Abstract: In a coil device, a first coil includes a common terminal side first coil conductor connected to a ground terminal, an intermediate first coil conductor, and an input/output terminal side first coil conductor connected to a first input/output terminal, and a second coil includes a common terminal side second coil conductor connected to the ground terminal, an intermediate second coil conductor, and an input/output terminal side second coil conductor connected to a second input/output terminal. The input/output terminal side first coil conductor is located between the intermediate second coil conductor and the input/output terminal side second coil conductor, and the input/output terminal side second coil conductor is located between the intermediate first coil conductor and the input/output terminal side first coil conductor.

Abstract: A stator unit including a coil in which a distance between an m?1-th turn and an m-th turn is wider than each distance in a first turn to the m?1-th turn. The m+1-th turn is disposed between the m?1-th turn and the m-th turn. Further, in a cross-section perpendicular to a central axis and passing a tooth, an angle between a line segment connecting respective centers of the m+1-th turn and the m?1-th turn and a line segment connecting respective centers of the m+1-th turn and the m-th turn is about 120° or more. With this structure, bulging in a circumferential direction of the coil adjacent to an inner peripheral portion of the tooth can be suppressed and a clearance can be secured between adjacent coils such that the number of turns of the coil can be increased.

Abstract: A stator unit including a coil in which a distance between an m?1-th turn and an m-th turn is wider than each distance in a first turn to the m?1-th turn. The m+1-th turn is disposed between the m?1-th turn and the m-th turn. Further, in a cross-section perpendicular to a central axis and passing a tooth, an angle between a line segment connecting respective centers of the m+1-th turn and the m?1-th turn and a line segment connecting respective centers of the m+1-th turn and the m-th turn is about 120° or more. With this structure, bulging in a circumferential direction of the coil adjacent to an inner peripheral portion of the tooth can be suppressed and a clearance can be secured between adjacent coils such that the number of turns of the coil can be increased.

Abstract: The present invention is to provide a plurality of unit coil portions formed by winding one conductive wire about a winding axis is placed side by side in the winding axis direction, each of the unit coil portions is formed by unit wound portions having different inner circumferential lengths from each other, the unit coil portion is multi-layered in at least a part thereof by pushing at least a part of the unit wound portion having a small inner circumferential length inside the unit wound portion having a large inner circumferential length, and the unit wound portion is wound along a loop shape winding route having a plurality of arc shape corner parts. In unit wound portions forming the unit coil portion, corner parts formed at the same phase angle with respect to the winding axis are formed in an arc shape having curvature center at the same position.

Abstract: A flux transfer device includes a first conductive element for generating magnetic flux when energized by an electric current and a second conductive element being concentric with the first conductive element, wherein the second conductive element generates an electric voltage/current in response to changes in the magnetic flux. A first magnetic element is concentric with the first conductive element, such that the magnetic flux generated by the first conductive element displaces at least a portion of the magnetic flux from the first magnetic element, thereby inducing an electric voltage/current in the second conductive element. A third conductive element and a second magnetic element may be positioned concentrically with the first conductive element such that the magnetic flux generated by the first conductive element displaces at least a portion of magnetic flux from the second magnetic element, thereby inducing an electric voltage/current in the third conductive element.

Abstract: A conductive winding structure, the fabricating method thereof, and the magnetic device having the same. The method for fabricating the conductive winding structure includes: (a) providing a mold with a plurality of extension portions and a plurality of protrusions, the plurality of extension portions are connected to each other as a continuous spiral structure, and the plurality of protrusions extend from the plurality of extension portions; (b) performing an electroforming procedure to form a conductive layer on partial surface of the mold; and (c) stripping the conductive layer from the mold, so as to obtain the conductive winding structure.

Abstract: A reactor coil includes first and second coil elements each formed by edgewise and rectangular winding of one piece of rectangular wire rod in a manner in which the wound rectangular wire rod is stacked rectangularly and cylindrically and, at a winding terminating end point of the first coil element, the rectangular wire rod is bent approximately 90 degrees in a direction opposite to the winding direction of the first coil element so that the rectangular wire rod is stacked in a direction opposite to the stacking direction of the first coil element and is wound edgewisely and rectangularly in a direction opposite to the winding direction of the first coil element to form the second coil element and, as a result, the first coil element and second coil element are aligned in parallel to each other in a continuous state.

Abstract: A wiring assembly having a conductor positioned about an axis in a helical-like configuration to provide a repetitive pattern which rotates around the axis. In one embodiment, when a current passes through the conductor, a magnetic field having an orientation orthogonal to the axis changes direction as a function of position along the axis.

Abstract: A multilayer aligned-winding coil (1) of a wide width wire, each layer having an obliquely crossing winding part extending obliquely with respect to a cross-section in one partial angular region of a virtual endless ring defined by the cross-section, and a transverse winding part extending transversely in an other partial angular region, includes a plural pairs of consecutive two layers meeting conditions 1 and 2; 1: a first row of winding portion including a transverse winding part having a progressively riding transverse winding part (YM, YM) riding progressively on a last row of the obliquely crossing winding part of a lower layer of the two layers to reach an upper layer thereover, and 2: a second row of winding portion including a riding and obliquely crossing winding part (RM, RM) having a ride-over region (X2, X4) crossing obliquely from a riding start region of the progressively riding transverse winding part (YM, YM) across a progressive riding region of the progressively riding transverse winding pa

Abstract: A conductor assembly of the type which, when conducting current, generates a magnetic field or in which, in the presence of a changing magnetic field, a voltage is induced. According to an exemplary embodiment a conductor is positioned along a path of variable direction relative to a reference axis. The conductor has a width measurable along an outer surface thereof and along a series of different planes transverse to the path direction. The measured conductor width varies among the different planes. In one example, the conductor path is helical, positioned about the axis between turns of helical spaces, and the conductor width varies as a function of the azimuth angle.

Abstract: A single coil for constituting a compact coil unit for a linear motor is provided. A single coil of a coil unit for a linear motor includes a pair of effective conductors for contributing to generating a thrust force for a moving body of a linear motor, and connecting conductors for connecting between the effective conductors. The connecting conductors are offset from a coil plane which includes the pair of effective conductors, and extend in parallel with the coil plane, and simultaneously a transverse section of the connecting conductors has an approximately trapezoidal shape including parallel sides which are approximately perpendicular to the coil plane, and a tilted side which is opposed to the coil plane, and is tilted toward a direction opposite to the direction of the offset in the extending state.

Abstract: An RF choke for separating or joining an RF signal and an AC power signal on e.g. a CATV transmission line has a large current carrying capacity. The RF choke uses 14 to 16 gauge magnetic wire in order to carry currents as high as 15 amps. In addition, the RF choke has excellent performance as measured by RF frequency response and hum modulation.

Abstract: An EMC filter for a balanced multi-wired telecommunication line has an oblong closed magnetic path core 50 having at least one first core arm 50a with a first length and second core arms 50b with a second length which is equal to or shorter than the first length, and a plurality of coils 51 constituted by at least one pair of wires. The at least one first core arm 50a and the second core arms 50b constitute a closed magnetic path. The wires of each pair are closely positioned each other and wound around the at least one first core arm 50a so as to produce magnetic fluxes in the first core arm 50a flowing toward the same direction when a common-mode current flows through the wires. Each of the coils 51 has a signal input end and a signal output end, and the wires run in a one-way direction from the signal input ends to the signal output ends, respectively.

Abstract: An illumination unit comprises an electrodeless low-pressure discharge-lamp and a high-frequency power supply unit. The lamp has a gastight closed discharge vessel with an ionizable fill and a coil with turns of a primary and a secondary winding around a core of soft-magnetic material. The power supply unit has input terminals, a first output terminal, electrically neutral with respect to ground, that is connected to a first end of the primary winding, and a further output terminal that is connected to a second end of the primary winding. During nominal lamp operation the primary winding excites a high-frequency magnetic field that maintains an electrical discharge in the discharge vessel and that induces in the secondary winding a potential drop in the direction of a first, with respect to the electrically neutral end, to a second free end that varies in a sense opposite to the potential drop from the first to the second end in the first winding.

Abstract: An RF Choke and tap having improved insertion loss, amplitude modulated distortion of video and audio carrier signals at CATV frequencies. The RF choke includes a 20 AWG magnetic wire wound on a ferrite rod. The magnetic field effects of the choke are optimized by selecting the choke winding pattern, rod core material and positioning of a resistor between selected windings. The wire is wound by placing two groups of the 4 tightly wound wires adjacent the ends of the rod. A group of 3 very loosely wound wires is separated from the wound wires and placed between the groups of 4 tightly wound wires. A resistor is electrically connected to a first wire in one of the groups of tightly wound wires and connected to a first wire in the group of the loosely wound wires.

Abstract: A tesseral gradient coil for use in a nuclear magnetic resonance tomography apparatus is disposed in the hollow-cylindrical interior of the magnet system which generates the fundamental magnetic field, with one segment of each turn of the gradient coil lying on a small radius and one segment lying on a large radius, with reference to the cylinder access. The parasitic magnetic field which is unavoidably generated by the gradient coil, and which induces currents in the examination subject and in the cryostat of the fundamental field magnet system, is significantly reduced by this coil arrangement. The structure of the gradient coil is particularly suitable for use in the echo planar method, wherein the gradients must be switched rapidly and induced currents are therefore especially disturbing.

Abstract: A variable transformer is disclosed. The transducer includes a uniform pitch winding wound on a hollow bobbin with several continuously variable concentric coils wound over it with layers of insulation in between. The variable coils are wound in accordance with true trigonometric functions by adjusting the pitch between adjacent turns and reversing the direction of winding at each maximum pitch point corresponding to the zero crossover. The variable pitch coils are physically wound in quadrature with respect to a reference point on the bobbin. The transducer is finished by placing a magnetic shield over the bobbin which may include magnetic end washers. Lead wire connections are made and the entire unit is placed in a suitable housing. A moveable core, made from a highly permeable material, is placed inside the unit for slidably engaging the bobbin in its hollow.

Abstract: Pickup coils for imaging magnetometers are formed from plural turns of a conductor with varying spacing between turns selected so that the Fourier transform of the coil turns function which is the filter function of the coil, has no zeroes within the spatial frequency bandwidth of the magnetic field generated by a two or three dimensional current to be imaged. Various exemplary coil configurations are presented including a Gaussian distribution for the turns of a planar coil.

Abstract: In a method of manufacturing a heating coil assembly for electromagnetic induction cooking heater in which a coil supporting base and a flat shaped coil winding frame are mounted on the spindle of a coil winding machine in such a manner as to form a coil receiving space therebetween, and a wire is wound in the space to form a coil, the coil supporting base and/or the coil winding frame has protrusions which extend in the space at the middle part, to vary the coil winding pitch, whereby the coil thus formed has a gap at the middle part, thus showing a uniform temperature distribution when energized.

Abstract: A linear variable differential transformer (LVDT), includes a hollow bobbin with first and second ends, a ferromagnetic core adapted for linear movement within the bobbin, a primary coil wound around the exterior of the bobbin, and first and second secondary coils wound around the primary coil. The first and second secondary coils are wound from starting points at the first and second bobbin ends, respectively. The seconardy coils are then wound continuously and simultaneously toward the opposite bobbin ends, so that the two secondary coils cross over each other at a cross-over point approximately halfway between the bobbin ends. The second secondary coil thus overlaps the first secondary coil between the cross-over point and the first bobbin end, and the first secondary coil overlaps the second secondary coil between the cross-over point and the second bobbin end. Each of the secondary coils has a sufficient continuous length to overlay substantially the entire length of the primary coil.

Abstract: Electrical inductive apparatus characterized by pancake coils comprised of an outer layer and a plurality of inner layers formed by spirally winding an elongated conductor which conductor has a plurality of strands formed in a row of strands in each layer including an end strand at each end of the row, the end strand being enclosed in dielectric covers with each layer being encased in a dielectric casing, whereby the end strands of adjacent layers are sufficiently insulated to prevent electrical breakdown therebetween.

Abstract: Continuous testing apparatus for determining the magnetic characteristics of a strip of moving material including a flux inducing and pick-up device to induce a quantity of flux into the material and dual voltage output producing coils for producing different voltages from material having the same magnetic permeability, and circuit means coupled with the dual coils to produce an output voltage which is a characteristic of the ratio of the voltage produced by one of the coils and the difference between the voltages produced by both of the coils. The invention also includes the method of obtaining a profile of the coil of the material throughout the entire length thereof.