With Vibration Control Patents (Class 336/100)
  • Patent number: 10840677
    Abstract: An electrical installation, in particular a transformer, phase shifter or inductor, which includes a fluid-filled tank having side walls, wherein, for protection against bombardment and/or fragmentation effects, the side walls are formed in a bullet-resistant manner and are made of a material having a traction strength of greater than 1000 MPa, or wherein a bullet-resistant reinforcement made of such a material is provided, the outer side of which envelope the side walls.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: November 17, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventor: Gerald Leber
  • Patent number: 10780764
    Abstract: An on-board fluid machine includes a housing configured to allow fluid to flow into the housing, an electric motor accommodated in the housing, and a driver that is supplied with DC power and drives the electric motor. The driver includes a low-pass filter circuit and an inverter circuit. The low-pass filter circuit includes a common mode choke coil and a capacitor. The driver further includes a damping unit located at a position where magnetic field lines produced by the common mode choke coil generate eddy current.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: September 22, 2020
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shunsuke Ambo, Fumihiro Kagawa, Yoshiki Nagata
  • Patent number: 10777349
    Abstract: A current transformer includes a pre-formed core forming a closed loop with a flexible axially wound secondary winding. A continuous length of wire is axially coiled around a flexible bobbin to form a secondary winding. The resulting secondary winding may be slid onto the closed loop of the pre-formed core. The flexibility of the axially wound secondary winding facilitates conformity to a non-linear shape of the pre-formed core.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: September 15, 2020
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Timothy M. Minteer, Eric M. Sawyer, David Kenny
  • Patent number: 10707008
    Abstract: An iron core includes a first iron core block and a second iron core block disposed so as to create a gap therebetween, and a non-magnetic fastener disposed in the gap. The fastener joins the first iron core block and the second iron core block to each other.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: July 7, 2020
    Assignee: FANUC CORPORATION
    Inventor: Masatomo Shirouzu
  • Patent number: 10629352
    Abstract: The invention relates to a traction transformer for railbound vehicles comprising: an insulating liquid filled enclosure, at least two windings contained in the enclosure, a transformer core, mounting means for mounting the transformer to the railbound vehicle, wherein the transformer core is arranged outside the enclosure, and wherein the mounting means are attached to the transformer core.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 21, 2020
    Assignee: ABB Schweiz AG
    Inventors: Philippe Stefanutti, Stephane Isler, Toufann Chaudhuri, Blaise Thorens, Luc Grosjean
  • Patent number: 10262785
    Abstract: A press-clamp for an electric transformer winding formed by an upper plate having a free inner face with a first concentric circular protrusion, and an outer face joined to a concentric nut that can be screwed along a threaded bolt; a clamping force sensor having a ring-shaped body; and a lower plate having a peripheral wall defining a cavity with a second concentric protrusion and housing the ring-shaped body of the clamping force sensor and the upper plate by its inner face, the ring-shaped body of the clamping force sensor placed concentrically when aligned with the first protrusion and the second protrusion.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: April 16, 2019
    Inventor: Gerardo Tam├ęz Torres
  • Patent number: 10170237
    Abstract: In various aspects, a plate-shaped leakage structure as an insert in a magnetic core of an inductive component, a magnetic core having a plate-shaped leakage structure, and an inductive component. In illustrative embodiments, a plate-shaped leakage structure is provided as an insert in a magnetic core, which is passed through, along the thickness direction thereof, by at least one spacer having a very low magnetic permeability (as opposed to the rest of the material of the leakage structure). In a magnetic core according to an aspect, core legs are arranged above opposite bearing surfaces of the plate-shaped leakage structure, the plate-shaped leakage structure providing a leakage path between the core legs.
    Type: Grant
    Filed: March 21, 2015
    Date of Patent: January 1, 2019
    Assignee: SUMIDA Components & Modules GmbH
    Inventors: Norbert Ginglseder, Martin Grubl
  • Patent number: 10115514
    Abstract: A three-phase high frequency transformer has: a ferrite core formed from three solid-cylindrical cores and a ceiling plate and a bottom plate; and three sets of coils having primary coils of a predetermined inner diameter that are formed by bending flat wires plural times in width directions of the flat wires, and secondary coils that are formed such that an inner diameter is the same as the inner diameter of the primary coils by bending flat wires, that have a width that is different than a width of the flat wires of the primary coils, in width directions of the flat wires, and the flat wires that structure the secondary coils are interposed within intervals of the flat wires that structure the primary coils, and the three sets of coils are structured such that inner peripheries of the primary coils and the secondary coils coincide, and are disposed such that the respective solid-cylindrical cores are inserted in respective inner portions, and the primary coils and the secondary coils are ?-connected or Y-co
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: October 30, 2018
    Assignee: Seiden Mfg. Co., Ltd.
    Inventor: Tsunehiko Honna
  • Patent number: 9905353
    Abstract: A low loss power inductor core and method for making same. The magnetic core includes an outer portion formed as a closed loop from multiple magnetic core pieces, and inner portion disposed within the closed loop. Non-magnetic spacers at opposing ends of the inner core portion position and secure the inner core portion between mutually opposed inner sides of the closed loop.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: February 27, 2018
    Assignee: HIQ SOLAR, INC.
    Inventor: Andre P. Willis
  • Patent number: 9646761
    Abstract: A power transmission transformer (1) includes a transformer body (11). Each of two upper pipings (3) is connected between the transformer body (11) and one of two heat dissipators (2, 21) outside of the transformer body (11). Each of two lower pipings (4) is connected between the transformer body (11) and one of the heat dissipators (2, 21). A sound absorbing device (6, 61) is mounted between and spaced from one of two sidewalls of the transformer body (11) and one of the heat dissipators (2, 21). The sound absorbing device (6, 61) is fixed to one of the upper pipings (3) and one of the lower pipings (4). An outer wallboard (63) and a sound absorbing material (64) are respectively mounted to two sides of at least one fixing frame (62) of the sound absorbing device (6, 61).
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: May 9, 2017
    Assignee: Fortune Electric Co., Ltd.
    Inventors: Chia-Ching Lin, Ching-Min Chen
  • Patent number: 9576724
    Abstract: An air core power reactor (10) having a noise mitigating sound shield (40). In one embodiment the sound shield includes a plurality of sound absorbing panels (42p) configured for positioning about an outermost reactor layer (12?) so that the panels reduce radiation of acoustic energy when the reactor coil layers carry current. One or more flexible members (48) are attached along the first side of each sound absorbing panel for contact with the outermost reactor layer. Sound barrier material (44) is positioned along the second side of each panel. When the flexible members are attached to a panel and the panel is installed about the outermost first layer of the reactor, the flexible members are positioned against the outermost first layer and the flexible members provide a gap between the first side of the panel and the outermost first layer of the reactor.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: February 21, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: Fabian Best, Tom Chiu Hung Lau
  • Patent number: 9437361
    Abstract: A three-phase high frequency transformer has: a ferrite core formed from three solid-cylindrical cores and a ceiling plate and a bottom plate; and three sets of coils having primary coils of a predetermined inner diameter that are formed by bending flat wires plural times in width directions of the flat wires, and secondary coils that are formed such that an inner diameter is the same as the inner diameter of the primary coils by bending flat wires, that have a width that is different than a width of the flat wires of the primary coils, in width directions of the flat wires, and the flat wires that structure the secondary coils are interposed within intervals of the flat wires that structure the primary coils, and the three sets of coils are structured such that inner peripheries of the primary coils and the secondary coils coincide, and are disposed such that the respective solid-cylindrical cores are inserted in respective inner portions, and the primary coils and the secondary coils are ?-connected or Y-co
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: September 6, 2016
    Assignee: Seiden Mfg. Co., Ltd.
    Inventor: Tsunehiko Honna
  • Patent number: 9093212
    Abstract: A core apparatus for a magnetic component includes first and second E-cores stacked with legs extending in the same direction. The first E-core includes a middle first core leg having a middle first core leg length, and the second E-core includes a middle second core leg having a middle second core leg length greater than the middle first core leg length such that a step is formed between the distal ends of the middle legs of the first and second E-cores. A third E-core may be positioned opposite the stacked first and second E-cores forming a stepped air gap between the middle first and second core legs and the middle third core leg.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: July 28, 2015
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Deborah Pinkerton, Donald Folker
  • Patent number: 8841982
    Abstract: High- or medium-voltage equipment comprising an induction-activated portion, a tank surrounding the active portion and filled with a dielectric fluid, such as oil, and passive acoustic reduction means for reducing acoustic waves coming from the active portion and propagating in the dielectric fluid. According to the invention, the passive means create an interference field that divides the propagated waves into two groups of waves of opposite phase that interfere with each other in a zone that is at a distance from the walls of the tank so as to at least limit the amplitude of the waves before they make contact with said walls. The equipment provides an effective solution for significantly reducing the noise that is propagated by the dielectric fluid medium.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: September 23, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: Francois Devaux, Pascal Vouagner
  • Patent number: 8499751
    Abstract: An ignition coil device according to the present invention is provided with a primary coil to which a primary current is applied; a secondary coil that is magnetically coupled with the primary coil and generates an ignition voltage when the primary current is cut off, so as to produce a spark discharge between a pair of electrodes of an ignition plug; a noise suppression element electrically connected between the secondary coil and one of the electrodes of the ignition plug; and a case made of an insulating material having a noise suppression element containing unit. The device is characterized by including ribs disposed in the noise suppression element containing unit and arranged in such a way as to face the outer circumferential surface of the noise suppression element and a resin insulating material that is filled into the containing unit and makes contact with the ribs and the noise suppression element.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: August 6, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Idogawa, Takeshi Shimizu
  • Patent number: 8339234
    Abstract: The invention relates to an inductance coil, in particular an inductance coil without an iron core for use in electric power grids, comprising at least two cylindrical winding layers (1), which are disposed concentrically with respect to a coil central axis (7) and are connected electrically in parallel. The inductance coil comprises at least one means for reducing or minimizing sound emissions produced during the operation of the inductance coil. At least the outermost winding layer (1) is designed in this case as a current-conducting, acoustic shield winding (18) opposite the winding layer (1) adjacent in the direction of the coil central axis (7), wherein the shield winding (18) is dimensioned electrically such that it is designed for the transmission of a current intensity, which is only a fraction of the current intensity, to be transmitted by the adjacent winding layer (1).
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: December 25, 2012
    Assignee: Coil Holding GmbH
    Inventors: Alexander Grisenti, Josef Eder, Johann Muelleder
  • Patent number: 8274354
    Abstract: The disclosure relates to a transformer having a yoke which has a crosspiece and at least two limbs, over which limbs a coil is placed in each case, and having at least one carrier on which the crosspiece is fixed and which has bearing faces for the coils. At least two supporting blocks for each coil are mounted on each bearing surface. The supporting blocks are fitted with elastic compensation elements on the coil-side carrying face and have, on their longitudinal side faces, which run perpendicular to a carrying surface, at least one strip which extends the creepage path and runs in the longitudinal direction and parallel to the carrying surface of the supporting block.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: September 25, 2012
    Assignee: ABB Technology AG
    Inventors: Karl-Heinz Zillmann, Wolfgang Moenig, Benjamin Weber
  • Publication number: 20110121928
    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: Application
    Filed: February 1, 2011
    Publication date: May 26, 2011
    Applicant: APPLE INC.
    Inventor: Dayu Qu
  • 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
  • Publication number: 20090106564
    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: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Applicant: APPLE INC.
    Inventor: Dayu Qu
  • Publication number: 20070194875
    Abstract: A filter mainly includes a coil connecting frame, a plurality of coils received in the frame, and a first circuit board. The frame comprises a first surface with a plurality of first pins and a second surface, opposite to the first surface, with a plurality of second pins. The first pins are connected to the first circuit board, and the second pins are connected to an external electronic device while both the first and second pins are connected to the coils. The coil connecting frame further includes an electrical connecting portion between the first surface and the second surface with a plurality of conducting pins which penetrate through the first and second surfaces to connect to the circuit board and the second pins or external electronic device.
    Type: Application
    Filed: February 1, 2007
    Publication date: August 23, 2007
    Inventors: Jun Wang, Xin-Hua Li, Han-Cheng Hsu
  • Patent number: 7193495
    Abstract: A magnetically influenced current or voltage regulator includes a body of an anistropic magnetisable material that provides a closed, magnetic circuit. A first electrical conductor is wound around the body along at least a part of the closed circuit for at least one turn which forms a first main winding. At least one second electrical conductor is wound around the body along at least a part of the closed circuit for at least one turn which forms a control winding. The winding axis for the main winding is at right angles to the winding axis for the control winding. Orthogonal magnetic fields are generated in the body when the first main winding and the control winding are excited. A characteristic of the anisotropic magnetisable material relative to a field in the main winding is controlled by means of a field in the control winding.
    Type: Grant
    Filed: January 11, 2005
    Date of Patent: March 20, 2007
    Inventors: Espen Haugs, Frank Strand
  • Patent number: 7180396
    Abstract: The present invention relates to a superconducting current limiting device comprising a superconductor component (1) wherein each superconductor component (1) comprises a superconductor body (2) on which a coil (3) is wound the coil being electrically connected to the superconductor body (2) wherein in the superconducting current limiting device a magnetic field is generated on transition of the superconductor from the superconducting state to the normal conducting state.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: February 20, 2007
    Assignee: Nexans
    Inventors: Joachim Bock, Steffen Elschner, Frank Breuer
  • Patent number: 6933822
    Abstract: A magnetically influenced current or voltage regulator includes a body of an anisotropic magnetisable material that provides a closed magnetic circuit. A first electrical conductor is wound around the body along at least a part of the close circuit for at least one turn which forms a first main winding. At least one second electrical conductor is wound around the body along at least a part of the closed circuit for at least one turn which forms a control winding. The winding axis for the main winding is at right angles to the winding axis for the control winding. Orthogonal magnetic fields are generated in the body when the first main winding and the control winding are excited. A characteristic of the anisotropic magnetisable material relative to a field in the main winding is controlled by means of a field in the control winding.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: August 23, 2005
    Assignee: Magtech AS
    Inventors: Espen Haugs, Frank Strand
  • Publication number: 20040027225
    Abstract: A micro electromechanical differential actuator is comprised of a suspension arm structure and/or a bridge structure to make a two-degree-of-freedom and bi-directional motion. The actuator support base can make out-of-plane or in-plane vertical and horizontal motions. The invention is applicable in optical micro electromechanical devices such as optical switches, variable optical attenuators, optical tunable filters, modulators, tunable VCSEL's, grating modulators, micro displays, and RF switches.
    Type: Application
    Filed: December 2, 2002
    Publication date: February 12, 2004
    Inventors: Hsiao-Wen Lee, Wen-I Wu, Shih-Yi Wen, Wu-Cheng Kuo, Jui-Ping Weng
  • Patent number: 6547596
    Abstract: The design of the present invention compiles EMI protection of two formerly separated filtering devices (coil and ferrite beads) in one optimal packaging. It consists of a coil wound around a cylindrical tubular ferrite bead and welded at one end to the terminal receptacle fed through the ferrite bead. The signal is routed through the coil and then through the ferrite bead providing added filtering effect. The design provides further performance improvement and significant reduction of the packaging size. The filtering system of the present invention has a superior performance and efficiency in the 100 to 300 MHz range. The present invention provides minimum packaging size for required electrical and mechanical performance. The filter consisting of a coil and a ferrite bead is packaged in the contact portion (or nozzle area) of the connector, eliminating the necessity of packaging space in the connector housing.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: April 15, 2003
    Assignee: Amphenol-Tuchel Electronics GmbH
    Inventors: Slobodan Pavlovic, Gerhard Drescher
  • Patent number: 6437675
    Abstract: A linear coil for inhibiting acoustic noise is provided. A rubber spacer is disposed in addition to the conventional linear coil. By means of the spacer, the vibration, generated when the deflection current passes through the linear coil, is absorbed. As a result, acoustic noise, caused by the collision between the linear coil and the printed circuit board, can be inhibited.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: August 20, 2002
    Assignee: Acer Communications and Multimedia Inc.
    Inventor: Aries Chu
  • Patent number: 6177855
    Abstract: A transformer, comprising: a closed ferrite magnetic circuit having an air gap; a rigid component filling a portion of the air gap; and, a flexible material filling the remainder of the air gap to substantially absorb vibrations of the ferrite. In the case of air gaps greater than approximately 1 mm, the flexible material fills approximately 1 mm of the air gap and the rigid component fills the remainder of the air gap. The rigid component may be of non magnetic, synthetic resin material. The flexible material may be a one component mastic, for example polysulfur, polysulfate polysulphide or polyurethane. The flexible material may also be a silicone type mastic, for example a neutral silicone.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: January 23, 2001
    Assignee: Thomson Television Components France
    Inventors: Jean-Michel Bouillot, David Escudero
  • Patent number: 6114934
    Abstract: A variable linearity coil has a coil which is wound around a first core, a permanent magnet for charging a bias magnetic field to the first core, a bias magnetic field adjusting coil which is wound around a second core, and an electrically insulating base for mounting thereon the coil, the permanent magnet, and the magnetic field adjusting coil. The first core and the second core are placed one on top of the other with a non-magnetic and shock-absorbing spacer in between. Alternatively, the first core and the second core may be placed one on top of the other with a non-magnetic spacer in between, and a combination of the first core, the second core and the non-magnetic spacer is mounted on the base with a shock-absorbing spacer between the combination and the base.
    Type: Grant
    Filed: November 17, 1998
    Date of Patent: September 5, 2000
    Assignee: Taiyo Yuden Kabushiki Kaisha
    Inventors: Takeshi Ikeda, Masaharu Takebuchi, Takashi Tajima
  • Patent number: 6087917
    Abstract: A package for an electronic device, the electronic device including a body having a cavity therein, the body subject to stress from imposition of forces. The package includes a conforming compressible material disposed within at least a portion of the cavity in the body and substantially conforming to an interior configuration of the cavity, reducing imposition of the forces within the cavity and thereby reducing the stress on the body.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 11, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Robert Joseph Roessler, John Albert Sparkes, Jr., William Lonzo Woods, Jr.
  • Patent number: 6028500
    Abstract: The audible noise suppressor for planar magnetic devices functions to eliminate the audible noise generated by the normal operation of a planar magnetic device. This is accomplished by the use of a spacer device which functions to fill the gap between the ferrite core and the printed wiring board. The planar magnetic device comprises an E-shaped ferrite core comprising first second and middle legs, the three legs being inserted through mating holes formed in the printed wiring board. The windings of the planar magnetic device are deposited on the surface of the printed wiring board, in a predetermined pattern about the middle leg of the E-shaped ferrite core that protrudes through the corresponding hole in the printed wiring board. An I-shaped ferrite core is placed in position to span the first, second and middle legs of the E-shaped ferrite core. The E-shaped and I-shaped ferrite cores are held in place by the use of a clip that snap fits over the two ferrite cores.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: February 22, 2000
    Assignee: Lucent Technologies Inc.
    Inventor: Leonard W. Buist
  • Patent number: 5939965
    Abstract: An inductive component with variable magnetic properties. A magnetic field is inductively generated in a magnetic core by an electrical winding. Electrode coatings are provided on the magnetic core and an electrical field or current is impressed into the magnetic core through the electrodes.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: August 17, 1999
    Assignee: Siemens Matsushita Components GmbH & Co. KG
    Inventors: Mauricio Esguerra, Helko Meuche
  • Patent number: 5815059
    Abstract: A toroidal shaped transformer having two levels of structureborne noise isolation is disclosed. A 30-60 dB reduction in noise is achieved by isolation mounting the toroidal transformers coaxially on a central support rod which in turn is supported by an isolation mounted cradle. The isolation layers are made of compliant elastomeric foam rubber material.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: September 29, 1998
    Assignee: Lockheed Martin Corporation
    Inventors: George Edward Dailey, Thomas E. Hatton, Rene D. Mock, Frederick Oswald Volles
  • Patent number: 5726617
    Abstract: An electrical transformer includes a tank containing transformer fluid and a transformer core and winding subassembly located in the transformer fluid within the tank. The electrical transformer also includes a mechanism for varying the dynamic pressure of the transformer fluid within the tank during electromagnetic operation of the transformer core and winding subassembly to cancel out (or reduce) noise-causing vibrations in the transformer fluid which come from the operating transformer core and winding subassembly. Preferably, the electrical transformer further includes an active mount subassembly.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: March 10, 1998
    Assignee: General Electric Company
    Inventors: Frederic Ghislain Pla, Imdad Imam, Frank Albert Pitman, Jr., Stephen Linwood Smith
  • Patent number: 5724017
    Abstract: An electrical transformer includes a housing, a transformer core and winding subassembly located within the housing, and an active mount subassembly having an active mount and a controller. The active mount has a first end attached to the housing and a second end attached to the transformer core and winding subassembly. The controller has an output port connected to the active mount. The active mount cancels out (or reduces) noise-causing vibrations which come from the transformer core and winding subassembly during transformer operation.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: March 3, 1998
    Assignee: General Electric Company
    Inventors: Frederic Ghislain Pla, Imdad Imam, Frank Albert Pitman, Jr., Stephen Linwood Smith
  • Patent number: 5710533
    Abstract: An electrical transformer includes a housing, a transformer core and winding subassembly located in the housing, and a cooling fan subassembly. The cooling fan subassembly includes a variable speed fan located outside the housing, a temperature sensor located near the housing, and a controller having an output port connected to the variable speed fan and an input port connected to the temperature sensor. The controller reduces the fan speed (and hence the fan noise) when a lower fan speed can maintain the desired temperature as sensed by the temperature sensor. Preferably, the electrical transformer further includes an active mount subassembly and/or (when the housing includes a tank containing transformer fluid) a mechanism for varying the dynamic pressure of such transformer fluid.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: January 20, 1998
    Assignee: General Electric Company
    Inventors: Frederic Ghislain Pla, Imdad Imam, Robert Arvin Hedeen, Frank Albert Pitman, Jr., Stephen Linwood Smith
  • Patent number: 5682292
    Abstract: The invention relates to a liquid-cooled valve reactor, in particular for a high-voltage DC transmission installation, including a reactor core (2) and a reactor coil (4), the reactor coil (4) including a primary winding (24), which comprises two cooled winding sections (30, 32), and a secondary winding (26), and the reactor core (2) being provided with a plastic jacket (14). According to the invention, the reactor core (2) is provided with a clamping frame (56) which has on its free surfaces (58) in each case a heat dissipator (60), a liquid-cooled secondary resistor (28) is provided, which is connected electrically in parallel to the secondary winding (26), and the encapsulated reactor core (2) and the reactor coil (4) are mounted on a baseplate (6). The result is an intensively cooled valve reactor.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: October 28, 1997
    Assignee: Siemens Aktiengesellschaft
    Inventor: Tibor Salanki
  • Patent number: 5619174
    Abstract: A noise filter includes an annular magnetic core made of a soft magnetic alloy ribbon mainly made of Fe and containing B and at least one element selected from a group consisting of Ti, Zr, Hf, Nb, Ta, Mo and W, at least 50% of the soft magnetic alloy structure being composed of body-centered cubic structured fine grains having an average grain size of 30 nm or below, a casing for accommodating the magnetic core and having an insulating plate, a pair of coils separated from each other by the insulating plate, and an electronic circuit for connecting a core element made up of the magnetic core, the casing and the coils.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: April 8, 1997
    Assignees: Alps Electric Co., Ltd., Research Development Corp. of Japan, Tsuysohi Masumoto
    Inventors: Youichi Kimura, Akihiro Makino, Tsuyoshi Masumoto, Akihisa Inoue
  • Patent number: 5566047
    Abstract: Disclosed is an AC electrical apparatus including a vibrating device and a mounting structure supporting the device. In the improvement, a resilient insulator is interposed between the device and the mounting structure so that vibrations are isolated from the mounting structure. In a highly preferred embodiment, the insulator has a disc-like component between a standoff spacer and the mounting structure. Another such component is between the mounting structure and the head of the bolt which attaching the device to the structure. And a tube-like component of the insulator is between the bolt and such structure.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 15, 1996
    Assignee: Ruud Lighting, Inc.
    Inventors: Michael J. Kahn, Donald Wandler
  • Patent number: 5184104
    Abstract: An electromagnetic induction apparatus includes a tank having a bottom plate and containing an electrical device which vibrates during operation. The tank is supported by supporting members disposed between the tank bottom plate and a floor surface to define spaces therebetween. Sound suppressing members are disposed in the spaces defined between the support members, the tank bottom plate, and the floor surface. The sound suppressing members absorb sounds generated within the spaces and prevent air within the spaces from resonating during vibration of the electrical device.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: February 2, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Katsumi Kondo
  • Patent number: 5072158
    Abstract: The present invention comprises a transformer having a magnetic core that is smaller and shorter than the winding form for the primary and secondary coils, the core is surrounded by an sound deadening and insulating material, such as foam, and is encased in a sealed tube.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: December 10, 1991
    Assignee: ILC Technology, Inc.
    Inventor: Felix J. Schuda
  • Patent number: 5025241
    Abstract: The present invention concerns a transformer of the ferrite closed magnetic circuit type, with a gap.The gap is filled with a mastic such as the polysulphide or polyurethane mastics having a Shore hardness with constant behaviour as a function of temperature.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: June 18, 1991
    Assignee: Orega Electronique et Mecanique
    Inventors: Jean-Michel Bouillot, Thierry Coutureau, Patrick G. Decuyper
  • Patent number: 4859977
    Abstract: An insulator device to be inserted between a power transformer and a conductive chassis. Insulative washers are monolithically formed with the spacer. One washer is formed for each screw holding the transformer to the chassis. Each washer has a cylindrical protrusion which fits into a hole in the spacer. The screw extends through the washer, protrusion and spacer so as to be insulated from the transformer.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: August 22, 1989
    Assignee: Akai Electric Company, Limited
    Inventors: Kazuto Mochizuki, Katsushi Kawahara
  • Patent number: 4849728
    Abstract: The invention provides an iduction generator comprising a plastic injection-molded housing having a port and one or more pole shoe(s) associated with a permanent magnet. A plastic bobbin inserted into the port and having a coil wound thereon which, through soldering eyelets, is connected to two contact tags in communication with an outwardly guided cable. A mounting member, with the port at the end thereof facing the soldering eyelets being closely sealed by a lid welded to the housing.To provide an induction generator that is easy to manufacture and that insures a substantially improved operation, the port of the housing at the end thereof facing away from the soldering eyelets is closed by a bottom integrally formed with the housing and the pole shoe or shoes along with the associated permanent magnet are integrated in the housing.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: July 18, 1989
    Assignee: Alfred Eves, GmbH
    Inventors: Manfred Goll, Erkenbert Wehner
  • Patent number: 4800306
    Abstract: The device comprises an external inertia element which is fixed to a damping member which is coaxially fixed with respect to a shaft of a stepping motor, in such a way that it can rotate together therewith. The external inertia element comprises a metal mass in the form of an annulus of limited thickness. The damping member comprises a first circular flange to which the annulus is fixed, a second circular flange by means of which the device is fixed to the shaft and an annulus of elastomeric material connecting the two flanges. The materials and the dimensions of the device can be calculated, proportioned and pre-arranged in such a way that the device is compact but can stop oscillations of the stepping motor in a very short time. The device is particularly suited to damping the oscillations of a stepping motor which is used for example for positioning a printing member with respect to a print point or for positioning a recording head with respect to a magnetic disc.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: January 24, 1989
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventor: Massimo Oberto
  • Patent number: 4724413
    Abstract: A low-noise transformer, particularly for the use as an output transformer of an inverter, comprising a sound-proof envelope surrounding at least one of the windings for absorbing or screening noise originating from vibration due to electromagnetic force.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: February 9, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Michio Kataoka
  • Patent number: 4639672
    Abstract: Inside the gradient coils in the magnet system of a nuclear magnetic resonance apparatus there is arranged a sleeve which forms a noise-absorbing shield between the gradient coils and the measurement space. The shield is preferably formed by an evacuated space between the sleeve and a support for the gradient coils. This space is then provided with elastic vacuum seals at its axial ends.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: January 27, 1987
    Assignee: U.S. Philips Corporation
    Inventor: Chritien J. M. Beaumont
  • Patent number: 4558296
    Abstract: A hollow sound damping plate is arranged between a transformer core and an internal limiting surface of a transformer tank filled with insulating fluid. At least one compressive-force transmitting spring member (8) is arranged between the front wall (6) and the rear wall (5).
    Type: Grant
    Filed: February 5, 1985
    Date of Patent: December 10, 1985
    Assignee: ASEA Aktiebolag
    Inventor: Stellan Thoren
  • Patent number: 4514714
    Abstract: A noise-reduction device for a stationary induction apparatus which device comprises a sound insulation panel attached to reinforcing channels provided at the periphery of a tank of the stationary induction apparatus so as to block noises emitted from the outer surface of the tank, a weighty body attached to the sound insulation panel for reducing vibrations of the sound insulation panel and a dynamic damper of which the natural frequency can be adjusted to be made equal to the vibration frequency of the weighty body so as to cancel the vibrations of the weighty body.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: April 30, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Kanoi, Yasuro Hori, Yuzuru Kamata
  • Patent number: 4513274
    Abstract: The current transformer for instruments for measuring electric currents includes a magnetic core that has two cores and an inductive current divider with three parallel current paths. The current dividers form, together with cores, two current transformer stages whose magnetic fluxes mutually cancel one another. In a current transformer for AC currents having a DC component, the ratio of the ohmic resistances of the individual current paths is in direct relation to their transformation ratio.
    Type: Grant
    Filed: April 14, 1983
    Date of Patent: April 23, 1985
    Assignee: LGZ Landis & Gyr Zug AG
    Inventor: Mathis Halder