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| Number | Title | Issue Date |
| 7679483 | Core for reactor A core for a reactor includes: a plurality of core members, each of which has a convexly curved side face that serves as a bonding face; and a gap plate that is interposed between the curved side faces of the core members and that is bonded to the curved side faces.... | 03/16/2010 |
| 7456724 | Electrical steel sheet for low-noise transformer and low-noise transformer The present invention provides an electrical steel sheet core for a low-noise transformer capable of effectively lowering noise by suppressing vibration perpendicular to the surfaces of the steel sheets and reducing vibration, and relates to an electrical steel shee... | 11/25/2008 |
| 7394342 | Ignition coil and manufacturing method and apparatus thereof An axial end portion of a dielectric sheet, which is wound around a central core of an ignition coil, includes an axially projecting portion, which projects from an axial end surface of the central core positioned radially inward of primary and secondary coils in a ... | 07/01/2008 |
| 7362182 | Power amplifier A radio frequency power amplifier including control electronics for providing control signals for timing of the power amplifier. A first group of the drivers are coupled to the control electronics and a second group of drivers are coupled to the control electronics.... | 04/22/2008 |
| 7266882 | Method of manufacturing a miniaturized three- dimensional electric component Manufacturing of miniaturized three-dimensional electric components are presented, as well as components manufactured by the methods. The manufacturing methods comprise micro-replication of at least one master structure, e.g. via a mould structure, in at least one p... | 09/11/2007 |
| 7210218 | Method for fabricating electrical core sheet assemblies A method of fabricating electrical core sheet assemblies such as transformer limbs, transformer yokes, and transformer cores, includes the steps of first cutting electrical core sheets, whose main surfaces have been provided with an anti-corrosion layer, into a desi... | 05/01/2007 |
| 7190101 | Stator coil arrangement for an axial airgap electric device including low-loss materials A dynamoelectric, rotating electric machine includes a stator assembly that includes stacked stator coil windings. The machine is preferably a polyphase, axial airgap device. Improved slot filling results from the stacked stator coil configuration. Device performanc... | 03/13/2007 |
| 7164220 | Stator pole structure for an electrical machine An electrical machine, such as a transverse flux motor, incorporates a stator core assembly 1. The stator core assembly 1 comprises a stator frame 4 upon which stator cores 2,3 are located with spacer elements 7 therebetween. A num... | 01/16/2007 |
| 7109835 | Highly insulated inductive data couplers There is provided an inductive coupler for coupling a signal to a power line. The inductive coupler includes a magnetic core for placement about the power line, a coil wound around a portion of the magnetic core, and a semiconducting coating that encapsulates the co... | 09/19/2006 |
| 7105975 | Efficient axial airgap electric machine having a frontiron A rotating, dynamoelectric machine, such as an electric motor, a generator, or a regenerative motor, comprises a stator assembly that includes a backiron section, a plurality of stator tooth sections, and a frontiron. The dynamoelectric machine has an axial airgap-t... | 09/12/2006 |
| 7068135 | Stick-type ignition coil having improved structure against crack or dielectric discharge A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The... | 06/27/2006 |
| 7068138 | High Q factor integrated circuit inductor An inductor and a method of forming and the inductor, the method including: (a) providing a semiconductor substrate; (b) forming a dielectric layer on a top surface of the substrate; (c) forming a lower trench in the dielectric layer; (d) forming a resist layer on a... | 06/27/2006 |
| 6995484 | Coating compositions for electronic components and other metal surfaces, and methods for making and using the compositions A method is disclosed for providing inorganic and/or organic coating compositions onto rotor cores to eliminate soldering during aluminum injection. These coatings can also be applied upon electric motor rotors and/or stators laminates as well as other electronic co... | 02/07/2006 |
| 6977574 | Stick-type ignition coil having improved structure against crack or dielectric discharge A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The... | 12/20/2005 |
| 6967559 | Transformer for high-voltage X-ray generator A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second gener... | 11/22/2005 |
| 6933828 | Devices and methods for protecting windings around a sharp edged core 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 dia... | 08/23/2005 |
| 6919789 | Connecting structure of choke coil A connecting structure of choke coil, comprises a coil base composed of two halves forming an accommodating area within the two halves, and a coiling area beyond the two halves, and a corresponding symmetric connecting section extended from a solid section each on b... | 07/19/2005 |
| 6914513 | Materials system for low cost, non wire-wound, miniature, multilayer magnetic circuit components This invention describes materials system and processing conditions for manufacturing magnetic circuit components such as induction coils and transformers that are non wire-wound, miniature in size and, have a low manufacturing cost. The materials system of this inv... | 07/05/2005 |
| 6880228 | Method for manufacturing a three-phase transformer A three-phase transformer and a method of its manufacture are presented. The transformer comprises a magnetic circuit and three coil blocks. The magnetic circuit comprises two spaced-apart, parallel, plate-like elements; and three spaced-apart, parallel column-like ... | 04/19/2005 |
| 6834644 | Circular ignition coil assembly 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 wi... | 12/28/2004 |
| 6694958 | Ignition device for internal combustion engine In an ignition device for an internal combustion engine, comprising a spark plug made to carry out an electric discharge between an center electrode and an earth electrode and an ignition coil having a primary winding and a secondary winding for supplying... | 02/24/2004 |
| 6617950 | Common mode/differential mode choke A common mode and differential mode inductance assembly including first and second torridial cores wherein first and second windings are wrapped about first and second segments of the first core and the first core forms a first surface and wherein the sec... | 09/09/2003 |
| 6600402 | Bobbins, transformers, magnetic components, and methods A bobbin is adapted to support a winding on a permeable core and has a wall that provides a confined thermally conductive channel that causes conduction of heat along a predetermined path from the core to a location outside the winding. A value of magneti... | 07/29/2003 |
| 6593836 | Bobbins, transformers, magnetic components, and methods A bobbin is adapted to support a winding on a permeable core and has a wall that provides a confined thermally conductive channel that causes conduction of heat along a predetermined path from the core to a location outside the winding. A value of magneti... | 07/15/2003 |
| 6411188 | Amorphous metal transformer having a generally rectangular coil A dry-type power distribution transformer has a generally rectangular, wound amorphous metal core and a resin encapsulated, generally rectangular coil. The core has a generally rectangular core window within which is located a substantially straight secti... | 06/25/2002 |
| 6259347 | Electrical power cooling technique The apparatus for cooling a high power electrical transformer and electrical motors uses thermally conductive material interleaved between the turn layers of a high power transformer and iron core laminates to provide a low resistant thermal path to ambie... | 07/10/2001 |
| 5955201 | Inorganic/organic insulating coating for nonoriented electrical steel The present invention relates to a nonoriented electrical steel sheet coated on both surfaces with a cured insulative coating for providing a high level of surface resistivity to minimize interlaminar power losses. The cured insulative coating on the stee... | 09/21/1999 |
| 5880662 | High self resonant frequency multilayer inductor and method for making same A high self resonant frequency inductor and method for making the same is described. The inductor comprises a plurality of horizontal conductor coils vertically spaced apart, including a top conductor coil and a bottom conductor coil, the top and bottom c... | 03/09/1999 |
| 5861791 | Ignition coil with non-filtering/non-segregating secondary winding separators 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 preferre... | 01/19/1999 |
| 5844461 | Isolation transformers and isolation transformer assemblies An isolation transformer comprises two core pieces mounted to cooperate to provide flux paths, one of the core pieces being shaped so that a central flux path is defined by a central leg of the core, at least two magnetically coupled windings surrounding ... | 12/01/1998 |
| 5793272 | Integrated circuit toroidal inductor High quality factor (Q) spiral and toroidal inductor and transformer are disclosed that are compatible with silicon very large scale integration (VLSI) processing, consume a small IC area, and operate at high frequencies. The spiral inductor has a spiral ... | 08/11/1998 |
| 5717373 | Corner insulation for toroidal (annular) devices An article of insulation, especially adapted for insulating corners, is provided. The article is constructed in the form of an elongated flexible sheet capable of sustaining and retaining at least one longitudinal fold therein and having generally a begin... | 02/10/1998 |
| 5677661 | Rotary transformer A method for the manufacture of a rotary transformer in accordance with the present invention comprises the steps of forming two cylindrical stator ferrite blocks with the same inner diameter but different outer diameters and two cylindrical rotor ferrite... | 10/14/1997 |
| 5658668 | Electromagnetic steel sheet and a core made therefrom An electromagnetic steel sheet having a corrosion-resistant electrically insulating film. The insulating film is formed by spraying and baking, on the steel sheet, a treating liquid containing an emulsion of fine resin particles, a reducing agent and an a... | 08/19/1997 |
| 5658660 | Magnetic core coated with tin free electrodeposition coatings In order to prevent clouding of a hard disc and a polygon mirror, a tin-free electrodepositing coating composition is used as an insulating coated film of a motor for driving the hard disc and polygon mirror.... | 08/19/1997 |
| 5639566 | Magnetic core A magnetic core obtained by laminating or winding a magnetic material ribbon and an electrical insulating material wherein the magnetic core has the relationship of 0.5 aࣘb | 06/17/1997 |
| 5546065 | High frequency circuit having a transformer with controlled interwinding coupling and controlled leakage inductances A transformer in which a magnetic medium provides flux paths within the medium, two or more windings enclose the flux paths at separated locations along the paths, and an electrically conductive medium, arranged in the vicinity of the magnetic medium and ... | 08/13/1996 |
| 5528205 | Integrated electromagnetic interference filter An integrated and drop-in EMI filter that features common-mode and differential-mode noise filtering capabilities is disclosed. The common-mode portion and the differential-mode portion of the filter are independent of each other in that the two filter po... | 06/18/1996 |
| 5359314 | Core and coil assembly for an amorphous-steel cored electric transformer This transformer core and coil assembly comprises (a) a low voltage coil surrounding a coil window and including first and second coil legs on opposite sides of the coil window, (b) a first plurality of side-by-side amorphous-steel core loops surrounding ... | 10/25/1994 |
| 5331304 | Amorphous metal transformer core An apparatus and method for structurally restraining and reinforcing an amorphous metal core of an electrical transformer employs an adhesive bonding agent applied to the lamination edges and protective layers of the core followed by adhesion of a woven f... | 07/19/1994 |
