer with improved reliability. A galvanic insulation device includes: an upper coil in a first insulating layer; a lower coil in the second insulating layer; a current insulating region extending between the first insulating layer and the second insulating layer; and a first conductive via. Each of the upper coil and the lower coil includes a turn, a first electrical contact region and a second electrical contact region electrically coupled to the turn. A first conductive via is coupled to the first structural portion of the lower coil (2b), to the turn or to the first or second electrical contact area. The first structural portion includes a first stress dissipation region having a curved shape and not aligned with the upper coil.

To provide an RF filter that allows RF power to be provided to a heating element in an RF electrode without ingress.SOLUTION: A radio frequency (RF) filter includes an inductive element having a plurality of coil sections collectively forming a non-split coil of a cable of a twisted magnetic wire. The coil sections have different winding pitches. The cable of the twisted magnetic wire is configured for at least one channel, with two wires per channel. The cable of the twisted magnetic wire is connected at a first end to an electrical component that is to receive power from a power source, and the cable of the twisted magnetic wire is connected at a second end to a power source. A terminating capacitive element is electrically connected between a reference ground potential and each wire of the cable of the twisted magnetic wire at a respective location between the second end of the inductive element and the power source.SELECTED DRAWING: Figure 6

A high-power telescoped transformer can be used to provide efficient power conversion in an electric vehicle (EV) fast charger. The telescoped transformer includes a pair of concentric toroidal magnetic cores, with a primary set of windings that wraps around both cores and a secondary set of windings that wraps around one of the cores. By using a shorter total length of wire for the windings, resistive power losses are reduced, compared with conventional transformer and inductance combinations. This also results in a reduced volume of the EV fast charger. Multiple transformer modules can be coupled in series to form a high power EV charger.

A current transformer for a ground fault circuit breaker (GFCI) may include an iron core having a closed loop shape, the iron core having a first side, a second side, and an iron core opening, and a sense coil wound around the iron core, the sense coil configured to be magnetically coupled to a plurality of conductors passing through the iron core opening. The current transformer may include a first magnetic shield disposed on a first side of the core over the sense coil, and a second magnetic shield disposed on a second side of the core over the sense coil.

A transformer component (1) comprises at least one winding (2) being formed by a single turn of a wire (5) having a wire insulation ( 6 ), and a molded body (4), in which the wire (5) including the wire insulation (6) is at least partially embedded.

The invention relates to a signal transmission circuit (1) for an analog current signal in an explosion-proof area, comprising: - a transformer (2) with one or more primary-side coils (4, 4a, 4b) and one or more secondary-side coils (6, 6a, 6b) which are coupled via a transformer yoke (J) in a common magnetic circuit; - a control circuit (10) which is designed to control the voltage across the one or more secondary-side coils (6, 6a, 6b) to zero by providing a compensation current for flux compensation, wherein the control variable corresponds to a measuring voltage which is one of: o obtained as a function of a voltage across a measuring coil (8) arranged in the magnetic circuit;and o is obtained as a function of a voltage across one of the plurality of secondary coils (6a, 6b) in the magnetic circuit when it is de-energized, wherein the analog current signal to be transmitted corresponds to or depends on the compensation current.;

This insulation module is provided with: a first conductor and a second conductor, which are buried in an insulating layer so as to face each other at a distance in the thickness direction of the insulating layer; a first electrode which is connected to the first conductor; a second electrode which is connected to the second conductor, while being arranged at a position that is away from the first electrode when viewed from the thickness direction of the insulating layer; a passivation layer which is formed on the surface of the insulating layer; a low dielectric constant layer which is formed on the surface of the passivation layer, and has a lower dielectric constant than the passivation layer; and a mold resin which covers the low dielectric constant layer.

The pulse receiving circuit (221) constituting the signal transmission device (200) includes: a first pulse detector (221E) that receives a differential input between a first received pulse signal (S3), i.e., an internal signal (s21) at the secondary winding (231s) of the first transformer (231), and a second received pulse signal (S4), i.e., an internal signal (s22) at the secondary winding (232s) of the second transformer (232); a second pulse detector (221F) that receives a differential input between the first received pulse signal (S3) and the second received pulse signal (S4), wherein the input polarity is opposite to the input polarity of the first pulse detector (221E); and a logic unit (221H) that generates a received pulse signal (S5) based on the output signals (s23, s24) of the first and second pulse detectors (221E, 221F), respectively.

An example apparatus includes a first die having a first terminal. The apparatus includes a second die having a second terminal. The apparatus includes an isolation channel coupled between the first terminal of the first die and the second terminal of the second die. The apparatus includes control circuitry disposed on the first die, the control circuitry to cause transmission of a power signal over the isolation channel and at least one of cause transmission of a control data signal over the isolation channel or detect a feedback data signal over the isolation channel. Other examples are described.

A balun includes an unbalanced terminal; balanced terminals; first and second main lines; and first and second sub-lines. The first main line has an end connected to the unbalanced terminal. The second main line has an end connected to the first main line and an end that is open. Each of the first and the second sub-lines is connected between the balanced terminal and a reference potential, respectively. The second sub-line includes a first partial line connected to the balanced terminal, and a second partial line connected between the first partial line and the reference potential. The second main line includes a third partial line connected to the first main line, and a fourth partial line connected to the third partial line. The distance between the first partial line and the third partial line is shorter than the distance between the second partial line and the fourth partial line.

An electrical system includes an insulating substrate; a magnetic coupler comprising coils disposed on opposites sides of the insulating substrate, wherein the coils are at least partially aligned such that a magnetic field generated by current flow through a first of the coils induces an electromotive force in a second of the coils; and a capacitive coupler having plates disposed on opposites sides of the insulating substrate, wherein the plates comprises elongate conductors that are coupled together without forming loops and arranged at least partially beneath or in an interior of the coils of the magnetic coupler on the insulating substrate

According to one embodiment, an isolator includes first and second electrodes, first and second insulating portions, and a first dielectric portion. The first insulating portion is provided on the first electrode. The second electrode is provided on the first insulating portion. The second insulating portion is provided around the second electrode along a first plane perpendicular to a first direction. The second insulating portion contacts the second electrode. The first dielectric portion is provided between the first and second insulating portions. At least a portion of the first dielectric portion contacts the second electrode and is positioned around the second electrode along the first plane. A distance between a lower end of the second electrode and a first interface between the first dielectric portion and the second insulating portion is less than a distance between the first interface and an upper end of the second electrode.

The invention relates to a signal transmission circuit (1) for an analog current signal in an explosion-proof area, comprising: - a transformer (2) with one or more primary-side coils (4, 4a, 4b) and one or more secondary-side coils (6, 6a, 6b) which are coupled via a transformer yoke (J) in a common magnetic circuit; - a control circuit (10) which is designed to control the voltage across the one or more secondary-side coils (6, 6a, 6b) to zero by providing a compensation current for flux compensation, wherein the control variable corresponds to a measuring voltage which is one of: o obtained as a function of a voltage across a measuring coil (8) arranged in the magnetic circuit;and o is obtained as a function of a voltage across one of the plurality of secondary coils (6a, 6b) in the magnetic circuit when it is de-energized, wherein the analog current signal to be transmitted corresponds to or depends on the compensation current.;

To provide a composite coil device capable of facilitating automation of winding work and having stable quality at a low cost.SOLUTION: A composite coil device includes: a winding shaft part containing at least part of a magnetic substance and formed with a first partition and a second partition in an axial direction; a first conductor part continuously wound around the first partition and the second partition; and a second conductor part wound around the second partition.SELECTED DRAWING: Figure 6

Galvanic insulation device includes an upper coil in a first insulating layer; a lower coil in a second insulating layer; a galvanic insulation region extending between the first and the second insulating layers; and a first conductive via. Each of the upper coil and the lower coil includes turns, a first electrical contact region and a second electrical contact region, electrically coupled to the turns. The first conductive via is coupled to a first structural portion of the lower coil (2b), coupled to the turns or to the first or second electrical contact region. The first structural portion includes a first stress dissipation region having a curved shape and misaligned to the upper coil.

According to one embodiment, an isolator includes first and second electrodes, first and second insulating portions, and a first dielectric portion. The first insulating portion is provided on the first electrode. The second electrode is provided on the first insulating portion. The second insulating portion is provided around the second electrode along a first plane perpendicular to a first direction. The second insulating portion contacts the second electrode. The first dielectric portion is provided between the first and second insulating portions. At least a portion of the first dielectric portion contacts the second electrode and is positioned around the second electrode along the first plane. A distance between a lower end of the second electrode and a first interface between the first dielectric portion and the second insulating portion is less than a distance between the first interface and an upper end of the second electrode.

A packaged multichip isolation device includes leadframe including a first and second die pad, with a first and second lead extending outside a molded body having a downward extending lead bend near their outer ends. A first integrated circuit (IC) die on the first die pad has a first bond pad connected to the first lead that realizes a transmitter or receiver. A second IC die on the second die pad has a second bond pad connected to the second lead that realizes another of the transmitter and receiver. An isolation component is in a signal path of the isolation device including a capacitive isolator, or inductors for transformer isolation on or between the die. A midpoint of the thickness of the die pad is raised above a top level of the leads and in an opposite vertical direction relative to the downward extending bend of the external leads.

This application provides an isolation transformer. The isolation transformer is applicable to a power converter, the power converter further includes a first power conversion module and a second power conversion module, the isolation transformer includes a high-voltage winding, a low-voltage winding, and a solid insulation housing, the high-voltage winding is connected to the first power conversion module, and the low-voltage winding is connected to the second power conversion module. The high-voltage winding has a solid insulation layer, a conducting layer or a semi-conducting layer is disposed on the solid insulation layer, and the conducting layer or the semi-conducting layer is grounded. The solid insulation housing has an opening surface, the opening surface faces the second power conversion module, the solid insulation housing covers the low-voltage winding and the high-voltage winding that has the solid insulation layer, a conducting layer or a semi-conducting layer is disposed on the solid insulation housing, and the conducting layer or the semi-conducting layer of the solid insulation housing is grounded. In this application, a volume of the isolation transformer can be reduced, power density of the power converter can be improved, and low costs and high applicability can be ensured.

The present disclosure relates to an insulating jacket for a top coil of an isolation transformer. A micro-isolator is described. The micro-isolator may include a first isolator element, a second isolator element, and a first dielectric material separating the first isolator element from the second isolator element. The second dielectric material may fully or partially encapsulate the second isolator element, or may be present at an outer corner of the second isolator element. The second dielectric material may have a larger band gap than the first dielectric material, and its construction may reduce electrostatic charge injection into the first dielectric material. The micro-isolator may be formed using microfabrication techniques.

Described herein are on-chip isolator devices that can be employed in high-power applications and that are designed to enhance high common-mode transient immunity (CMTI) without sacrificing isolator gain. An isolator device includes two dies. A first die supports an isolation barrier and the second die is barrierless. The second die is barrierless in that it lacks isolation materials that are commonly used to sustain isolation barriers in on-chip isolator devices (e.g., polyimide). To enhance CMTI despite the absence of a further isolation barrier formed on the second die, the second die is provided with a tapped impedance element, an impedance element having a tap that couples the impedance element to a reference potential (e.g., to ground). The secondary side of the isolator of the first die is coupled to the tapped impedance element of the second die, thus creating a discharge path for common-mode transients.

A transformer is formed of a twisted-wire bundle wound as a single layer with wires of the bundle comprising wires insulated with extruded plastic insulation at least 0.001 inch thick. A magnetic material is disposed within the transformer with at least a portion within the coil having either solenoid or toroid shape. In embodiments, the transformer is formed by twisting wires into a twisted wire bundle; winding the twisted wire bundle into a single-layer coil; placing the single-layer coil into a form; injecting a powdered magnetic material suspended in a polymer into the coil; curing, or hardening, the polymer; and connecting wires of the twisted wire bundle to form transformer windings.

This insulating transformer includes: a transformer including an insulating layer, a first coil that is embedded in the insulating layer, has a first signal end and a first ground end, and is configured to be capable of applying low voltage to the first signal end, and a second coil that is arranged separated from the first coil in a thickness direction of the insulating layer, has a second signal end and a second ground end, and is configured to be capable of applying high voltage to the second signal end; a capacitor including a first capacitor electrode that is disposed between the first coil and the second coil and is connected to the first ground end of the first coil, and a second capacitor electrode that is disposed between the first capacitor electrode and the second coil and is connected to the second ground end of the second coil; a first insulating film interposed between the first coil and the first capacitor electrode; and a second insulating film interposed between the second coil and the second capacitor electrode.