Abstract: A combined structure of hollow bobbin and conductive sheet for a transformer includes a hollow bobbin and at least one conductive sheet. The hollow bobbin includes an outer surface and at least one positioning structure formed on the outer surface. The conductive sheet is fit on the outer surface of the hollow bobbin and includes a main body and at least one engaging structure. The main body has a hollow portion, making the main body to have an inner circumference. The engaging structure is formed on the inner circumference of the main body and is engaged with the positioning structure of the hollow bobbin. The transformer includes at least one winding disposed on the outer surface of the hollow bobbin and abutting against the conductive sheet.

Abstract: There are provided a coil component and a method of manufacturing the same. The coil component includes a core; at least one bobbin coupled to the core and having a coil wound therearound; and a base having the core seated therein and including an external connection terminal, wherein one side of the core is seated in the bobbin and the other side thereof is exposed to the outside of the base.

Abstract: A power converting apparatus makes reduction of power loss possible and operates in a two-phase mode. A power converting apparatus of the inventive concept includes I-shaped block cores, each being made of a magnetic material; and E-shaped cores, each being produced by combining two L-shaped magnetic materials to each of the I-shaped cores. In each of the E-shaped cores, the block core is defined as a central leg, the other two legs are defined as a first outside leg and a second outside leg, respectively, and a closed magnetic path is configured by two E-shaped cores combined such that one of respective central legs in the two E-shaped cores, one of respective first outside legs therein, and one of respective second outside legs therein are caused to face the other of the central legs, the other of the first outside legs, and the other of the second outside legs.

Abstract: An inductor and a transformer, each of which includes a first bobbin on which a first coil is wound and a second bobbin on which a second coil is wound, are provided. The first bobbin includes a first bobbin part on which the first coil is wound and a first support part provided at one end of the first bobbin part. The second bobbin includes a second bobbin part on which the second coil is wound and a second support part provided at one end of the second bobbin part. Another end of the first bobbin part is coupled to the second support part and another end of the second bobbin part is coupled to the first support part.

Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of a dual wound coil. The coil ends of a dual wound coil can be on a common side, simplifying wiring. The dual wound coil may be configured with a low resistance, reducing resistive losses.

Abstract: A magnetic integration double-ended converter with an integrated function of a transformer and an inductor includes an integrated magnetic member having a magnetic core with three magnetic columns having at least three windings (NP, NS1, NS2) and at least one energy storage air gap, where a primary winding (NP) and a first secondary winding (NS1) are both wound around a first magnetic column or are both wound around a second magnetic column and a third magnetic column, and a second secondary winding (NS2) is wound around the second magnetic column; an inverter circuit with double ends symmetrically working, acting on the primary winding (NP); and a group of synchronous rectifiers (SR1, SR2), gate electrode driving signals of which and gate electrode driving signals of a group of power switch diodes (S1, S2) of the inverter circuit with the double ends symmetrically working complement each other.

Abstract: A planar electronic device includes a planar substrate having a cavity configured to receive a ferrite material body therein. The planar substrate has an upper side and a lower side and conductive vias extending through the substrate. Top conductors are provided on the upper side of the planar substrate and are electrically connected to corresponding conductive vias. Bottom conductors are provided on the lower side of the planar substrate and are electrically connected to corresponding conductive vias. The bottom conductors, top conductors and conductive vias define a primary conductive loop and a secondary conductive loop. An upper cover layer covers the upper side and has a high permittivity. The upper cover layer is positioned relative to the top conductors to increase capacitance between the primary and secondary loops.

Abstract: A common mode choke coil includes a primary coil and a secondary coil, wherein the primary coil includes a first coil pattern and a second coil pattern connected in series to the first coil pattern, and the secondary coil includes a third coil pattern and a fourth coil pattern connected in series to the third coil pattern. The first and third coil patterns are concentrically wound, as parallel or substantially parallel lines, in loop shapes on one surface, and the second and fourth coil patterns are concentrically wound, as parallel or substantially parallel lines, in loop shapes on the one surface with being adjacent to the first and third coil patterns.

Abstract: This disclosure provides implementations of inductors, transformers, and related processes. In one aspect, a device includes a substrate having first and second surfaces. A first inducting arrangement includes a first set of vias, a second set of vias, a first set of traces arranged over the first surface connecting the first and second vias, and a second set of traces arranged over the second surface connecting the first and second vias. A second inducting arrangement is inductively-coupled and interleaved with the first inducting arrangement and includes a third set of vias, a fourth set of vias, a third set of traces arranged over the first surface connecting the third and fourth vias, and a fourth set of traces arranged over the second surface connecting the third and fourth vias. One or more sets of dielectric layers insulate portions of the traces from one another.

Abstract: A coil device 10 comprises a first bobbin 40 having a first bobbin plate 42 provided with a first hollow cylinder 44 on which a primary coil 20 is wound at the outer periphery, and a second bobbin 50 mounted on the first bobbin 40 and having a second bobbin plate 52 provided with a second hollow cylinder 54 on which a secondary coil 30 is wound at the outer periphery. A winding center C1 of the primary coil 20 and a winding center C2 of the secondary coil 30 displace with a predetermined displacement (Lx) along a predetermined reference direction X.

Abstract: A system and method for manufacturing of a micro-transformer providing direct electrical isolation between a primary winding and a secondary winding while featuring tight magnetic coupling for a large possible step-up or step-down ratio. The micro-transformer may be implemented in an integrated circuit, and may include a magnetic core. A high stepping ratio, e.g. approximately 50 to 100, may be achieved by connecting multiple symmetric primary windings in parallel and multiple symmetric secondary windings in series, or vice-versa. A plurality of windings may be stacked vertically. The micro-transformer may be of particular utility in wireless sensor networks, thermal and vibrational energy harvesters, power converters, and signal isolators.

Abstract: In one embodiment, the present invention includes a transformer formed on a semiconductor die. Such transformer may have multiple coils, including first and second coils. Each coil may have segments that in turn are formed on a corresponding metal layer of the semiconductor die. The segments of a given coil are coupled to each other, and the first and second coils can be interdigitated with each other.

Abstract: A cost effective solution for construction of high frequency, double ended, isolated, push pull, center tapped power transformers operating in continuous/discontinuous mode with minimized winding proximity losses comprises at least two identical sets of windings with identical coupling coefficients. Each set of windings consists of at least one primary winding and at least one secondary winding tightly coupled to each other. Both the sets of windings are loosely coupled to each other with a magnetic field isolating separator.

Abstract: A transformer having a high degree of coupling is connected between, for example, an antenna element and a power feed circuit. The transformer having a high degree of coupling includes a first inductance element connected to the power feed circuit and a second inductance element coupled to the first inductance element. A first end of the first inductance element is connected to the power feed circuit and a second end of the first inductance element is connected to the antenna element. A first end of the second inductance element is connected to the antenna element and a second end of the second inductance element is grounded.

Abstract: A method for manufacturing a conductive coil, the method comprising using a semiconductor fabrication process (e.g. TSV) to manufacture a coil, typically a planar spiral conductive coil.

Abstract: The present disclosure provides a high-power variable inductor and a filter employing the same. A provided variable inductor comprises a first inductor and a second inductor. The first inductor is connected to a first input terminal and to a first output terminal of a two-port circuit. The second inductor is connected to a second input terminal and to a second output terminal of the two-port circuit. The first inductor and the second inductor are symmetrical to each other and jointly surround an adjustable area for varying an inductance of the variable inductor.

Abstract: Divided cores 11, 12 includes left and right leg portions and a yoke portion and formed by molding a yoke portion side core material within resin. The leg portions of the divided core are formed by tubular core mounting portions 41, 42. I-shaped leg portion side core materials 51-53 and spacers 6 are mounted in the tubular core mounting portions. A ring-shaped molded core 1 is formed by abutting and integrating the respective leg portions of two divided cores, and a coil 100 is wound around the molded core.

Abstract: A high frequency transformer with high conversion efficiency is provided. The high frequency transformer includes a first coil assembly 1 formed from a single flat wire, with first coils 1A that are configured by winding the flat wire edgewise plural times and that are formed at specific intervals, and a second coil assembly 2 formed from a single flat wire, with second coils 2A that are configured by winding the flat wire edgewise plural times and that are formed at specific intervals.

Abstract: A transformer-based circuit has at least a first port and a plurality of second ports. The transformer-based circuit includes a first winding conductor and a plurality of second winding conductors. The first winding conductor is electrically connected to the first port, and has a plurality of sectors connected in series to thereby form a plurality of loops, where the loops are arranged in a concentric-like fashion. The second winding conductors are magnetically coupled to the first winding conductor; besides, the second winding conductors are electrically connected to the second ports, respectively. Overall layout patterns of the second winding conductors are identical to each other. The first winding conductor acts as one of a primary winding conductor and a secondary winding conductor, and each of the second winding conductors acts as the other of the primary winding conductor and the secondary winding conductor.

Abstract: A voltage transforming apparatus includes a primary winding receiving an AC voltage, a plurality of secondary windings that are different in number of turns, and a voltage conversion circuit for converting an AC voltage induced in each of the plurality of secondary windings. Each of the plurality of secondary windings includes the first terminal and the second terminal each having a potential that is not fixed. The first terminal and the second terminal are separately provided in each of the secondary windings. The voltage transforming apparatus further includes a switching circuit for selectively connecting the first terminal and the second terminal of each of the plurality of secondary windings to the voltage conversion circuit.

Abstract: A transformer structure includes a bobbin, a conductive base, a first winding coil, plural second winding coils, and a magnetic core assembly. The bobbin includes a main body and a channel. The main body has a first winding section and plural first pins. The plural first pins are located at bilateral sides of the main body. The channel runs through the main body. The conductive base is disposed on a bottom side of the bobbin, and includes at least one connecting part. Through the connecting part of the conductive base, at least a portion of the plural first pins are electrically connected with each other. The first winding coil is wound around the first winding section. The second winding coils are connected with corresponding first pins. The magnetic core assembly is partially embedded into the channel of the bobbin.

Abstract: The common mode filter of the instant disclosure includes a non-magnetic insulating substrate, a stacked-layer structure, an insulating layer, and a magnetic layer. The stacked-layer structure is arranged on the non-magnetic insulating substrate. The magnetic layer is covered on the stacked-layer structure by the insulating layer arranged therebetween. The stacked-layer structure comprises a first coil and second coil, wherein the first coil is coupled to the second coil to suppress the common mode noise. Specially, a width W (mm) and a length L (mm) of at least one coil in the first and second coils satisfy the relational expression of: [(14.1?fc)/6.5]2<L/W<[(16.7?fc)/4.5]2 Where fc (MHz) is the cutoff frequency of a differential-mode signal.

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 laminar transformer having double-face secondary winding includes a primary winding part and a secondary winding part. The primary winding part further includes an isolating body seat and a plurality of coil sets. The secondary winding part further includes two plate-body set, each being positioned in the containing channel has a plurality of plate bodies and a plurality of insulating bodies. Each of the plate bodies has an opening for containing the central column and a guided channel that being positioned on a side of the opening has on both side thereof a pole lead respectively. The insulating bodies being a ring-shaped structure and being positioned in-between the plate bodies has a through hole for containing the central column. The plurality of plate bodies are laminated alternately and positioned in the central column making each of the plate-body sets form the one with four pole leads.

Abstract: A core fixing member including: a core fixing part that has a plate-like shape and is to be fixed to a core; a case fixing part that has a plate-like shape and is to be fixed to a case; and at least one an arm part connecting the case fixing part with the core fixing part, and wherein the core fixing part and the case fixing part are arranged in a same plane, and the at least one arm part is formed in a shape of a letter ‘U’, and one end of the at least one arm part is connected to the core fixing part and the other end of the at least one arm part is connected to the case fixing part.

Abstract: An inductor with patterned ground plane is described. In one design, the inductor includes a conductor formed on a first layer and a patterned ground plane formed on a second layer under the conductor. The patterned ground plane has an open center area and a shape matching the shape of the conductor. The patterned ground plane includes multiple shields, e.g., eight shields for eight sides of an octagonal shape conductor. Each shield has multiple slots formed perpendicular to the conductor. Partitioning the patterned ground plane into separate shields and forming slots on each shield help prevent the flow of eddy current on the patterned ground plane, which may improve the Q of the inductor. Multiple interconnects couple the multiple shields to circuit ground, which may be located at the center of the conductor.

Abstract: In accordance with an embodiment, a transformer includes a first coil disposed in a first conductive layer on a first side of a first dielectric layer, and a second coil disposed in a second conductive layer on a second side of the first dielectric layer. Each coil has a first end disposed inside its respective coil and a second end disposed at an outer perimeter of its respective coil. A first crossover disposed in the second conductive layer is directly connected to the first end of the first coil and extends past the outer perimeter of the first coil. In addition, a second crossover disposed in the first conductive layer is directly connected to the first end of the second coil and extends past the outer perimeter of the second coil.

Abstract: Method for improving the symmetry of the differential output signals of an integrated transformer of the symmetric-asymmetric type comprising an inductive primary circuit and an inductive secondary circuit, characterized in that the capacitive coupling between the primary and secondary circuits is reduced.

Abstract: A transformer has primary coils and secondary coils that are arranged in a laminated manner in a direction of a winding axis and are mutually insulated. The secondary coils are composed of conducting plates in a plurality of layers arranged in the laminated manner in the direction of the winding axis, and the conducting plates are electrically connected in series. Connecting portions between the each conducting plates are arranged in an inner space of the primary coils.

Abstract: A line reactor is presented having a skewed core structure with three horizontally non-coplanar vertical legs and top and bottom laminated, interleaved yoke structures with corresponding horizontally non-coplanar yoke ends.

Abstract: An isolated power converter that includes, in one embodiment, a first magnetic core having a primary winding and a secondary winding around the first magnetic core. The power converter includes a second magnetic core having a first leg, a second leg coupled to the first leg, and a third leg coupled to the first and second legs, wherein a part of the third leg is equidistant from the first leg and the second leg. The power converter also includes a first winding encircling the first leg, a first end of the first winding coupled to the secondary winding, a second winding encircling the second leg, a first end of the second winding coupled to the secondary winding, and a third winding encircling the third leg, a first end of the third winding coupled to a second end of the first winding and to a second end of the second winding.

Abstract: The present invention provides a hybrid transformer. In a transformer comprising a primary core and a secondary coil, the hybrid transformer includes a core with a 1st leg, a 2nd leg, and a 3rd leg; and a secondary coil with a 1st winding, a 2nd winding and a 3rd winding, which are wound zigzag on said 1st leg, said 2nd leg, and said 3rd leg. Two types of windings selected from the group consisting of said 1st winding, said 2nd winding and said 3rd winding are wound alternatively on said 1st leg, said 2nd leg, and said 3rd leg, respectively. However, the two types of windings wound on said 1st leg, said 2nd leg, and said 3rd leg, respectively, are wound in an overlapping manner around said core in the winding order.

Abstract: A combined winding structure is provided. The combined winding structure includes a plurality of winding wires each having a winding portion in a hollow column form, an anodic portion and a cathodic portion; the anodic portions and the cathodic portions are integrally extended from the winding portions respectively. The winding portions each have a surrounding dimension, and the surrounding dimensions are mutually different. The winding portion with the smaller surrounding dimension is located inside and surrounded by the winding portion with the larger surrounding dimension. With these arrangements, the combined winding structure can have a larger equivalent cross-sectional area and lower production costs. A magnetic device is also provided, which includes the aforesaid combined winding structure.

Abstract: A composite transmission line transformer includes at least one core, a first port, a second port, and one or more pairs of transmission lines wound about the core(s). Each transmission line is in signal communication with the first port and the second port. For each pair, the transmission lines are interconnected in series at the first port and at the second port such that the first port and the second port are DC-isolated from each other.

Abstract: A reactor part includes at least a winding and a magnetic substance core, in which the core includes a pair of winding portions around each the winding is wound, and a non-winding portion around which no winding is wound, wherein a cross-sectional area in a direction orthogonal to a magnetic path of the non-winding portion of the core is made smaller than a cross-sectional area in a direction orthogonal to a magnetic path of the each of winding portions.

Abstract: An electrical transformer is provided having a toroidal core; a plurality of wraps of a low impedance transmission line the low impedance transmission line including a transmission pair of first and second conductors such that the transformer creates a magnetic flux confined to interfaces between said first and second conductors and does not extend to the toroidal core, and the transformer having a coupling coefficient K arbitrarily close to 1 and a value of leakage inductance Ll arbitrarily close to 0.

Abstract: A transformer assembly for mounting a current transformer to an electrical apparatus. The generally toroidal current transformer senses electrical current in conductors of the electrical apparatus and has a housing. A mechanical lug for conductors of the electrical apparatus is mounted directly to the housing of the current transformer, within the central opening of the toroid. The mechanical lug has one or more conductor bores located within a main body of the mechanical lug for receiving respective conductor wires.

Abstract: An inductive electronic module comprises a planar core element having an inner limb and at least two lateral limbs, to which winding arrangements are assigned for forming a transformer. First and second partial windings are formed on first and second of the lateral limbs such that a resulting magnetic flux of the first planar winding arrangement is cancelled in the inner limb and the second planar winding arrangement is magnetically decoupled from the first planar winding arrangement on the inner limb. The inner limb has a first core section for interacting with the second planar winding arrangement and a second core section spaced from the first core section on the core element. The second core section interacts with an additional planar winding arrangement, which forms a series connection with the second planar winding arrangement. The second core section implements a magnetically active air gap for the additional planar winding arrangement.

Abstract: A galvanic die has signal structures and a transformer structure that provide galvanically-isolated signal and power paths for a high-voltage die and a low-voltage die, which are both physically supported by the galvanic die and electrically connected to the signal and transformer structures of the galvanic die.

Abstract: A dry power distribution transformer and a method of making the same are provided. The transformer has one or more high voltage windings, each of which includes a plurality serially connected discs. Each disc has two or more sections, wherein the sections are separated from each other by spaces arranged in a circumferential configuration.

Abstract: An inductor including a primary coil coaxially arranged and operated in parallel with isolated secondary coils each including at least one loop winding with two open-circuited ports. At least one phase shifting device is arranged between open-circuited ports of at least one secondary coil. A method to operate an inductor by combining primary and secondary coils with phase shifting devices to get a wide tuning range is also provided. The method includes the step of phase shifting open-circuited ports of at least one secondary coil.

Abstract: A combined winding structure is provided. The combined winding structure includes a plurality of winding wires each having a winding portion in a hollow column form, an anodic portion and a cathodic portion; the anodic portions and the cathodic portions are integrally extended from the winding portions respectively. The winding portions each have a surrounding dimension, and the surrounding dimensions are mutually different. The winding portion with the smaller surrounding dimension is located inside and surrounded by the winding portion with the larger surrounding dimension. With these arrangements, the combined winding structure can have a larger equivalent cross-sectional area and lower production costs. A magnetic device is also provided, which includes the aforesaid combined winding structure.

Abstract: A coil block and an electronic device using the same are provided. The coil block includes a first coil, a second coil, a core having an intermediate layer for separating the first coil and the second coil from each other, and a shield for shielding the first coil, the second coil, and the intermediate layer, wherein the first coil and the second coil have the same winding direction. According to the coil block and the electronic device, the filtering can be performed without any inductance offset even if the PWM signal having the inversed phase or the same phase is inputted. Also, since two windings can be wound on to one core using a common coil, the cost and the size of the coil block can be reduced.

Abstract: A transformer includes: a bobbin on which a coil is wound; a core coupled with the bobbin to provide a magnetic flux, at least a portion of the core being installed on the PCB in a penetrating manner; and a base plate electrically connected to the coil and having a lead frame connected to the PCB, wherein the base plate is installed to be reversedly disposed at an upper side of the bobbin on the PCB, a space is formed between a lower surface of the base plate and an upper surface of the PCB, and the space between the lower surface of the base plate and the upper surface of the PCB is supported by a support member in contact with the upper surface of the PCB.

Abstract: A transformer having a high degree of coupling is connected between, for example, an antenna element and a power feed circuit. The transformer having a high degree of coupling includes a first inductance element connected to the power feed circuit and a second inductance element coupled to the first inductance element. A first end of the first inductance element is connected to the power feed circuit and a second end of the first inductance element is connected to the antenna element. A first end of the second inductance element is connected to the antenna element and a second end of the second inductance element is grounded.

Abstract: A circuit for preheating filaments in lamps powered by an electronic ballast includes an inverter tank circuit and a preheat tank circuit. The preheat tank circuit has a preheat capacitor connected in parallel with a primary winding of a filament preheat transformer. A cut-back capacitor is connected between the preheat tank circuit and circuit ground. The filament preheat transformer has secondary windings coupled to the first and second lamp terminals to provide a filament preheat voltage. The inverter operates at a preheat frequency during a lamp preheat mode and at a steady-state frequency during a lamp steady-state mode, the steady-state frequency being lower than the preheat frequency. The preheat tank circuit has a natural resonant frequency that is approximately the same as the preheat frequency so that when the ballast is operating in the steady state mode, the filament voltage is substantially lower than when the ballast is operating in the preheat mode.

Abstract: A magnetic package for a communication system is disclosed the package comprises a plurality of transformers, wherein each transformer comprises a differential transformer. Each differential transformer comprises at least 2 sets of three pins. Each transformer is coupled to a twisted pair channel and a transceiver. The magnetic package includes at least one common mode transformer coupled to at least one of the transformers, wherein the at least one common mode transformer includes at least three pins. The at least three pins for the at least one common mode transformer are in a position relative to the other pins such that the package size is minimized.

Abstract: The transformer includes: first and second cores each including a magnetic center leg and a magnetic outer leg positioned outside of the magnetic center leg; a first adhesion part that adheres the magnetic center leg of the first core and the magnetic center leg of the second core to each other; a second adhesion part that adheres the magnetic outer leg of the first core and the magnetic outer leg of the second core to each other; a bobbin inserted through the magnetic center leg of the first core and the magnetic center leg of the second core, a primary coil and a secondary coil being wound on the bobbin; and an elastic member that applies pressure to the magnetic outer leg of the first core and the magnetic outer leg of the second core in a neighborhood of the second adhesion part, in an inward direction of the transformer.

Abstract: The transformer includes a bobbin, a plurality of terminal electrode, a primary coil, a secondary coil, and a hook part. The bobbin includes a core portion extending in an axial direction, and terminal bases fixed at both ends of the core portion in the axial direction. The plurality of terminal electrode regions is provided on the terminal bases. Each terminal electrode region is provided with a wire connection part. The primary coil comprises a plurality of primary wires. The secondary coil comprises a plurality of secondary wires. The hook part is disposed between the core portion and one of the terminal electrode regions and configured to hook at least one of the primary wires and the secondary wires.

Abstract: An electrosurgical system is disclosed. The electrosurgical system includes a multiple-secondary transformer configured for sensing voltage. The multiple-secondary transformer includes a primary winding coupled to an active terminal and a return terminal of the electrosurgical system and a plurality of secondary windings. Each of the secondary windings is configured to transform the radio frequency voltage into a sensed voltage. Each of the secondary windings includes an output coupled to a sensor circuit and configured to transmit the sensed voltage to the sensor circuit.