Abstract: A plastic case surrounds a primary winding of a multicharge ignition system, and has a rib in which the high voltage end is routed back to the low voltage end, so that the low and high voltage ends can be closely juxtaposed with each other while advantageously permitting the primary winding to have one and only one winding layer to reduce resistance and size. The rib of the case extends into the slot of the magnetic shields of the winding.

Abstract: An ignition coil, in particular for an internal combustion engine of a motor vehicle, has an inner magnet core which is concentrically enclosed by a primary coil and a secondary coil. The inner magnet coil is made up of sheet-metal strips stacked on top of each other, the sheet-metal strips forming a substantially rectangular or square cross-section surface of the inner magnet core. At least the lower and the upper sheet-metal strips, delimiting the inner magnet core, have, at least in partial areas, a reduced width viewed in the longitudinal direction compared to the other sheet-metal strips of the inner magnet core. This makes a primary bobbin and a secondary bobbin having an enlarged corner radius and a more uniform winding density of the primary coil and the secondary coil possible.

Abstract: A discharge lamp lighting apparatus includes a transformer unit, a casing for housing the transformer unit, and a circuit board including circuit components. In the casing, the circuit board is joined to the casing and the transformer unit is fixed to the circuit board through a heat conductive member having thermal conductivity of more than 0.1 W/(m·k). Heat produced by the transformer unit is transferred to the casing through the heat conductive member and released through the casing effectively. In the lighting apparatus, therefore, while the transformer unit is arranged relatively close to the circuit components, the heat can be prevented from affecting the circuit components.

Abstract: In one embodiment, a choke coil has a magnetic core, a coil, and magnetic material. The core has a first permeability which is from about 350 to 1200. The coil is wrapped around the core. The magnetic material surrounds the coil and has a second permeability. The first permeability is higher than the second permeability. The second permeability is from about 5 to 30.

Abstract: An electrical inductor has at least one wire wound core. When the wire wound core is placed within the shell at least one cavity is present. This cavity is filled with a powder to provide the inductor with better thermal and electrical properties.

Abstract: An element for use in an inductive coupler for downhole components comprises an annular housing having a generally circular recess. The element further comprises a plurality of generally linear, magnetically conductive segments. Each segment includes a bottom portion, an inner wall portion, and an outer wall portion. The portions together define a generally linear trough from a first end to a second end of each segment. The segments are arranged adjacent to each other within the housing recess to form a generally circular trough. The ends of at least half of the segments are shaped such that the first end of one of the segments is complementary in form to the second end of an adjacent segment. In one embodiment, all of the ends are angled. Preferably, the first ends are angled with the same angle and the second ends are angled with the complementary angle.

Abstract: An ignition coil includes primary and secondary coils accommodated in a coil case extending to define a cylindrical mount portion on a high voltage side. The mount portion includes a high voltage terminal electrically connected with the secondary coil. A coil spring electrically connects the high voltage terminal with a sparkplug. An electrically insulative plug cap is attached to the mount portion. The coil spring has a low voltage end electrically connected with the secondary coil via the high voltage terminal. The coil spring has a high voltage end in contact with a terminal of the sparkplug. The coil spring has an intermediate portion between the low voltage end and the high voltage end. The plug cap has a spring support portion, which is partially defining the fitting hole and restricting the intermediate portion of the coil spring from being radially deformed.

Abstract: An electromagnetic assembly which has a base, at least one winding, and a magnetic core connected to the base, where at least one winding is mounted on the magnetic core. A housing part encloses at least part of at least one winding, and a printed circuit board is mounted to the housing part. The electromagnetic assembly can be a transformer or inductor, for example.

Abstract: A transformer comprises a core formed by laminations, each having a rectangular plate with two spaced windows for receiving a set of coils passing through the windows in turn; a pair of terminal supports made of dielectric material, the supports extending through the core laminations down to the bottom thereof and being terminated by L-shaped brackets for mounting on the surface of the circuit board, the brackets spanning the width of the transformer and carrying two arrays of pins extending from the output transformer for providing connections of the coil ends with other components of the electronic device; a hexahedron mold block of thermoplastic resin with glass fiber for encapsulating the transformer leaving the pins for electrical connections.

Abstract: An ignition coil includes a coil body, a plug connection portion protruding from the coil body, and a connector for electrically connecting the ignition coil to an outside. In the coil body, a primary coil is arranged on an inner peripheral side of a secondary coil, and a center core is arranged on an inner peripheral side of the primary coil. The secondary coil includes a secondary electric wire having thereon an insulating film, wound around an outer periphery of a resinous secondary spool. Furthermore, the connector is formed integrally with an end of the secondary spool in an axial direction.

Abstract: A method of arranging and fabricating parallel primary and secondary coils of a wideband planar transformer is provided. The spacing and width of the coils are disposed to extend the bandwidth from DC to GHz and allow for high frequency coupling when the core permeability dramatically drops and achieves low reflected energy and low loss over a wide bandwidth. A bottom mold having a pattern of hole-pairs with conductive elements inserted vertically couples to a top mold such that a middle portion of the conductive elements spans between the top and bottom molds. Dielectric material envelopes the middle portion and a displacement feature of the mold creates a vacancy. A ferrite element is deposited to the vacancy. A second top mold spans the bottom mold and dielectric material is deposited to create a molded assembly. A deposited patterned conductive coating connects the element ends to define the transformer coils.

Abstract: A high-strength ignition coil that can prevent distortion arising from pin marks formed on a surface of a core and makes it less likely for insulating resin to be cracked. The coil assembly is housed in a coil case. A casting material is filled into a gap between the coil case and the coil assembly and gaps which the coil assembly has. The coil assembly is comprised of a coil pair including a cylindrical primary coil and a secondary coil disposed concentrically with the primary coil, and a core. The core is fitted into a central space of the coil pair and forms a magnetic path. The core is coated with mold resin. Concave portions of pin marks formed on a mold resin coating by removal of core fixing pins when the mold resin coating is formed are filled with mold resin.

Abstract: An electrical connection set-up for connecting thin enameled wires in ignition coils, which is to replace thermal methods, for example. This is achieved in that, to produce contacting between the winding and the respective high-voltage or low-voltage outlets, an individual contact element able to be slid over the winding by its one side and is fixed in place via its other side, the contact element having a spring-type design, a sliding surface, and at least on its one side fans out in a tulip-shape in the sliding direction, in such a way that the contact element presses against the winding in a spring-like manner in the mounted state and the insulation layer is ruptured and electrical contacting takes place.

Abstract: An ignition coil, which includes a primary coil and a secondary coil, has an electrical insulating member. The electrical insulating member includes an insulating material being a base material. The electrical insulating member further includes a reactive agent being an additive added to the insulating material for causing dehydration-decomposition, so as to enhance durability when being applied with high voltage. Alternatively, a reactive agent is coated on a surface of the electrical insulating body for causing dehydration-decomposition, so as to enhance durability when being applied with high voltage.

Abstract: An ignition coil for an internal combustion engine has a rod-shaped magnetic core, which collaborates with a cushioning element in the axial direction. The magnetic core and the cushioning element are furthermore inserted into a secondary coil shell. Moreover, the coil shell has an ignition coil housing, which is filled at least partially with an epoxy resin. In order to avoid that the epoxy resin gets into the gap between the coating and the magnetic core, the cushioning element is developed as a sealing element at the same time. At the same time, the secondary coil shell has a coating on its inner wall for the accommodation of radial stresses. The ignition coil thus designed is developed to be relatively compact, and has good thermomechanical properties.

Abstract: An inductance device has a hollow center coil around which a conducting wire is wound so that a hollow portion is formed along a center axis line of the hollow center coil, a filler which is filled into the hollow portion of the hollow center coil, and includes magnetic powder or a compound including the magnetic powder, and an accommodation case which accommodates the hollow core coil and has a bottom, wherein the filler is filled into the accommodation case.

Abstract: This invention relates to a transformer and more particularly, to a system and method for making a transformer utilizing dynamic magnetic compaction. A coil is placed in a conductive container, and a conductive powder material, such as ferrite, is placed in the container and surrounds the coil and the turns of the coil. A power supply energizes a capacitor which subsequently provides a high energizing current to a second, energizing coil within which the container, material and inner coil are situated, thereby causing the container, powder materials and coil to be compacted to provide an electrical component, such as a transformer, motor, commutator, rotor or choke.

Abstract: The invention is directed to a transformer and a method of manufacturing the same, wherein a core and coil assembly is disposed inside a protective case having an exterior surface that is at least partially covered with a conductive coating. An encasement comprising a dielectric resin encapsulates the protective case. An electrical conductor is electrically connected to the conductive coating and is accessible from the exterior of the encasement.

Abstract: A twin spark ignition apparatus having two high-voltage (HV) outputs incorporates features for balancing load capacitance on each HV output. The ignition apparatus provides a first high-voltage (HV) connection configured for direct mounting on a first spark plug, and a second HV connection for coupling to a second spark plug by way of an HV cable. The HV cable adds capacitance at the second HV output, as compared to a direct mount. The secondary winding is shifted by a predetermined distance, relative to the primary winding, in direction toward the direct mount end of the ignition apparatus. The shifting reduces the internal load capacitance at the second end (top), so that when the capacitance added by the HV cable is considered, the respective load capacitances are balanced. The voltage variation between the two HV outputs is reduced.

Abstract: A holding structure includes a held member located in a case, and a guiding space defined between the held member and a predetermined inner surface of the case. A primary molding resin is guided into the guiding space upon injection of the primary molding resin such that the held member is held in the case.

Abstract: An ignition coil includes a coil portion that has a primary coil, a secondary coil, and an outer core. The outer core is arranged on a radially outer side of both the primary coil and the secondary coil. A fitting member, which is in a substantially cylindrical shape, has an inner periphery via which the fitting member is fitted to the outer core. A connector case has a fit hole via which the connector case is fitted to an outer periphery of the fitting member. The connector case connects with an axial end of the coil portion via the fitting member. The fitting member includes an embedded member that is at least partially embedded in the fitting member. The embedded member is formed of a material that is different in Young's modulus from a material constructing the fitting member.

Abstract: In a preferred embodiment, a fixture for magnetizing axially alternating N and S poles defined circumferentially in a portion of an outer periphery of an axially extending, cylindrical, smooth shaft, the fixture including: a hollow cylindrical mandrel formed from a non-magnetic, non-electrically-conducting material; a conductive wire disposed in parallel, circumferential channels defined in an outer surface of the mandrel; a potting compound surrounding the mandrel to secure the conductive wire in place; and a central bore defined axially and centrally through the mandrel and exposing or nearly exposing the conductive wire; and the central bore being sized to accept axially inserted therein the portion of the axially extending, cylindrical, smooth shaft. Methods of using and manufacturing the fixture are also provided.

Abstract: The present invention relates to an ignition coil for ignition systems, in particular a rod ignition coil for internal-combustion engines, comprising at least one primary winding and at least one secondary winding, a high voltage being induced in the secondary winding when current flows in the primary winding. A ferromagnetic core is surrounded in part by the primary winding and the secondary winding and one of the two windings is additionally surrounded at least in part by the other. To provide an improved ignition coil which ensures increased reliability in operation and energy efficiency and a reduced risk of overheating during operation, at least one of the windings comprises at least one portion having an elevated winding density relative to the remaining winding density, the diameter of the innermost turns in the at least one portion being smaller than the diameter of the innermost turns in the remaining winding portions.

Abstract: An ignition coil includes a coil portion that has a primary coil, a secondary coil, and an outer core. The outer core is arranged on a radially outer side of both the primary coil and the secondary coil. A fitting member, which is in a substantially cylindrical shape, has an inner periphery via which the fitting member is fitted to the outer core. A connector case has a fit hole via which the connector case is fitted to an outer periphery of the fitting member. The connector case connects with an axial end of the coil portion via the fitting member. The fitting member includes an embedded member that is at least partially embedded in the fitting member. The embedded member is formed of a material that is different in Young's modulus from a material constructing the fitting member.

Abstract: A transformer (10), coupled to a circuit board (20) defining a receiving hole (210), includes a base (110) having a first end portion (110a) and an oppositely disposed second end portion (110b), a bobbin assembly (120) disposed between the first end portion and the second end portion, and a post (140) disposed on the base. The post is received in the receiving hole for positioning the transformer on the circuit board.

Abstract: An ignition coil includes a cylindrical portion capable of being inserted into a plughole of an engine case. The cylindrical portion has a base end and a tip end, respectively, in an axial direction of the cylindrical portion. The cylindrical portion has an elastically deformable outer peripheral portion that engages with the plughole to fix an outer periphery of the cylindrical portion with respect thereto.

Abstract: Inductive component (10; 20; 30) having at least one coil (12; 22; 32) and a magnetically soft core (11; 21; 31) made from a ferromagnetic powder composite in which the ferromagnetic powder composite shows an alloy powder mixture made from alloy powders having formanisotropic as well as formisotropic powder particles and a casting resin.

Abstract: To provide an ignition device for an internal combustion engine which for example prevents a crack from being made in a cast insulating resin or a transformer output voltage control element from being damaged.

Abstract: An ignition coil apparatus for an internal combustion engine can suppress an increase in the manufacturing cost of a terminal of a low-tension side connector resulting from variation in a wire diameter of an one end of a primary winding, and can ensure a stable fusing state. The positive terminal side fusing portion is composed of a planar portion and a turned portion that is inversely turned back from the planar portion to cooperate therewith to clamp a winding start conductor portion. A first bent portion of a radius of curvature R is formed at a base end portion of the turned portion. A second bent portion with its tip end tilted toward a planar portion is formed at an intermediate portion of the turned portion.

Abstract: The ignition coil includes an exciting core having a substantially I-shape, and a closed magnetic path forming core having a substantially C-shape. The ignition coil is constructed in such a manner that first contact faces are formed by a first face of the exciting core and a first face of the closed magnetic path forming core, and a permanent magnet is arranged between these first contact faces, while second contact faces are formed by a second face of the exciting core which is directed to a different direction from the aforesaid first face and a second face of the closed magnetic path forming core which is directed to a different direction from the aforesaid first face.

Abstract: A transformer has a bar-shaped ferrite core, an inner winding wound directly around the ferrite core, an outer winding wound over the inner winding, and a dielectric shield surrounding the outer winding. The outer winding has its circumference covered by a dielectric sheath, and has an intermediate winding portion between its winding start end and its winding stop end. The dielectric sheath in the intermediate winding portion is spaced from each other along the axis of the ferrite core to leave thereat a gap which is filled with a molding material. By provision of the gap between the dielectric sheath of the outer winding, the molding material forming the dielectric shield can be easy to flow in between the dielectric sheath of the outer winding and the inner winding, avoiding the void from appearing between the inner and outer windings for attaining stable electrical characteristic.

Abstract: To optimize the package dimensions of pencil-style ignition coils, a structural component including a primary wire and a primary bobbin is constructed in such manner that this structural component is also used as the encapsulation layer of the ignition coil.

Abstract: A switchgear, especially for actuating valves, includes a housing (18) and a coil body (10) disposed in the housing. A switch element is guided in the coil body. The coil body is provided with a winding (14) of a conductor (16) that is connected to a plug connector (22) via contact elements (20). At least some sections of the housing (18) and of the plug connector (22) are enclosed by a plastic compound (24). Sealing devices (40) seal off the interior (42) of the switchgear from the surroundings (44). At least one of the sealing devices (40) is configured as a sealing web (48) of a meltable material. The sealing web (48) is disposed on the bottom face (50) of a plug plate (26) of the plug connector (22) which faces the housing (18).

Abstract: An ignition coil for an internal combustion engine has a first housing, a second housing, a holder, an insulating resin and a crack extension restrictor. The first housing encloses a center core, a primary coil and a secondary coil. The second housing has an install portion and a cylinder-shaped fitting portion fitted to a top cylindrical portion of the first housing. The holder is laid over top ends of the primary and secondary coils. The insulating resin is charged in an annular cavity defined at least by uppermost portions of the primary and secondary coils, the fitting portion and the holder and in contact with the fitting portion. The crack extension restrictor is formed by a part of the fitting portion and a part of the holder and disposed above the fitting faces of the fitting portion and the top end portion.

Abstract: A stick-type ignition coil comprises a coil part, an insulating ring-shaped terminal assembly and a control part. The coil part includes a central core, a primary coil and a secondary coil. The terminal assembly is press-fitted on the upper end part of a primary spool of the primary coil. The terminal assembly has a primary terminal for holding a pair of ends of the primary winding of the primary coil, and an on-voltage suppressing diode connected between the primary and the secondary windings. The control part includes an insulating upper case press-fitted on the terminal assembly and an igniter disposed in the upper case.

Abstract: The present invention relates to a field coil assembly of an electromagnetic clutch for a compressor, in which a coil wire of an electromagnetic coil body exposed to a protrusion of a bobbin is electrically connected with a compressing portion of a coil wire formed at one side end portion of terminals mounted inside a sleeve, and the terminals and the electromagnetic coil body are molded with the resin, thereby preventing permeation of foreign matters from the outside, preventing disconnection of the coil wires due to vibration, and simplifying a manufacturing process.

Abstract: An ignition coil includes a center core, a secondary coil, a primary coil, and an outer core. The secondary coil and the primary coil are substantially coaxially arranged on the outer circumferential side of the center core. The secondary coil includes a secondary winding that is wound around a secondary spool. The secondary spool has a high voltage bracket that includes a secondary terminal. The primary coil includes a primary winding that is wound around a primary spool. The outer core is arranged on the outer circumferential side in the ignition coil. The secondary terminal includes a first connecting portion, which is in a bulb shape, in the tip end. The first connecting portion connects with an end portion of the secondary winding. The first connecting portion is covered with an electrically insulative resin.

Abstract: An ignition coil is so constructed that a transformer which includes a center core wound with a primary coil and a secondary coil, and a side core is fixed to a case by an insulating resin, and a core cover formed of material adherable to the insulating resin and a core cover formed of material releasable from the insulating resin are provided between the side core and the secondary coil.

Abstract: An ignition coil and a method for its manufacturer are provided, the ignition coil including a housing, a primary winding and a secondary winding disposed in the housing, and a terminal including a connection portion in electrical communication with the secondary winding and a threaded portion engaging the housing. The threaded portion of the terminal may include a self-tapping threaded portion. Furthermore, the terminal may include a first body portion having a first threaded portion and a first median diameter and a second body portion having a second threaded portion and a second median diameter, where the second median diameter is greater than the first median diameter. The terminal may also include a shoulder portion having a diameter greater than the second median diameter and a third body portion having a third median diameter greater than the second median diameter.

Abstract: A stick-shaped ignition coil includes a primary and secondary coils, a plurality of annular protrusions, a thin film sheet, a sub-assembly and a case. The annular protrusions are integrally formed on the outer circumferential periphery of the upper end portion of the primary coil arranged on the radially outer side. The thin film sheet covers the primary coil and the outer circumferential periphery of the plurality of annular protrusions. The sub-assembly is press-inserted to the outer circumferential periphery of the plurality of annular protrusions via the thin film sheet. The sub-assembly, which is electrically insulative, supports a lead portion of the primary winding. The case is press-inserted to the outer circumferential periphery of the cylindrical member.

Abstract: The winding (3) of an ignition coil device (1) is to be better sealed in order to afford it more protection from fouling, moisture, and reagents of all kinds. Provision is accordingly made such that there is introduced between a winding element (2) and an outer metal jacket (5) a rubber insulating element (7) having a sealing profile (8). As a result, improved sealing from the winding element (2) and the outer metal jacket (5) is provided. As an alternative, provision may be made such that the insulating element (7) including a sealing compound (10) is introduced between the outer metal jacket (5) and the winding element (2).

Abstract: An ignition coil has a connector electrically connected to an external circuit, an igniter for accommodating a switching element adapted to cause a current supplied from the connector to be intermittent, a primary coil portion for generating a predetermined voltage by the intermittent current, a secondary coil portion for stepping up the generated voltage and applying the resulting voltage to an ignition plug, and a resin insulating material which hardens in between the primary coil portion and the secondary coil portion to ensure insulation between the primary coil portion and the secondary coil portion. An outer shell of the igniter is formed of the resin insulating material.

Abstract: An internal combustion engine ignition device has a resin layer in a clearance between an insulator and a winding contained in the insulator. The ignition device has a cylindrical insulator and a resin layer. The insulator has an opening portion at one end and a bottom portion at the other end. The insulator contains one of a primary winding and a secondary winding. The resin layer is formed by charging a resin in the clearance between the insulator and one of the windings. The diameter of the inner periphery of the insulator gradually increases from the opening portion to the bottom portion. When the resin layer shrinks from the opening portion toward the bottom portion of the insulator, the resin layer can shrink without getting snagged on the inner periphery of the insulator.

Abstract: An ignition apparatus includes a core formed of magnetically-permeable material extending along a main axis, a primary winding disposed about the core, a secondary winding disposed on a secondary winding spool wherein at least one of the secondary winding leads is connected to a high-voltage connector terminal configured for connection to a spark plug, a case formed of electrical insulating material, and a magnetically-permeable shield disposed inwardly of the case and allowed to electrically float with respect to ground and a power source.

Abstract: A reactor unit comprises a basket body, a plurality of reactor bodies, a lid body, and a mold resin. The basket body has one open face and is made of a metal. The reactor bodies are accommodated in the basket body. The lid body is made of a metal and closes an open end of the basket body. Outlet holes are formed in the lid body. The mold resin is a curable resin. The basket body is filled with the mold resin, with a coil of each of the reactor bodies having been drawn out from a corresponding one of the outlet holes of the lid body. In this reactor unit, at least one partition, which is located between the reactor bodies and whose leading end extends from an inner face of at least one of the basket body and the lid body and abuts on an inner face of the other, is formed protrusively.

Abstract: An ignition coil device has a secondary spool, a secondary coil wound around the secondary spool, an insulating resin material that is filled into spaces between the secondary windings, a primary spool, a primary coil wound around the primary spool, a connector that is arranged on one end side in an axial direction of these parts and has a connector terminal electrically connected to the primary coil and the secondary coil, and a resin insulting material for connector that is filled into the connector. The base material of the coil insulating resin material is the same as or different from the base material of the connector insulating resin material.

Abstract: An ignition apparatus for an internal combustion engine can be reduced in size and cost. A plurality of closed magnetic circuit cores (2) are built in a casing (8) and each have an excitation portion (2a) and non-excitation portions (2b). A plurality of coil parts (100) each includes a primary coil (4) and a secondary coil (6) which are arranged to surround the excitation parts (2a) of a corresponding one of the closed magnetic cores (2). The closed magnetic circuit cores (2) are arranged along an axial direction (A) of the coil parts (100) such that adjacent ones of the non-excitation portions (2b), which are those sides of adjacent cores (2) each of which extends from one end of a corresponding excitation portion (2a), overlap each other at least partially in the axial direction (A).

Abstract: An electromagnetic coil assembly has a main coil having a first end and a second end, the main coil being wound without a bobbin, a first cover fitted over the main coil from the first end of the main coil, a second cover fitted over the main coil from the second end of the main coil and a molding resin covering the first and second covers.

Abstract: An ignition coil device is mounted in a plug hole member forming a plug hole with forming internal space with the plug hole member. The ignition coil device includes a primary spool, a primary coil wire that is wound around an outer surface of the primary spool. At least a given portion of the outer surface of the primary spool is formed of crystalline resin. Here, the given portion fluidly communicates with the internal space of the plug hole.

Abstract: An ignition coil comprises a housing, a rod-shaped center core 54 arranged substantially at the center within the housing, a thermal stress relaxing member 52 covering the outer circumferential surface of the center core 54, a cylindrical spool 4 arranged on the outer circumferential side of the thermal relaxing member 52 with a gap 9 in between and a resin insulating material 8a with which the gap 9 is filled and which hardens. The thermal stress relaxing member 52 is wound around the center core 54 and the thickness of the thermal stress relaxing member 52 is set to a thickness so that the thermal stress, which is caused by the thermal deformation of the center core 54 and is applied to the resin insulating material 8a, is reduced and reaches a saturation value thereof.