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

Abstract: Toroidal inductive devices are manufactured with high efficiency through the use of bobbin winding techniques or wound magnetic pattern members.

Abstract: To provide a transformer in which costs of a backlight device are reduced by lighting a lamp without requiring an additional member for connecting the lamp to an inverter. A transformer according to the present invention includes terminal bases and in which terminal pins are implanted, a bobbin formed by winding a primary winding and secondary windings and around the outer circumference of a winding core, and a core. A lamp connecting terminal is arranged to the terminal bases and, and an electrode of a lamp is directly connected to the lamp connecting terminal, thereby attaching the lamp to the terminal bases and. The transformer is integrated into an inverter for a backlight device of a liquid crystal display apparatus, thereby lighting the lamp without using an additional member for connecting the lamp to the inverter.

Abstract: Method for mounting a gradient coil in a cylindrical magnet of a magnetic resonance system and associated magnetic resonance system, wherein the exterior of the gradient coil is foam-bonded flat against the inner wall of the magnet at least in sections, at least one element being foamed in place during mounting, thus creating at least one continuous channel, said channel being used for the insertion of a cutting and/or separating tool for ripping open the foam bond between the gradient coil and the cylindrical magnet.

Abstract: A high-voltage generating transformer for a discharge lamp lighting apparatus according to the present invention includes a rodlike core; a secondary winding bobbin that is divided into a plurality of sections, and where the core is disposed in the central portion thereof; a secondary winding part wound on the secondary winding bobbin, divided between the plurality of sections of the bobbin; a primary winding bobbin disposed around the outer periphery of the secondary winding part; and a primary winding part wound on the primary winding bobbin; wherein the primary winding bobbin is changed in thickness every section or every plurality of sections of the second winding part such that the bobbin has a thickened thickness on the side where the potential difference between the primary winding part and the secondary winding part is high, and the bobbin has a thinned thickness on the side where the potential difference is low.

Abstract: There is provided a joint structure of a wound iron core in which iron core characteristics can be enhanced by improving the distribution of magnetic flux within an iron core. A wound iron core is formed to provide a joining structure or a butt joining structure and a lap joining structure disposed in an appropriate arrangement in which the a margin of overlapping is more increased as being closer to an outer periphery from an inner periphery of the iron core, taking a distribution of magnetic flux density within the iron core into consideration.

Abstract: A transformer for driving multi-lamps and a backlight module thereof are provided. The transformer comprises a primary winding, a secondary winding, a core, a first bobbin and a second bobbin. The primary winding comprises a primary coil. The secondary winding comprises a secondary coil and a plurality of auxiliary coils whose turns are substantially equal. The core has a first side and a second side. The first bobbin and the second bobbin are respectively disposed on the first side and the second side for winding around the primary coil, the secondary coil and the auxiliary coils.

Abstract: Magnetic flux in a magnetic flux distribution inside a wound iron core for a stationary apparatus is mal-distributed toward the inner periphery side where the magnetic path of a laminated magnetic steel sheet is short with respect to the total lamination thickness and magnetic resistance is small and the inner periphery side on which magnetic flux is concentrated has a high magnetic flux density and increased iron loss, and therefore magnetic steel sheets of different magnetic characteristics are disposed at an arbitrary lamination ratio to make uniform the magnetic flux distribution inside the same wound iron core.

Abstract: The present invention is generally concerned with an inductance assembly that is so configured and sized as to be inserted inside the cooling assembly of an electric machine to thereby decrease the overall volume of the machine.

Abstract: The present invention relates to a transverse non-cylindrical gradient coil, having at least one divergent section, and to production methods for such non-cylindrical gradient coils having at least one divergent section having the following steps of production of a planar fingerprint coil or a planar fingerprint coil segment, positioning and attaching the planar coil or planar coil segment on a support plate and formation of a conical saddle coil (51) or a conical saddle coil segment (45) by rolling up the support plate to form a conical surface (50,46).

Abstract: A transformer includes a primary winding, a secondary winding, and a transformer core having a first leg, a second leg and a third leg. The second leg is positioned between the first leg and the third leg, and the primary winding is wound around the first leg, the second leg and the third leg. A power converter includes a primary winding, a secondary winding, a rectifier coupled to the secondary winding, and a transformer core having a first leg, a second leg and a third leg. The second leg is positioned between the first leg and the third leg, and the primary winding is wound around the first leg, the second leg and the third leg.

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 current transformer includes a CT core having a central opening, a height, a width, inner and outer radii, and a secondary winding disposed about the CT core. The CT core is formed from a winding of an elongated length of taped steel having a reluctance and a width. The CT core height corresponds to the taped steel width. The CT core width is equal to the difference between the outer and inner radii. An air gap having a reluctance, a width and a depth is disposed in the CT core. The depth is along a portion of the CT core height. The air gap width is substantially smaller than the CT core height and width. The air gap reluctance is substantially greater than the taped steel reluctance. The CT core has a permeability resulting from being annealed at a temperature of 1450 to 1550° F. for one hour.

Abstract: There is provided a joint structure of a wound iron core in which iron core characteristics can be enhanced by improving the distribution of magnetic flux within an iron core. A wound iron core is formed to provide a joining structure or a butt joining structure and a lap joining structure disposed in an appropriate arrangement in which the a margin of overlapping is more increased as being closer to an outer periphery from an inner periphery of the iron core, taking a distribution of magnetic flux density within the iron core into consideration.

Abstract: A magnetic field production system is proposed and has a two-dimensional winding configuration with two windings. The windings are disposed essentially orthogonally with respect to one another and enclose a machine or system. The windings have winding axes that are essentially at right angles to one another, and which are supplied with alternating variables via two feed circuits. In order to produce a two-dimensional, rotating magnetic field, the two alternating variables are at the same frequency, have similar current amplitudes and similar voltage amplitudes, and are synchronized to one another. A phase shift of preferably 90° is set between the alternating variable of the first feed circuit and the alternating variable of the second feed circuit. Furthermore, a three-dimensional magnetic field, as well as an configuration for wire-free supply of a large number of sensors and/or actuators using a magnetic field production system are possible.

Abstract: A magnetic core has a toroidal configuration, formed by winding an iron-based amorphous metal ribbon. Thereafter the core is heat-treated to achieve a linear B-H characteristic. Advantageously, the linear B-H characteristic does not change with the level of magnetic fields applied and the frequency utilized. With such properties, the core is especially suited for use in a current transformer.

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 silicon steel core for transformers or choke coils includes at least one silicon steel sheet core which has at least two sets of silicon steel sheets that have respectively a magnetic flux section of a different length such that when two sets of the silicon steel sheet cores are coupled, the magnetic flux sections form at least two gaps of different intervals. Thereby the silicone steel sheet sets of a smaller gap can provide adequate electric induction for the transformers or choke coils while the silicone steel sheet sets of a greater gap can reduce the saturated condition when the transformers or choke coils are in the high load condition.

Abstract: A transformer or inductor core of magnetic material has three legs (6, 8, 10) interconnected by yokes. The core comprises loops (12, 14, 16) of wires and/or strips of magnetic material, wherein each of the loops makes up part of two of the legs. Loops making up part of two different leg portions are interleaved in a common leg portion. This provides for mechanical stability and good magnetic properties for the core.

Abstract: Transformer cores, especially those of wound or laminated annealed amorphous metals which include support assemblies are disclosed. Methods for their manufacture, and their use in assembled transformers are also disclosed.

Abstract: Four metal foil windings can be bonded to the inside of a magnetic core, each in a 90 degree helix. Very simple direct and straight connections can connect the windings to the windings of another similar core in a flat transformer module with no crossovers or overlaps. The center-tap and output terminations are located similarly to the two turn version of the flat transformer module, but make a module with four turns. This may be used as a push-pull winding having two turns on each side of the center-tap, or it may be used as a four turn winding, as, for instance, with a full bridge rectifier in a power converter.

Abstract: A presently-preferred method of manufacturing a stacked core for a magnetic-induction device comprises cutting a sheet of magnetic material into one or more strips of the magnetic material so that a width of each strip changes along a length of the strip. The presently-preferred method also comprises cutting the strips to form a plurality of laminae having different widths. The presently-preferred method further comprises stacking and bonding the laminae to form a winding leg, an outer leg, or a yoke having laminae of relatively large width positioned at its approximate center, laminae of relatively small width positioned at its outer edges, and laminae of progressively decreasing width positioned between the center and the edges.

Abstract: A multi-lamp system for driving a lamp set having a first lamp and a second lamp comprises a driving circuit for converting a DC signal to an AC signal, a transformer having a primary side coupled to the driving circuit and a secondary side for outputting the AC power, and a current balance circuit coupled to the low voltage terminal of the lamp set for balancing the current values flowing through the first lamp and the second lamp. The current balance circuit comprises a magnetic core, a first winding coupled to the first lamp and a second winding coupled to the second lamp. The first winding and the second winding are wound on the magnetic core and have the same coil number.

Abstract: A transformer core comprises at least one leg and at least one yoke part, wherein the cross section of the leg or the legs regularly multi-edged with more than four edges. The core is made up of rings rolled from strips of constant width, whereby good electrical properties are achieved. The transformer is also easy to manufacture and avoids waste of material.

Abstract: A transformer includes a ferrite base plate having a chamber for receiving a winding and one or more further windings which may be coupled to a ground. The windings are electrically coupled together, and separated from each other by partitions. An insulating strap may be wound around the ferrite base plate, and engaged with the ground, for securing the ground to the ferrite base plate and for preventing the ground to the ferrite base plate from moving relative to the ferrite base plate. One or more conductive panels may be engaged between the partitions of the windings.

Abstract: Magnetic cores including coiled amorphous ferromagnetic alloy strips are addressed. The composition of the alloy essentially corresponds to the formula Coa(Fe1−xMnx)bNicXdSicBfCg, where X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge, and P; and a, b, c, d, e, f, and g are indicated in atom percent and meet the following conditions: 40≦a≦82; 3≦b≦10, 0≦c≦30; 0≦d≦5; 0≦e≦20; 7≦f≦26; 0≦g≦3; with 15≦d+e+f+g≦33 and 0≦x≦1.

Abstract: This invention refers to the technical field of electricity. The said transformer caters for present deficiencies of variable transformers, regarding the size of the voltage supplied and its accuracy. The accuracy of the voltage supplied of the modern variable transformers presented gaps usually in the order of 0.5-1.5 V (or higher), whereas the voltage supplied is in the order of 120-130% of the used voltage. The referred variable transformer provides absolutely continuous voltage (without gaps), of any value. Furthermore, if features the advantage, that the intensity supplied to be maintained steady throughout the duration of the supply, for any change of the value of the voltage supplied. The above are achieved, by the exact word, of absolute control of the magnetic flow. Constructively it consists of three half cores core-type (see drawing 1, 2 and 4).

Abstract: A current transformer, includes, a Rogowski coil for detecting an alternating current of a main circuit, and outputting a measure of the alternating current as an analog-voltage signal, includes, a printed circuit board, a sensor unit and an optic transmission path.

Abstract: A transformer or inductor core of magnetic material has three legs (6, 8, 10) interconnected by yokes. The core comprises loops (12, 14, 16) of wires and/or strips of magnetic material, wherein each of the loops makes up part of two of the legs. Loops making up part of two different leg portions are interleaved in a common leg portion. This provides for mechanical stability and good magnetic properties for the core.

Abstract: An ultra-miniature magnetic device generally comprises a conductive winding and a magnetic core. The magnetic core is of an elongate rectangular or oval shape having two elongate sections and two short sections having an easy axis of magnetization on all sections. In an example embodiment, a section of a magnetic core is formed by plating an exposed portion of a substrate that is covered by a photoresist mask. During plating the substrate is subjected to an external magnetic field to provide an easy axis. Another section of the magnetic core is then formed by masking the plated portion and plating the exposed portion of the substrate to form a magnetic core. In a related embodiment, a non-magnetic metallic material layer is interleaved between two magnetic layers to form a high inductance magnetic core.

Abstract: The present invention aims to implement a pair of gradient coils low in magnetizing force with respect to pole pieces. Upon manufacturing a pair of gradient coils each of which produces gradient magnetic fields by currents that flow through a plurality of concentric passes, the maximum radius of one of current passes for the gradient coil is set as the minimum value at which a gradient magnetic field having a magnetic field error within a predetermined allowable range can be produced.

Abstract: The present invention relates to cores and coils for electrical transformers in which lateral walls of either Wescore or toroidal type cores are manufactured by winding strips of different heights or only one strip whose width reduces gradually, so that the lateral walls form an angle relative to the core upper wall. The corresponding coil is manufactured following the core pattern, on which core the coil will be placed or wound. The use of the cores and coils of the present invention achieves substantial savings in materials used to manufacture electrical transformers, while the resulting characteristics and electrical losses are improved, with load and with no-load.

Abstract: A wound and laminated iron core is formed by winding a soft magnetic thin strip into a circular ring shape or elliptical ring shape. A coil is then wound around almost an entire outer periphery of the ring of wound and laminated iron core. A cross sectional shape of the wound and laminated iron core vertical to a peripheral direction of the ring is any one of: (i) a circular shape, (ii) an elliptical shape, (iii) a substantially regular polygon of at least 6 sides, (iv) a shape encircled by a pair of point-symmetrically positioned circular arcs or elliptical arcs with a nearly straight line connecting respective edges of the pair of circular arcs or elliptical arcs on both sides of the pair of circular arcs or elliptical arcs, and (v) a shape of a substantially regular polygon of at least 4 sides whose apexes comprise a circular arc or an elliptical arc.

Abstract: Magnetic cores including coiled amorphous ferromagnetic alloy strips in which at least fifty percent of the volume contains fine crystalline particles with an average particle size of 100 nm or less are addressed. The composition of the alloy essentially corresponds to the formula FeaCobCucSidBeMf, where M is at least one of the elements V, Nb, Ta, Ti, Mo, W, Zr, and Hf; and a, b, c, d, e, and f are indicated in atom percent and meet the following conditions: 0.5≦c≦2; 6.5≦d≦18; 5≦e≦14; 1≦f≦6; with d+e>18 and 0≦b≦15, and a+b+c+d+e+f=100.

Abstract: An auxiliary wiring structure for stabilizer which includes a ferrite core and a separator. The ferrite core is assembled by annular silicon sheets and has a slot formed at a selected location. The separator is clamped in the slot and enables wiring for a coil around the ferrite core be done in a well organized layer structure thereby to provide a stable current output for discharging lamp tube or other electric devices use.

Abstract: An inductance element comprises a coil having a hollow portion opened at both ends and provided with a winding of which number of turns (N) per length 10 mm is 20 or more and 500 or less, and a core having a single layer or a plurality of layers of magnetic ribbon of a thickness of 4 &mgr;m or more and 50 &mgr;m or less and a width of 2 mm or more and 40 mm or less, at least part thereof being disposed in the hollow portion. In such an inductance element, a ratio (N/n) of a number of turns (N) of the coil per length 10 mm to a number of layers (n) of the magnetic ribbon is set at 20 or more and 500 or less. The magnetic ribbon, for instance in a state disposed in the hollow portion of the coil, has an open magnetic circuit structure. Instead, the magnetic ribbon, by disposing penetrating the hollow portion and magnetically connecting both ends thereof, forms a closed magnetic circuit loop. Such an inductance element possesses excellent inductance characteristics and is good in winding efficiency.

Abstract: The invention provides an ignition device of a cylindrical shape for an internal combustion engine, in which device it is possible to improves a productivity of a side core and a center core and to improve the efficiency of converting a magnetic flux together with the decreasing of the number of the steps of assembling process. The ignition device comprises a primary coil, a secondary coil, a center core, a side core, all of which are located concentrically in this order from the inside thereof, and a silicon steel strip having a thickness not more than 0.2 mm is used an a material of the side core so that a spirally wound, cylindrical shape is provided. Further, a thin film amorphous silicon steel strip having a flux density B8≧1.4T at a direct current magnetizing force of 800 A/m or a crystallized silicon steel strip having a thickness not more than 0.

Abstract: Transformer cores, especially those of wound or laminated annealed amorphous metals which include support assemblies are disclosed. Methods for their manufacture, and their use in assembled transformers are also disclosed.

Abstract: The present invention provides a foil winding with multiple high current terminals and a method for producing the foil winding. Conductive foil and insulation film are wound together to form a wound assembly. During winding, temporary pins are placed along the axis at radii where terminals are desired. Foil windings are cut from the wound assembly and terminals pressed into place where the cutoff pins remain in the foil winding from the temporary pins. In an alternate method, a terminal pin can take the place of the temporary pin when winding the wound assembly and remain in the foil winding as the electrical connection to the conductive foil.

Abstract: A spark ignition system for igniting fuel in an internal combustion engine is described. The spark ignition system includes a magnetic core-coil assembly having a ferromagnetic amorphous metal magnetic core and driver electronics. The core-coil assembly and driver electronics are capable of operating with a rapid charge and discharge cycle to produce a high spark pulse rate.

Abstract: A dry-type power distribution transformer has a generally rectangular, wound amorphous metal core and a resin encapsulated, generally rectangular coil. The core has a generally rectangular core window within which is located a substantially straight section of the coil. When assembled to form a power distribution transformer, the shape of the coil's substantially strait section conforms to the shape of the core window. The transformer is inexpensive to manufacture, exhibits low resistivity and low core loss, and is light weight, compact and reliable in operation.

Abstract: A wound core for a toroidal transformer has an improved shape, for example, circular or elliptic longitudinal ends in section, to properly attach a coil (toroidal winding) to the wound core. Therefore, the wound core allows a toroidal transformer that employs the wound core to achieve full performance, and improves the productivity of the toroidal transformers.

Abstract: A wound core for a toroidal transformer has an improved shape, for example, circular or elliptic longitudinal ends in section, to properly attach a coil (toroidal winding) to the wound core. Therefore, the wound core allows a toroidal transformer that employs the wound core to achieve full performance, and improves the productivity of the toroidal transformers.

Abstract: An amorphous metal core transformer is provided with a plurality of wound magnetic cores composed of amorphous metal strips, and a plurality of coils, each of the coils including a primary coil and a secondary coil, each of the coils further including a bobbin. The primary coil employs different material from that of the secondary coil, e.g., a copper conductor is employed in a primary coil, while an aluminum conductor is employed in a secondary coil. The bobbin has higher strength than that of the amorphous metal strips.

Abstract: A magnet core for current sensors composed of a soft-magnetic alloy is disclosed which comprises at least two bent or buckled alloy band sections. A magnet core is also described with a primary leg and a secondary leg, whereby the secondary leg is formed of an alloy band section in single lay and of an alloy band section in double lay. The invention is also directed to a current sensor and to a method for manufacturing a magnet core.

Abstract: An electric discharge lamp lighting device wherein a high voltage generating transformer 10 comprises a secondary coil 13 wound on an outer side of a laminated core 12 disposed in the center of a bobbin 11 and a primary coil 14 wound on an outer side of said secondary coil 13. A high voltage output terminal 13a of said secondary coil 13 is connected to a high voltage terminal of an HID lamp through a terminal 12a of a laminated core 12. A low voltage input terminal 13b of said secondary coil 13 is connected to a primary coil 14. As a result, insulation volume can be reduced and a reduction in the size of the device can be achieved.

Abstract: A starter module for a discharge lamp, especially for a motor vehicle, includes a high tension transformer which has a magnetic circuit component such as an annular core, on which a primary winding (1b) and a secondary winding are wound. The transformer further includes an arrangement for modifying its magnetic characteristics so as to reduce the saturation level of the secondary winding.

Abstract: A core (1) for use in a magnetic coil with a filled first gap (2) is realized through the provision of the first gap (2), filling of the first gap (2) with a curable synthetic resin (3), and curing of said resin (3). After curing, the synthetic resin is substantially homogeneously distributed over the first gap (2) and has a concave surface (17). The synthetic resin (3) may contain a filler, which preferably substantially consists of a magnetic material.

Abstract: A transformer comprising: a coil bobbin which includes a pair of core winding portions and a pair of coupling portions for coupling the core winding portions so as to space the core winding portions a predetermined distance from each other and is formed, on its whole outer periphery, with a groove; a winding which is obtained by winding a conductor around the groove of the coil bobbin a predetermined number of times; and a pair of wound cores each of which is obtained by winding an electromagnetic steel plate around each of the core winding portions of the coil bobbin a predetermined number of times; wherein an outer peripheral surface of each of opposite side walls of the groove at the core winding portions is curved so as to have an arcuate cross-sectional shape.

Abstract: A wound and laminated iron core is formed by winding a soft magnetic thin strip into a circular ring shape or elliptical ring shape. A coil is then wound around almost an entire outer periphery of the ring of wound and laminated iron core. A cross sectional shape of the wound and laminated iron core vertical to a peripheral direction of the ring is any one of: (i) a circular shape, (ii) an elliptical shape, (iii) a substantially regular polygon of at least 6 sides, (iv) a shape encircled by a pair of point-symmetrically positioned circular arcs or elliptical arcs with a nearly straight line connecting respective edges of the pair of circular arcs or elliptical arcs on both sides of the pair of circular arcs or elliptical arcs, and (v) a shape of a substantially regular polygon of at least 4 sides whose apexes comprise a circular arc or an elliptical arc.