Core Forms Casing Patents (Class 336/83)
  • CHOKE HAVING A CORE WITH A PILLAR HAVING A NON-CIRCULAR AND NON-RECTANGULAR CROSS SECTION
    Publication number: 20120086534
    Abstract: A choke includes a single-piece core entirely made of a same material, the single-piece core having two boards and a pillar located between the two boards, a winding space being located among the two boards and the pillar, wherein the pillar has a non-circular and non-rectangular cross section along a direction substantially perpendicular to an axial direction of the pillar, the cross section of the pillar has a first axis and a second axis intersecting with each other at a center of the cross section of the pillar and are substantially perpendicular with each other, the first axis is longer than the second axis, and the cross section of the pillar is substantially symmetrical to both of the first axis and the second axis.
    Type: Application
    Filed: December 20, 2011
    Publication date: April 12, 2012
    Inventors: Tsung-Chan Wu, Roger Hsieh, Yi-Min Huang, Lan-Chin Hsieh, Yu-Ching Kuo
  • Current-compensated choke and method for producing a current-compensated choke
    Patent number: 8138878
    Abstract: The invention relates to a current-compensated choke with a ring core at least two coils composed in each case of the same number of windings, wherein in the interior of the ring core a non-conductive body is arranged with holes embodied in pairs in a mirror symmetrical manner to a symmetry axis of the ring core, wherein respectively one winding is guided through each hole of at least some of the pairs of symmetrical holes, and windings corresponding to one another of different coils are guided through the two holes comprising a pair, and a method for producing a current-compensated choke of this type.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: March 20, 2012
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Harald Hundt, Hartmut Schoenbohm, Dieter Proksch, Klemens Trabold, Michael Engelstädter
  • Inductance element and method for manufacturing the same
    Patent number: 8111124
    Abstract: An inductance element is not interfered by peripheral circuits when mounted on a wiring board by forming a closed magnetic path. The inductance element has a small reduction of an inductance value when a direct current is superimposed, and thus has excellent direct current superimposition characteristics. The temperature coefficient of the magnetic permeability of a ferrite sintered body which constitutes a magnetic core can be positive. The temperature coefficient of the magnetic permeability of a soft magnetic resin provided as an external covering to cover a coil and to fill a space between flange sections of the magnetic core is permitted to be ?30 ppm/° C. or less.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: February 7, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Akio Hagiya
  • Power inductor with reduced DC current saturation
    Patent number: 8098123
    Abstract: A power inductor includes a first magnetic core having a first end and a second end, an inner surface and an outer surface, and an inner cavity defined by the inner surface. A slotted air gap in the first magnetic core extends from i) the first end to the second end and ii) from the inner surface to the outer surface. A second magnetic core is located inside the slotted air gap between opposing inner walls of the slotted air gap. The second magnetic core i) extends from the inner surface to the outer surface of the first magnetic core inside the slotted air gap and ii) has a shape configured to lock the second magnetic core between the opposing inner walls of the slotted air gap.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: January 17, 2012
    Assignee: Marvell World Trade Ltd.
    Inventor: Sehat Sutardja
  • Surface mount pulse transformer and method and apparatus for manufacturing the same
    Patent number: 8093980
    Abstract: A surface mount pulse transformer has a drum type core including a core and first and second flanges disposed on both ends of the core and installed on a substrate and a primary winding wire and a secondary winding wire wound around the core and provided with an intermediate tap, respectively, wherein first and second terminal electrodes being connected to each of both ends of the primary winding wire and a third terminal electrode for connecting being connected to the intermediate tap of the secondary winding wire are disposed on the surface of the first flange and a fourth terminal electrode being connected to the intermediate tap of the primary winding wire and fifth and sixth terminal electrodes being connected to each of both ends of the secondary winding wire are disposed on the surface of the second flange.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: January 10, 2012
    Assignee: TDK Corporation
    Inventors: Hirohumi Asou, Mitsutaka Yasuda, Satoru Sariishi, Satoru Kitahara
  • Inductive Structure and Method of Forming the Inductive Structure with an Attached Core Structure
    Publication number: 20110310579
    Abstract: An inductor is formed on a wafer by attaching a first core structure to the wafer with a pick and place operation, forming a coil with one or more thick metal layers over the first core structure, and then attaching a second core structure to the first core structure with the pick and place operation after the coil has been formed. In addition, the pick and place operation can also be used to attach one or more integrated circuits to the wafer to form an integrated inductive device.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 22, 2011
    Inventors: Peter Smeys, Andrei Papou
  • Inductor
    Patent number: 8072303
    Abstract: An inductor is arranged such that the projection area of each terminal portion falls within a square circumscribing the projection area of an upper flange portion under a state where the inductor is projected orthogonally in the direction of the axis. Projection area of each end of a winding connected to the joint of the terminal portions also falls within the square. Consequently, an installation space can be secured easily on a board, and a space saving inductor in which a space for installation of other components can be secured easily on the periphery can be obtained.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: December 6, 2011
    Assignee: Sumida Corporation
    Inventor: Juichi Oki
  • Methods of making coil transducers
    Patent number: 8061017
    Abstract: Various embodiments of means and methods for reducing the pick-up of electromagnetic interference (“EMI”) by coil transducers are described and shown that are configured to provide high voltage isolation and high voltage breakdown performance characteristics in small packages. In some embodiments, the lengths, heights, and horizontal distances between wires electrically connecting transmitter circuits and receiver circuits to coil transducers are minimized and optimized respecting one another.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: November 22, 2011
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Julie E. Fouquet, Richard A Baumgartner, Gary R. Trott
  • Inductive component for high currents and method for the production thereof
    Patent number: 8063728
    Abstract: An inductive component includes a closed magnetic core and a first conductor that runs at least twice through the interior of magnetic core. The first conductor is a solid conductor that includes several U-shaped pre-bent parts that are tightly connected to one another. The U-shaped pre-bent parts may be each be flat conductors. Flat sections of the flat conductors may run in planes oriented transversely to one another.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: November 22, 2011
    Assignee: EPCOS AG
    Inventors: Roman Brunel, Josef Feth, Gerd Riedel
  • Coil component and power-supply device provided therewith
    Patent number: 8058963
    Abstract: The coil component includes a magnetic core 130 and conductors 210 and 220. The magnetic core 130 includes through-holes that are made by grooves 111 and 112. The conductors 210 and 220 are provided in the grooves 111 and 112, respectively. The magnetic core 130 includes a nonmagnetic portion in which the grooves 111 and 112 are communicated, and a distance between the conductors 210 and 220 through the nonmagnetic portion is shorter than a distance between the conductors 210 and 220 in surfaces 110c and 110d in which the conductors 210 and 220 are exposed. Therefore, necessity to provide a large cavity in the magnetic core is eliminated, and a risk of the short circuit between terminal electrodes exposed in the surfaces 110c and 110d is also eliminated.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: November 15, 2011
    Assignee: TDK Corporation
    Inventors: Katsuharu Yasuda, Kiyofumi Fujiwara, Masatoshi Shindo
  • Compact inductor and a method for manufacturing the same
    Patent number: 8054151
    Abstract: A compact inductor comprises a coil, a coil-burying body, and a body for a closed magnetic circuit. The coil-burying body is a fired porous ceramic body having a first magnetic permeability, in which the coil is buried. In the coil-burying body, “a through-hole 12a passing through inside of the coil along an axis of the coil” is formed. The body for a closed magnetic circuit is a fired dense ceramic body having a second magnetic permeability greater than the first magnetic permeability. The body for a closed magnetic circuit is arranged closely/densely at an outer circumference portion of the coil-burying body and in the through-hole. A magnetic path is therefore formed mainly within the body for a closed magnetic circuit, and the magnetic flux density is reduced in an area close to the coil. Accordingly, an inductor having the excellent superimposed DC current characteristic is provided.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: November 8, 2011
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuyuki Kobayashi, Kazuyuki Mizuno, Natsumi Shimogawa, Shuichi Ozawa
  • Monolithic inductor
    Patent number: 8054149
    Abstract: This invention discloses a monolithic inductor including a body made by compressing a magnetic powder, a coil positioned in the body, and a permanent magnet positioned in the body and in a magnetic circuit formed by applying current to the coil. The monolithic inductor of this invention includes the magnetic body containing the permanent magnet and the coil. The permanent magnet in the magnetic circuit (path of magnetic flux lines) formed by applying current to the coil generates a reverse-bias magnetic field, thereby increasing the operating range of the magnetic body, the saturation current of the magnetic body, and the rated current of the inductor.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: November 8, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Mean-Jue Tung, Wen-Song Ko, Yu-Ting Huang, Yen-Ping Wang
  • Magnetic element
    Patent number: 8054150
    Abstract: A magnetic element includes a conducting winding structure, first and second magnetic parts, and first and second side posts. The first and second magnetic parts have first and second central posts that are aligned with each other. The first side post is disposed on an edge of the first or second magnetic part. The second side post is disposed on another edge of the first or second magnetic part where no side post is disposed or the first side post is not aligned with. The conducting winding structure is sandwiched between the first and second magnetic parts. The first and second side posts are aligned with corresponding edges wherein no side post is disposed. Consequently, the overall height of the first and second central post is less than the height of the first or second side post and an air gap is defined between the first and second central post.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: November 8, 2011
    Assignee: Delta Electronics, Inc.
    Inventors: Hsin-Wei Tsai, Shih-Hsien Chang
  • Coil device
    Patent number: 8049588
    Abstract: A coil device includes first and second coils and a package for sealing the first and second coil. The first coil has a first winding including a first conductor wire wound about a first winding axis, and first and second ends which are both ends of the first conductor wire. The second coil has a second winding including a second conductor wire wound about a second winding axis, and third and fourth ends which are both ends of the second conductor wire. The second winding axis is arranged with the first winding axis. The second end of the first coil is connected with the third end of the second coil. The first end of the first coil and the fourth end of the second coil are adapted to be connected to an outside of the package. This coil device reduces magnetic flux leakage to outside of the package.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: November 1, 2011
    Assignee: Panasonic Corporation
    Inventors: Tomonori Shibuya, Tsunetsugu Imanishi
  • Common-mode choke coil
    Patent number: 8044753
    Abstract: A common-mode choke coil includes a core, external electrodes, a pair of wires, and a top plate. The core includes a winding core portion and a pair of flanges at both ends of the winding core portion. The upper surface of the winding core portion and the upper surfaces of the flanges are covered with a metal film. The external electrodes are provided on lower portions of the flanges. A pair of wires are wound on the winding core portion of the core, and the ends of the wires are connected to the external electrodes. The top plate is bonded to the upper surfaces of the flanges preferably via an adhesive.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: October 25, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takahiro Azuma, Tetsuya Morinaga, Takahiro Aoki, Yoshie Nishikawa, Shinya Hirai, Yoshimasa Goto, Yasushi Saito, Yu Ishiwata
  • Low profile inductors for high density circuit boards
    Patent number: 8040212
    Abstract: An inductor includes a core formed of a magnetic material and a foil winding wound at least partially around or through at least a portion of the core. A first end of the winding extends away from the core to form an extended output tongue configured and arranged to supplement or serve as a substitute for a printed circuit board foil trace. A second end of the winding forms a solder tab. At least a portion of the extended output tongue and the solder tab are formed at a same height relative to a bottom surface of the core. Another inductor includes a core formed of a magnetic material, a winding wound at least partially around or through at least a portion of the core, and a ground return conductor attached to the core. The core does not form a magnetic path loop around the ground return conductor.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: October 18, 2011
    Assignee: Volterra Semiconductor Corporation
    Inventor: Alexandr Ikriannikov
  • MAGNETIC COMPONENT AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20110234353
    Abstract: A reactor (magnetic component) has a core that constitutes a magnetic circuit of a magnetic flux generated by energizing a coil. The coil has a cylindrical wound part made of a lead wire wound like a cylinder, and a pair of terminals that has both ends of the wound part projected from one end in an axial direction. The pair of terminals is made of a first terminal formed by leading out an end of the lead wire from a first end portion (one end portion in an axial direction) of the wound part, and a second terminal, which penetrates inside the wound part in the axial direction, formed by leading out another end of the lead wire from a second end portion (another end portion in the axial direction) of the wound part.
    Type: Application
    Filed: March 29, 2011
    Publication date: September 29, 2011
    Applicant: DENSO CORPORATION
    Inventor: Kouji FUJIMURA
  • Coil component
    Patent number: 8013704
    Abstract: A coil component comprises: a core having a winding core portion, and a first flange and a second flange arranged at both ends of the winding core portion; a winding arranged in a region flanked by the first and second flanges, and wound so as to be in contact with the winding core portion; and a cover portion arranged in a region flanked by the first and second flanges, so as to cover the winding. The cover portion has a first cover portion comprising a resin cured product containing a magnetic material; and a second cover portion comprising a non-magnetic material. The second cover portion is interposed at least between the first flange and the first cover portion.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: September 6, 2011
    Assignee: TDK Corporation
    Inventors: Yoshiaki Kitajima, Masatoshi Shindoh
  • High powered inductors using a magnetic bias
    Patent number: 8004379
    Abstract: A biased gap inductor includes a first ferromagnetic plate, a second ferromagnetic plate, a conductor sandwiched between the first ferromagnetic plate and the second ferromagnetic plate, and an adhesive between the first ferromagnetic plate and the second ferromagnetic plate, the adhesive comprising magnet powder to thereby form at least one magnetic gap. A method of forming an inductor includes providing a first ferromagnetic plate and a second ferromagnetic plate and a conductor, placing the conductor between the first ferromagnetic plate and the second ferromagnetic plate, adhering the first ferromagnetic plate to the second ferromagnetic plate with a composition comprising an adhesive and a magnet powder to form magnetic gaps, and magnetizing the inductor.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: August 23, 2011
    Assignee: Vishay Dale Electronics, Inc.
    Inventor: Thomas T. Hansen
  • Transformer
    Patent number: 8004380
    Abstract: A transformer 10 has a first core CR1, a second core CR2, a first transformer primary winding W1, a coil 45, a coil 46 and a coil 47. The second core CR2 is integrally formed with the first core CR1. The first transformer primary winding W1 is wound onto the first core CR1. The coil 45 is wound onto the first core CR1 and forms a transformer T1 together with the first transformer primary winding W1. The coil 46 is wound around the first core CR1 and forms a transformer T2 together with the first transformer primary winding W1. The coil 47 is connected to the coil 45 and coil 46 and forms an output coil using the second core CR2 as a magnetic core.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: August 23, 2011
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventor: Sergey Moiseev
  • Wire-wound coil and method for manufacturing wire-wound coil
    Patent number: 7999648
    Abstract: A wire-wound coil has a characteristic impedance that can be flexibly adjusted and can be prevented from varying undesirably. In the coil of the present invention, a primary wire part 18A and a secondary wire part 18B are wound around the surface of a core portion 14 so as to be separated from each other by a fixed distance. At the same time, at least one portion the secondary wire part 18B in a prior turn section 19X and at least one portion of the primary wire part 18A in a subsequent turn section 19Y are in close contact with each other, wherein the wire parts 18A and 18B are wound in different turns and are adjacent to each other on the same surface of the core portion 14. A method for manufacturing the wire-wound coil is also disclosed.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: August 16, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Keigo Nakatani, Yoshie Nishikawa
  • Composite magnetic device
    Patent number: 7999646
    Abstract: To provide a composite magnetic device having characteristics of two magnetic elements, being capable of reducing a manufacturing cost, and preferably enabling the respective magnetic elements to easily exhibit the same characteristics.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: August 16, 2011
    Assignee: Sumida Corporation
    Inventor: Satoshi Minamidate
  • Multi-turn inductors
    Patent number: 7994888
    Abstract: A multi-winding inductor includes a first foil winding and a second foil winding. One end of the first foil winding extends from a first side of the core and wraps under the core to form a solder tab under the core. One end of the second foil winding extends from a second side of the core and wraps under the core to form another solder tab under the core. Respective portions of each solder tab are laterally adjacent under the magnetic core. A coupled inductor includes a magnetic core including a first and a second end magnetic element and a plurality of connecting magnetic elements disposed between and connecting the first and second end magnetic elements. A respective first and second single turn foil winding is wound at least partially around each connecting magnetic element. Each foil winding has two ends forming respective solder tabs.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: August 9, 2011
    Assignee: Volterra Semiconductor Corporation
    Inventor: Alexandr Ikriannikov
  • Method for making a high current low profile inductor
    Patent number: 7986207
    Abstract: A high current, low profile inductor includes a conductor coil surrounded by magnetic material to form an inductor body. An inductor body is formed around the inductor coil and includes a resin and a magnetic material compressed while it is dry and surrounding the inside and the outside of the coil.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: July 26, 2011
    Assignee: Vishay Dale Electronics, Inc.
    Inventors: Timothy M. Shafer, Brett W. Jelkin
  • DC to DC converter module
    Patent number: 7973633
    Abstract: Lower surface terminals are disposed at the lower surface of a magnetic substrate. An upper surface electrode is disposed at the upper surface of the magnetic substrate. A control circuit, an input capacitor, and an output capacitor are mounted on the upper surface electrode. The control circuit contains a switching element. A smoothing choke is disposed inside the magnetic substrate. The connection wiring of connecting the upper surface electrode and at least one of the input terminal, the output terminal, and the ground terminal is constructed using an inner conductor passing through the inside of the magnetic substrate, and the connection wiring forms an inductor.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 5, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takashi Noma, Nobuo Ikemoto, Yoshihiko Nishizawa
  • Inductor
    Patent number: 7969266
    Abstract: Provided is an inductor capable of adjusting an inductance in dozens of nH increments without requiring a large number of components. The inductor includes: a conductor; a first core body and a second core body each having an opposed surface, the opposed surface of the first core body and the opposed surface of the second core body facing each other so as to enclose the conductor; and a holding part provided with a slide surface for varying an opposed area of the opposed surfaces of the first core body and the second core body, for holding at least one of the first core body and the second core body at a desired position.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: June 28, 2011
    Assignee: Sumida Corporation
    Inventors: Kan Sano, Yuichiro Urano
  • Planar core structure
    Patent number: 7969272
    Abstract: Generally, a low-profile planar core structure for use in magnetic components and related processes are presented herein. More specifically, the planar core structure provides a relatively large winding area that reduces heat dissipation, reduces leakage inductance, and allows for a low-profile design. The planar core structure has a center core that is elongated along a horizontal axis. Furthermore, conductors may enter and exit the planar core structure without increasing its height.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: June 28, 2011
    Assignee: Flextronics AP, LLC
    Inventors: Antony Brinlee, Arturo Silva
  • Thin film structures with negative inductance and methods for fabricating inductors comprising the same
    Patent number: 7956715
    Abstract: An inductor structure comprising a substrate and a planar conductor structure on a surface of the substrate, and methods for fabricating an inductor structure. The planar conductor structure may comprise a vertical stack of three or more multilayer films. Each multilayer film may comprise a first layer of a first metal, defining a first vertical thickness, and a second layer of a second metal, defining a second vertical thickness. The metals and thicknesses are chosen such that the inductor exhibits a negative electrical self-inductance when an electrical signal is transmitted from a first contact point to a second contact point.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: June 7, 2011
    Assignee: University of Dayton
    Inventors: Agus Widjaja, Andrew Sarangan
  • Coil component
    Patent number: 7952457
    Abstract: A coil component that can be mounted on a printed circuit board, with a part in an aperture of the printed circuit board. The coil component includes a first flange on an upper side and a second flange. Terminal boards are on respective opposite sides of the first flange. Terminals respectively project in a direction perpendicular to an axial direction of a winding drum, from the terminal boards and bend and are inserted into through-holes of the printed circuit board. First and second touching surfaces, which are parts of a downside surface of the second flange, touch an upside surface of the printed circuit board.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: May 31, 2011
    Assignee: TDK Corporation
    Inventors: Kenichi Yamaguchi, Nobuo Kitajima
  • Three-phase multi-winding device
    Patent number: 7948340
    Abstract: A three-phase, multi-winding includes a core, the core including a hub and an outer shell around a perimeter of the hub. wherein the hub and the outer shell are in a fixed position with respect to each other. The core also includes multiple slots. In addition to the core, the multi-winding device includes a primary winding positioned in at least two of the slots; and multiple spatially distributed secondary windings, wherein at least one of the secondary windings is positioned proximate the primary winding in at least one of the two slots.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: May 24, 2011
    Assignee: Siemens Industry, Inc.
    Inventors: Mukul Rastogi, Richard H. Osman, Peter Willard Hammond, Marc F. Aiello
  • Cross-core transformer
    Patent number: 7948348
    Abstract: Core structures that may be used in transformers to improve the number of turns-ratios available. The core structures may include at least three outer legs and a center leg. In operation windings of the transformer may be wrapped around the center leg (e.g., using a bobbin) a fractional number of times, such that the turns-ratio of the transformer may be more finely selected without increasing the number of turns required. Additionally, the outer legs may have different cross-sectional areas, such that even more fractional turns-ratios are available.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: May 24, 2011
    Assignee: Flextronics AP, LLC
    Inventor: Arturo Silva
  • Coil component
    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
  • COIL COMPONENT
    Publication number: 20110115592
    Abstract: A coil component comprises: a core having a winding core portion, and a first flange and a second flange arranged at both ends of the winding core portion; a winding arranged in a region flanked by the first and second flanges, and wound so as to be in contact with the winding core portion; and a cover portion arranged in a region flanked by the first and second flanges, so as to cover the winding. The cover portion has a first cover portion comprising a resin cured product containing a magnetic material; and a second cover portion comprising a non-magnetic material. The second cover portion is interposed at least between the first flange and the first cover portion.
    Type: Application
    Filed: January 26, 2011
    Publication date: May 19, 2011
    Applicant: TDK CORPORATION
    Inventors: Yoshiaki KITAJIMA, Masatoshi Shindoh
  • Inductance element
    Patent number: 7940153
    Abstract: An inductance element has a first core portion having a winding frame portion; a coil provided on the winding frame portion; a ring-shaped member having an insertion hole to dispose the first core portion therein; and a terminal member having an bonding arm to be fixed to the ring-shaped member via an adhesive member, and a mounting portion.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: May 10, 2011
    Assignee: Sumida Corporation
    Inventor: Tsutomu Watanabe
  • Wire-wound type coil and winding method therefor
    Patent number: 7932803
    Abstract: A common-mode choke coil includes a magnetic core, external electrodes, first and second wires, and a magnetic top. The magnetic core includes a winding core section and first and second flange sections. The external electrodes are provided on the first and second flange sections. The first wire is directly wound around the winding core section. The second wire is wound around the outside of the first wire. The first turn of the second wire is wound while being in contact with the first turn of the first wire and the first flange section.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: April 26, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Shinya Hirai
  • Method for making a high current low profile inductor
    Patent number: 7921546
    Abstract: A method for making a high current low profile inductor includes forming an inductor element comprising a coil having an open center and an outside surface, the coil also having first and second coil ends, making a dry mixture comprising a dry resin and an insulated dry powdered magnetic powder, and compressing the dry mixture around the outside surface of the coil and within the open center of the coil to create an inductor body without liquefying the dry mixture, whereby the inductor body engages the coil both within the coil open center and also the coil outside surface.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: April 12, 2011
    Assignee: Vishay Dale Electronics, Inc.
    Inventors: Timothy M. Shafer, Brett W. Jelkin
  • Inductor packaging for power converters
    Patent number: 7924134
    Abstract: A vehicular power converter includes switches and first and second inductive components. The first and second inductive components have substantially adjacent portions and are coupled to the plurality of switches such that when current flows from the plurality of switches and through the first and second inductive components, flux generated by the current flowing through the adjacent portions of the first and second inductive components and located between the adjacent portions is oriented in substantially opposite directions.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: April 12, 2011
    Assignee: GM Global Technology Operations LLC
    Inventor: Keming Chen
  • Coil device for antenna and antenna system for rear window of vehicle
    Patent number: 7920041
    Abstract: In a coil device for an antenna, a wide surface of a connector connecting section and a mounting surface of a fixing section are substantially vertically arranged. A connecter terminal can take a first arrangement or a second arrangement to a resin member. In the first arrangement the connector terminal can take, the connector connecting section is positioned on one end side in the width direction of the resin member, and in the second arrangement, the connector connecting section is positioned on the other end side in the width direction of the resin member by turning the connector connecting section in the first arrangement 180 degrees.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: April 5, 2011
    Assignee: Sumida Corporation
    Inventors: Takanobu Rokuka, Shigeru Mahara
  • Low Cost Charger Transformer
    Publication number: 20110074532
    Abstract: A cost effective integrated automotive solution for a charger transformer with minimized fringing flux and core grounding for reducing electromagnetic interference (EMI). The method provides an air gap filled with a mixture of an adhesive and ferrite powder that bonds the ferrite core sections together. In addition, the ground pin of the transformer is exposed through a groove in the pocket of the bobbin on which the core is mounted and an electrical contact is established between the exposed end of the ground pin and the core surface by means of a drop of epoxy.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Applicant: Astec International Limited
    Inventors: Wo Oi Cheng, Alfredo Grueso
  • Acoustic noise reduction in power supply inductors
    Patent number: 7915987
    Abstract: Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled from the inductor coil to the outside of the housing through corresponding apertures in the housing, comprising electrical leads for the inductor coil; and (4) a predetermined amount of adhesive in the apertures that bonds the wires to the housing to reduce an audible noise produced when the current through the inductor coil is cycled quickly.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: March 29, 2011
    Assignee: Apple Inc.
    Inventor: Dayu Qu
  • Semiconductor device interconnecting unit, semiconductor device and high-frequency module having a millimeter wave band
    Patent number: 7907924
    Abstract: A semiconductor device interconnecting unit configured to input/output a high-frequency signal having a millimeter wave band to/from a semiconductor device is provided. The semiconductor or device interconnecting unit includes a part of a band pass filter configured to pass therethrough the high-frequency signal having a millimeter wave band by using an LC resonance circuit, and a remainder of the band pass filter, wherein the part and the remainder are separated from each other. The part is provided inside the semiconductor device, and the remainder is provided outside the semiconductor device. The part and the remainder include capacitors having variable capacitors added thereto, respectively. A pass band for the high-frequency signal having a millimeter wave band is changed by changing capacitance values of the variable capacitors.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: March 15, 2011
    Assignee: Sony Corporation
    Inventor: Kenichi Kawasaki
  • Coil component
    Patent number: 7898375
    Abstract: A coil component comprises: a core having a winding core portion, and a first flange and a second flange arranged at both ends of the winding core portion; a winding arranged in a region flanked by the first and second flanges, and wound so as to be in contact with the winding core portion; and a cover portion arranged in a region flanked by the first and second flanges, so as to cover the winding. The cover portion has a first cover portion comprising a resin cured product containing a magnetic material; and a second cover portion comprising a non-magnetic material. The second cover portion is interposed at least between the first flange and the first cover portion.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: March 1, 2011
    Assignee: TDK Corporation
    Inventors: Yoshiaki Kitajima, Masatoshi Shindoh
  • Current transformer cores formed from magnetic iron-based alloy including final crystalline particles and method for producing same
    Patent number: 7861403
    Abstract: A current transformer core has a ratio of the core outside diameter Da to the core inside diameter Di of <1.5, a saturation magnetostriction ?s of =|4| ppm, a circular hysteresis loop with 0.50=Br/Bs=0.85 and an Hcmax=20 mA/cm. The current transformer core is made of a soft magnetic iron alloy in which at least 50% of the alloy structure is occupied by fine-crystalline particles with an average particle size of 100 nm or less, and the iron-based alloy comprises, in essence, one combination.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: January 4, 2011
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Wulf Guenther, Detlef Otte, Joerg Petzold
  • Coil component
    Patent number: 7859377
    Abstract: A coil component is provided, and the coil component for an inductor is deformable dependent on flex of a flexible printed board due to elapse of time when mounted thereon, and has high resistance against dropping impact and has an inductance value. The coil component includes an anisotropic compound magnetic sheet which is layered on at least any one or both of the upper surface and the lower surface of an air core coil formed spirally in a plane and which is composed of flat or needle-shaped soft magnetic metal powder, which has a major axis and a minor axis and is dispersed in a resin material, the major axis of which corresponds to an in-plane direction of the air core coil.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: December 28, 2010
    Assignee: Sumida Corporation
    Inventor: Mitsugu Kawarai
  • Transformer core and its manufacturing method
    Patent number: 7859379
    Abstract: It is possible to provide a transformer core which can be mounted on a coil having both ends connected to a substrate or the like and can simplify the step for arranging an adhesive layer and suppress fluctuation of a magnetic gap. The transformer core (1) includes: a rectangular spacer (5, 20) having a region where a first convex portion (10, 21) is formed on the four sides of one of the surfaces as a unitary block and the first convex portion is not provided at least at a part of a pair of two opposing sides; and a sheet-shaped adhesive layer (6) bonded to a region where at least the first convex portion is not provided on the one of the surfaces of the spacer and connecting a soft ferrite core (4) to the spacer.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: December 28, 2010
    Assignee: Hitachi Metals, Ltd.
    Inventor: Masayasu Uemura
  • Splitter
    Patent number: 7839249
    Abstract: The present invention provides a splitter including a seat, a first inner core, a second inner core, a first coil, an outer core and a second coil. The seat has a bobbin, and the first coil is wound on the bobbin. The first inner core and the second inner core, disposed on the bobbin, are assembled with each other to cover the bobbin. The outer core and the first inner core are assembled with each other. The second coil is disposed between the outer core and the first inner core.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: November 23, 2010
    Assignee: Delta Electronics, Inc.
    Inventors: Hung-Chieh Tseng, Ying-Chian Kang, Tsung-Hsien Lee, Shu-Hui Chen, Hua-Sheng Shih
  • Composite transformer and power converter using same
    Patent number: 7839255
    Abstract: A composite transformer, having first and second inductors and a transformer, includes a transformer core that has a core leg around which portions of first and second windings are wound, and a base fixing the core leg, a first inductor core that has a core leg around which a portion of the first winding is wound and a base fixing the core leg, and a second inductor core that has a core leg around which a portion of the second winding is wound and a base fixing the core leg. The first and second windings are wound in a manner that flux are cancelled with each other, and are wound around the core leg of the transformer core in a manner alternately overlapping with each other, and are wound around respective core legs of the first and second inductor cores so as to be apart from each other to suppress any interference of magnetic fluxes.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: November 23, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masao Nagano, Mitsuaki Hirakawa
  • Magnetic core for current transformer, current transformer, and watt-hour meter
    Patent number: 7837807
    Abstract: A magnetic core for a current transformer, and a current transformer and a watt hour meter used thereof, which is preferred the detection of a alternate current with a large asymmetrical waveform and a alternate current which a direct current is superimposed are realized. A magnetic core for a current transformer comprising the composition represented by the general formula: Fe100-x-a-y-cMxCuaM?yX?c (atomic %), wherein M is at least one element selected from Co and Ni, M? is at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, X? is at least one element selected from Si and B, and x, a, y, and c meets the composition of 3?x?50, 0.1?a?3, 1?y?10, 2?c?30, and also 7?y+c?30, and an alloy comprising a crystal grain consisting of at least a part or all of the composition with a mean particle size of less than or equal to 50 nm.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: November 23, 2010
    Assignee: Hitachi Metals, Ltd.
    Inventor: Yoshihito Yoshizawa
  • Transformer
    Patent number: 7830237
    Abstract: A transformer includes an iron core having a shaft around which a plurality of coil modules is mounted. Each coil module includes spiral, upper and lower coil sections each having an outer loop and a plurality of inner loops received in and coplanar with the outer loop. The inner loops of the spiral upper coil section and the inner loops of the spiral lower coil section include a common innermost loop through which the shaft extends. Upper and lower ends of each coil module are respectively interconnected to the outer loops of the upper and lower coil sections. The spiral upper section is superimposed on the spiral lower section to form a two-layer structure. The lower end of an upper one of two adjacent coil modules interconnected to the upper end of a lower one of the two adjacent coil modules.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: November 9, 2010
    Assignee: Intelextron Inc.
    Inventor: Hsien-Chih Chen
  • Measurement transmitter
    Patent number: 7825761
    Abstract: The invention relates to a measurement transmitter for operation in a process plant. The enclosure of the measurement transmitter comprises two mutually separate containers (11, 12), where the transducer for converting the process-related, physical variable into an appropriate electrical variable is housed in the one container (11), and an electronic circuit (22) is arranged in the other container (12). The two containers (11, 12) have complimentary screw threads (51, 52) to each other, and are screwed together directly. The screw connection of the two containers (11, 12) comprises a transformer made up of two parts (31, 32), whose parts (31, 32) each comprise a winding (41, 42) connected to the circuitry (21, 22) of the respective container (11, 12).
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: November 2, 2010
    Assignee: ABB AG
    Inventors: Wolfgang Scholz, Frank Marks