Abstract: An apparatus for facilitating mounting of an inductor assembly to a printed circuit board that is easy to assemble into any mounting scheme and which assures that an adequate clamping force to overcome vibration forces is provided. The apparatus includes an inductor assembly, a spacer assembly adapted to receive the inductor assembly, a wedge member for engaging one side of the inductor assembly and for distributing a clamping force substantially evenly about the inductor assembly, and a bushing disposed through each of the inductor assembly, the spacer assembly, and the wedge member, such that when a clamping force is applied to the wedge member, the inductor assembly is clamped to the spacer assembly.
Abstract: An area on which a coil part is formed on part of a substrate is secured, coil patterns are provided on a plurality of unit substrates corresponding to the area, the coil patterns of the laminated unit substrates are connected by a through hole to form the coil part, thereby resulting in miniaturization, reduction of the number of assembling processes, reduction of cost, noise prevention, and improvement of reliability. Heat radiation patterns are provided in unitary form on the coil patterns to secure a sufficient heat radiation property.
Abstract: A coil former for a flat coil comprises a plurality of printed circuit boards that are stacked on top of each other and carry one or several turns. At least one straight row of electrically conductive pins is arranged along the edge of a supporting plate which is made of insulating material. The pins are adapted to interconnect the strip conductors on the printed circuit boards and/or to connect the strip conductors with other components. The pins project in the direction towards the printed circuit boards. The pins are spaced apart according to a predetermined grid pitch. The supporting plate has a first recess for receiving a leg of a magnet. Further, the supporting plate is connectable with a cover having a second recess aligned with the first recess on the supporting plate.
Abstract: A noise absorber capable of preventing a cable from becoming damaged with a high degree of reliability while demonstrating outstanding noise absorbing characteristics is provided with a cover 1 and a pair of ferrites 21 and 22. The cover 1 is constituted through the combination of a first cover 11 and a second cover 12. The first cover 11 is provided with a ferrite storage portion 110 and a cable storage portion 111. The second cover 12 is provided with a ferrite storage portion 120 and a cable storage portion 121. The ferrite storage portion 110 is formed at an internal surface of the first cover 11 and the ferrite storage portion 120 is formed at an internal surface of the second cover 12. The cable storage portion 111 is formed adjacent to the ferrite storage portion 110 at a side thereof, whereas the cable storage portion 121 is formed adjacent to the ferrite storage portion 120 at a side thereof.
Abstract: A high energy inductor and method of manufacture relates to an inductor which is capable of mechanically withstanding the high magnetic forces imposed thereon during transfer of high energy pulses. The inductor is wound with a conductor under tensile stress, wherein the conductor has a fixed inner end and a free outer end. The stress is maintained in the finished inductor by means of a clamp attached to and fixing the free end of the conductor. The fabrication method involves inducing tensile stress in the conductor as it is wound on an inductor core and then maintaining the conductor tensile stress in the finished inductor component.
June 27, 1997
Date of Patent:
June 15, 1999
United Defense, LP
Charalampos D. Marinos, Thomas M. Pfenning
Abstract: A wire-wound inductor includes a dielectric core, terminals including wire staples that are crimped around the core, and a wire winding disposed about the perimeter of the core and connected to the terminals. A coating such as an adhesive coating is disposed over the wire winding and between the terminals. The process for manufacturing the inductors in a continuous process. Beginning with a spooled material, which may be extruded, inductors are formed on a core material sequentially. The inductors are not physically separated until the final stages of manufacturing, which is in contrast to the prior art method in which each inductor is individually constructed on an individual core that has been manufactured with tight tolerances and wound individually. By virtue of the characteristics of the inductor components, extremely tight tolerances (typically about 0.0005") can be obtained, resulting in highly controlled inductance values.
December 30, 1996
Date of Patent:
May 11, 1999
Ross Warren Lampe, Jr., Gerard James Hayes
Abstract: An electric noise suppressor is provided for suppressing high-frequency electric noise which comprises a thermoplastic housing and two ferrite members disposed therein. The thermoplastic housing is formed from two hingedly connected case halves, which are substantially identical. A ferrite member is secured to each case half by a laminated compressible adhesive-foam element, which is comprised of a resilient foam core layer and opposing adhesive layers disposed thereabout. Due to the resiliency of the foam core layer, the ferrite members are pressed into tight engagement within the thermoplastic housing. The end walls of the thermoplastic housing are formed with circular apertures, which are each formed with a diameter which is slightly smaller than the diameter of the cable which is engaged by the electric noise suppressor. The dimensional differences between the cable and the apertures allows the end walls to grippingly engage the cable at a predetermined location.
Abstract: A molding structure for a flyback transformer is disclosed and includes a basic bobbin member having a primary coil wound on an outer circumferential surface thereof, a film guide formed on both end portions of the basic bobbin member and having a gas exhaust holes, said film guide supporting more than one insulation film wound on an outer circumferential surface of the primary coil and more than one secondary coil, a bobbin including a ferrite core insertion member having a resin receiving space portion, and a casing receiving the bobbin therein and having a lead connection portion having a lead connection portion protrusion formed on an inner circumferential surface, wherein a high voltage lead is inserted into the upper portion of the casing.
Abstract: A soft magnetic alloy thin film includes a fine crystalline phase and an amorphous phase. The fine crystalline phase includes an average crystalline grain size of 10 nm or less in diameter and has body-centered cubic structure mainly composed of Fe. The amorphous phase has a nitrogen (N) compound as the main composition and occupies at least 50% of the structure of the thin film. An element M is incorporated at least in the amorphous phase, and includes at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, W, and rare earth metal elements. A plane-type magnetic device is made using this thin film.
Abstract: A surface mountable electronic device comprising a body incorporating an electronic device and having a substantially planar mounting surface and another surface extending from the mounting surface, at least one electrical lead extending from the device, and a terminal of conductive material having a first portion fixedly received in the body and extending through the other surface, a second portion extending from the first portion and electrically connected to the lead and a third portion extending along the mounting surface for providing electrical connection to a circuit. A recess preferably is provided in the other surface of the body for receiving the first portion of the terminal.
Abstract: A transformer with laminated sheet cores consists of a coil bobbin having a core hole, and a plurality of laminated sheet cores, each having a middle leg inserted into the core hole and a fixing member such as a cover fixed to the coil bobbin, receiving the ends of the sheet cores so as to prevent the sheet cores from being removed from the cover. The laminated sheet cores are fixed to the core bobbin without being pressed in the direction of their total thickness and without lowering the core characteristic. The transformer has a smaller number of the cores and can be manufactured at smaller processes.
Abstract: A coil bobbin has first and second end flanges with the first end flange being provided with a projection which receives terminal pins, and this projection is received in a longitudinal extending gap in a yoke ring when the bobbin is inserted therein. To form an aligned firm seating of the coil bobbin in the yoke ring, the second end flange of the bobbin is provided with a radially extending web which forms a press fit with the gap of the yoke ring.
Abstract: An apparatus for connecting primary conductive lines of a flexible transformer which assures the simple and reliable connection between the primary conductive lines. The apparatus includes a circular rigid supporting plate having an opening at the center thereof, a connecting member having an opening at the center thereof fabricated of a flexible insulator sheet having one surface where the supporting plate is adhered and the other surface where a plurality of radial conductive lines are deposited. The connecting member has a plurality of projecting portions at inner and outer peripheral edge portions thereof by cutting out the inner and outer peripheral edge portions where the radial conductive lines are not deposited. The projecting portions are folded to connect inner and outer parallel primary conductive lines.
Abstract: A choke coil is disclosed which exhibits sufficient capability in suppressing both common-mode noise and normal-mode noise with a small number of parts. A bobbin is formed of a rod and flanges provided for the rod. A pair of windings are reeled around the rod. Further, one side of a hollow-rectangular integral-type magnetic core is inserted into a hole formed in the rod of the bobbin. The heights of the flange of the bobbin are set as L2 in the upward direction, while the heights of the flange of the bobbin are determined as L1 in the downward direction (as illustrated) with L1>L2, i.e., the heights of the flange are varied in the directions along the outer peripheral surfaces of the flange.
Abstract: A winding core is formed by extruding a kneaded material to be obtained by kneading a powdered magnetic material and a binder. A plurality of bundled conducting wires are wound around the winding core into a coiled shape. An external cover element is formed by extruding the kneaded material to enclose the plurality of conducting wires. The winding core and the external cover element are sintered such that the plurality of bundled conducting wires wound around the core into a coiled shape are deformed into a zigzag manner by the stress due to shrinkage of the external cover element at the time of sintering thereof. The partially manufactured product obtained by the preceding steps, is cut into a predetermined length to thereby obtain a plurality of chip inductor main bodies. An external electrode is formed on each of end surfaces of the respective chip inductor main bodies. The external electrode is connected to each end portion of the conducting wires.
Abstract: A D.C. reactor has a core structure having two opposed cores separated by a magnetic gap, to form a closed magnetic circuit. A coil is wound on one or both of the cores. A pair of permanent magnets for biasing are disposed on the core structure. The bias flux generated by the permanent magnets and the flux generated by the coil to flow in opposite directions. Bypass means for causing the bias flux generated by the permanent magnets to bypass the magnetic gap are provided. In an embodiment the core structure comprises an E-shape core and an I-shaped core, the magnetic gap is defined between a center leg of the E-shaped core and the I-shaped core, the coil is wound on the center leg of the E-shaped core, and each permanent magnet is shaped as a rectangle and disposed on both side surfaces of the center leg of the E-shaped core.
Abstract: A transformer bobbin has margining ledges disposed on either side of a primary winding surface such that a primary wire is wound between margining surfaces of the margining ledges. L-shaped grooves extend into the margining ledges and then parallel to the primary winding surface to accommodate the primary wire ends that connect to terminals of the bobbin. Margining of the secondary is accomplished with a pair of margining bibs which attach to the bobbin after the primary is wound and after a layer of insulation is placed over the primary. The secondary is wound over the insulation layer between margining surfaces of the bibs. With the margining ledges and bibs, required creepage distances can be maintained without the use of sleeving, margining tape, interlayer tape or holding tape.
Abstract: A toroidal shaped transformer having two levels of structureborne noise isolation is disclosed. A 30-60 dB reduction in noise is achieved by isolation mounting the toroidal transformers coaxially on a central support rod which in turn is supported by an isolation mounted cradle. The isolation layers are made of compliant elastomeric foam rubber material.
February 22, 1996
Date of Patent:
September 29, 1998
Lockheed Martin Corporation
George Edward Dailey, Thomas E. Hatton, Rene D. Mock, Frederick Oswald Volles
Abstract: A high frequency water cooled transformer for coupling a power source to an induction heating coil and which serves to convert the output of the power source into values appropriate for the induction heating coil, and to match the impedance of the power source with the impedance of the heating coil for maximum power transfer efficiency. The primary of the transformer is adapted to be connected to the power source and the secondary is adapted to be connected to the induction heating coil. The transformer includes a secondary formed of two parallel self-supporting elongated open-ended hollow electrically conductive cylindrical members. A pair of electrically conductive terminal blocks are respectively mounted on one of the ends of the cylinders and electrically connected to the cylinders. The primary winding is wound longitudinally through the two secondary cylinders, and the ends of the primary winding are connected to appropriate terminal pins.
Abstract: Disclosed herein is a planar magnetic element comprising a substrate, a first magnetic layer arranged over the substrate, a first insulation layer arranged over the first magnetic layer, a planer coil formed of a conductor, having a plurality of turns, arranged over the first insulation layer and having a gap aspect ratio of at least 1, the gap aspect ratio being the ratio of the thickness of the conductor to the gap between any adjacent two of the turns, a second insulation layer arranged over the planar coil, and a second magnetic layer arranged over the second insulation layer. When used as an inductor, the planar magnetic element has a great quality coefficient Q. When used as a transformer, it has a large gain and a high voltage ratio. Since the element is small and thin, it is suitable for use in an integrated circuit, and can greatly contribute to miniaturization of electronic devices.