69results 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.

To provide an isolator which allows improvement in reliability.SOLUTION: An isolator comprises a first electrode, a second electrode, a conductor, and a first insulation layer. The second electrode is provided above the first electrode and is spaced apart from the first electrode. Along a first surface perpendicular to a first direction from the first electrode to the second electrode, the conductor is provided around the first electrode and the second electrode. The first insulation layer is provided on the second electrode and contains silicon, carbon, and nitrogen.SELECTED DRAWING: Figure 1

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.;

A semiconductor device has a semiconductor substrate, a first insulating layer, a first inductor, a second insulating layer, a second inductor, a pad and an annular wiring. The first insulating layer is formed on the semiconductor substrate. The first inductor is directly formed on the first insulating layer. The second insulating layer is formed on the first insulating layer such that the second insulating layer covers the first inductor. The second inductor is directly formed on the second insulating layer such that the second inductor faces the first inductor. The pad is directly formed on the second insulating layer. The pad is electrically connected with the second inductor. The annular wiring is electrically connected with the pad. The annular wiring is spaced apart from the second inductor. The annular wiring surrounds the second inductor without forming a vertex in plan view.

A pulse receiving circuit constituting a signal transmission device includes a first pulse detector that receives a differential input between a first reception pulse signal, i.e. an internal signal at a secondary winding of a first transformer and a second reception pulse signal, i.e. an internal signal at a secondary winding of a second transformer; a second pulse detector that receives the differential input between the first reception pulse signal and the second reception pulse signal with input polarity reversed to that of the first pulse detector; and a logic unit that generates a reception pulse signal based on output signals of the first and second pulse detectors, respectively.

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

A pulse receiving circuit 221 configuring a signal transmission device 200 comprises: a first pulse detector 221E which receives a differential input between a first received pulse signal S3 (= internal signal s21) appearing in a secondary winding 231s of a first transformer 231 and a second received pulse signal S4 (= internal signal s22) appearing in a secondary winding 232s of a second transformer 232; a second pulse detector 221F which receives a differential input between a first received pulse signal S3 and a second received pulse signal S4 with an input polarity opposite to that of the first pulse detector 221E; and a logic unit 221H which generates a received pulse signal S5 on the basis of the respective output signals s23 and s24 of the first pulse detector 221E and the second pulse detector 221F.

A digital communication station includes a coupled inductor, driver circuitry, and a digital transceiver. The coupled inductor includes (1) a first winding connected between a first digital communication node and a first power node, (2) a second winding connected between a second digital communication node and a second power node, and (3) a third winding. The driver circuitry is configured to drive the third winding to increase respective inductance values of the first and second windings, and the digital transceiver is communicatively coupled to the first digital communication node and the second digital communication node.

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.

Aspects of the present disclosure include systems, structures, circuits, and methods providing integrated circuit (IC) packages (500) or modules having a transformer (520) with first and second spiral coils (504, 506) disposed on or adjacent to a substrate (502), each including one or more coil portions on one or multiple levels and having varying distances to an aperture or coil-origin region. A portion (512c) of a soft ferromagnetic core (512) of the transformer can pass through the aperture (A) or be adjacent to the coil origin region (A). The IC packages and modules may include various types of circuits; in some examples, IC packages or modules may include a galvanically isolated gate driver or other high voltage circuit.