Abstract: An electronic component comprises: a magnetic core having a flat base and a core, the flat base having a top, a bottom, and first and second opposite sides, the core is on the top; a winding having an edgewise coil including a wound flat wire and the core, the winding having two non-wound flat wires extending therefrom; and a magnetic exterior body covering the core and the edgewise coil. The two non-wound flat wires extend along the top, the first side, the bottom and then the second side, and the two non-wound flat wires are non-adhesively positioned around the flat base. The two non-wound flat wires on the bottom are externally exposed electrodes. The second side inclines towards the core. The two ends of the two non-wound flat wires are embedded into the magnetic exterior body to fix the two non-wound flat wires to the magnetic exterior body.

Abstract: A turbomachine having a rotor assembly, a stator assembly and a toroidal inductor. The rotor assembly includes an impeller. The inductor is located between the impeller and the stator assembly, and is exposed to an airflow generated by or acting upon the impeller.

Abstract: A method is for impregnating a high voltage insulation of a winding bar (10), the winding bar (10) having a conductive bar (1) around which layers of insulating mica tape defining said high voltage insulation are wrapped. The method includes enclosing the winding bar (10) in a flexible sleeve (3), applying a vacuum in the flexible sleeve (3) to extract the gases contained in the insulating mica tape, supplying an impregnating resin into the flexible sleeve (3) to impregnate the mica tape (2), and curing the resin. The impregnating resin is supplied into the flexible sleeve (3) at a pressure less than 1.5 bar.

Abstract: A coil includes a wound body and a resin covering. The wound body is configured by winding a conductor. The wound body is pressure-moulded. The resin covering covers a surface of the wound body.

Abstract: A reactor includes: a molded coil including two coils integrally molded with resin; and two U-shaped cores each having core insertion portions inserted in the coils in a coil axial direction, and the cores being joined in a track-like form by interposing gap elements between them to form a core assembly. The molded coil has a substantially hexahedral shape, each of the cores includes a core outer portion joining the core insertion portions, a resin layer made of magnetic-metal containing resin consisting of binder resin and magnetic metal powder mixed therein is formed on outer surfaces of the core outer portions, the molded coil includes a fastening retaining part for holding and fixing the reactor to a cabinet with a fastening member so that the cabinet supports the reactor, and the molded coil is held apart from the cabinet by the fastening member and the fastening-member retaining part.

Abstract: A wireless energy transfer system includes a first energy transfer unit having at least one resonant frequency, a second energy transfer unit having the at least one resonant frequency, and a load. The first wireless energy transfer unit includes a first coil magnetically coupled to a first wireless energy transfer cell, and the second wireless energy transfer unit includes a second coil magnetically coupled to a second wireless energy transfer cell. The first coil receives first energy and through the magnetic coupling between the first coil and the first wireless energy transfer cell, the first wireless energy transfer cell is caused to generate second energy, wherein the second wireless energy transfer cell receives the second energy and through the magnetic coupling between the second wireless energy transfer cell and the second coil, the second coil is caused to provide third electromagnetic wave energy to the load.

Abstract: An oxide superconductor wire includes: a superconductor laminate that comprises a substrate which is formed in a tape shape and an intermediate layer, an oxide superconductor layer, and a metal stabilizing layer which are laminated on the substrate; and an insulating coating layer that covers an outside surface of the superconductor laminate, Also, either the entire outside surface or the entire inside surface of the insulating coating layer is coated with a coating layer formed of a fluororesin.

Abstract: Generally, methods and processes for assembling magnetic components are presented herein. More specifically, conductors are wound around a substantially hollow bobbin. Portions of the conductors may be temporarily positioned outside the bobbin through slots in the flanges of the bobbin during the assembly process. Insulating layers may be wrapped around the conductors. The center legs of a pair of magnetic core halves may be inserted into the bobbin. The base of the magnetic core halves may have a passage to allow a conductor to pass therethrough at a height less than the height of the base.

Abstract: A dry-type transformer includes at least one high-voltage winding and one low-voltage winding. The windings are operatively connected to one another by an electromagnetic field, and each winding is constructed from winding conductors, wherein the high-voltage winding and the low-voltage winding have a defined distance from one another, and spacers are arranged between the windings and maintain the defined distance.

Abstract: An aliphatic polyamide film or fibrous material is employed for electrical insulation in individual conductors, groups of conductors, magnet wire, magnet wire coils, and layers in liquid filled electrical transformers. The material is stabilized with additives that produce improved moisture resistance, moisture stability, thermal stability, thermal conductivity, reduced insulation thickness, reduced shrinkage, and improved insulation elasticity for the insulation material thereby providing a longer useful life for the material.

Abstract: [PROBLEM] By simplifying a core securing structure of a reactor, miniaturization, lightweight, and low costs of the reactor are achieved. [SOLVING MEANS] The core securing member to secure a core 109 in a case 101 in the reactor wherein the core 109 and the coil 105 are housed in the case 101 is made up of a first spring portion S1 which gives momentum to a side face of the core 109 in a horizontal direction and a second spring portion S2 which gives momentum to an upper face of the core 109 in a vertical direction. Moreover, a stopper portion to restrict popping of the core from the case and the second spring portion are integrally formed with a notch being interposed between the stopper and the second spring portion so that the stopper portion covers part of an upper face of the core.

Abstract: This invention relates to a method of manufacturing electrical windings for electrical apparatus and transformers.

Abstract: An inductor has a case having an opening, a core accommodated in the case, a coil wound on a part of the core and a fixing member fixed to the case. The fixing member fixes the core by contacting a top surface of the core facing the opening and elastically biasing the core toward a bottom surface of the case. The fixing member further includes a first plate portion and a first contacting portion. The first plate portion is disposed between the top surface of the core and the opening of the case and extending in parallel with the top surface of the core. The first contacting portion extends from a fore-end portion of the first plate portion so as to be U-shaped and having a distal end portion elastically push-contacting the top surface of the core.

Abstract: In a main conductor for a capacitively controlled high-voltage winding composed of pancake coils for transformers, in which the main conductor for the load current is realized as a twisted conductor, and in which a control conductor is provided which is spatially arranged inside the twisted conductor and is electrically separated from the twisted conductor, the main conductor consists of two twisted conductors (1, 2) that are electrically separated from each other. The control conductor consists of several flat copper conductors (7) covered by an insulating sheath (7a), and the copper conductors (7) are fastened to one of the twisted conductors (1, 2).

Abstract: An electric ballast 1 is provided with an electric coil with windings having a width d which are wound on a synthetic resin coil base 10 comprising a box-like base part 11 of rectangular shape having four faces 111, 112, 113, 114. The base part is suited to accommodate an iron core of the coil. The base part is provided on either side with mutually parallel flanges 121, 122 which define the width d. The ballast is provided with a separate, insulating synthetic resin cover which is in one piece and which, when positioned in engagement with the coil base, cooperates therewith to substantially completely enclose the coil windings.

Abstract: Electromagnetic devices are provided including an electrically conductive core having an inner diameter defining an opening therethrough and an outer diameter, the core having sharp edges extending circumferentially around the inner diameter and around the outer diameter thereof. A plurality of polymeric protection members are wrapped circumferentially around the core and positioned adjacent the sharp edges of the core. The protection members have a short leg positioned adjacent an end of the core. A coated wire is wrapped around the core so as to be magnetically coupled thereto and around the polymeric protection members so as to be displaced from the sharp edges of the core. Polymeric protection members and methods for manufacturing such members and for fabricating devices using such members are also provided.

Abstract: A high-voltage winding is described for use in a dynamoelectric machine. The high-voltage winding includes an electrical conductor (12), an insulator (14) surrounding the electrical conductor, and an electrically conductive layer (16) surrounding the insulator. The insulator (14) may include a tape (18) arranged to define a wrapped layer. A double-sided tape may be provided that includes a flexible tape substrate (20) with an inner major surface (22) adjacent the conductor (12) and an outer major surface (24) opposite the inner major surface. An inner silicate layer (26) may be secured to the inner major surface and an outer silicate layer (28) to the outer major surface. A single-sided tape may also be provided between the conductors and double-sided tape.

Abstract: The inventive coil comprises a coil body (1) on which an exciter winding (7) is arranged. A peripheral insulation winding (8) consisting of an insulating fiber is formed over the exciter winding, the individual windings of the insulating winding being bonded to each other in order to form a continuous insulation layer. The insulation winding can be made up of a mineral fiber impregnated with duromer resin or a thermoplastic fiber which has been melted on by subsequent heat treatment.

Abstract: A structure of a surface-mount coil is provided which prevents a decrease in the fixing strength between the core and the lead frame of the surface-mount coil when soldering of a surface-mount coil to a mount board. Specifically, the structure of the surface mount coil of the present invention suppresses movement and diffusion of molten solder to lower faces of the core placing portions when soldering the external connection terminals to electrode lands of the mount board. The molten solder is detained on the electrode lands to form sufficient solder fillet on the external connection terminals, resulting in suppression of generation of defects in soldering and prevention of decreases in the fixing strength between the core and the lead frame by preventing heat transfer to the upper surface of the core mount portion of the surface mount coil.

Abstract: An induction heating type fixing device for an electrophotographic printer, facsimile apparatus, copier or similar image forming apparatus and an induced current generating member therefore are disclosed. A coil is wound round a bobbin applied with an adhesion preventing material. After the coil has been adhered by nonconductive adhesive by impregnation, the coil and bobbin subassembly is inserted into a hollow cylinder body formed of a heat-resistant insulating material. After the coil has been adhered to the cylindrical body, the bobbin is pulled out to produce the induced current generating member.

Abstract: A catalyzed mica tape used in insulating electrical conducting devices is made from a mica paper bonded to a backing with a bonding resin. The bonding resin is cross-linkable by an addition reaction. The catalyzed mica tape has distributed therein at least a catalyst at a concentration of greater than 0.01 g/m.sup.2 for every 100 g/m.sup.2 of the bonding resin. The catalyst is an organo-transition metal compound, organo-tin compound, or a combination thereof.

Abstract: An improved transformer coil of the type characterized as a shell-form or pancake coil used in large scale power transmission transformers. The improvement adds strength to resist lateral edge coil deformation as a result of handling the coil during transformer assembly and as a result of fault current surges. The improvement is directed to tightly spread taping some of the inner and outermost conductor turns together with preferably a heat shrinkable structural tape. This spread taping is periodic or spaced along the outer periphery of the coil for economy and may be staggered in terms of the number of conductor turns wrapped together. Preferably, the innermost conductor turns may also be spread taped in this same manner.

Abstract: A degaussing coil designed to be mounted on the glass panels of cathode-ray tubes used to display color images wherein, the link between the ends of the winding of the degaussing coil and the conductors provides connection to the electrical supply circuit is encased in an insulating thermoplastic material. The degaussing coils is utilized for color television receivers.

Abstract: An ignition coil for an internal combustion engine and a method of making the same in which layers of the secondary winding are separated by a non-filtering/non-segregating material embedded in an electrically insulated ignition coil housing. The preferred non-filtering secondary winding separator is a solid filament, non-absorbing/non-adsorbing mesh, such as a nylon mesh. Using the non-filtering/non-segregating secondary winding separator prevents filler damming when an ignition coil housing is manufactured using a vacuum encapsulation and curing process in which an encapsulation compound (e.g. a thermal setting epoxy) has solid additives (e.g. sand fillers). Non-absorbing/non-adsorbing separators are also advantageous because the separators do not alter the chemistry of the encapsulation compound.

Abstract: Toroidal transformers and other toroidal magnetic components need insulation between separate windings. International safety standards specify minimum requirements for both total insulation thickness and number of layers of insulation. The safety requirements can be met by a toroidal transformer insulation method and toroidal transformer having, in combination, a wide sheet of insulation material covering the outside perimeter and the top and bottom radial surfaces of a winding but not entering into the center hole, and wrapping with a narrow strip of insulation material for covering the entire winding and the wide sheet of insulation material. Because the wide sheet adds insulation on the outside perimeter of the winding, which is larger then the inside perimeter of the center hole, the outer wrapping with the narrow strip need only provide the insulation actually required on the inside perimeter of the center hole.

Abstract: A degaussing coils designed to be mounted on the glass panels of cathode-ray tubes used to display color images wherein the link between the ends of the winding of the degaussing coil and the conductors provides connection to the electrical supply circuit is encased in an insulating thermoplastic material. The degaussing coils is utilized for color television receivers.

Abstract: A distribution transformer (58) is assembled using a core (18) having a core surface (36) including an inner circumferential surface (40) defining an open eye region (38), an outer circumferential surface (42), and end surfaces (24, 26). Wedged-shaped core supports (20, 22), secured to the end surfaces of the core, are used to support the core during conductor winding operations and to mount the finished transformer within a transformer container (66). The core supports do not extend into the open eye region and allow virtually the entire inner circumferential surface to be covered by the electrical conductors (34, 56). The layers of electrical conductors are wound on top of one another so that each successive layer of electrical conductors conforms to the core surface and any previously wound conductors. Electrical insulation (54) is provided between each conductor layer.

Abstract: A safety insulated transformer where there are at least three layers of safety approved insulating material between any parts of the wires forming first and second windings. The first winding is wrapped torroidally with a strip of safety approved insulating material, the successive layers of that wrapping overlapping to form at least two of the required layers of safety approved insulating material, and either overlapping to form all three required layers or at least one of the wires having a coating of safety approved insulation. Preferably the ends of the wire of the first winding have end insulation comprising coiled overlapped layers of safety insulation, and a layer of additional safety insulation material of at least two superimposed thicknesses makes a minimum of one and one half turns transversely of the coil of the first winding around the coil in the region or regions where the ends leave the coil.

Abstract: A method of making an amorphous metal transformer core includes the steps of providing an amorphous metal core having two legs which are connected by an upper and a lower yoke, wrapping each of the legs with a sheet of flexible material which is capable of withstanding, without degradation, the temperature which is required to anneal the amorphous metal core, and then annealing the amorphous metal core. An amorphous metal transformer core includes a stack of amorphous metal laminations, the stack being formed into two legs which are connected by upper and lower yokes in which the legs are wrapped with a sheet of flexible material which is capable of withstanding, without degradation, the temperature required to anneal the amorphous metal core.

Abstract: An improved coil end face insulator and the application technique therefor serve to accurately and cost-effectively insulate the end windings of an electrical coil from the transverse arm of a ferromagnetic core spaced closely thereto. The insulator is of annular, one-piece construction, and comprises adhesively-backed tape. The insulators are dispensed in a convenient manner for rapid and accurate application to the respective end faces of coils respectively positioned on a mandrel or fixture.

Abstract: A dry, highly flexible, porous, essentially solvent free mica insulation tape is made, containing a curable, resinous, bonding composition containing polybutadiene containing from 70 weight percent to 100 weight percent of 1,2-polybutadiene, and catalyst, where the tape contains from 2 weight percent to 15 weight percent of polybutadiene based on the total weight of the resin bonded tape, and where the tape is capable of subsequent impregnation by an impregnating resin.

Abstract: Multiple turn coils are arranged with turn insulation around individual turns, group insulation around each of a plurality of groups of turns, and ground insulation around the entire coil half. This arrangement protects against a potential discharge between turns upon occurrence of a steep front impulse voltage.

Abstract: A transformer with E-shaped and I-shaped magnetic cores which are respectively formed of a stack of E-shaped sheet laminations and a stack of I-shaped sheet laminations, includes sheet insulators to insulate coils from the magnetic core. Spacer members are formed from parts of the sheet insulator to hold the preferable distance between the coil and a central leg of the E-shaped magnetic core. The spacer members are each formed by folding parts of the sheet insulator.

Abstract: A transformer coil body providing an elongated creepage path between primary and secondary windings has at least one U-shaped channel member with a portion thereof projecting between the primary and secondary windings providing a surpentine creepage path, the minimum distance of which is at least as great as established creepage distance standards, the coil body being formed of a single piece.

Abstract: An improved magnetic core for an electrical transformer, and a method and apparatus for forming the core, are disclosed wherein the corners of core windows are configured to decrease the magnetic path length, thereby reducing the core losses and the amount of material necessary to construct the core. One exemplary embodiment includes a core window opening having an outer corner radii that are larger than the inner corner radii. Alternatively, the core window may have corners of a non-constant radii, with the outer corners having a more gradual or gentle curvature. These and other disclosed embodiments also enhance the ease of assembly of the transformer core and thus decrease or eliminate damage to the magnetic material during assembly.

Abstract: A field coil insulation shield for a motor or generator is made of a single sheet of insulating material, and defines portions which substitute for the paper insulator conventionally disposed around a field pole and between a field coil and a motor frame, and portions which substitute for individual wrappings with tape to form the field coil and to protect it from the structure of the field pole which holds it in position. The portions which substitute for a wrapping of tape are provided with elongated projections which are latchingly received around the edge of a central aperture, through which the field pole passes.

Abstract: A method of insulating an electromagnetic coil comprises the steps of wrapping first and second overlapping layers of fluorinated ethylene propylene (FEP) resin-coated polyimide tape around distal sections of the end turns of the coil, inserting conforming laminae of FEP resin-impregnated glass cloth between adjacent coil turns, wrapping at least two overlapping layers of FEP resin-coated polyimide tape around the entire coil, heating the coil to at least the resin melting point, applying pressure to compress the tape and laminae and to clamp together the respective turns of the coil, and finally cooling the coil under pressure to allow the resin to resolidify. The resulting product has a thin, uniform coating of impervious electrical insulation characterized by improved heat transfer capability and improved stability at high temperatures.

Abstract: An electromagnet coil comprises a plurality of turns, including a pair of end turns having distal sections wrapped in first and second overlapping layers of fluorinated ethylene propylene (FEP) resin-coated polyimide tape. Conforming laminae of FEP resin-impregnated glass cloth are inserted between and bonded to adjacent turns of the coil. The entire coil is wrapped in at least two overlapping layers of the aforesaid tape, with the inner layer being bonded to the surface of the coil turns that it covers and the respectively adjoining layers of tape being bonded to each other. The resulting product has a thin, uniform coating of impervious electrical insulation characterized by improved heat transfer capability and improved stability at high temperatures.

Abstract: Attachment of external electric supply lead wires to an electromagnetic coil assembly is done by a method using a harness base strip of resilient plastic insulating material having the two leads attached to the strip and the strip formed with a point and latching aperture portion for snapping onto the coil. The leads are twisted to the coil wire ends, soldered and laid flat against the outer face of the strip. A tailend portion of the strip is then wrapped over the soldered joints with subsequent taping, if desired.

Abstract: An electrical coil assembly comprises a rectangular annular coil and a dustproof cover therefor. The cover is formed of a folded blank of electrically insulating sheet material which has a rectangular annular portion with a rectangular aperture. A first pair of opposed flaps and a second pair of opposed flaps are integrally joined to the external periphery of the portion. Each flap has a first tongue portion which is passed through the aperture and a second tongue portion which overlies a respective side of the aperture in the coil. The width of each tongue portion is greater than the length of the respective side of the aperture in the coil. The width of each tongue portion is not greater than the length of the respective side of the apertures. This blank is easy to assemble into a cover and there is a reduced risk of tearing the flaps.

Abstract: An electrical coil assembly comprises a rectangular, flat annular coil and a flexible annular covering of, for example, fibre board sheet surronding the coil so as to provide a substantially dustproof seal. The covering is formed by folding and glueing a blank around the coil. The blank comprises a rectangular annular portion a first pair of flaps extending one from each of two opposite outer peripheral sides of the annular portion, a second pair of flaps extending one from each of two opposite sides of the inner periphery of the annular portion and further flaps extending from the outer periphery of the annular portion. The annular portion is provided with fold lines and is of a size, when folded, to overlie opposite faces of the coil and the flaps fold around the inner and outer peripheries of the coil to provide a substantially dustproof seal.

Abstract: A synthetic resin packed coil assembly formed by a wound spiral of a number of bundled turns of insulated wire comprises at least one layer enveloping the bundled turns of insulated wire of the wound spiral. This layer is composed of a synthetic resin reinforced by a high strength fibrous material and is formed by first winding the high strength fibrous material around the bundled turns of insulated wire of the wound spiral, subsequently impregnating a solution of the synthetic resin and finally allowing the synthetic resin to harden.

Abstract: A coil assembly for bobbin wound transformer includes a spacer between the end turns of a primary and secondary windings, which spacer is molded from synthetic resin material. The molded spacer includes an inner body portion which covers the surface of the primary winding, and a marginal portion which extends outwardly along the inner sidewall of the flange of the bobbin. The marginal portion sufficiently separates that portion of the outer secondary winding which is disposed along the flange of the bobbin.

Abstract: A bobbin wound electrical coil assembly wherein external leads connected to the coil ends are secured in the flanges of the bobbin. Connector terminals connecting external lead ends and coil ends are fixed in sockets formed in one bobbin flange to preclude pulling stress on the coil end connections, and slots in the periphery of the other bobbin flange receive portions of the external leads spaced from their connected ends. A snap-on insulating cover having tabs which engage holes in the flanges of the bobbin extends between the bobbin flanges and over the external leads to cover the connections and to retain the external lead portions in the slots in the bobbin flange.