Abstract: An inductor device includes a first trace, a second trace, a first capacitor, and at least one connection element. The first trace includes at least two sub-traces. One terminal of the at least two sub-traces is coupled to a first node. The second trace includes at least two sub-traces. One terminal of the at least two sub-traces is coupled to a second node. The first capacitor is coupled between the first node and the second node. The at least one connection element is coupled to another terminal of the at least two sub-traces of the first trace and another terminal of the at least two sub-traces of the second trace, such that the first trace and the second trace form a closed loop.

Abstract: A dry-type transformer with an elliptical iron core includes a transformer housing, a heat dissipation mechanism, an elliptical iron core, a coil, a clamping mechanism and an upper cover. The heat dissipation mechanism is arranged in a horizontal direction and fixedly assembled with the transformer housing. One end, away from the transformer housing, of the heat dissipation mechanism is in contact with ground. The elliptical iron core is arranged in a vertical direction inside the transformer housing. The coil is wound on the elliptical iron core. The clamping mechanism is sheathed on one side, away from the elliptical iron core, of the coil. The upper cover is arranged at a top end of the transformer housing, and the upper cover is fixedly assembled with the transformer housing via a bolt structure.

Abstract: A coil electrode of a coil component includes a plurality of lower wiring patterns arranged on a lower surface of an insulating layer; a plurality of upper wiring patterns arranged on an upper surface of the insulating layer; a plurality of inner conductors disposed at an inner peripheral side of the coil core, each inner conductor connecting one end of the corresponding one of the lower wiring patterns and one end of a corresponding one of the upper wiring patterns forming the pair with the lower wiring pattern; and a plurality of outer conductors disposed at an outer peripheral side of the coil core, each outer conductor connecting the other end of the corresponding one of the lower wiring patterns and the other end of the corresponding one of the upper wiring patterns adjacent to an upper wiring pattern forming the pair with the lower wiring pattern.

Abstract: An integrated magnetic element is provided, including a first magnetic-core frame, three second magnetic-core frames, and three coil windings. The first magnetic-core frame has a first side pillar and a second side pillar opposite to the first side pillar. The three second magnetic-core frames are arranged on the side corresponding to the first side pillar of the first magnetic-core frame, and are arranged in parallel with the axis of the first side pillar of the first magnetic-core frame. Each of the second magnetic-core frames has a first side pillar adjacent to the first side pillar of the first magnetic-core frame, and a second side pillar opposite to the first side pillar of itself. The three coil windings connect to a three-phase grid, and wind around the first side pillar of the first magnetic-core frame and the corresponding first side pillar of the second magnetic-core frame respectively.

Abstract: A magnetic integrated hybrid distribution transformer includes a main transformer, a series isolation transformer and a converter, wherein: an iron core includes an iron beam unit, an iron yoke unit and a leakage magnetic core unit. The main transformer includes secondary windings, primary windings and control windings all of which are layer-windings and wound around main transformer iron beams. The series isolation transformer includes converter side windings and grid side windings all of which are pancake-windings and wound around isolation transformer iron beams. The converter side windings and the control windings are respectively connected with the converter by the star connection with neutral point. Leakage magnetic cores are respectively inserted between the primary windings and the control windings or between the converter side windings and the grid side windings, so as to achieve magnetic integration design of the transformer and output connection inductor of the converter.

Abstract: A circuit comprises a power source, an Open Loop Reactance Matching Circuit Control Signal Generator (OLRMCCSG), an Open Loop Reactance Matching (OLRM) circuit, and a load. The power source supplies an input voltage and an input current used to drive the load. The load is an inductive type load or a capacitive type load. If the power source operates as a voltage source, then the OLRMCCSG uses input voltage information to control the OLRM circuit to generate a reactance matching voltage that is phase delayed with respect to the input voltage. If the power source operates as a current source, then the OLRMCCSG uses input current information to control the OLRM circuit to generate a reactance matching current that is phase delayed with respect to the input current. The reactance matching voltage or the reactance matching current causes the input voltage and the input current to be in phase.

Abstract: A magnetic component includes a main magnetic core, a power winding coupled to the main magnetic core, a variable reluctance core element arranged in a flux path of the main magnetic core and including a saturable magnetic core and a control winding coupled to the saturable magnetic core. The control winding is isolated relative to the power winding and configured to selectively saturate a section of the saturable magnetic core.

Abstract: An output high power transformer, including a primary and a secondary in galvanic isolation forming a flyback converter, wherein the primary includes at least one primary winding having at least two primary turns and a rectifier including a junction diode circuit; the secondary includes at least one secondary winding having at least one secondary turn; and the flyback converter includes at the primary at least one metal-oxide-semiconductor field-effect transistor (MOSFET), notably a Silicon Carbide MOSFET, and at the secondary at least one Silicon Carbide diode.

Abstract: Inductor designs and methods are provided. An inductor can include a first core and a second core. The first core can be larger than the second core and the second core can be seated within the inner diameter of the first core. A first and a second wire can be provided that each wrap around the first core and the second core. The first core can have less windings than the second core.

Abstract: First and second coils are disposed coaxially with a gap provided therebetween and are configured to mutually cancel out magnetic fields provided thereby. A receptacle portion that defines a space traversing at least a portion of a magnetic flux produced by the coils is provided, and a magnetic powder is contained in the receptacle portion so as to occupy a portion of the space. The magnetic powder moves within the space, and this movement produces a change in the magnetic flux. This change in the magnetic flux appears in the form of a change in the inductance value.

Abstract: The invention relates to a combined transformer for an LLC resonant converter. The combined transformer includes a primary transformer winding configured to generate during operation a first magnetic flux, which forms a first magnetic circuit. The combined transformer also includes a resonant inductor having a winding, wherein the resonant inductor is configured to generate during operation a second magnetic flux, which forms a second magnetic circuit. The primary transformer winding and the winding of the resonant inductor are arranged with respect to one another such that at least one first part of the first magnetic circuit and at least one second part of the second magnetic circuit run on a magnetic path common to the first part and to the second part. The invention also relates to an LLC resonant converter with such a combined transformer.

Abstract: A wireless power transmission system comprising a wireless transmitter capable of transmitting power and a wireless receiver capable of receiving power such that the transmitter or receiver comprises a controller and resonant tank, and the resonant tank comprises a capacitor and an electrically tunable inductor.

Abstract: An air core reactor (47) including a plurality of concentric conductor winding packages (44, 46) wherein a force (F+) generated by the interaction of current (+) flowing through one package and a magnetic field (42) generated by the reactor is out of phase (F?) with a force generated in another package, thereby effectively mitigating audible sound generated by power operation of the reactor. In one embodiment (FIG. 3), the out of phase force may be generated when at least one winding (38c, 37d) of one package (38) is configured to conduct a current (?) that is at least 10 degrees out of phase with a current (+) conducted by another package (40) or other windings (38a, 38b) of the reactor (36).

Abstract: A power supply apparatus including a first magnetic core, a second magnetic core having a shape symmetrical to a shape of the first magnetic core, a third magnetic core between the first and second magnetic cores, a first coil wound around at least one of the first and third magnetic cores, and a second coil wound around at least one of the second and third magnetic cores, wherein a material for the third magnetic core is different from a material for the first magnetic core or the second magnetic core.

Abstract: The invention relates to a power transformer with electronic components. The aim of the invention is to arrange the energy supply of the electronic components of a power transformer closer to the components and thus eliminate the disadvantages of the prior art. According to the invention, a stray field collector is brought into a stray field of the power transformer, whereby a voltage is generated.

Abstract: A method and structures for implementing an adjustable size ferrite core for electromagnetic interference (EMI) cable noise suppression. A plurality of ferrite core segments are mated together defining an adjustable size cable receiving cavity. Each of the ferrite core segments includes an inner wall portion with mating fingers extending along adjoining edges. The mating fingers are selectively positioned together to select a size of the adjustable cable receiving cavity.

Abstract: An inductive device includes an inductor having an inductance associated therewith, and a tuning ring disposed around the inductor. The tuning ring has an inductance associated therewith, wherein the tuning ring is coupled to the inductor to establish a mutual inductance between the tuning ring and the inductor. The inductance of the inductor, the inductance of the tuning ring, and the mutual inductance between the tuning ring and the inductor contribute to a total inductance of the inductive device. The tuning ring is configurable, and is selectively configured to achieve a certain value for the mutual inductance, and a certain value for the inductance of the tuning ring, without changing a footprint of the tuning ring.

Abstract: A transformer and a liquid crystal display apparatus having the transformer are provided. The transformer includes a bobbin having at least one first winding section, at least one second winding section, and at least one core insertion groove formed therein. The transformer also includes at least one coil wound around the first winding section and the second winding section with at least one core inserted into the core insertion groove.

Abstract: The invention relates to a step switch provided with a preselector and a polarity circuit, a separate polarization resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarization resistances can be connected continuously or via separate polarity switches.

Abstract: A magnetic fault current limiter core (10a) comprising at least one first magnetic element (12) and at least one second magnetic element (14), the magnetic elements (12,14) being arranged to define a substantially parallel array of magnetic elements (12,14), the or each first magnetic element (12) including a soft magnetic material and the or each second magnetic element (14) including a hard magnetic material, wherein the or each soft magnetic material in a non-saturated state has a higher magnetic permeability than the or each hard magnetic material.

Abstract: A contactless charging system is made up of an electronic device and a contactless charger 200 that recharges the electronic device in a contactless manner. The electronic device transmits a full charge command indicating completion of charge. Upon receipt of the full charge command, the contactless charger shifts to a charge stop state in which charge of the electronic device is not performed. In the charge stop state, the contactless charger generates a load check signal for checking whether or not the electronic device is placed in the contactless charger in a rechargeable state, and transmits the signal. Further, the contactless charger also generates a charge restart check command for checking whether or not the electronic device requests recharge in a charge stop state, and transmits the command.

Abstract: A balancing circuit for a metal detector. The metal detector includes an oscillating power source, a transmit coil connected to the oscillating power source, first and second receive coils inductively coupled to the transmit coil, a first amplitude balancing circuit connected to the first receive coil, and a first phase balancing circuit connected to the first receive coil. The first phase balancing circuit includes a capacitor and a variable resistor.

Abstract: An integrated tunable inductor includes a primary inductor having a plurality of inductor turns, at least one closed loop eddy current coil proximate the primary inductor, and at least one variable resistor integrated in series with the eddy current coil.

Abstract: An M-winding coupled inductor includes a first end magnetic element, a second end magnetic element, M connecting magnetic elements, and M windings. M is an integer greater than one. Each connecting magnetic element is disposed between and connects the first and second end magnetic elements. Each winding is wound at least partially around a respective one of the M connecting magnetic elements, and each winding has a respective leakage inductance. The coupled inductor further includes at least one top magnetic element adjacent to and extending at least partially over at least two of the M connecting magnetic elements to provide a magnetic flux path between the first and second end magnetic elements. The top magnetic element forms a gap. The inductor may be included in an M-phase power supply, and the power supply may at least partially power a computer processor.

Abstract: A variable inductor includes: a first inductor having two ends connected to a first terminal and a second terminal; a second inductor having two ends connected to the first terminal and the second terminal; a first node provided on the first inductor; a second node provided on the second inductor; and a switch element that switches between a conductive state and a non-conductive state between the first node and the second node.

Abstract: An electric reactor of controlled reactive power is formed by a magnetic core, and at least one primary winding to which a main current is supplied to generate a main magnetic flow on the magnetic core. The reactor also includes at least a generator of the magnetic distortion field to which a control current is supplied to generate a field of magnetic distortion on the magnetic core. The magnetic distortion field is opposed to the main magnetic flow generating a distortion of the latter, achieving a change in the magnetic core reluctance and in this way a change in the reactive power of consumption of the reactor. In addition, a method is described to adjust the reactive power in an electric reactor.

Abstract: An electromagnet having at least one access port oriented perpendicularly to the electromagnet's central axis. The magnet has a conventional helical winding along its central axis. However, at some point along the length of the axis, the pitch of the helical winding is greatly increased in order to create a region with a comparatively low turn density. One or more ports are provided in this region. These ports provide access from the magnet's central bore to the magnet's exterior. A sample can be placed in the central bore near the ports. A beam traveling down the central bore, or through one of the radial ports, will strike the sample and be scattered in all directions. The ports allow access for instrumentation which is used to evaluate the scattered beam.

Abstract: There is disclosed a permanent current switch which has a high temperature margin and which is thermally stable and which securely performs a switching operation between a superconducting state and a normal conducting state. The permanent current switch of the present invention has a coiled superconducting wire and a heater wire which switches the superconducting wire between the superconducting state and the normal conducting state, the superconducting wire is a magnesium diboride superconducting wire having a high-resistance metal on an outer side and a magnesium diboride superconducting portion on an inner side and prepared by forming a superconducting metal on a layer between the high-resistance metal and the magnesium diboride superconducting portion, and the permanent current switch further comprises a superconductive connecting section superconductively connected to a lead wire guided from the superconducting wire and a superconducting wire for a wiring line.

Abstract: The electrically tunable inductive device includes an electromagnet including an electromagnet core and a bias or tuning coil cooperating therewith to define opposing magnetic poles for generating a quiescent magnetic field that may be varied. An inductor is tunable based upon the variable magnetic field and includes an inductor core having a toroidal shape and fixed at a position adjacent the opposing magnetic poles of the electromagnet, and an inductor or signal coil is around at least a portion of the inductor core. The electromagnet core may include a pair of opposing legs and a bight portion therebetween defining a horseshoe shape. The inductor core may be positioned between ends of the opposing legs of the electromagnet core, and the tuning coil may surround the bight portion of the electromagnet core. The electrically tunable inductive device may have the combination of fine precision, high speed and high power handling, useful for tunable RF filters.

Abstract: An embodiment of a coupled-inductor core includes first and second members and first and second forms extending between the first and second members. The first form has a parameter (e.g., length) of a first value, and is operable to conduct a first magnetic flux having a first density that depends on the first value of the parameter. The second form is spaced apart from the first form, has the parameter (e.g., length) of a second value different from the first value, and is operable to conduct a second magnetic flux having a second density that depends on the second value of the parameter. Because two or more of the forms of such a core may have different values for the same parameter, the core may be suitable for use in a multiphase power supply where the currents through the phases are unbalanced.

Abstract: A variable inductor according to the present invention includes a control winding, two windings constituting a primary winding, and a magnetic core. The magnetic core includes a center leg and two outer legs disposed so as to sandwich the center leg, wherein the control winding is disposed around the center leg, and the two winding as the primary winding are disposed around the two outer legs, respectively. The control winding is shifted in location with respect to the two winding as the primary winding in the longitudinal direction of the legs thereby providing a sufficient spatial isolation therefrom, thus ensuring a sufficient withstand voltage between the control winding and the primary winding.

Abstract: According to various aspects, exemplary embodiments are provided of current chokes suitable for use in DC to DC converters. For example, a current choke may include a ferrite body with at least one pair of laterally spaced-apart interior conductors disposed lengthwise within the body. A first pair of end terminations may be disposed on a first end of the body and connected to the interior conductors, and a second pair of end terminations may be disposed on a second end of the body and connected to the interior conductors. A nonmagnetic dielectric may be disposed within the body laterally between the interior conductors. The nonmagnetic dielectric may be configured to control magnetic coupling between the at least one pair of interior conductors so that the current choke is operable with a coefficient of magnetic coupling between the interior conductors of less than about 0.90.

Abstract: A DC-DC converter suitable for multiple converter circuit topologies is disclosed. The DC-DC converter utilizes magnetic feedback of the output load current to provide broad inductance control of a magnetic element, while inhibiting saturation of the switched winding or windings of the magnetic element.

Abstract: Use, as a component with variable inductance which is a function of the current passing through it, of an inductive superconductive component having at least two terminals and comprising at least one line segment working with said terminals and integrating at least one of these terminals, this line segment constituting a conductive or superconductive layer within a stack of films alternately superconductive and insulating.

Abstract: An electric reactor of controlled reactive power is formed by a magnetic core, and at least one primary winding to which a main current is supplied to generate a main magnetic flow on the magnetic core. The reactor also includes at least a generator of the magnetic distortion field to which a control current is supplied to generate a field of magnetic distortion on the magnetic core. The magnetic distortion field is opposed to the main magnetic flow generating a distortion of the latter, achieving a change in the magnetic core reluctance and in this way a change in the reactive power of consumption of the reactor. In addition, a method is described to adjust the reactive power in an electric reactor.

Abstract: Methods and apparatus that employ a coil-less magnetoelectric flux switch arrangement to repeatedly switch magnetic flux from at least one permanent magnet for the purposes of generating motive force and/or electrical energy.

Abstract: Methods and apparatus that employ a coil-less magnetoelectric flux switch arrangement to repeatedly switch magnetic flux from at least one permanent magnet for the purposes of generating motive force and/or electrical energy.

Abstract: Methods and structures for constructing a magnetic core of a coupled inductor. The method provides for constructing N-phase coupled inductors as both single and scalable magnetic structures, where N is an integer greater than 1. The method additionally describes how such a construction of the magnetic core may enhance the benefits of using the scalable N-phase coupled inductor. The first and second magnetic cores may be formed into shapes that, when coupled together, may form a single scalable magnetic core. For example, the cores can be fashioned into shapes such as a U, an I, an H, a ring, a rectangle, and a comb, that cooperatively form the single magnetic core.

Abstract: A control system, method and apparatus is provided for an orthogonally variable inductor. A method and apparatus is also provided for voltage regulation. Regulation is provided without the use of Silicon devices, such as FET's, in the output current path. Efficient voltage regulation is provided via varying the inductance of a device in the output current path, and alternatively via varying the inductance and duty cycle. An orthogonal inductive device is provided to vary the inductance in the output current path. The orthogonal inductive device is an external H field device, a series method orthogonal flux device, or a combined core device. Furthermore, a variable inductor is also provided in filters, amplifiers, and oscillators.

Abstract: A transformer for substantially matching the impedance of a generator and a load, which is coupled to the generator via a transmission line. The transformer comprises an outer conductor having an inner surface and an inner conductor having an outer surface that is positioned within the outer conductor. The transformer further includes a plurality of transformation sections, where each section provides a particular separation distance between the inner surface of the outer conductor and the outer surface of the inner conductor to yield a particular characteristic impedance for each of the plurality of transformation sections, thereby substantially matching the impedance of the generator to the load.

Abstract: A voltage regulator controls an output of an automotive alternator by controlling an amount of excitation current supplied to a field winding of the alternator. The amount of the excitation current is sensed by a sensing resistor as a sensed voltage appearing across the sensing resistor. The sensed voltage is amplified by an amplifier to obtain a detected voltage, an amplifying factor of which is adjusted based on an reference voltage precisely corresponding to the amount of the excitation current, and thereby the detected voltage is equalized to the reference voltage. In this manner, the excitation current is precisely detected without mechanically adjusting a resistance of the sensing resistor by function-trimming or the like.

Abstract: A fault current limiter (FCL) comprises: an air core flat clock spiral inductor comprising wound electrically conductive material and insulated turns; and two terminations configured for attaching the spiral inductor in series with a power carrying conductor.

Abstract: A bead inductor has excellent productivity and increased reliability in the connection between an internal conductor and external terminals. A method for manufacturing such a bead inductor includes the steps of forming an internal conductor and the external terminals as an integral, unitary member such that the external terminals are disposed at both ends of the internal conductor and electrically connected thereto; positioning the integral, unitary member in a metallic mold; and molding a resin material or a rubber material including a powdered magnetic substance in the metallic mold so as to embed the internal conductor therein.

Abstract: A variable inductor with a saturable core having three legs, including a center leg and two outer legs. A control winding is wound on the center leg and two outer windings are connected in parallel and wound on the outer legs. The inductances of the windings on the outer legs vary with the current through the control winding. The current through the control winding varies the saturation level of the outer legs. In one embodiment, the inductance of the control winding is substantially constant with a change in current in the control winding. In another embodiment, the outer legs are saturated and the center leg is not saturated. Portions of the core connecting the three legs are tapered down from the cross-section of the center leg to the cross-sections of the outer legs. The invention further includes methods of varying the inductance of an inductive circuit element in accordance with a control current.

Abstract: An impedance matching device provided between a high-frequency generator and a load device matches an impedance of the high-frequency generator with an impedance of the load device and includes at least a coupled circuit which comprises a core, and a main winding and a control winding which are wound around the core. The coupled circuit changes an impedance of the impedance matching device by changing an inductance value of the main winding which depends on a magnitude of direct current flowing in the control winding.

Abstract: A high-performance integrable tunable inductor includes a "primary" coil and a "drive" coil placed in close proximity to each other and simultaneously driven with primary and drive currents, respectively. The drive current induces mutual components of inductance in the primary coil which vary with the phase and amplitude relationship between the two currents. These relationships are controlled to precisely establish the impedance of the primary coil, allowing the inductor to be "tuned" to provide a desired inductance or resistance by simply varying the phase and amplitude relationships appropriately. Inductance values tunable over ranges of about 2:1 and Q values of nearly 2000 have been demonstrated. The primary coil can also be made to operate as a relatively large integrated capacitance by setting the phase and amplitude relationships appropriately.

Abstract: A circuit that senses a current signal in a secondary winding of a transformer by monitoring a current signal in a primary winding of the transformer. The monitored current signal contains an effective current component and a magnetization current component. The magnitude of the effective current signal is related to the magnitude of the current signal in the secondary winding by the turns ratio of the transformer. The magnetization current signal produces flux in the transformer core and does not contribute to producing current in the secondary winding of the transformer. In addition, the magnetization current is 90 degrees out of phase with the effective current signal in the primary winding. The effective current signal in the primary winding is in phase with the voltage signal applied to the primary winding. The invention integrates the monitored current signal over 0 degrees to 180 degrees of the effective current signal waveform.

Abstract: A controllable inductor including at least one tubular core (10), a main winding (5) surrounding the core and a control winding (11) running substantially axially through said core and returning substantially axially outside thereof between said core and said main winding. The control winding is divided into a plurality of separate part control windings (12). The cross section of the part control windings is formed in a way that at least some adjacent part control windings inside the core are separated by means of a spacing (20, 26), which is at least partly defined by substantially parallel surfaces (16, 17) of these part control windings.

Abstract: A power distribution network including a voltage support transformer is disclosed which uses the fault current from a line of the power distribution network in which a fault condition exists to support or stabilize the voltage across one or more other lines of the network connected to the same bus and seeing the same source impedance, to maintain the voltage in those lines substantially at the pre-fault levels. The voltage support or stabilization in the unfaulted line is based upon a current change due to the impedance change in the faulted line caused by the fault.

Abstract: An enhanced variable impedance transformer is disclosed for controlling the power from an alternating input power source to a load in accordance with a direct current control signal. The variable impedance transformer comprises a first and a second annular saturable reactor core and an annular power core with a power input winding being simultaneously wound about the annular power core and the first and second annular saturable reactor cores. A power output winding is wound about the annular power core for transferring power to the load. The power input windings are connected to the alternating input power source for establishing a magnetic flux in the annular power core and in the first and second annular saturable reactor cores.