Abstract: A novel transformer includes a first coil, at least one secondary coil magnetically coupled with the first coil and an electrically insulating holder. The first coil and the at least one secondary coil face each other with the holder therebetween. The holder has at least one through hole at a portion sandwiched between the first coil and the at least one second coil. The transformer also includes at least one electric insulating heat radiation member disposed in the at least one through hole in contact with the first coil and the at least one second coil. The heat radiation member has a higher heat conductivity than the holder.

Abstract: An isolated switch-mode power supply includes at least one input, at least one output, and a power circuit coupled between the at least one input and the at least one output for converting an input voltage or current to an output voltage or current. The power circuit includes a transformer having one or more primary windings, one or more secondary windings, an electrical insulator, and a core magnetically coupling the one or more primary windings and the one or more secondary windings. Upper portions of the primary and secondary windings are covered with the electrical insulator. Other example switchmode power supplies, transformers, magnetic chokes and methods are also disclosed.

Abstract: A stationary induction electric apparatus includes a porcelain tube, a connection conductor, a conductor, a casing, a lead, a terminal, a spacer, an electric connection member and a first and a second insulating medium. The connection conductor is disposed at one end of the porcelain tube. The conductor is disposed in the porcelain tube, and connected to the connection conductor. The casing covers a stationary induction electric apparatus main body, and has an opening part. The lead extends from the main body to the opening part. The terminal is disposed at an end part of the lead. The spacer seals the other end of the porcelain tube and the opening part. The member includes an electrode connected to the terminal and a joint part connected to the conductor, and penetrates the spacer. The first and second insulating media are respectively filled in the porcelain tube and the casing.

Abstract: A semiconductor apparatus comprising an integrated semiconductor circuit device having pluralities of electrode pads, pluralities of first external terminals connected to the electrode pads of the integrated semiconductor circuit device, an inductor disposed in a region surrounded by the first external terminals, and a resin portion sealing them, the integrated semiconductor circuit device being arranged on an upper surface of the inductor, and the inductor being exposed from a lower surface of the resin portion together with the first external terminals.

Abstract: A magnetic component may include a core including an upper collar, a lower collar, and a spool portion around which a lead wire is wound and external terminals which are directly disposed on the lower collar and to which both ends of the lead wire are connected. The external terminals may include a terminal end fixing portion. The terminal ends of the lead wire may be positioned by the terminal end fixing portions, and may be connected to the external terminals.

Abstract: An electromagnet for use in a relay having a coil bobbin with flange portions at both ends of a coil winding portion where a coil is wound and an iron core with a flange-like head portion at one end of a body portion, the coil bobbin being so fitted onto the iron core that the flange-like head portion and the other end of the body portion of the iron core respectively project out of each of openings formed at the flange portions of the coil bobbin. The iron core has at the other end an engageable portion to be engaged with an engaging portion formed on a grasping part of a coil winding chuck device. The electromagnet further has between the coil bobbin and the iron core a means for preventing misregistration of the coil bobbin fitted onto the iron core.

Abstract: An inductor includes a base and a winding assembly. The base includes an outer frame, a middle part and a connecting part. The outer frame has a first upper surface. The middle part has a second upper surface. The connecting part is connected with the outer frame and the middle part and has a third upper surface. The connecting part, the outer frame and the middle part collectively define a receptacle. The winding assembly is accommodated within the receptacle. The second upper surface of the middle part is disposed at a higher level with respect to the first upper surface of the outer frame. A first height is defined by the level difference between the second upper surface and the third upper surface. A second height of the winding assembly is smaller than the first height, so that a fourth upper surface of the winding assembly is disposed at a lower level with respect to the second upper surface after the winding assembly is accommodated within the receptacle.

Abstract: The invention is directed to a transformer and a method of manufacturing the same, wherein at least a portion of a core is disposed inside a shield case formed from a polymeric resin composition containing conductive particles. An encasement comprising a dielectric resin encapsulates the shield case. An electrical conductor is electrically connected to the shield case and is accessible from the exterior of the encasement.

Abstract: An inductance element is not interfered by peripheral circuits when mounted on a wiring board by forming a closed magnetic path. The inductance element has a small reduction of an inductance value when a direct current is superimposed, and thus has excellent direct current superimposition characteristics. The temperature coefficient of the magnetic permeability of a ferrite sintered body which constitutes a magnetic core can be positive. The temperature coefficient of the magnetic permeability of a soft magnetic resin provided as an external covering to cover a coil and to fill a space between flange sections of the magnetic core is permitted to be ?30 ppm/° C. or less.

Abstract: An apparatus for cost-effective and efficient cooling of an active element. The active element may be a magnetic element such as an inductor or a transformer having windings and a core. A thermally conductive vessel has a cavity that is adapted to conform to a surface of the active element, with a small gap remaining between the surface of the active element and the surface of the cavity. The winding is adapted to have a uniform surface, by utilizing an edge winding or a machined winding fabricated from an extruded tube. A thermally conductive encapsulant fills gaps in the apparatus to further improve cooling.

Abstract: A thin-film magnetic head structure has a configuration adapted to manufacture a thin-film magnetic head configured such that a main magnetic pole layer including a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole end part so as to form a recording gap layer on the medium-opposing surface side, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated. The main magnetic pole layer includes a base magnetic pole part comprising the magnetic pole end part and a base depression distanced farther from the medium-opposing surface than the magnetic pole end part, and an embedded magnetic pole part buried in the base depression and joined to the base magnetic pole part.

Abstract: Magnetic component assemblies including moldable magnetic materials including surface mount termination features, as well as manufacturing methods therefor, are disclosed that are advantageously utilized in providing surface mount magnetic components such as inductors and transformers.

Abstract: A transformer includes a bobbin, a first winding, a second winding, a core set and an insulating cover. The bobbin has a first winding area and a second winding area. The first winding and the second winding are wound around the first and second winding areas of the bobbin, respectively. The core set surrounds the first winding and the second winding. The insulating cover covers the bobbin and completely covers the core set except inserting sides of the core set.

Abstract: A micro power converter is provided in which magnetic flux passing outside of external electrodes and second connection conductors is decreased to reduce noises, and at the same time, adhesiveness of molding resin is preserved to provide excellent humidity resistance.

Abstract: A method and apparatus for overmolding a plastic shroud onto a bobbin including the step of providing a protrusion ring on the surface of the bobbin surrounding each standoff between the bobbin and a mold wall and extending outwards from the surface of the bobbin. A plurality of standoffs and protrusion rings is presently preferred. The protrusion rings are small relative to the standoffs, have low thermal mass, and thus are readily melted by the injected molten plastic, causing interstitching between the bobbin material and the overmolding material. The interstitching creates a highly effective hermetic seal against moisture leakage along the surface of the bobbin away from the standoff site. Perfect melting of the standoffs is no longer required, and standoffs can be designed to assure proper positioning of the bobbin during the complete overmolding process.

Abstract: An inductive coil assembly having multiple coils arranged at distinct orientations to provide efficient inductive coupling of power or communications or both to a device when the device is arranged at different orientations with respect to the inductive primary coil. In one embodiment, the inductive coil assembly includes three coils, each oriented along one of the x, y and z axes of a standard Cartesian three-dimensional coordinate system. The three separate coils provide effective transfer of power and communication when the device is at essentially any orientation with respect to the primary coil. In an alternative embodiment, the multi-axis inductive coil assembly of the present invention can function as a primary to inductively transmit power or communication or both over a plurality of magnetic fields at distinct orientations.

Abstract: A device for combining annular transformers with a machine housing includes a bolt to fix annular transformers on a machine housing and a saucer-shaped plate assembled on the outer side of the machine housing. The saucer-shaped plate is bored with a central insert hole for the bolt to pass therethrough and has its outer annular portion formed with a first plane and its inner annular portion formed with a second plane higher than the first one. The two planes are connected by an annular conical portion contracting gradually toward its upper side to be positioned in the machine housing. The bolt is orderly inserted through the saucer-shaped plate, the machine housing and the annular transformers to fix securely the annular transformers on the machine housing. The bolt has its head completely positioned in the conical portion of the saucer-shaped plate, not protruding out of the machine housing.

Abstract: The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloys, and oxides. The inductor is compatible with integrated circuit manufacturing techniques and eliminates the need in many systems and circuits for large off chip inductors. A sense and measurement coil, which is fabricated on the same substrate as the inductor, provides the capability to measure the magnetic field or flux produced by the inductor. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.

Abstract: An ignition assembly provides a current to a spark plug to combust fuel in a cylinder of an internal combustion engine. The ignition coil assembly includes a primary winding defining a central axis. A secondary winding is wrapped about the primary winding coaxial with the central axis. The ignition coil assembly also includes a central core extending through the primary winding coaxial with the central axis. The central core includes a plurality of core components each having a single exterior surface that is continuous. In addition, each of the single exterior surface extends through an arcuate path.

Abstract: The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloys, and oxides. The inductor is compatible with integrated circuit manufacturing techniques and eliminates the need in many systems and circuits for large off chip inductors. A sense and measurement coil, which is fabricated on the same substrate as the inductor, provides the capability to measure the magnetic field or flux produced by the inductor. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.

Abstract: The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloys, and oxides. The inductor is compatible with integrated circuit manufacturing techniques and eliminates the need in many systems and circuits for large off chip inductors. A sense and measurement coil, which is fabricated on the same substrate as the inductor, provides the capability to measure the magnetic field or flux produced by the inductor. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.

Abstract: The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloys, and oxides. The inductor is compatible with integrated circuit manufacturing techniques and eliminates the need in many systems and circuits for large off chip inductors. A sense and measurement coil, which is fabricated on the same substrate as the inductor, provides the capability to measure the magnetic field or flux produced by the inductor. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.

Abstract: A circuit module has a circuit board on which electronic components are mounted and a covering member which has a plate portion and one or more supporting portions. The supporting portions fix the plate portion parallel to the surface of the circuit board. The covering member can be chucked by a chucking device to mount the circuit module to a mother circuit board.

Abstract: A coil assembly comprises a bobbin for supporting a coil. The bobbin supports a metal ferrule. A metal bracket is releasably coupled to the bobbin. The bracket holds the ferrule in place. The ferrule and the bracket are arranged to cooperatively serve as a return path for magnetic flux. A method for assembling a solenoid valve may comprise the steps of coupling a flux return structure about a coil, connecting the coil to an electrical circuit, and orienting the coil about the armature of the valve.

Abstract: An ignition apparatus is received in a plug hole which is formed by a cylinder head and a cylinder head cover of an internal combustion engine. A side core has a slit between two horizontally extending side wall ends. The side core is selected from a laminated sheet structure comprised of two grain oriented silicon steel sheets, each having a slit between two horizontally extending side wall ends, and the plural slits align at substantially the same position. The slit prevents a one-turn short of a magnetic flux of the side core. Thereby a predetermined secondary voltage more than an engine requirement secondary voltage is obtained. An ignitor reception portion has an independent and individual ignitor reception portion and an independent and individual coil reception portion, with the ignitor reception portion and the coil reception portion being combined.

Abstract: An air-wound, coil-type, passive inductor includes a surface which allows the coil to be picked-up using a vacuum probe of a head of a pick-an-place machine and the surface does not interfere with adjusting the spacing between the loops of the coil for tuning the coil after the coil is attached to a circuit board. Terminal ends of the coil are placed on solder paste on interconnection pads on the circuit board, then the board is heated to reflow the solder, and then washed to remove the flux contained in the solder paste. The surface may be adapted to be removed or at least degraded by the heating, or the washing, or afterwards by a mechanical method of removal without damaging the coil.

Abstract: A high voltage transformer, especially for use in a microwave oven is provided. The high voltage transformer includes: a primary coil to which a commercial power supply is connected; a secondary coil for inducing a high voltage necessary for driving a magnetron of the microwave oven, with respect to the primary coil; a heater coil for inducing voltage necessary for heating a negative electrode of the magnetron, with respect to the primary coil; a core for forming a common magnetic path for the primary and secondary coils and the heater coil; and an insulation support including a side insulating member disposed between the primary, secondary and heater coils and the core, a bottom insulating member disposed between the bottom of the secondary coil and the core and a lead wire support integrally combined with the side insulating member and the bottom insulating member and formed with holes through which lead wires of the secondary coil pass.

Abstract: An ignition apparatus is received in a plug hole which is formed by a cylinder head and a cylinder head cover of an internal combustion engine. A side core has a slit between two horizontally extending side wall ends. The side core is selected from a laminated sheet structure comprised of two grain oriented silicon steel sheets, each having a slit between two horizontally extending side wall ends, and the plural slits align at substantially the same position. The slit prevents a one-turn short of a magnetic flux of the side core. Thereby a predetermined secondary voltage more than an engine requirement secondary voltage is obtained. An ignitor reception portion has an independent and individual ignitor reception portion and an independent and individual coil reception portion, with the ignitor reception portion and the coil reception portion being combined.

Abstract: A protective casing for a non-sheathing transformer has two downward extended arms suitable for inserting into two spaces between two lateral sides of a coil and two lateral inner edges of a steel core frame of the transformer and be retained thereto by two hook portions provided at lower ends of the arms, such that the protective casing is firmly covered over the non-sheathing transformer to protect the exposed coil thereof against any external damage.

Abstract: A microwave oven includes a compartment in which a magnetron and a high-voltage transformer are disposed. The transformer includes coils disposed within a core. The core has holes formed in its underside, which are aligned with respective through-holes formed in a bottom panel of the compartment. Bolts extend upwardly through the through holes and into the holes to secure the transformer directly to the bottom panel.

Abstract: A method of securing the bobbin assembly of a variable reluctance sensor within a hollow sensor shell having an opening in the front wall thereof to permit the magnet of the bobbin assembly to be exposed therethrough. A welding apparatus is provided for automatically ultrasonically welding the rear portion of the bobbin assembly to the open rear end portion of the shell, thereby preventing fluid flow through the rear end of the shell. The welding process forces the bobbin assembly into the sensor shell sufficiently to compress the front elastomeric seal between the front flange of the bobbin assembly and the inner surface of the front wall of the shell.

Abstract: A mini-transformer features an iron or ferrite core (2) and primary and secondary windings (3, 4). Portions of the windings (3, 4) which extend beyond the iron or ferrite core (2) are covered on both sides with a thermoplastic material forming a lid (6, 7). The two lids or end bells (6, 7) are combined into one piece by means of first bars (12), which extend through the hollow spaces (9) between the windings (3, 4) and the iron or ferrite core (2) and fill them, and that the laminated iron or ferrite core (2) is fixed in itself by second bars (14) connecting the two lids (6, 7).

Abstract: A switching power supply embodiment of the present invention includes a plastic leaded chip carrier (PLCC) that has two rectangular holes joined by a channel on the bottom surface that allow the PLCC to be surface mounted on a printed circuit board over a ferrite U-core section. A ferrite I-core section caps the ends of the U-core section above the top surface of the PLCC. A wire frame within the PLCC provides for several individual parallel conductor segments that pass between the two holes to rows of surface mount pins on opposite edges of the PLCC. Traces on the printed circuit board complete the connection of these conductor segments to form a primary winding of a transformer. A secondary winding is similarly constructed using pins on another edge of the PLCC.

Abstract: A coil contains a winding part and a core. The winding part is formed of plural laminated sheets each having a winding pattern. Plural winding patterns are formed on at least one sheet. Each of the winding patterns has a different number of turns, and the winding patterns are formed around the core so as to be coaxial in the same winding direction. The winding patterns formed on the other sheets are connected via a through-hole, and an end of the winding pattern is connected to an input/output portion formed outside of the sheet.

Abstract: A connecting member is fixedly mounted in a predetermined location so as to penetrate a closed space formed with a ferrite core, and an end of a first lead wire is inserted and connected with an engagement part formed at one end part of the connecting member, and an end of a second lead wire is inserted and connected with an engagement part formed at the other end part of the connecting member, thereby, the trigger winding is formed.

Abstract: A combination of a fastener with an electronic component, wherein the electronic component includes a bobbin having an axial portion, windings around the axial portion of the bobbin, external terminals projecting from the bobbin, around each of which external terminals a termination of one of the windings is coiled, a mold covering the bobbin in a manner to allow portions of the external terminals to be projected outwardly from the mold, the mold being formed of electrically insulating resin material, and a pair of cores assembled to the mold so as to be opposed to each other. The fastener fitted on the electronic component includes a first engaging member engaged in assembly with the cores to clamp the cores, a second engaging member engaged in assembly with a portion of the mold, and an interconnecting member interconnecting the first and second engaging members.

Abstract: A transformer assembly having a mounting plate of electrically conductive material An electrically conductive core of a transformer has an end mounted on the plate and electrically connected to the plate. A fastener on the plate engages an opening in a junction box. The plate provides an electrical connection between the core and the junction box to ground the transformer to the junction box. The transformer has a coil on the core, the coil having wires adapted to be connected to the terminal wires in the box. The plate and the fastener support the plate and transformer on the junction box.

Abstract: A double-insulated transformer of the coaxial type comprises a core assembly having a center core, a primary winding assembly assembled to surround coaxially the center core which has a primary bobbin case, a primary coil winding wound around the bobbin case and a primary terminal portion provided at an axial end of the bobbin case for connecting the primary coil winding and input lead lines, a secondary winding assembly to surround coaxially the primary winding assembly which has a secondary bobbin case, a secondary coil winding wound around the secondary bobbin case and a secondary terminal portion provided at an axial end of the secondary bobbin case opposite to the primary terminal portion for connecting the secondary coil winding with external lead lines, and an insulating case assembled to surround coaxially the secondary winding assembly.

Abstract: A transducer is disclosed for detecting an electrical pulse from a circuit and for generating an output signal in response to each pulse. The transducer includes a first electric coil having two ends adapted for connection with the circuit and a second electric coil having two ends on which the output signal is generated. The coils are coaxially wound together and a rod constructed of a ferromagnetic material is positioned through the rod. A housing also constructed of a ferromagnetic material includes two spaced end portions which contact the opposite ends of the rod. The housing also includes locking tabs which engage and lock the housing to opposite ends of the rod.

Abstract: A transformer assembly (10) for use as a self-contained auxiliary power supply in complex machine tool applications is disclosed as having a core (16) with a first side (18), a second side (20) and a plurality of coils (21, 22, 23). Attached to the first side (18) of the core (16) is a first hollow housing (30). A second hollow housing (34) is attached to the second side (20) of the core (16). The core (16) has side edges (28) extending between the first and second sides (18, 20) thereof for effective removal and dissipation of heat generated by the transformer assembly (10). A plurality of electrical components (38) are mounted at least partially within one or more of the hollow housings (30, 34) to provide compact accommodation of the electrical components (38) by the transformer assembly (10) so that the latter occupies a minimal volume within a control panel in the complex machine tool.

Abstract: A transformer assembly (10) for use as a self-contained auxiliary power supply in complex machine tool applications is disclosed as having a core (16) with a first side (18) and a second side (20). Attached to the first side (18) of the core (16) is a first hollow housing (30). A second hollow housing (34) is attached to the second side (20) of the core (16). The core (16) has lateral side edges (28) extending between the first and second sides (18, 20) thereof for effective removal and dissipation of heat generated by the transformer assembly (10). A plurality of electrical components (38) are mounted at least partially within one or more of the hollow housings (30, 34) to provide compact accommodation of the electrical components (38) by the transformer assembly (10) so that the latter occupies a minimal volume within a control panel in the complex machine tool. Accordingly, the assembly so described is significantly smaller and less costly than conventional auxiliary power supplies.

Abstract: A bobbin case for use in a transformer of the double-insulated type comprises an insulating member of tube-like shape, a partition wall disposed substantially normal to the axis of the insulating member so that the inner space of said insulating member is divided into two recesses for receiving primary and secondary winding assemblies, respectively, from the opposite directions along the axis of said insulating member, and a pair of insulating rims which extend from the outer end surfaces of the insulating member at the side of the recess for receiving the primary winding assembly. The pair of insulating rims are formed such that they are capable of being bent inwardly along the outer end surfaces so as to obtain a creeping distance between said primary winding and a core inserted into center holes in said winding assemblies. By using the bobbin case, the insertion of the primary and secondary winding assemblies can easily and efficiently be carried out.

Abstract: A transformer assembly (10) for use as a self-contained auxiliary power supply in complex machine tool applications is disclosed as having a core (16) with a first side (18) and a second side (20). Attached to the first side (18) of the core (16) is a first hollow housing (30). A second hollow housing (34) is attached to the second side (20) of the core (16). The core (16) has lateral side edges (28) extending between the first (18) and second sides (20) thereof for effective removal and dissipation of heat generated by the transformer assembly (10). A plurality of electrical components (38) are mounted at least partially within one or more of the hollow housing (30, 34) to provide compact accommodation of the electrical components (38) by the transformer assembly (10) so that the latter occupies a minimal volume within a control panel in the complex machine tool. Accordingly, the assembly so described is significantly smaller and less costly than conventional auxiliary power supplies.

Abstract: A surface-mounted-type inductance element comprising a coil structure having a bobbin; the bobbin including a portion around which wires are coiled, a pair of flanges integrally formed at opposing ends of the bobbin, a pair of bases integrally formed at lower edge portions of the flanges in a manner to project laterally from the flanges, and a plurality of external terminals attached to each of the bases in a manner to penetrate the base, each the external terminal including a first portion projecting laterally from the base and a second portion projecting downward from the base, around which first portion of each the external terminal a termination of any one of the wires is wound; a mold covering the coil structure in a manner to allow the second portions of the external terminals to be projected outward from the mold, the mold being formed of resin material exhibiting heat resistance; and a pair of cores assembled to the coil structure through the mold.

Abstract: An ignition coil assembly for internal combustion engine has a voltage withstanding air gap of a predetermined shape and an insulating resin cover for covering the external iron core provided in addition to resin mold and partitioning wall in order to electrically insulate from the secondary coil the external iron core constituting a magnetic path together with the internal iron core.

Abstract: The invention provides an electric transformer for microwave ovens including a conventional magnetic circuit with three columns, and electric circuits insulated by carcases and covers made from an insulating material. The secondary carcase forms a particular housing for the secondary heating winding so that the secondary high voltage winding and the secondary heating winding are partially superimposed. Thus an excellent electric insulation is provided without loss of space.

Abstract: An ignition coil assembly for an internal combustion engine includes at least one first laminated core contained in a housing and having a plurality of first magnetic path connection end faces exposed to the inside of the housing, and at least one second laminated core having a plurality of second magnetic path connection end faces each opposing to one of the first magnetic path connection end faces through a thin gap. A primary coil and a secondary coil are wound on the second laminated core, and a plurality of soft waterproof layers are formed on inner walls of the housing to cover the first magnetic path connection end faces of the first laminated core.

Abstract: An electrical transformer having a rectangular core of solid magnetic material, forming a circular or rectangular-section shell in which primary and secondary windings are located. The corners of the core may be open to lighten the transformer and increase heat dissipation. A capacitor may be connected across the secondary winding to increase the efficiency of the transformer.

Abstract: A miniaturized transformer which is constructed so that lead wires of a coil are first upwardly led out of the coil and then downwardly extended to be used as terminals for the transformer.

Abstract: An ignition coil assembly for an internal combustion engine includes at least one first laminated core contained in a housing and having a plurality of first magnetic path connection end faces exposed to the inside of the housing and at least one second laminated core having a plurality of second magnetic path connection end faces each opposing to one of the first magnetic path connection end faces through a thin gap. A primary coil and secondary coil are wound on the second laminated core, and a plurality of soft waterproof layers are formed on inner walls of the housing to cover the first magnetic path connection end faces of the first laminated core.