Laminated Patents (Class 29/609)
  • Patent number: 10177636
    Abstract: A method of manufacturing a laminated core includes inserting permanent magnets 14 into magnet insertion holes 12, 12a of a core body 13; injecting a resin 18 into the holes 12, 12a from resin reservoir pots 17 in the die 15 (16) to fix the magnets 14; placing a dummy plate 19 between the die 15 having the pots 17 and the body 13, the plate 19 having gate holes 35, 35a guiding the resin 18 from the pots 17 into the holes 12, 12a, the hole 35 (35a) overlapping with both of a part of the hole 12 (12a) and a surface of the body 13; poring the resin 18 via the holes 35, 35a and curing the resin 18 in the holes 12, 12a; and separating the plate 19 from the body 13 to remove the resin 18 overflowed from the holes 12, 12a.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: January 8, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Yuichi Hirayama, Kento Aono, Naoki Isomura
  • Patent number: 10050496
    Abstract: An induced draft fan, including: a housing, a wind wheel, an AC motor, and a controller. The controller includes: an AC-DC conversion circuit, a microprocessor, a Hall sensor, a drive circuit, and a relay. The input end of the AC-DC conversion circuit is connected to an external AC input, and the output end of the AC-DC conversion circuit supplies a DC current to each circuit part. The input end of the relay is connected to the external AC input, and the output end of the relay supplies power for corresponding parts. A magnetic ring is disposed on a rotating shaft of the AC motor. The Hall sensor is disposed close to the magnetic ring for detecting a signal of a rotational speed of the AC motor and inputting the signal of the rotational speed into the microprocessor. The microprocessor controls energization or deenergization of the relay.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: August 14, 2018
    Inventors: Wei Lei, Wenqing Bian
  • Patent number: 9880026
    Abstract: A magnetic field sensor for detecting motion of an object includes a magnet configured to generate a magnetic field and having a first surface adjacent to the object and a second surface distal from the object. The first surface of the magnet has a centerline axis substantially parallel to and disposed on the first surface, and the centerline axis is diagonal with respect to a motion axis substantially parallel to and disposed on the first surface and parallel to which the object moves. The magnetic field sensor also includes a semiconductor substrate disposed between the magnet and the object, the semiconductor substrate supporting a plurality of spaced magnetoresistance elements disposed along a sensing element axis substantially parallel to the centerline axis of the magnet and configured to generate a respective plurality of magnetic field signals in response to the motion of the object with respect to magnetic field.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: January 30, 2018
    Assignee: Allegro MicroSystems, LLC
    Inventors: Jeffrey Eagen, Paul A. David, William P. Taylor
  • Patent number: 9876399
    Abstract: The invention concerns a stator for an electric machine, comprising a plate stack comprising a plurality of superposed stator plates, the plate stack being delimited at the ends by cover plates and an insulating plate being disposed on at least one cover plate in the plate stack, the insulating plate interlocking with the adjacent cover plate.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: January 23, 2018
    Assignee: Robert Bosch GmbH
    Inventor: Christian Aumann
  • Patent number: 9866092
    Abstract: A method of forming a rotor includes inserting a conductor bar into a slot defined by a lamination stack to define a gap between the conductor bar and the lamination stack. The method further includes, after inserting, swelling the conductor bar within the slot to fill the gap and form the rotor. A rotor is also disclosed.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: January 9, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael D. Hanna, James G. Schroth, John S. Agapiou, John C. Morgante
  • Patent number: 9866079
    Abstract: An electric motor includes a rotor and a wound stator structure. The stator structure includes a housing, a laminated stator core and windings wound around the stator core. The laminations of the stator core have an annular body and a plurality of teeth extending radially inwardly from the annular body. Projections and recesses are formed at the outer edge of the annular body. When assembled, the recesses of one lamination are aligned with the projections of an adjacent lamination such that when fitting the stator into the housing the projections may be deformed into an axially adjacent recess by contact with the housing. Thus the stator core contacts the housing at discrete locations.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: January 9, 2018
    Assignee: Johnson Electric S.A.
    Inventors: Yong Bin Li, Long Shun Jiang, Xian Chun Fan, Ping Wang
  • Patent number: 9824818
    Abstract: In a single phase transformer core and transformer, thin-strip metal is wound into multiple rings of different widths and arranged to define a ring-like structure having a stepped, substantially circular cross-section without any cuts or gaps in the magnetic path, or the core is wound from a tapered strip that is configured to define a substantially circular cross-section when wound, while in a three phase transformer core and transformer two inner frames, each made of one or more wound rings are arranged side-by-side and an outer frame of one or more rings is wound around the two inner frames, the core being covered with epoxy prior to winding coils on it.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: November 21, 2017
    Inventor: Keith D Earhart
  • Patent number: 9676053
    Abstract: A welding system includes an inductor on an output of a welding power supply. The power supply may be of the type including an engine and a generator for producing power, with power conversion circuitry conditioning the power to a form suitable for a stick welding application. The inductor has an inductance sufficient for storing energy for maintaining a welding arc with XX10 electrodes, such as on the order of 700 mH. The inductor may have a particular structure, such as one designed around T and L shaped core elements.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: June 13, 2017
    Inventor: Randall J. DuVal
  • Patent number: 9479034
    Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: October 25, 2016
    Assignee: L.H. Carbide Corporation
    Inventors: Thomas Neuenschwander, Barry A. Lee, Trevor Hirst
  • Patent number: 9336940
    Abstract: There is provided a laminated inductor including: a body having a plurality of sheets laminated in a width direction, and having first and second main surfaces in a thickness direction, third and fourth end surfaces in a length direction, and fifth and sixth side surfaces in the width direction; a first connection electrode formed on the first main surface of the body; first and second terminal electrodes formed on the second main surface of the body to be spaced apart from one another; a plurality of first internal conductive patterns connecting the first connection electrode and the first terminal electrode; and at least one or more second internal conductive patterns connecting the first connection electrode and the second terminal electrode.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: May 10, 2016
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Heung Kil Park, Min Cheol Park
  • Patent number: 9299488
    Abstract: A magnetic device includes an electrically insulating body and a conductor coil. The insulating body defines an internal cavity for a magnetic device core and a coolant channel routed about the internal cavity. The conductor coil extends through the insulating body and winds about the internal cavity. The electrically insulating body electrically insulates the internal cavity and coolant channel from the conductor coil.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: March 29, 2016
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Charles Shepard, Eric Karlen
  • Patent number: 9251939
    Abstract: An iron core is configured as a winding iron core block group that is obtained in such a manner that winding iron core blocks having rectangular cross-sections each of which is obtained by laminating magnetic metal ribbons with a predetermined width and which have plural widths and laminated thicknesses are arranged in the width direction of the magnetic metal ribbons. The laminated thickness of the winding iron core block located in the middle of the width direction of the magnetic metal ribbons is larger, and the cross-section of each iron core leg is configured substantially in a circular shape by centering the winding iron core blocks in the laminated direction of the magnetic metal ribbons. Upper and lower yokes are arranged in such a manner that the bottom faces of the winding iron core blocks are aligned, and an in-window support member supports the upper yoke on a plane.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: February 2, 2016
    Assignee: HITACHI, LTD.
    Inventors: Naoya Miyamoto, Satoshi Ichimura, Naoyuki Kurita
  • Patent number: 9196417
    Abstract: Several new and useful features for a magnetic structure are provided. One feature is that the magnetic structures are configured to help minimize the winding's AC losses, improving the system's efficiency. Another feature is that the combination of different magnetic hats creates a shaping path for the magnetic field. Still another feature is that a magnetic hat concept can be applied to a variety of magnetic core shapes.
    Type: Grant
    Filed: May 5, 2013
    Date of Patent: November 24, 2015
    Assignee: DET International Holding Limited
    Inventors: Ionel Jitaru, Marco Antonio Davila, Andrei Savu, Andrei Ion Radulescu
  • Publication number: 20150123757
    Abstract: A chip electronic component may include an insulating layer formed on a lower portion of a side surface of an internal coil pattern to avoid a direct contact between the internal coil pattern and a magnetic material, thereby preventing a waveform distortion indicating a reduction in inductance at high frequency.
    Type: Application
    Filed: April 22, 2014
    Publication date: May 7, 2015
    Inventor: Min Sung CHOI
  • Patent number: 8997333
    Abstract: A method of manufacturing an inductor includes a lamination step, a division step, a firing step, and a plating step. In the lamination step, a laminate including an insulator, a coil body, and external electrodes is formed. That is, in the lamination step, insulating layers having wide filling conductors, insulating layers having narrow filling conductors, and conductor patterns having external electrode patterns are laminated. As a result, the conductor patterns form the coil body, and the wide filling conductors, the narrow filling conductors, and the external electrode patterns form the external electrodes. The narrow filling conductors have a width that is less than the widths of the wide filling conductors and the external electrode patterns, and recesses and projections are provided in the external electrodes.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: April 7, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kazuhiko Yamano
  • Patent number: 8943677
    Abstract: A method for joining core laminations by adhesive force to form a soft-magnetic laminated core by applying a coating that is wettable with epoxy resin to top sides and undersides of each sheet. The sheets are separated into core laminations made of soft-magnetic sheets, which are stacked to form a core lamination stack, and a cured adhesive introduced in a state of low viscosity into interstices between the core laminations. The core lamination stack has intermediate layers between the core laminations. For this purpose, the core laminations comprise a final-annealed, crystalline CoFe alloy, an adhesive-wettable top side and an adhesive-wettable underside. Together with the intermediate layers, the core laminations form a dimensionally accurate laminated core. The laminated core has a substantially adhesive-free contour consisting of contour surfaces of the core laminations. The adhesive is solvent-free in its low-viscosity state.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: February 3, 2015
    Assignee: Vacuumschmelze GmbH & Co. KB
    Inventors: Joachim Gerster, Witold Pieper, Harald Staubach, Dominik Fackelmann
  • Patent number: 8935845
    Abstract: A method for manufacturing an inner rotor for a rotary electric machine, the rotor comprising a plurality of pole pieces surrounding a shaft, each pole piece being made from a stack of metal sheets (3) made of magnetic material, the pole pieces delimiting recesses between them for permanent magnets. The method comprises, in succession the steps of cutting blanks (33) each grouping together n metal sheets (3), ā€œnā€ being the number of poles of the rotor, the n metal sheets of a blank being held together by temporary bridges (35) straddling the recesses, at least two bridges each comprising an outer lug (36), stacking the blanks while keeping them aligned via the outer lugs, immobilizing the stack of blanks, and eliminating all the temporary bridges in order to free up the radial access to the recesses.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: January 20, 2015
    Assignees: Compagnie Generale des Etablissements Michelin, Michelin Recherche et Technique S.A.
    Inventors: Maeick Blanc, Bertrand Vedy
  • Publication number: 20140373341
    Abstract: A method for manufacturing a laminated coil component having: a step of placing a first green sheet having pairs of bordering first and second areas; a step of placing a second green sheet having pairs of bordering third and fourth areas; and a step of staggering another second green sheet on the second green sheet. The first, second, third and fourth areas have identical rectangular shapes and have a first, second, third and fourth conductor, respectively. The third and fourth linear conductors form a loop. An end of the first linear conductor is connected to a first side of the first area. A part of the first linear conductor closest to a second side adjacent to the first side has a line width smaller than a part of the third linear conductor or a part of the fourth linear conductor overlapping with the part of the first linear conductor.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 25, 2014
    Inventors: Kouji YAMAUCHI, Mitsuru ODAHARA
  • Patent number: 8912702
    Abstract: A process and a blanking mold are described for the production of a ferromagnetic core for electric motors formed by a plurality of segments. The laminations are blanked from a sheet of ferromagnetic material and stacked in an accumulation chamber of the blanking mold, along which they advance until a segment constituted by a stack having a preset number of laminations is formed, which is mechanically connected to an adjacent segment, thereby forming a rectilinear sequence of segments. The segments are hinged to each other with the possibility of mutual rotation to allow the sequence of segments to be brought from the rectilinear condition to a closed circular configuration.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: December 16, 2014
    Assignee: Ernesto Malvestiti S.p.A.
    Inventor: Sergio Confalonieri
  • Patent number: 8898886
    Abstract: A method for producing a laminated ceramic electronic component includes the steps of preparing ceramic green sheets, transferring an inner conductor pattern layer and a lead conductor pattern layer formed on a support on the ceramic green sheets to form the inner conductor and the lead conductor on the ceramic green sheets, laminating the ceramic green sheets to cover the inner conductor and the lead conductor, and firing the ceramic laminated product. In the step of forming the inner conductor and the lead conductor, the inner conductor pattern layer is transferred onto the ceramic green sheet a plurality of times so as to overlap each other, thereby forming the inner conductor, and the lead conductor pattern layer is transferred onto the ceramic green sheet, wherein the number of times of the transferring is less than the number of times of the transferring of the inner conductor pattern layer.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: December 2, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tsuyoshi Tatsukawa, Keisuke Takayama
  • Publication number: 20140331483
    Abstract: A one-piece field-pole magnet is manufactured by filling a gap formed between magnetic pieces placed on a plane with an adhesive or resin. During the process, a pushing member applies a pushing force onto each of the magnet pieces in a thickness direction thereof. The pushing member comprises pushing parts each of which pushes each of the magnet pieces, thereby equalizing the pushing forces applied to the respective magnet pieces.
    Type: Application
    Filed: December 14, 2012
    Publication date: November 13, 2014
    Inventors: Kazuhiro Takaichi, Kimio Nishimura, Hideki Watababe, Takashi Sekikawa, Yasushi Matsushita, Akihisa Hori, Takumi Ohshima, Michito Kishi, Kunitomo Ishiguro, Yasuhisa Koike
  • Patent number: 8875381
    Abstract: A coil strand is wound on an insulator to produce a divided core member, and then the divided core member is placed on a table. While the table rotates about its axis, ends of the coil strands are inserted into lead end holding grooves, which are defined in a surface of the insulator on an outer circumferential edge of a stator and which extend along a circumferential direction of the stator.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: November 4, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Satoru Uchiumi, Hiroki Tahira, Kohei Fujinoto, Yasuto Ohashi
  • Patent number: 8878415
    Abstract: Permanent magnet synchronous machines (100) are described having good efficiency, as well as corresponding methods for making a stator (110) or stator teeth (114) for such machines. A method for fabricating a stator (110) for an axial flux permanent magnet synchronous machine is for example described comprising obtaining several sets of substantially identical laminates (302), and stacking the sets of substantially identical laminates (302) so that a subsequent laminate has a part overlapping (304) the previous laminate and a part not overlapping (306) the previous laminate. Alternatively, a method of manufacturing a stator (110) is described wherein the method comprises obtaining a set of laminates (302) connected to each other with a thin strip (402) of material and creating a stack by folding the laminates (302) along the thin strip (402) of material.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: November 4, 2014
    Assignee: Universiteit Gent
    Inventors: Alex Van Den Bossche, Peter Sergeant
  • Publication number: 20140317908
    Abstract: A method for manufacturing a laminated iron core by press punching a thin strip material to manufacture a motor core, comprising, before punching out a scrap 10 of an iron core piece 11 for the motor core, forming a plurality of partition holes 15 in the scrap 10 to divide the scrap 10 into areas 20, each of the partition holes 15 being connected at one end thereof with a peripheral portion 14 of the scrap 10 through a first connecting portion 17. The method further comprises forming a central hole 12, which is connected with the partition holes 15 through second connecting portions 18, at a central portion of the scrap 10. Accordingly, provided are the method for manufacturing a laminated iron core without causing scrap pulling when punching out and laminating the thin iron core pieces 11 and the shape of the scraps formed thereby.
    Type: Application
    Filed: November 13, 2012
    Publication date: October 30, 2014
    Applicant: MITSUI HIGH-TEC INC.
    Inventors: Kazuhiko Umeda, Masahiro Izumi
  • Patent number: 8732939
    Abstract: An electronic component capable of preventing the occurrence of magnetic saturation due to a magnetic flux surrounding each coil conductor and a method of manufacturing the electronic component are provided. The electronic component includes a laminate formed by stacking unit layers, where each unit layer includes a first insulating layer, and a coil conductor and second insulating layer formed on the first insulating layer. Each second insulating layer has a Ni content greater than a Ni content of each first insulating layer. Portions of the first insulating layers have a Ni content lower than a Ni content of the second portions after the laminate is calcined.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: May 27, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kiyoshi Iwai
  • Publication number: 20140139307
    Abstract: A magnetic substrate has such a shape that ridges extending between principal surfaces are cut away by cutout portions. A multilayer body has corners arranged so as to overlap the cutout portions. A coil includes lead portions which are connected with both ends of a coil portion and which are drawn out to the corners. A coil is combined with the coil to constitute a common mode choke coil and includes lead portions which are connected with both ends of a coil portion and which are drawn out to the corners. Connecting portions connect external electrodes to the lead portions and are provided at the cutout portion.
    Type: Application
    Filed: January 23, 2014
    Publication date: May 22, 2014
    Inventors: Tomohiro KIDO, Miho KITAMURA, Tetsuzo HARA, Nobuhiro ISHIDA
  • Publication number: 20140097923
    Abstract: A laminated coil component includes a magnetic body part made of a ferrite material and a coil conductor wound into a coil shape and embedded in the magnetic body part to form a component base. The component base is divided into a first region near the coil conductor and a second region other than the first region. The grain size ratio of the average crystal grain size of the magnetic body part in the first region to the average crystal grain size of the magnetic body part in the second region is 0.9 or less. The molar content of CuO in the ferrite raw material is set to 0.2 to 4 mol %. In a method laminated coil component, the coil is formed from a conductive paste including Ag, and firing the laminated body is performed by setting the oxygen concentration is 0.1 volume % or less as a firing atmosphere.
    Type: Application
    Filed: December 12, 2013
    Publication date: April 10, 2014
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Osamu NAITO, Hiroki KOWADA, Atsushi YAMAMOTO
  • Patent number: 8683675
    Abstract: Provided is a method for fabricating a molded stator of a rotary electric machine, the method comprising: a lamination step of laminating a plurality of core sheets each having a plurality of core pieces connected to one joining portion via bridge portions, thereby forming a divided-laminated-core group structure; a winding step of winding a coil on a teeth portion of each divided laminated core of the divided-laminated-core group structure; a cutting step of cutting the bridge portions, thereby separating the divided laminated cores wound with the coils; a temporary fixing step of temporarily fixing the divided laminated cores circularly arranged to form a stator; and a molding step of placing, in a mold, the stator into which a mold mandrel is inserted along the inner circumferential surface, and molding an outer circumferential surface of the stator with resin.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: April 1, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Yuya, Nobuaki Miyake, Yuji Nakahara, Haruyuki Hasegawa, Takenori Aomi, Fumiaki Tsuchiya, Ryoko Komaki
  • Patent number: 8661651
    Abstract: The rotary electric machine includes a rotor, and a stator including an stator core that is formed by laminating and integrating magnetic steel plates, and concentrated winding coils that are mounted to respective teeth, the stator being disposed so as to surround the rotor. Bobbins each including a trunk portion and first and second guide portions that are disposed so as to protrude from two longitudinal ends of an upper surface of the trunk portion are disposed so as to place bottom surfaces of the trunk portions alongside two axial end surfaces of the teeth. The concentrated winding coils are configured by winding a conductor wire a predetermined number of times around the teeth so as to pass through a concave space that is formed by the trunk portions and the first and second guide portions at two axial ends of the teeth.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: March 4, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hironori Tsuiki, Yukinobu Karata, Shinichiro Yoshida, Hiroyuki Akita, Masaya Inoue
  • Publication number: 20140047704
    Abstract: The present invention relates to a multilayered chip power inductor with high direct current superposition characteristics and high-frequency characteristics, particularly to a multilayered chip power inductor using as magnetic materials a magnetic sheet filled up with soft magnetic metal powder and a magnetic core. The present invention is to provide a multilayered chip power inductor achieving high inductance and direct current superposition characteristics.
    Type: Application
    Filed: February 8, 2013
    Publication date: February 20, 2014
    Inventor: Chang Sung Corporation
  • Publication number: 20140028431
    Abstract: Provided are an amorphous metal core that can minimize a core loss in which amorphous thin plate laminates are mutually combined by coupling protrusions and coupling recesses of assembly plates, an induction device, and a method of making the amorphous metal core. The amorphous metal core includes: a number of amorphous metal unit cores that include an amorphous thin plate laminate and a pair of assembly plates that are respectively laminated on the front and rear surfaces of the amorphous thin plate laminate, and are configured to have an I shape, respectively. The induction device includes: an amorphous metal core including a number of amorphous metal unit cores that are formed of an ā€œIā€ shape, respectively; and at least one coil that is wound on at least one of the amorphous metal unit cores forming the amorphous metal core.
    Type: Application
    Filed: April 9, 2012
    Publication date: January 30, 2014
    Applicant: AMOGREENTECH CO., LTD.
    Inventors: Chun Geol Lee, Dong Wook Jang
  • Patent number: 8631728
    Abstract: A method for manufacturing a radial centering surface on an outer circumference of an annular laminated core of a stator comprises the steps of forming a stator with a hollow cylinder from strip-shaped laminations, preloading the stator axially before and during cutting, creating centering surfaces on an outer circumferential of the stator by using at least two cutting tools.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: January 21, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Eberhard Rau, Thomas Berger, Martin Henne, Klaus Pflueger, Rob Berry
  • Patent number: 8539665
    Abstract: A method of manufacturing a rotor for an electric motor that includes producing a generally flat metal strip, bending one section of the strip relative to another section, and rolling the strip to form a cup-shaped shell.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: September 24, 2013
    Assignee: Whirlpool Corporation
    Inventors: Luiz V. Dokonal, Claudio W. Lima, Orlando Starke, Rodrigo S. Teixeira
  • Patent number: 8533933
    Abstract: A method for manufacturing and preparing for assembly a stator core of a generator, the stator core having a central cylindrical bore along a longitudinal axis of the stator core, the method including in a first step, mounting a first press plate onto a tooling device and concomitantly and/or subsequently positioning at least one key bar to be manufactured in an axial direction with respect to the longitudinal axis in a spaced manner along a peripheral circumference of the first press plate. The method includes in a second step, stacking a plurality of generator laminations onto the first press plate and mechanically coupling the plurality of generator laminations with the at least one key bar and, in a third step, mounting a second press plate onto the plurality of generator laminations, fixing the second press plate to at least one of the at least one key bar and at least one axial fixing device and concomitantly and/or subsequently exerting axial stress on the first and the second press plates.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: September 17, 2013
    Assignee: Alstom Technology Ltd
    Inventor: Michel Verrier
  • Patent number: 8528191
    Abstract: Provided is a U-shaped iron core transfer/assembling method, by which a first leg iron core, a second-leg iron core and a lower-yoke iron core are housed in a first leg iron core tank, a second leg iron core tank and a lower-yoke iron core tank, respectively, and those iron cores are individually transported in sideways attitude. Next, the lower-yoke iron core is transferred into a lower-yoke iron core assembling tank. While the first leg iron core, the second leg iron core and the lower-yoke iron core being kept in the tilted postures, the first leg iron core tank, the second leg iron core tank and the lower-yoke iron core assembling tank are individually opened at their openings and are jointed to each other.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: September 10, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaki Sugihara, Keigo Shibata, Shin Yamada
  • Patent number: 8516682
    Abstract: A manufacturing method of a stator core of a rotating electrical machine includes a finishing process that simultaneously moves a coining punch divided in a circumferential direction and arranged around a helically stacked core to a center side in a radial direction and presses an outer surface of a core-back part of the helically stacked core while pressing an end side of the helically stacked core in an axial direction by a holding device.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: August 27, 2013
    Assignee: Denso Corporation
    Inventor: Ryoutarou Kojima
  • Patent number: 8484829
    Abstract: Methods of manufacturing low profile magnetic components configured as a power management devices for an electrical system of an electronic device involve prefabricated coil windings assembled with a plurality of flexible dielectric sheet layers, and laminating the plurality of flexible dielectric sheets around the prefabricated coil windings to form a dielectric body having a low profile chip configuration attachable to the electronic device.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: July 16, 2013
    Assignee: Cooper Technologies Company
    Inventors: Daniel Minas Manoukian, Robert James Bogert
  • Patent number: 8474129
    Abstract: Lamination packs of a controlled height are produced in that laminations are punched with a tool and glue is applied partially onto at least one of an upper surface and a lower surface of each of the laminations without the application device that applies the glue contacting the laminations. Several of the laminations are then assembled to a lamination pack. Height of the lamination packs is controlled by interrupting the application of glue for certain laminations so that between some of the laminations that are stacked for assembling a lamination pack there is no glue.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: July 2, 2013
    Assignee: Kienle + Spiess Stanz- und Druckgiesswerk GmbH
    Inventors: Daniel Blocher, Steffen Bauer
  • Patent number: 8450830
    Abstract: A plurality of sequential electro-deposition, planarization and insulator deposition steps are performed over a patterned thick photoresist film to form a laminated ferromagnetic alloy core for micro-fabricated inductors and transformers. The use of a plurality of contiguous thin laminations within deep patterns on non-removable photoresist film provides sufficient volume of magnetic film in, for example, high frequency applications, and reduces eddy current loss at high frequency.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: May 28, 2013
    Assignee: National Semiconductor Corporation
    Inventors: Peter J. Hopper, William French, Andrei Papou, Dok Won Lee
  • Patent number: 8427272
    Abstract: An amorphous alloy-based magnetic core with reduced audible noise and a method of making the amorphous alloy-based magnetic core emanating low audible noise, including: placing the core with multiple layers of high strength tape on the core legs, wherein the tapes have a high tensile strength, high dielectric strength and high service temperature, resulting in reduced level of audible noise. When operated under optimum condition, the reduced level of audible noise is 6-10 dB less when compared with a same-size core that has been coated with resin instead.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: April 23, 2013
    Assignee: Metglas, Inc.
    Inventors: Mark Robert Columbus, Robert Brown, Kengo Takahashi, Ryusuke Hasegawa
  • Patent number: 8421293
    Abstract: Improvement of torque densities, miniaturization and weight saving for outer rotor type motors or permanent-magnet-field-type DC motors can be efficiently achieved by high-energy densification of a magnet. However, torque pulsation or armature reaction gives negative influences thereto. Further, in application of a slotless (coreless) structure eliminating the torque pulsation or the armature reaction, the magnetic resistance of motor magnetic circuits will be enhanced. For solving the above problems, there is provided an annular magnet that is opened in a reverse direction relative to the opening direction of a U-shaped segment fabricated in constantly-directed magnetic fields, the annular magnet having an anisotropic distribution where angles relative to inner peripheral tangent lines can be continuously changed in the range of approximately 0 to 90 degrees, and having energy density (BH)max of 160 to 186 kJ/m3.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: April 16, 2013
    Assignee: Minebea Co., Ltd.
    Inventor: Fumitoshi Yamashita
  • Patent number: 8402636
    Abstract: A manufacturing method of ground-buried-type solid insulation transformer includes producing a coil form into which an inner window is formed; winding a low voltage coil and a high voltage coil on the coil form to produce a first coil part; winding glass fiber on the first coil part to produce a second coil part and assembling a first mold into the inner window and then pre-heating the second coil part; putting the second coil part into a second mold and injecting epoxy resin and hardener between the second coil part and the second mold, and automatically molding and curing thereof under predetermined speed, vacuum, pressure and temperature to produce a third coil part on outer circumference of which an epoxy layer is formed; separating the first mold from the inner window of the third coil part and then after-treating and curing the third coil part; cooling the after-treated and cured third coil part and sanding and washing the epoxy layer, and applying semi-conductive coating material to the sanded part to
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: March 26, 2013
    Assignee: Cheryong Industrial Co., Ltd.
    Inventors: Jong Tae Park, Byung Kwon Song, Kee Ha Hwang, Tae Ho Kim, Ki Hak Yi
  • Patent number: 8397369
    Abstract: Numerous arrangements for permanent magnets are disclosed that can focus the flux produced by the magnets. Depending on the particular application in which the disclosed designs and techniques are used, efficiency and reliability may be increased by minimizing flux leakage, increasing peak flux density, and shaping the flux fields to improve the effective coercivity of the flux focusing permanent magnet arrangement when loaded, and to achieve customized voltage and current waveforms. The disclosed magnet assemblies may be incorporated into a machine, such as a motor/generator, having windings and may be disposed for movement relative to the windings. The magnet assembly may be mounted on a support formed of one or more ferromagnetic materials, such as a back iron. The disclosed flux focusing magnet assemblies may be formed using a variety of manufacturing methods.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: March 19, 2013
    Assignee: Boulder Wind Power, Inc.
    Inventors: James S. Smith, Robert Pillsbury, Brian Sullivan
  • Patent number: 8375569
    Abstract: An apparatus for manufacturing a transformer core includes a drawing which draws magnetic sheet materials in parallel from winding bodies. A cutter cuts the sheet materials at predetermined positions substantially simultaneously to form sheets each with a different length. An overlapping unit forms a block-shaped laminate by laminating the cut magnetic sheet materials in length and forms a resultant laminate by laminating the formed block-shaped laminates. An annulation unit forms an annular structure of the resultant laminate so that the longer block-shaped laminate forms the outer annular portion and the shorter block-shaped laminate forms the inner annular portion. Both ends of the magnetic sheet materials are abutted or overlapped to locate the abutted or overlapped portions at annularly different positions between adjoining layers of the magnetic sheet materials. A control unit controls the drawing unit, cutter and overlapping unit.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: February 19, 2013
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kazuyuki Fukui, Kenji Nakanoue, Takashi Kurata, Hisashi Koyama, Hidemasa Yamaguchi, Chikara Mizusawa
  • Patent number: 8371021
    Abstract: A process of manufacturing segments, an anisotropic direction of which is continuously changed in a plane vertically by a uniform magnetic field maintained in a constant direction and a process of arranging a plurality of segments on a circumference, extruding the segments in a ring shape by rheology based on the viscous deformation of the segments, from one thrust-direction end surface of the segments, and subsequently compressing the segments from both thrust-direction end surfaces of the segments are necessarily included. A ring magnet, anisotropy of which is controlled in a continuous direction, is provided, and a source for generating a static magnetic field has energy density (BH) max?160 to 180 kJ/m3.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: February 12, 2013
    Assignee: Panasonic Corporation
    Inventors: Fumitoshi Yamashita, Kiyomi Kawamura, Yukihiro Okada, Hiroshi Murakami
  • Publication number: 20130009740
    Abstract: A common mode filter having heterogeneous laminates includes a first magnetic layer, a nonmagnetic insulating substrate, a second magnetic layer, a first coil layer, and a second coil layer. The second magnetic layer is formed on the nonmagnetic insulating substrate, between the nonmagnetic insulating substrate and the first magnetic layer. The first coil layer is disposed between the first magnetic layer and the second magnetic layer, and includes a first coil. The second coil layer is disposed between the first magnetic layer and the second magnetic layer, and includes a second coil. The first and second coil layers are separated from each other, and the first and second coils are magnetically coupled to each other.
    Type: Application
    Filed: March 26, 2012
    Publication date: January 10, 2013
  • Publication number: 20120280781
    Abstract: A controlled seam magnetic core lamination utilizable in an inductor structure includes a magnetic base and first and second spaced-apart magnetic sidewalls extending substantially orthogonally from the base to define a seam therebetween.
    Type: Application
    Filed: May 2, 2011
    Publication date: November 8, 2012
    Inventors: Peter Smeys, Andrei Papou, Peter Johnson, Anuraag Mohan
  • Patent number: 8291573
    Abstract: A stator has conductor segments serially wound on a core. Each segment inserted in one of slots of the core has a slanting portion protruding from the slot and inclined toward circumferential and axial directions of the core. Each slanting portion has an oblique portion with a film removal surface and a film removal portion with a film removed surface to have a slanting removal area covered with no insulation film and extending on the oblique portion. Each film removal portion has a connection portion on an end thereof. The connection portions are aligned along a radial direction of the core to form a plurality of end pairs. The connection portions of each end pair are connected with each other so as to serially connect the segments with one another.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: October 23, 2012
    Assignee: Denso Corporation
    Inventor: Takashi Tokizawa
  • Patent number: 8286331
    Abstract: A method for manufacturing a laminated core includes (1) blanking a rotor core sheet 15 and a stator core sheet 14 from a thin strip material 27 and (2) laminating the stator core sheet 14 inside a die. The stator core sheet 14 includes a ring-shaped yoke piece 18 and plural magnetic pole pieces 19 integrally connecting to a radially inside of the yoke piece 18. Each of the magnetic pole pieces 19 includes a magnetic pole shaft piece 20 and a magnetic pole tooth piece 21. The magnetic pole pieces 19 are formed by blanking preparatory slots 29; coining a part or a whole of the magnetic pole shaft pieces 20 to elongate the same in a radially inward direction; and thereafter, blanking the finishing slots 30 and shaping the magnetic pole tooth pieces 21.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: October 16, 2012
    Assignee: Mitsui High-Tec, Inc.
    Inventor: Akihiro Hashimoto
  • Patent number: 8276426
    Abstract: Laminations to be stacked as magnetic cores are produced from a very thin amorphous metal strip, using a punch press with accurate punch/die clearance. The laminations are collected on conveyor spindles or a transport rod or pipe, in either case being arranged without the need for substantial handling. Heat annealing and anti-vibration treatments can be applied along a conveying path. The laminations are grouped in a stack to define a core and are packaged or encapsulated in electrically nonconductive coverings. The finished core has advantageous electrical characteristics and low cost.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: October 2, 2012
    Assignee: Magnetic Metals Corporation
    Inventors: Rodica Musat, Frank A. Raneiro, Thomas H. Rooney, Jr.