Coil Forms Protective Casing Patents (Class 336/82)
  • Patent number: 9171665
    Abstract: An integrated inductor assembly is provided. The integrated inductor assembly includes a magnetic core, a first inductor, and a second inductor. The magnetic core has a first side, an opposing second side, and an opening defined within the magnetic core. The opening extends into the magnetic core from at least one of the first side and the second side. The first inductor includes a first conductive winding inductively coupled to the magnetic core. The first conductive winding includes a first shorting segment positioned within the opening. The second inductor includes a second conductive winding inductively coupled to the magnetic core. The second conductive winding includes a second shorting segment positioned within the opening. The first and second inductors are configurable to operate independently of one another.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: October 27, 2015
    Assignee: General Electric Company
    Inventors: Arturo Silva, John Steel
  • Patent number: 8928445
    Abstract: Provided is an electromagnetic pipe expanding inductor in which the formation of voids during resin impregnation is suppressed, and electromagnetic reaction forces acting on the conductor periphery and on the interface between the shaft portion and the center-side fiber layer is diminished, and thereby durability is improved and the life of the inductor is prolonged. A glass cloth tape (3) capable of being impregnated with resin is wound around the peripheral surface of a shaft portion of a bobbin (2) to a predetermined thickness, further, a conductor strand (4) coated with a glass cloth tape (6) is wound spirally in the axial direction of the bobbin (2) to form a coil. Further, a glass cloth (7) is wound around the outside of the glass cloth tape (6) to a predetermined thickness and thereafter the glass cloth tapes (3, 6) and the glass cloth (7) are impregnated with resin to unite them.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 6, 2015
    Assignee: Kobe Steel, Ltd.
    Inventors: Mitsutoshi Mori, Hiroaki Hosoi, Hidetaka Kanahashi, Yoshihaya Imamura
  • Patent number: 8902033
    Abstract: An inductor comprises a ferromagnetic core, a litz wire conductor encircling the ferromagnetic core, a housing, a bobbin, a conductive pin, and a seal assembly. The housing encloses the ferromagnetic core and the litz wire conductor. The conductive pin is conductively attached to the litz wire conductor, and extends therefrom to form an external electrical contact. The bobbin supports the litz wire conductor and positions the conductive pin in alignment with an aperture in the housing which is sealed against fluid egress by the seal assembly.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 2, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Charles Shepard, Kris H. Campbell, Adam M. Finney, Robert Scott Downing
  • Patent number: 8860540
    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.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: October 14, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kei Takano, Shin Yamada, Osamu Hosokawa, Takeshi Chigiri, Kiyokatsu Akimoto
  • Patent number: 8836459
    Abstract: A power module includes a metal housing formed of a metal case and a metal cover plate, a transformer module accommodated in the metal housing, including a base member having an iron core holder block suspending in a center opening thereof and two connection blocks disposed at two opposite sides thereof, metal conducting terminals arranged in two sets and respectively mounted in the connection blocks of the base member, a winding wound round the iron core holder block, two iron cores respectively attached to opposing top and bottom sides of the iron core holder block and two circuit boards respectively inserted into the two connection blocks of the base member and electrically coupled with two opposing connection terminals of the winding and respective vertical contact ends of the metal conducting terminals, and a thermo-conductive insulating glue filled in the metal housing to package the transformer module.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: September 16, 2014
    Assignee: Chicony Power Technology Co., Ltd.
    Inventors: Ming-Yen Hsu, Chao-Jui Huang, Yu-Jen Lai
  • Patent number: 8816809
    Abstract: A reactor is disclosed. The reactor is comprised of a housing, a solenoid coil, a center columnar member, and a core. The center columnar member provides first surfaces contacting with sandwich portions of the housing, and the core is comprised of resin including magnetic powder. The coil and the center columnar member are fixed in the core. A surface roughness (Rz2) of a second surface which contacts to the core is larger than a surface roughness (Rz1) of the first surfaces. The center columnar member further provides a basis surface of which roughness (Rz3) is smaller than the Rz2 and larger than the Rz1.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: August 26, 2014
    Assignees: Denso Corporation, Nec Tokin Corporation
    Inventors: Kazuhiro Kosaka, Ryota Tanabe, Souichi Yoshinaga, Masahiko Yamashita, Seigo Satou, Mitsutoshi Kameda, Tsugio Takeda
  • Patent number: 8803647
    Abstract: A reactor is provided with a coil, a core, and a case. The coil generates magnetic flux in response to supply of current thereto. The core is made of magnetic powder-containing resin filled in spaces inside and outside of the core. The case accommodates therein the coil and the core. The reactor is also provided with a cooling pipe (cooling member), which is arranged to be in contact with the core. A power converter is provided with semiconductor modules, a cooler, and the reactor. In the power converter, the cooler is arranged partially being in contact with the core of the reactor.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: August 12, 2014
    Assignees: Denso Corporation, NEC Tokin Corporation
    Inventors: Kenji Saka, Kazuhiro Kosaka, Akira Nakasaka
  • Patent number: 8742663
    Abstract: In various embodiments, a lamp base element for holding a transformer is provided. The lamp base element may include a transformer chamber which holds the transformer, wherein the transformer is held completely in the transformer chamber, and wherein the contact pins of the transformer are passed through a contact-making face of the transformer chamber, which contact-making face is opposite an opening face.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: June 3, 2014
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventor: Frank Sroka
  • Patent number: 8701272
    Abstract: A method of forming a power module located on a conductive substrate by providing power conversion circuitry. The method of providing the power conversion circuitry includes forming a magnetic device by placing a magnetic core proximate a conductive substrate with a surface thereof facing a conductive substrate, and placing a conductive clip proximate a surface of the magnetic core. The method of forming the magnetic device also includes electrically coupling ends of the conductive clip to the conductive substrate to cooperatively form a winding therewith about the magnetic core. The method of providing the power conversion circuitry also includes providing at least one switch on the conductive substrate. The method of forming the power module also includes depositing an encapsulant about the power conversion circuitry.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: April 22, 2014
    Assignee: Enpirion, Inc.
    Inventors: Ashraf W. Lotfi, Mathew A. Wilkowski, Trifon M. Liakopoulos, John D. Weld
  • Patent number: 8416044
    Abstract: A reactor is composed of a coil and a core placed in the inside area and outer peripheral area of the coil in a container. The core is composed of magnetic powder, non-magnetic powder, and resin. The non-magnetic powder is composed of main component powder and low elastic modulus powder. The main component powder as a main component of the non-magnetic powder is made of one or more kinds of powder of a heat conductivity which is larger than that of the resin. The low elastic modulus powder is made of one or more kinds of powder of an elastic modulus which is smaller than that of the powder forming the main component powder.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: April 9, 2013
    Assignees: Denso Corporation, NEC Tokin Corporation
    Inventors: Kenji Saka, Takashi Yanbe
  • Patent number: 8378775
    Abstract: Transformers (1) for transforming primary signals into secondary signals comprise primary and secondary parts that comprise boards (11-14, 21-23) with turns. By introducing distances larger than zero between for example any pair of neighboring boards (11-14, 21-23), parasitic capacitances of the transformers (1) are reduced, and the secondary signals may comprise relatively fast/high voltage pulses having rise times >1 kV/?sec. To reduce proximity effects and any resulting losses, the primary and secondary boards (11-14, 21-23) may be stacked in interleaved ways. Such sandwich constructions reduce leakage inductances. In a particular direction, distances between subsequent primary boards (11-14, 21-23) and distances between subsequent combinations of primary and secondary boards (11-14, 21-23) are to be increased to further reduce capacitive losses in that particular direction.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: February 19, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Wolfgang Schiene, Georg Greuel, Marc Maria Alex Bleukx, Roman Siegfried Schichl
  • Patent number: 8350653
    Abstract: The present invention relates to a connector system that provides the transfer of electrical power and/or data communications signals between two systems. The connector has no conductive electrical connection and can operate independently of angular orientation.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: January 8, 2013
    Assignee: WFS Technologies Ltd.
    Inventors: Mark Rhodes, Brendan Hyland, Alexander Ballantyne
  • Patent number: 8344839
    Abstract: A transformer includes: —a plurality of windings (P, S1, S2) wound on a coil former (100), preferably in the form of a one-piece coil former, —a pair of first insulating flanges (106) separating a first winding (P) from a pair of second windings (S1, S2), —a pair of second insulating flanges (104) defining together with the first insulating flanges (106) two winding spaces for the second windings (S1, S2). The ends (P1, P2) of the wire of the first winding (P) extend across the winding spaces for the second windings (S1, S2). Insulating walls (208) are provided extending between the ends (P1, P2) of the wire of the first winding (P) and the second windings (S1, S2) to provide insulation therebetween.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: January 1, 2013
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventor: Marco Faccin
  • Patent number: 8320136
    Abstract: An embodiment of an electronic component includes a circuit element disposed within a package, which includes a surface and at least one standoff protruding from the surface. For example, where the circuit element is an inductor in a power supply, the standoff may allow one to mount the inductor component over another component, such as a transistor component. Therefore, the layout area of such a power supply may be smaller than the layout area of a power supply in which the inductor and transistor components are mounted side by side.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: November 27, 2012
    Assignee: Intersil Americas Inc.
    Inventor: Kun Xing
  • Patent number: 8299879
    Abstract: A transformer assembly (300) for use with an internal load (307) includes a transformer core (323) having a primary winding (405). A first electrode (303) and second electrode (319) are used for contacting an internal load (307). A secondary circuit is formed that includes the first electrode (303), the second electrode (319) and conductors (301,313, 317) positioned between the first electrode (303) and second electrode (319). The transformer assembly (300) is arranged so that the conductors (301, 313, 317) surround the primary winding (405), transformer core (323), the first electrode (301) and second electrode (319). The transformer assembly (300) may be used in an electrode furnace or other high current and voltage applications requiring high efficiency in a small package.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: October 30, 2012
    Assignee: LECO Corporation
    Inventors: Ted Casper, Gordon Ford, Brad Rush
  • Publication number: 20120256718
    Abstract: Unique methods are described to construct an inductor in the form of a tray. The basic inductor consists of a ferromagnetic core with a cavity and a completely or partially embedded winding structure. Components of a power conversion system or sub-system are mounted inside this tray structure. The terminals of the winding structure serve as mounting surfaces for components of a power conversion or other type of electronic system or sub-system. The single winding inductor is also extended to multi-winding inductors. The winding terminations are shaped to form Kelvin connections for current sensing. Flanges are added to the winding structure forming an integrated heat sink.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 11, 2012
    Inventor: Muzahid Bin Huda
  • Patent number: 8054152
    Abstract: A transformer includes a covering member, a bobbin, a primary winding coil, plural secondary winding coils, and a magnetic core assembly. The covering member includes plural pins. The bobbin is combined with the covering member, and includes a bobbin body and a channel. A first winding section and plural single-trough second winding sections are defined on the bobbin body. The single-trough second winding sections are arranged at bilateral sides of the first winding section. The channel runs through the bobbin body. The primary winding coil is wound around the first winding section of the bobbin, and connected with the pins. The secondary winding coils are wound around respective single-trough second winding sections of the bobbin. The magnetic core assembly is partially embedded into the channel of the bobbin.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: November 8, 2011
    Assignee: Delta Electronics, Inc.
    Inventors: Hsiang-Yi Tseng, Hsin-Wei Tsai
  • Patent number: 7948350
    Abstract: A coil component has a first core with a winding core portion, a second core with a winding core portion, a first coil wound on the winding core portion of the first core, and a second coil wound on the winding core portion of the second core. A part of the first coil is wound on the winding core portion of the second core. The first core and the second core are arranged as magnetically separated from each other.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: May 24, 2011
    Assignee: TDK Corporation
    Inventors: Atsushi Shoji, Masatoshi Shindoh
  • Patent number: 7948341
    Abstract: A coil for an inductive sensor, such as a coil which is used in a sensor that operates according to the principle of electromagnetic force compensation for converting an amount of force generated by a load applied to a force-measuring cell into an electrical signal, is provided with protection against the penetration of moisture. The protection includes a protective covering with a surface-smoothing undercoating applied to the coil, on which a second level of coverage is applied as a protective coating against the penetration of moisture.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: May 24, 2011
    Assignee: Mettler-Toledo AG
    Inventors: Jean-Maurice Tellenbach, Volker Ziebart, Hans-Rudolf Burkhard
  • Patent number: 7911306
    Abstract: A transformer board is disclosed. In some embodiments, the transformer board includes a base, a circuit board, a transformer having a first and second winding, a first and a second connector, a ribbon cable and a nonconductive fill material. The base has a recess within which the circuit board is positioned. The transformer is mechanically coupled to the circuit board. The first connector is configured to electrically couple to transducers within a pressure boundary of an ultrasonic flow meter and is electrically coupled to the second winding of the transformer. The ribbon cable is electrically coupled between the first winding of the transformer and the second connector. The nonconductive fill material is contained by the recess and encases the circuit board, the transformer, the coupling of the first connector to the second winding of the transformer, and the coupling of the ribbon cable to the first winding of the transformer.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: March 22, 2011
    Assignee: Daniel Measurement and Control, Inc.
    Inventor: Charles Robert Allen
  • Patent number: 7676922
    Abstract: A micro-electromechanical system (MEMS) inductor is formed in a saucer shape that completely surrounds a magnetic core structure which is formed from a ferromagnetic material. In addition, an array of MEMS inductors can be formed by dividing up the saucer-shaped MEMS inductor into a number of electrically-isolated MEMS inductor wedges.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: March 16, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Peter J. Hopper, Peter Johnson, Kyuwoon Hwang, Philipp Lindorfer
  • Publication number: 20090128274
    Abstract: Inductors using bulk metallic glass (BMG) material and associated methods are generally described. In one example, an apparatus includes an electrically conductive core material, an electrically insulative material coupled with the electrically conductive core material, and a magnetic bulk metallic glass (BMG) material coupled with the electrically insulative material, wherein the electrically conductive core material, the electrically insulative material, and the magnetic BMG material form an inductor.
    Type: Application
    Filed: November 20, 2007
    Publication date: May 21, 2009
    Inventors: Chang-min Park, Daewoong Suh
  • Publication number: 20090051473
    Abstract: Methods and apparatus for electromagnetic components comprise a core and a winding. The core and winding are configured to provide smaller and more effective electromagnetic components.
    Type: Application
    Filed: September 8, 2008
    Publication date: February 26, 2009
    Inventor: Grant MacLennan
  • Patent number: 7250841
    Abstract: A micro-electromechanical system (MEMS) inductor is formed in a saucer shape that completely surrounds a magnetic core structure which is formed from a ferromagnetic material. In addition, an array of MEMS inductors can be formed by dividing up the saucer-shaped MEMS inductor into a number of electrically-isolated MEMS inductor wedges.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: July 31, 2007
    Assignee: National Semiconductor Corporation
    Inventors: Peter J. Hopper, Peter Johnson, Kyuwoon Hwang, Philipp Lindorfer
  • Patent number: 6933828
    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.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: August 23, 2005
    Assignee: Tyco Electronics Corporation
    Inventors: Luis Orlando Puigcerver, David Edwin Bowling, Robert Paul Glembocki, Charles J. Connor, Jr.
  • Publication number: 20030234713
    Abstract: The coupling device of the present invention includes a housing, a first fastening member attached to said housing and coupled to the power line, a second fastening member attached to the housing and coupled to the power line, an inductor providing an impedance to data transmissions between the first fastening member and the second fastening member; a first conductor having a first end electrically coupled to the first fastening member; and a second conductor having a first end electrically coupled to the second fastening member. The second ends of the first conductor and second conductor providing data signals to a connector. In addition, the housing may include a transformer secured therein for coupling power transmissions to the connector.
    Type: Application
    Filed: June 21, 2002
    Publication date: December 25, 2003
    Inventors: Charles Franklin Pridmore, Joseph C. Roesch, James D. Mollenkopf, Brett Gidge, Steven R. Baker
  • Patent number: 6646531
    Abstract: A method for forming a resin molding on a coil of a transformer is disclosed. The method comprises the steps of inserting a coil into an auxiliary spacing apparatus, inserting the auxiliary spacing apparatus into a mold, and forming a resin molding for the auxiliary spacing apparatus with the coil by putting a resin into the mold. According to the methods, the coil is not damaged and a resin molding is formed with a uniform thickness.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: November 11, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Cheol-Jin Kim
  • Publication number: 20030076207
    Abstract: A microwave inductor including a coil with windings tapered from a first end of the coil to a second end of the coil to reduce resonant loss glitches found in conventional inductors which have uniform diameter windings. The coil further includes a core composed of a dielectric material containing a colloidal suspension of magnetic particles, the magnetic material preferably being iron powder and the dielectric preferably being epoxy, making the core a poly-iron material. The magnetic particles being colloidally suspended in dielectric increase the impedance of the coil at high frequencies to reduce resonant glitches without lowering the low frequency Q of the inductor. As such, a single coil can be utilized both in a filter which requires a low impedance at low frequencies to create a high Q, and as a bias line which operates at frequencies well beyond the resonant frequency of the inductor since a high impedance is provided by the core at higher resonant frequencies.
    Type: Application
    Filed: November 20, 2002
    Publication date: April 24, 2003
    Applicant: Anritsu Company
    Inventor: William W. Oldfield
  • Patent number: 6509821
    Abstract: A microwave inductor including a coil with windings tapered from a first end of the coil to a second end of the coil to reduce resonant loss glitches found in conventional inductors which have uniform diameter windings. The coil further includes a core composed of a dielectric material containing a colloidal suspension of magnetic particles, the magnetic material preferably being iron powder and the dielectric preferably being epoxy, making the core a poly-iron material. The magnetic particles being colloidally suspended in dielectric increase the impedance of the coil at high frequencies to reduce resonant glitches without lowering the low frequency Q of the inductor. As such, a single coil can be utilized both in a filter which requires a low impedance at low frequencies to create a high Q, and as a bias line which operates at frequencies well beyond the resonant frequency of the inductor since a high impedance is provided by the core at higher resonant frequencies.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: January 21, 2003
    Assignee: Anritsu Company
    Inventor: William W. Oldfield
  • Patent number: 6434057
    Abstract: A memory device has an output buffer. The output buffer is electrically connected to a data output port of a sense amplifier of the memory device for amplifying an output signal from the data output port. The output buffer has a detector for producing a control signal according to the output signal from the data output port, and an amplifier for amplifying the output signal from the data output port. The amplifier has an input port electrically connected to the data output port for accepting the output signal from the data output port, and a control terminal electrically connected to the output terminal of the detector for accepting the control signal from the detector to control operations of the amplifier. When the detector produces the control signal and transmits the control signal to the control terminal of the amplifier, the amplifier begins amplifying the output signal transmitted from the data output port to the input port of the amplifier.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: August 13, 2002
    Assignee: United Microelectronics Corp.
    Inventors: Shih-Huang Huang, Jui-Lung Chen
  • Publication number: 20020057183
    Abstract: A microwave inductor including a coil with windings tapered from a first end of the coil to a second end of the coil to reduce resonant loss glitches found in conventional inductors which have uniform diameter windings. The coil further includes a core composed of a dielectric material containing a colloidal suspension of magnetic particles, the magnetic material preferably being iron powder and the dielectric preferably being epoxy, making the core a poly-iron material. The magnetic particles being colloidally suspended in dielectric increase the impedance of the coil at high frequencies to reduce resonant glitches without lowering the low frequency Q of the inductor. As such, a single coil can be utilized both in a filter which requires a low impedance at low frequencies to create a high Q, and as a bias line which operates at frequencies well beyond the resonant frequency of the inductor since a high impedance is provided by the core at higher resonant frequencies.
    Type: Application
    Filed: February 20, 1998
    Publication date: May 16, 2002
    Inventor: WILLIAM W. OLDFIELD
  • Publication number: 20020008604
    Abstract: The magnetic core of an inductive device is formed of a plurality of wires that extend through the inductive device, and beyond the electric winding. The ends of the wires are formed around the electric winding, meet, and are connected together enveloping the magnetic core and windings forming a complete magnetic circuit. The inductive device may be a transformer with two or more windings, a choke coil with only one winding, or other inductive device. The electric windings may be wound directly onto the wire magnetic core, or may be formed separately and then placed on the magnetic core. A mounting post or the like may be bound into the core and used as a mount for the inductive device; and, cooling tubes and/or large rods for support may be incorporated into the core.
    Type: Application
    Filed: September 18, 2001
    Publication date: January 24, 2002
    Inventor: Harrie R. Buswell
  • Patent number: 6337615
    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.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: January 8, 2002
    Assignee: Tyco Electronics Logistics AG
    Inventors: Michael Dittmann, Angelo Polese
  • Patent number: 6078239
    Abstract: A high-frequency transformer, comprises: a ring core made of amorphous magnetic material; a core protection box made of conductive material and enclosing the ring core; and a high-voltage winding, consisting of enamel-insulated wire wound on the core protection box. Wherein, on the ring top wall of the core protection box there is a ring gap in the peripheral direction, and at inner fringe and outer fringe of the ring gap, a plurality of leading wires are respectively arranged in the peripheral direction. The leading wires at inner fringe and outer fringe of the ring gap are electrically-connected together respectively and form two terminals. The core protection box and the two terminals constitute low-voltage winding of the high-frequency transformer. If the low-voltage winding comprises two or more core protection boxes, it can have a central tap or have multi-turn. A thus fabricated high-frequency transformer has a smaller size, a lighter weight and is more apt to industrial batch manufacture.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: June 20, 2000
    Assignees: Suzhen Hu, Li Zhang
    Inventor: Suzhen Hu
  • Patent number: 5982263
    Abstract: Transformer (1) for switched-mode power supply, equipped with a former (6) having chambers (9), each chamber (9) containing windings (15, 16), each winding (15, 16) having an outer side surface (18) generated by a straight line moving parallel to an axis (AA') of the former, and characterized in that the generatrices of all the outermost surfaces (18) of the windings (15, 16) contained in each of the chambers (9) are identically the same for all the outermost surfaces (18) of the windings (15, 16) of each of the chambers, these generatrices thus forming a unique cylindrical surface parallel to the axis (AA') of the former (6).
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: November 9, 1999
    Assignee: Thomson Television Components France
    Inventors: Jean-Michel Bouillot, Thierry Coutureau, Herve Faivre, Denis Larche
  • Patent number: 5705971
    Abstract: A transformer including a core; a concentric inner primary tube passing through the core and running up and over at least a portion of the core, the concentric inner primary tube defining a longitudinal axis within the core; and a concentric outer secondary tube passing through the core and running up and over the concentric inner primary tube, the concentric outer secondary tube defining a longitudinal axis within the core and being spaced apart from the concentric inner primary tube, the longitudinal axis of the concentric inner primary tube and the longitudinal axis of the concentric outer secondary tube being aligned with one another so as to be coaxial. The concentric outer secondary tube substantially encloses the concentric inner primary tube so as to provide a low impedance shield.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: January 6, 1998
    Assignee: Allen-Bradley Company, Inc.
    Inventor: Gary Skibinski
  • Patent number: 5559486
    Abstract: Disclosed a high-frequency core bobbin which comprises: a winding bobbin member on which a wingding is to be wound; a first bobbin member for accommodating therein a predetermined portion of the winding bobbin; a second bobbin member coupled with the first bobbin coaxially so as to cover a portion of the winding bobbin member exposed from the first bobbin member, or put on the first bobbin member in the axial direction so as to shut off a space portion of a portion opposite to the winding bobbin member; and a leading-out guide provided on the second bobbin member for insertion and leading-out of lead wires of the winding.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: September 24, 1996
    Assignees: Tohoku Ricoh Co., Ltd., Tsuneo Ikenoue
    Inventors: Tsuneo Ikenoue, Hisahiro Kamata
  • Patent number: 5477027
    Abstract: An electrical soldering device in the form of a soldering gun has a transformer disposed in a housing with a primary winding and a secondary winding. The transformer is supplied from an A.C. source, such as a voltage mains. The soldering tip is in the form of a resistance wire bent into a loop and connected to the secondary winding of said transformer. The secondary winding of the transformer is formed of a cylindrical sleeve of metallic material, preferably copper, surrounding the coil of the primary winding. The cylindrical sleeve has a continuous slit formed therein extending approximately parallel to its cylinder axis. The slit defines mutually opposite edge regions to which the resistance wire is connected. A frequency converter connected in the current supply line to the transformer increases the frequency, preferably into the kilohertz range.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: December 19, 1995
    Inventors: Laszlo Biro, Franz Molnar, Attila Toth
  • Patent number: 5469334
    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.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: November 21, 1995
    Assignee: Power Integrations, Inc.
    Inventor: Balu Balakrishnan
  • Patent number: 5459395
    Abstract: An alternating current sensor for measuring a primary alternating current inducing a magnetic flux density defined over a known region comprises: a first sensor for measuring changes in magnetic flux due to the primary current over a first predetermined area included within the known region; a second sensor for measuring changes in magnetic flux due to the primary current over a second predetermined area within the known region, the changes in magnetic flux measured by the second sensor being a predetermined amount different from the changes in magnetic flux measured by the first sensor; and a current source for generating a current inducing changes in magnetic flux over a third predetermined area to offset the difference between the changes in magnetic flux measured by the first sensor and the changes in magnetic flux measured by the second sensor.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: October 17, 1995
    Assignee: General Electric Company
    Inventor: Ertugrul Berkcan
  • Patent number: 5453681
    Abstract: An alternating current sensor employing a mutually-inductive current sensing scheme comprises a conductive pipe and a cylindrical-shaped conductive element at least partially surrounded by the pipe. The pipe is substantially concentric to the conductive element and a conductor electrically connects a pair of corresponding ends of the pipe and conductive element to form a connected conductive path through the sensor. The conductive element may include a passage or opening shaped to form a magnetic field within the passage during current flow along the conductive path.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: September 26, 1995
    Assignee: General Electric Company
    Inventors: Ertugrul Berkcan, John E. Hershey
  • Patent number: 5416408
    Abstract: An alternating current sensor employing a mutually-inductive current sensing scheme comprises a conductive pipe and a cylindrical-shaped conductive element at least partially surrounded by the pipe. The pipe is substantially concentric to the conductive element and a conductor electrically connects a pair of corresponding ends of the pipe and conductive element to form a connected conductive path through the sensor. The pipe and the conductive element are spaced apart a predetermined radial distance to form a magnetic field in the space between the pipe and conductive element during current flow along the conductive path.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: May 16, 1995
    Assignee: General Electric Company
    Inventors: Ertugrul Berkcan, John E. Hershey
  • Patent number: 5302931
    Abstract: A method of manufacturing a coil for a transformer and in particular a high voltage transformer in which the starting end of a wire with a bondable thermoplastic sheet is electrically conductively connected to an axially slit sleeve of non-magnetic metal which sleeve is placed on a rotary winding tool to form an essentially cylindrical wire winding directly on the sleeve with the end faces of the sleeve extending beyond the winding. Heat is applied to the winding to bond the individual turns to each other. One end of the sleeve carrying the winding is placed on the bottom of a casting mold and the end of the wire remote from the starting end is connected to a terminal. A casting compound is introduced into the mold to anchor the connecting terminal. The outside of the casting compound is provided with an electrically conductive casing which is electrically connected to the sleeve.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: April 12, 1994
    Assignee: Haugh GmbH & Co. KG
    Inventor: Edwin Muz
  • Patent number: 5122773
    Abstract: A device for injecting an electromagnetic signal into a conductive cable to be tested, the device being generally cylindrical and having a central bore through which the cable passes. A plurality of concentric cylinders is arranged around the central bore, including an inner conductive cylinder, an intermediate ferromagnetic cylinder and an outer conductive cylinder. The inner and outer cylinders are connected at one end to a signal generator by coaxial cable, and are interconnected at the opposite end.
    Type: Grant
    Filed: September 13, 1989
    Date of Patent: June 16, 1992
    Assignee: Prana Recherche et Developpement
    Inventor: Jacques Chahbazian
  • Patent number: 5066904
    Abstract: A sensor for measuring large magnitudes of A.C. current utilizes a current divider having parallel conductors and a current comparator coupled to one of the conductors so arranged as to perform first and second stages of scaling of the A.C. current to obtain an output signal from the sensor proportional to the A.C. current. The overall sensor ratio is the product of the ratios of the first and second stages, thereby permitting very large ratios to be obtained. Components of the sensor are arranged so as to cause cancellation of magnetic fields by the sensor and to make the sensor immune from incident magnetic fields.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: November 19, 1991
    Assignee: General Electric Company
    Inventor: Donald F. Bullock
  • Patent number: 4868532
    Abstract: Described is a transformer having a two-piece primary winding and housing wherein the second piece is mechanically received within the first piece and electrically coupled together.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: September 19, 1989
    Assignee: LTV Aerospace & Defense Company
    Inventors: Dan Ehrenhalt, George R. Giles
  • Patent number: 4868533
    Abstract: Described is a transformer wherein the primary winding is formed from the same unitary piece of electrically conductive metal that comprises the housing of the transformer.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: September 19, 1989
    Assignee: LTV Aerospace & Defense Company
    Inventors: Dan Ehrenhalt, George R. Giles
  • Patent number: 4839616
    Abstract: A transformer for modifying the characteristics impedance of a transmission line. The transformer provides non-integer-squared impedance transformation ratios without the need for tapping one of the windings or the use of other non-balanced techniques.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: June 13, 1989
    Assignee: Harris Corporation
    Inventor: Will Herzog
  • Patent number: 4624884
    Abstract: A thermosetting synthetic resin composition consisting mainly of, for example, an epoxy resin is melted at a temperature of 70.degree. to 130.degree. C. After adding a filler to the resin composition, the resultant mixture is kneaded and rapidly cooled. The composition consists of a thixotropy agent, a leveling agent, etc., in addition to the epoxy resin and a curing agent for the epoxy resin. Aluminum as the filler is added in the amount of 30 wt % to 100 wt % of the mixture. The mixture of the composition with the filler is kneaded and rapidly cooled and is then pulverized to prepare a powder. The powder coating thus obtained is coated on a coil and is cured to provide a heat radiating insulator.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: November 25, 1986
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hitoshi Harada, Yasumi Ohsera
  • Patent number: 4623865
    Abstract: A sensing current transformer having a single turn primary winding for ground fault circuit interrupters and breakers utilizes a conductive post extending through the transformer metallic enclosure in combination with the conductive path across the metallic closure as the current sensing path. A four turn primary winding is provided by four metallic staples, each having one leg extending through the transformer aperture, for establishing four independent current sensing paths.
    Type: Grant
    Filed: May 9, 1985
    Date of Patent: November 18, 1986
    Assignee: General Electric Company
    Inventors: George W. Kiesel, Paul T. Rajotte, LeeAnne Wambolt