Liquid Insulating Medium Patents (Class 336/58)
  • Patent number: 10748682
    Abstract: A surge arrester system includes a surge arrester, and an active cooling system having a cooling interface in contact with the surge arrester and operative to transfer heat from the surge arrester. The active cooling system includes a forced convection apparatus operative to provide forced convection cooling. A circuit breaker system includes a power semiconductor switch and an active cooling system constructed to cool the power semiconductor switch. The active cooling system includes a forced convection apparatus configured to provide forced convection cooling. The power semiconductor switch is in contact with the active cooling system. A surge arrester is disposed adjacent to and in contact with the active cooling system. The active cooling system includes a cooling interface constructed for contact with the surge arrester and operative to provide cooling to the surge arrester. The power semiconductor switch and the surge arrester dissipate power alternatively.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 18, 2020
    Assignee: ABB Schweiz AG
    Inventors: Colin Tschida, Pietro Cairoli, Francesco Agostini, Daniele Torresin, Davide Leoni, Luca Raciti, Zhiguo Pan
  • Patent number: 10690798
    Abstract: Provide are compositions and methods for electromagnetic (EM) surveying of subsurface hydrocarbon reservoirs using a giant dielectric material as a contrast agent. An injection fluid composition for EM surveying may include an aqueous fluid and giant dielectric nanoparticles having a dielectric constant of at least 10000 in the 1 Hz to 1 MHz frequency range. EM surveying of a subsurface hydrocarbon reservoirs may be performed by introducing an injection fluid having the giant dielectric nanoparticles into the subsurface hydrocarbon reservoir and generating an image of the position of the injection fluid from a transit time of emitted EM energy that traveled through the reservoir.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: June 23, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Erika Shoemaker Ellis, Howard Khan Schmidt, Jesus Manuel Felix Servin
  • Patent number: 10356958
    Abstract: An immersion cooling apparatus includes an immersion tank in which an electronic device is disposed and in which a secondary refrigerant is stored, the electronic device being dipped into and cooled down by the secondary refrigerant, a housing in which the immersion tank is disposed and in which a primary refrigerant is stored, the immersion tank being dipped into and cooled down by the primary refrigerant, and a driver that rotates the immersion tank, wherein the immersion tank being rotatably attached to an interior of the housing, the immersion tank having an inner circumferential surface and an outer circumferential surface, the inner circumferential surface being positioned facing the electronic device, the outer circumferential surface being positioned on an opposite side of the inner circumferential surface, each of the inner circumferential surface and the outer circumferential surface having a plurality of projections.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: July 16, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Satoshi Inano, Minoru Ishinabe, Yukiko Wakino, Hiroyuki Fukuda
  • Patent number: 10242243
    Abstract: A fingerprint sensor includes a first conductive pattern formed on one side of a core, a second conductive pattern formed on the first conductive pattern, an insulating layer formed between the first conductive pattern and the second conductive pattern, a dielectric layer configured to cover the second conductive pattern, and a protective layer covering the dielectric layer, wherein the protective layer includes a photosetting resin.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: March 26, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Woon-Chun Kim, Ga-Young Yoo, Hyung-Mi Jung, Hyun-Chul Jung, Jeong-Bok Kwak, Ji-Hye Shim
  • Patent number: 9947453
    Abstract: A stationary induction electric apparatus includes an iron core having legs of core and yokes of core; windings wound around the legs of core; coolant for cooling the windings; a cylindrical insulation structure that forms a flow of the coolant around the windings; baffle members alternately provided on the inner wall side and the outer wall side of the cylindrical insulation structure; and adjustment members for constricting the flow of the coolant. The adjustment members are provided on the same side of the respective baffle members and on the respective baffle members.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: April 17, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Yasunori Ono, Akira Nishimizu, Naoya Miyamoto, Kohei Yamaguchi, Akira Yamagishi
  • Patent number: 9947452
    Abstract: An electrical device includes a winding including an interior portion and an exterior surface, a primary cooling system for cooling the exterior surface of the winding, a secondary cooling system for cooling the interior portion of the winding, and a heat exchanger thermally coupled to the primary cooling system and the secondary cooling system.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: April 17, 2018
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, Jr.
  • Patent number: 9911528
    Abstract: A transformer assembly for a wind turbine is described. The transformer assembly includes a liquid-filled main transformer and an auxiliary transformer connected on the high-voltage side of the main transformer. The auxiliary transformer benefits from improved power quality in this configuration.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: March 6, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Jesper Hillebrandt, Frank Schalow
  • Patent number: 9892845
    Abstract: A transformer assembly and a method of producing the same are provided. The transformer assembly includes a housing, transformer oil, and a plurality of coils of electrically conductive wire. The transformer oil is disposed within the housing. The coils of electrically conductive wire are disposed in the housing and in contact with the transformer oil. A cross-linked aliphatic polyamide insulation material configured to electrically insulate the electrically conductive wire. The insulation material includes stabilizing compounds that provide thermal and chemical stability for the insulation material.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: February 13, 2018
    Inventors: Martin Weinberg, Askim Senyurt
  • Patent number: 9892842
    Abstract: A vehicle is provided with a transmission and an inductor assembly that is mounted within a chamber of the transmission. The inductor assembly includes a coil, a core and an insulator having first and second portions that are oriented toward each other. Each portion includes a base, a support extending from the base, and a spool extending transversely from the support to engage the other portion. Each spool includes an external surface for supporting the coil and a cavity extending therethrough for receiving the core.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 13, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Behzad Vafakhah, Shailesh Shrikant Kozarekar, Shahram Zarei, Brandon Dobbins, Vincent Skalski, Sudhir Kumar
  • Patent number: 9761365
    Abstract: In large area plasma processing systems, process gases may be introduced to the chamber via the showerhead assembly which may be driven as an RF electrode. The gas feed tube, which is grounded, is electrically isolated from the showerhead. The gas feed tube may provide not only process gases, but also cleaning gases from a remote plasma source to the process chamber. The inside of the gas feed tube may remain at either a low RF field or a zero RF field to avoid premature gas breakdown within the gas feed tube that may lead to parasitic plasma formation between the gas source and the showerhead. By feeding the gas through an RF choke, the RF field and the processing gas may be introduced to the processing chamber through a common location and thus simplify the chamber design.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: September 12, 2017
    Assignee: Applied Materials, Inc.
    Inventors: Jozef Kudela, Carl A. Sorensen, John M. White
  • Patent number: 9483063
    Abstract: Described embodiments include a device, a system, and a method. A described device includes a closed-cycle heat transfer device. The device includes a thermal management system adapted for dissipating heat generated by transmission lines of a power transmission system in use to transport electric power from one place to another. The system includes a heat-dissipation device and a transmission-line temperature manager. The heat-dissipation device includes a heat-acquisition element configured to absorb heat from a portion of a live transmission line of the power transmission system. The heat-dissipation device includes an assembly of one or more controllable fins thermally coupled to the heat-acquisition element and configured to dissipate at least a portion of the heat absorbed by the heat-acquisition. The transmission-line temperature manager is configured to control an aspect of the assembly of one or more controllable fins.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: November 1, 2016
    Inventors: Roderick A. Hyde, Jordin T. Kare, Thomas A. Weaver, Lowell L. Wood, Jr.
  • Patent number: 9304519
    Abstract: Described embodiments include a device, a method, and a system. A described device includes a closed-cycle heat transfer device. The device includes a hollow member configured to be thermally coupled with and to be disposed substantially parallel to a length of a live transmission line of an overhead power transmission system. The power transmission system is configured to transport electric power from one place to another. The device includes a working fluid contained within the hollow member and tuned to transport heat received from the live transmission line to a heat removal structure. The device includes the heat removal structure configured to dissipate the transported heat.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: April 5, 2016
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Thomas A. Weaver, Lowell L. Wood, Jr.
  • Patent number: 8963677
    Abstract: An oil immersed stereo wound-core amorphous alloy transformer, comprising an iron core, a high-low voltage winding, leads and a tank. The core comprises three single frames made of amorphous alloy strips by winding and are identical in structure, and the single frames have a rectangular shape; the vertical sides of every two adjacent frames fit together fixedly to form a core pillar, and the horizontal sides of the single frame form iron yokes; the cross sections of the core pillars have an approximately circular or polygonal shape; the transformer further comprises a clamp, comprising a quasi-triangular upper and lower clamp, and posts, the lower clamp is provide with three food pads; the iron yokes in the lower portion of the iron core are located on the foot pads, and the high-low voltage winding is wound on the core pillars.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: February 24, 2015
    Assignee: Haihong Electric Co., Ltd.
    Inventors: Kaixuan Xu, Xianqing Guo
  • Patent number: 8947187
    Abstract: The invention comprises an electrical apparatus and method of manufacture. The apparatus includes a substantially annular inductor comprising an inductor core composed of at least a distributed gap material. The distributed gap material includes particles of alternating layers of magnetic and non-magnetic materials separated by a gap material. The particles comprise an average layer thickness of less than about one hundred micrometers, where a majority of said layered particles comprise an average cross sectional size of less than about one millimeter. The inductor is cooled using at least one of: a thermally conductive potting material, a liquid coolant in direct contact with the inductor, a cooling line through the potting material or liquid coolant, and a chill coil in a container about the potting material and/or the liquid coolant.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: February 3, 2015
    Inventor: Grant A. MacLennan
  • Publication number: 20150015355
    Abstract: An oil-filled transformer switching frame is disclosed which includes at least one longitudinal channel element that is essentially formed by a wall that is curved in a U-shaped manner, for receiving in its inner region stranded conductors of an oil tank of an oil transformer. The wall of the channel element can include a first layer of mechanically strong, planar insulating material and a second layer of mechanically strong, planar insulating material that is adjacent to and fundamentally parallel to said first layer, the first layer and the second layer being connected to and spaced apart by a third layer of a mechanically strong, corrugated insulating material having hollow spaces that can be flooded with a fluid by way of lateral edges.
    Type: Application
    Filed: June 18, 2014
    Publication date: January 15, 2015
    Applicant: ABB TECHNOLOGY AG
    Inventors: Hartmut BRENDEL, Matthias Starke, Marikka Hübner, Ralf Büchner, Klaus Herkert, Isidoro Li Pira
  • Patent number: 8928442
    Abstract: The object of the invention is an inductive component equipped with a liquid cooling and a method for manufacturing an inductive component. The inductive component comprises at least a core (2) assembled from separate structural elements (8, 8a, 8b), a winding (5), and connection means (7) as well as ducts (9) integrated into the core (2) for the purpose of liquid cooling. Each structural element (8, 8a, 8b) comprises an aperture (9a, 13, 18) made in the manufacturing phase of the structural element (8, 8a, 8b), which aperture extends through the structural element and is a short part of the duct (9) intended for the purpose of liquid cooling.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: January 6, 2015
    Assignee: Earl Energy, LLC
    Inventor: Jarkko Salomäki
  • Patent number: 8928443
    Abstract: An electrical device includes a winding, a primary cooling system, a secondary cooling system, and an actuator. The winding includes an interior portion and an exterior surface. The primary cooling system cools the exterior surface of the winding. The secondary cooling system cools the interior portion of the winding. The actuator is configured to actuate the secondary cooling system in response to a sensed condition of the electrical device or a predicted condition of the electrical device.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: January 6, 2015
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, Jr.
  • Patent number: 8922311
    Abstract: An electrical inductor assembly includes an inductor core having a relatively circular geometry. Also included is a wire guide surrounding and retaining the inductor core, the wire guide having a plurality of slots for retaining and guiding a plurality of wires. Further included is an outer housing surrounding and retaining the wire guide and a substance disposed within at least one of the plurality of slots of the wire guide.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: December 30, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Debabrata Pal, John Horowy
  • Publication number: 20140354387
    Abstract: An exemplary oil transformer insulation module includes at least a first flat layer and a second layer adjacent and substantially and parallel to the first layer. The first and second layers include planar first insulation material and are connected to and spaced apart from a third corrugated layer that is arranged between the first and second layers. The third layer includes planar second insulation material, has lateral edges, and is corrugated such that all the cavities formed by the corrugated form can be flooded with a liquid via the lateral edges.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Inventor: Hartmut BRENDEL
  • Patent number: 8902033
    Abstract: An inductor comprises a ferromagnetic core, a litz wire conductor encircling the ferromagnetic core, a housing, a bobbin, a conductive pin, and a seal assembly. The housing encloses the ferromagnetic core and the litz wire conductor. The conductive pin is conductively attached to the litz wire conductor, and extends therefrom to form an external electrical contact. The bobbin supports the litz wire conductor and positions the conductive pin in alignment with an aperture in the housing which is sealed against fluid egress by the seal assembly.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 2, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Charles Shepard, Kris H. Campbell, Adam M. Finney, Robert Scott Downing
  • Publication number: 20140327506
    Abstract: An oil transformer includes a transformer vessel, a transformer core mounted in the vessel, at least one upright hollow cylindrical transformer coil including at least one axial cooling channel arranged around a limb of the transformer core, and an oil chamber arranged at an axial front side of the transformer coil. At least one first opening leading from the inner chamber to the belonging front side of the transformer coil is provided, and at least one second opening is provided within the surrounding boundaries of the oil chamber. The oil chamber is an under-pressure chamber, wherein the at least one first opening is an inlet port and the at least one second opening is an outlet port.
    Type: Application
    Filed: June 9, 2014
    Publication date: November 6, 2014
    Applicant: ABB TECHNOLOGY AG
    Inventors: Andreas GUSTAFSSON, Erik Wedin, Johan Engström, Erik Forsberg, Lars E. Schmidt, Hartmut Brendel
  • Publication number: 20140252775
    Abstract: A transformer assembly for a wind turbine is described. The transformer assembly includes a liquid-filled main transformer and an auxiliary transformer connected on the high-voltage side of the main transformer. The auxiliary transformer benefits from improved power quality in this configuration.
    Type: Application
    Filed: October 26, 2012
    Publication date: September 11, 2014
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Jesper Hillerbrandt, Frank Schalow
  • Patent number: 8816808
    Abstract: An inductor cooling method and apparatus is provided, where the inductor comprises both a substantially annular core and an aperture therethrough. The aperture is circumferentially surrounded by the substantially annular core. A container holds a substantially non-conductive coolant and the inductor is immersed in the coolant. Optional spacers hold the inductor away from the container to allow room for coolant circulation.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: August 26, 2014
    Inventors: Grant A. MacLennan, Benjamin L. Richie, Jr.
  • Publication number: 20140191834
    Abstract: The invention comprises an electrical apparatus and method of manufacture. The apparatus includes a substantially annular inductor comprising an inductor core composed of at least a distributed gap material. The distributed gap material includes particles of alternating layers of magnetic and non-magnetic materials separated by a gap material. The particles comprise an average layer thickness of less than about one hundred micrometers, where a majority of said layered particles comprise an average cross sectional size of less than about one millimeter. The inductor is cooled using at least one of: a thermally conductive potting material, a liquid coolant in direct contact with the inductor, a cooling line through the potting material or liquid coolant, and a chill coil in a container about the potting material and/or the liquid coolant.
    Type: Application
    Filed: January 9, 2013
    Publication date: July 10, 2014
    Applicant: CTM Magnetics, Inc.
    Inventor: Grant A. MacLennan
  • Publication number: 20140184371
    Abstract: A nonwoven web of poly(phenylene-1,3,4-oxadiazole) and polymetaphenylene isopthalamide. was found to have greater retention of tensile strength than kraft paper after immersion in oil at high temperature, making it useful as an insulation material for transformers.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark Andrew Harmer, Sharlene Renee Williams, Michael W. Cobb
  • Publication number: 20140159843
    Abstract: An immersion cooled inductor includes an inductor at least partially submerged in cooling liquid and a localized boiling feature operable to instigate boiling of the cooling liquid prior to oversaturation.
    Type: Application
    Filed: February 18, 2014
    Publication date: June 12, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventor: Robert Scott Downing
  • Patent number: 8742876
    Abstract: The disclosure relates to a transformer coil which can be cooled by a heat pipe and has a primary winding and a secondary winding and relates to a transformer which is formed from transformer coils which can be cooled in this way. The heat from the transformer coil is dissipated by the heat pipe. The evaporator of the heat pipe is arranged in the area of the windings and forms at least one extensive evaporator segment, which extends in the circumferential direction of the windings and along the winding axis of the transformer coil and in the process covers a multiplicity of the turns of the secondary winding.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: June 3, 2014
    Assignee: ABB Technology AG
    Inventors: Daniel Chartouni, Rafael Murillo, Tilo Bühler
  • Patent number: 8717134
    Abstract: A system comprises a tank, a radiator connected to the tank, and a component situated within the tank and susceptible to creating increasing pressure within system when under a fault condition. The radiator is configured to directionally vent pressure under excessive pressure conditions.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: May 6, 2014
    Assignee: General Electric Company
    Inventors: Florian Peter Pintgen, Paul Alfred Siemers, Malcolm Graham Smith, Jr.
  • Patent number: 8710946
    Abstract: A rupture resistant system comprises a tank comprising a top member, a sidewall member, and a bottom member, and a component situated within the tank and susceptible to creating increasing pressure within the tank when under a fault condition. At least one of the top, sidewall, and bottom members is connected to another of the top, sidewall, and bottom members in a manner so as to cause an increase in inner volume of the tank under increased pressure conditions.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: April 29, 2014
    Assignee: General Electric Company
    Inventors: Florian Peter Pintgen, Paul Alfred Siemers, Malcolm Graham Smith, Jr.
  • Patent number: 8680959
    Abstract: An immersion cooled inductor includes an inductor at least partially submerged in cooling liquid and a localized boiling feature operable to instigate boiling of the cooling liquid prior to oversaturation.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: March 25, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Robert Scott Downing
  • Patent number: 8617434
    Abstract: A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: December 31, 2013
    Assignee: Cooper Industries, LLC
    Inventors: Kevin J. Rapp, Jerry L. Corkran, Gary A. Gauger, Charles P. McShane
  • Patent number: 8614614
    Abstract: It is described a single-phase or three-phase distribution electric transformer, of solid insulation, for use in aerial installation, in poles, in platforms or pedestals, or installation in underground distribution network for operation in air environment, semi-submerged or submerged. Such transformer comprises at least one high voltage winding (3) and at least one low voltage winding (2) concentrically assembled around a core column (1.2,1.3), the low voltage and high voltage windings (2,3) being electrically isolated from a solid material, a core window (20) being defined as a space between two core columns (1.2,1.3), the transformer comprising at least one electrical insulation sheet (4) assembled on at least a core window (20) of said transformer, the assembly of the electrical insulation sheet (4) being defined in the longitudinal direction (300) of the transformer. Such sheet (4) avoids the formation of spiral around the core by immersion water or conductive dust.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: December 24, 2013
    Assignee: Siemens Ltda.
    Inventors: Martin Alsina Navarro, Jose Carlos Medeiros, Eledilson Clayton Betiol, Marilucia Martinato, Renan Junqueira Dias, Jean Carlos da Silva
  • Patent number: 8604899
    Abstract: An electrical transformer is disclosed which includes an enclosure; a magnetic core assembly arranged within the enclosure, the magnetic core assembly having a first core limb, a second core limb and a third core limb; and three coil assemblies having a first coil assembly, a second coil assembly, and a third coil assembly. At least two diaphragms are arranged within the enclosure, the diaphragms being essentially sealed to a first outermost coil of the first coil assembly, and arranged for guiding a cooling fluid in series through a first inner fluid duct, a second inner fluid duct, a third inner fluid duct and an extra-coil volume along outsides of third, second and first outermost coil coils of the third, second and first coil assemblies.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: December 10, 2013
    Assignee: Abb Research Ltd.
    Inventors: Bernardo Galletti, Arthouros Iordanidis, Jasmin Smajic, Martin Carlen
  • Publication number: 20130300525
    Abstract: An immersion cooled inductor includes an inductor at least partially submerged in cooling liquid and a localized boiling feature operable to instigate boiling of the cooling liquid prior to oversaturation.
    Type: Application
    Filed: May 9, 2012
    Publication date: November 14, 2013
    Inventor: Robert Scott Downing
  • Publication number: 20130285781
    Abstract: A system is provided. The system includes about 99.9 Wt % to about 95 Wt % of an insulating liquid, and about 0.1 Wt % to about 5 Wt % of insulating, inorganic, non-magnetic nanoparticles. Another aspect of the invention includes an electrical apparatus. The electrical apparatus includes an insulation system that comprises a dielectric fluid having about 99.9 Wt % to about 95 Wt % of an insulating liquid, and about 0.1 Wt % to about 5 Wt % of insulating, inorganic, non-magnetic nanoparticles.
    Type: Application
    Filed: April 30, 2012
    Publication date: October 31, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Weijun Yin
  • Publication number: 20130278369
    Abstract: An inductor comprises a ferromagnetic core, a litz wire conductor encircling the ferromagnetic core, a housing, a bobbin, a conductive pin, and a seal assembly. The housing encloses the ferromagnetic core and the litz wire conductor. The conductive pin is conductively attached to the litz wire conductor, and extends therefrom to form an external electrical contact. The bobbin supports the litz wire conductor and positions the conductive pin in alignment with an aperture in the housing which is sealed against fluid egress by the seal assembly.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 24, 2013
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Charles Shepard, Kris H. Campbell, Adam M. Finney, Robert Scott Downing
  • Patent number: 8552737
    Abstract: A high-voltage transformer for providing an alternating voltage in the kV range, comprising at least one secondary winding wound on a coil carrying body surrounding a transformer core, and an insulation housing encapsulating the secondary winding is provided to electrically insulate the secondary winding. Said insulation housing is walled by the coil carrying body carrying the secondary winding and by an enveloping body made of plastic and enveloping the secondary winding so that an annular gap is formed, wherein the annular gap between the secondary winding and the enveloping body is filled with an insulating fluid. The annular gap has a gap width of less than or equal to 20 mm viewed in the cross-section, and the enveloping body has a wall thickness of less than or equal to 20 mm, wherein the plastic is polypropylene, and a separate expansion volume is not provided for the insulating fluid.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: October 8, 2013
    Assignee: B2 Electronic GmbH
    Inventors: Rudolf Blank, Stefan Baldauf
  • Publication number: 20130257574
    Abstract: An inductor assembly includes a substrate, an outer cylindrical housing arranged on the substrate, a wound inductor core arranged in the outer cylindrical housing, and a working fluid disposed in the outer cylindrical housing and in contact with the wound inductor core.
    Type: Application
    Filed: April 3, 2012
    Publication date: October 3, 2013
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Robert S. DOWNING, Charles SHEPARD
  • Publication number: 20130243033
    Abstract: Method of assessing the remaining lifetime of a transformer operating at temperatures above IEC 60° C./65° C./78° C. or IEEE 65° C./65° C./80° C. including a core, a winding conductor covered by high temperature insulation material and pressboard material arranged as an insulation barrier and/or a supporting structure. The covered winding conductor and the pressboard material are immersed in a fluid having a fire point of at least 300° C. The method includes at least twice measuring the temperature of the fluid at its top surface and registering the time of each measurement and assessing the remaining lifetime of the transformer as a function of the measured temperatures and the corresponding registered times, and/or obtaining a sample of pressboard material that has been in contact with the fluid at its top surface and analysing the sample to assess the remaining lifetime of the transformer.
    Type: Application
    Filed: May 3, 2013
    Publication date: September 19, 2013
    Inventor: Roberto Asano, JR.
  • Publication number: 20130162381
    Abstract: An oil immersed stereo wound-core amorphous alloy transformer, comprising an iron core, a high-low voltage winding, leads and a tank.
    Type: Application
    Filed: October 31, 2011
    Publication date: June 27, 2013
    Applicant: GUANGDONG HAI HONG CO., LTD
    Inventors: Kaixuan Xu, Xianqing Guo
  • Patent number: 8471662
    Abstract: An oil transformer insulation module includes a plurality of disc-like insulation elements of identical type which are arranged flush one above another along a line, connected to one another and have in each case at least a similar outline contour. An insulation element includes a first flat layer and a second layer adjacent and predominantly parallel thereto. The first and second layers are composed of a mechanically strong, planar first insulation material. The first and second layers of the first insulation material are connected to and spaced apart from a third, corrugated layer arranged between the first and second layers and composed of a mechanically strong, planar second insulation material. The third layer has lateral edges and is corrugated in such a way that all the cavities formed by the corrugated form can be completely flooded with a liquid via the lateral edges of the insulation element.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: June 25, 2013
    Assignee: ABB Technology AG
    Inventors: Hartmut Brendel, Matthias Starke
  • Patent number: 8461953
    Abstract: An air cooling system, method, apparatus and kit applied to lower transformer operating temperatures, such as governed by a tank or container of oil, allowing transformer components to run more efficiently at a lower temperature level, e.g., down from the hot level operating temperatures typical in stressed conventional devices. By lowering the operational levels to within or below the nominal operational temperature ranges for the equipment, and recovering heat generated during operation, several advantages are obtained.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: June 11, 2013
    Inventor: Marvin W. Ward
  • Patent number: 8456263
    Abstract: The scope of the invention is a winding arrangement for an inductive component that consists at least of a core (9) and of a winding structure placed around the core and consisting of planar winding sheets (11). Inside the winding structure there is cooling medium that is adapted to transfer excess heat away from the winding.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: June 4, 2013
    Inventor: Jarkko Salomäki
  • Publication number: 20130113588
    Abstract: A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material.
    Type: Application
    Filed: December 21, 2012
    Publication date: May 9, 2013
    Applicant: Cooper Industries, Inc.
    Inventor: Cooper Industries, Inc.
  • Patent number: 8436706
    Abstract: A pumped loop cooling system is provided to cool a hollow winding of a transformer utilizing a two phase vaporizable dielectric refrigerant. A liquid refrigerant pump circulates the refrigerant into a transformer and through a copper tube winding of the transformer where the refrigerant at least partially vaporizes in removing heat from the transformer. The refrigerant is then circulated to a condenser and then back to the pump.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: May 7, 2013
    Assignee: Parker-Hannifin Corporation
    Inventors: Abhijit Ashok Sathe, David Scott Gill, Robert Dale Thompson
  • Patent number: 8416042
    Abstract: To improve the cooling efficiency of a transformer operated in a wind power station, there is provided a cooling system comprising a transformer guard housing having a first opening for supply of a transformer cooling medium and having a second opening for discharge of the transformer cooling medium. Further, a first channel system supplies the transformer cooling medium to the transformer guard housing. A second channel system discharges the transformer cooling medium from the transformer guard housing. Through the provision of the cooling system, a controlled flow of cooling medium to the transformer accommodated in the transformer guard housing increases operative efficiency of the installation.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: April 9, 2013
    Assignee: Starkstrom-Geratebau GmbH
    Inventor: Arnold Schwaiger
  • 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: 8390414
    Abstract: A transformer for converting 3 phase AC to 9 phase AC power is provided. The transformer comprising a laminated core, first, second and third coils constructed on the laminated core, each coil including several windings. Cooling ducts are provided in each coil, wherein at least one cooling duct is disposed between the laminated core and an adjacent winding of the respective coil. The transformer further includes first, second and third input terminals each linked to the first, second and third coils, and configured to receive a first, second and third phases of input AC power and first through ninth output terminals linkable to first through ninth output power lines.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: March 5, 2013
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Bruce W. Weiss, Nickolay N. Guskov
  • Patent number: 8368498
    Abstract: [Task] There are provided a coil that is simple in structure and excellent in high frequency characteristics and a method for manufacturing the same. [Means for Resolution] The coil includes a plurality of conductor patterns 11 formed at an interval from each other on a substrate 21, and metal wires 12 that electrically connect an end of one conductor pattern of conductor patterns adjacent to each other with an end of the other conductor pattern that is an end opposite to the end of the one conductor pattern. One or more spiral shapes are formed by two or more conductor patterns 11 and one or more metal wires 12. The coil includes a core material 13 that is arranged at least in a portion inside a space surrounded by one or more spiral shapes to cover the outer peripheries of the metal wires 12 at least over a predetermined range.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: February 5, 2013
    Assignee: Anritsu Corporation
    Inventor: Makoto Saito
  • Publication number: 20130026764
    Abstract: A transformer for wind power generation is configured such that the transformer's main body, which contains an insulating refrigerant in a tank where an iron core and windings mounted to the iron core are contained, is disposed in a tower which configures a wind power generation system, and that water surrounding the wind power generation system is used as a secondary refrigerant for cooling the aforementioned refrigerant.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 31, 2013
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Noriyuki Hayashi, Takahide Matsuo, Toshiki Shirahata, Junji Ono, Hideharu Ohama