Polyphase Patents (Class 336/5)
  • Patent number: 11120939
    Abstract: An auto transformer rectifier unit (ATRU) is provided. The ATRU comprises a transformer configured to receive a three-phase alternating current input and produce a ten-phase alternating current output, and a rectifier configured to receive the ten-phase alternating current output and output a bipolar direct current.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: September 14, 2021
    Assignee: The Boeing Company
    Inventor: Jian Huang
  • Patent number: 11056260
    Abstract: A reactor includes a plurality of iron cores and a winding wound on any of the plurality of iron cores; a gap is formed between two iron cores facing against each other; a gap-facing surface of one iron core has an area larger than that of a gap-facing surface of the other iron core.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: July 6, 2021
    Assignee: Fanuc Corporation
    Inventor: Masatomo Shirouzu
  • Patent number: 11004590
    Abstract: A core body of a reactor includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps, which can be magnetically coupled, are formed between one of the at least three iron cores and another iron core adjacent thereto. The reactor includes cover parts which at least partially cover the iron cores and provide insulation from the coils.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: May 11, 2021
    Assignee: Fanuc Corporation
    Inventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
  • Patent number: 10978243
    Abstract: The present invention allows individual control of an output voltage of a main transformer and an output voltage of a teaser transformer while utilizing output characteristics of the respective transformer when a Scott connected transformer has control equipment arranged on the input side thereof, including first control equipment arranged in one of two phases of the main transformer on the input side in order to control a voltage or a current and second control equipment arranged in one end of a primary coil of the teaser transformer on the input side in order to control a voltage or a current, the control equipment controlling an output voltage of the main transformer and an output voltage of the teaser transformer individually.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: April 13, 2021
    Assignee: TOKUDEN CO., LTD.
    Inventors: Toru Tonomura, Sachio Tamaki, Yasuhiro Fujimoto
  • Patent number: 10818423
    Abstract: A reactor according to an embodiment of the present disclosure includes a core body. The core body includes a peripheral iron core composed of a plurality of peripheral iron core portions, at least three iron cores coupled to the peripheral iron core portions, and coils wound on the iron cores. Gaps are formed between one of the iron cores and another iron core adjacent thereto, so as to be magnetically connectable through the gaps. The reactor further includes a plurality of covering portions each for covering each of the coils. The covering portions adjacent in a circumferential direction can be fitted to each other.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: October 27, 2020
    Assignee: Fanuc Corporation
    Inventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
  • Patent number: 10790084
    Abstract: A multi-phase iron-core reactor has an iron core and windings. The iron core includes an outer iron core and an inner iron core. The outer iron core has teeth on which the N-phase windings are wound. The inner iron core faces the teeth through gaps, and has a shape so as to be able to provide at least two gap sizes in a selective manner.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: September 29, 2020
    Assignee: Fanuc Corporation
    Inventors: Takafumi Kajiya, Hisashi Maeda
  • Patent number: 10770218
    Abstract: A reactor includes an outer peripheral iron core and at least three iron-core coils that contact or are connected to an inner surface of the outer peripheral iron core. Each of the iron-core coils includes iron cores and coils wound onto the iron cores. The reactor further includes an external cooling unit disposed outside the outer peripheral iron core, to cool the outer peripheral iron core.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 8, 2020
    Assignee: Fanuc Corporation
    Inventors: Kenichi Tsukada, Masatomo Shirouzu
  • Patent number: 10763030
    Abstract: A unique transformer includes a first yoke formed of laminations oriented parallel to a first plane; a second yoke formed of laminations oriented parallel to the first plane; and a center leg formed of laminations oriented parallel to a second plane oriented at a non-zero angle relative to the first plane. The center leg includes a first end. The first yoke and the second yoke are in contact with the center leg at the first end. The transformer includes a coil disposed about the center leg, and a butt joint between the center leg and at least one of the first yoke and the second yoke.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: September 1, 2020
    Assignee: ABB Power Grids Switzerland AG
    Inventors: Charlie Sarver, William E. Pauley
  • Patent number: 10734154
    Abstract: A core body includes an outer peripheral iron core and at least three iron cores inside the outer peripheral iron core and extending in the radial direction thereof. At least one of the outer peripheral iron core and the at least three iron cores is formed of a hoop material wound body formed by winding a hoop material.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: August 4, 2020
    Assignee: FANUC CORPORATION
    Inventor: Masatomo Shirouzu
  • Patent number: 10665384
    Abstract: A voltage step-up autotransformer topology and an AC-to-DC converter including such an autotransformer are provided. The autotransformer is configured to take, at input, a three-phase AC current (for example 115 VAC with a constant frequency), and to output nine output voltages, which are supplied to an 18-pulse rectifier bridge assembly so as to supply a high DC voltage (for example +270 VDC/?270 VDC). These are particularly suitable for AC-to-DC converters in the aeronautical sector.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: May 26, 2020
    Assignee: THALES
    Inventors: Mathieu Mairie, Frederic Lacaux, Remy Biaujaud
  • Patent number: 10650954
    Abstract: A transformer apparatus that may be applied as a distribution circuit adaptor (DCA) inserted into a branch supply circuit to reduce losses in a power distribution network. More particularly, implementations of the present disclosure provide a high-efficiency 2-phase dry type transformer apparatus with a removable core, as well as integrated instrumentation and thermal self-management.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: May 12, 2020
    Assignee: ENERGO GROUP CANADA INC.
    Inventors: Dragan Lemez, Aleksander Lemez
  • Patent number: 10650956
    Abstract: A core body of a reactor includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps, which can be magnetically coupled, are formed between one of the at least three iron cores and another iron core adjacent thereto. The reactor includes cover parts which at least partially cover the iron cores and provide insulation from the coils.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: May 12, 2020
    Assignee: FANUC CORPORATION
    Inventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
  • Patent number: 10537938
    Abstract: The present invention provides a magnetic core having insulating properties, and a method for manufacturing the magnetic core. Provided is a magnetic core manufactured by compression molding and subsequent thermal curing of an iron-based soft magnetic powder having a resin coating formed on particle surfaces thereof. The iron-based soft magnetic powder is one in which the particle surfaces have been coated with an inorganic insulator; the resin coating is an uncured resin coating formed by dry blending the powder with a thermosetting resin at a temperature equal to or greater than the softening point of the thermosetting resin and lower than the thermal curing initiation temperature of the resin; the compression molding is carried out by using a mold to produce a compression molded body; and the thermal curing is carried out at a temperature equal to or greater than the thermal curing initiation temperature of the thermosetting resin.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: January 21, 2020
    Assignee: NTN CORPORATION
    Inventors: Takuji Harano, Hiroyuki Noda
  • Patent number: 10505459
    Abstract: A power conversion device including: a reactor formed such that a DC winding and a plurality of coupled windings are wound around one magnetic body, one end of the DC winding is connected to a voltage source, one end of each of the plurality of coupled windings is connected to another end of the DC winding, another end of each of the plurality of coupled windings is connected to each intermediate connection point between a plurality of upper and lower arms composed of switching elements, and a control device for controlling the switching elements, wherein switching of the upper arms or the lower arms is controlled in accordance with a magnitude of a duty of the switching operation and a magnitude relationship between DC current ripple and AC current ripple composing current ripple in the coupled windings.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: December 10, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoshi Murakami, Yuta Komatsu, Ryosuke Kobayashi
  • Patent number: 9878060
    Abstract: Sterilization device, in particular for sterilization of packaging material, comprising a first chamber, a barrier element and a connection area. The first chamber is adapted to provide charge carriers for sterilization, and the connection area is connected to a third chamber so that the barrier element forms at least one part of the boundary of a volume in which a first atmosphere exists.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: January 30, 2018
    Assignee: TETRA LAVAL HOLDINGS & FINANCE S.A.
    Inventor: Håkan Mellbin
  • Patent number: 9859754
    Abstract: A computer-implemented method includes linking a plurality of load distribution points in a power distribution unit to a plurality of electrical loads in response to user input, receiving data indicative of one or more electrical parameters associated with the plurality of load distribution points, selecting a visual indicator from a group of indicators based on the one or more electrical parameters associated with the load distribution point for each of the plurality of load distribution points, and displaying the selected visual indicators for the plurality of load distribution points on a visual display for viewing by a user. Each of the electrical loads are electrically coupled to one or more of the plurality of load distribution points. Example computer systems and non-transitory computer readable medium including computer executable instructions for performing one or more computer-implemented methods are also disclosed.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: January 2, 2018
    Assignee: VERTIV ENERGY SYSTEMS, INC.
    Inventors: Carl Johan Henrik Nilén, Kjell Gunnar Lövqvist
  • Patent number: 9818525
    Abstract: In some embodiments, a cooling device of a power transformer is presented and, more particularly, to a cooling device of a power transformer which may include a heat pipe and a heat sink to improve cooling performance, and to attenuate noise by eliminating a cooling fan.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: November 14, 2017
    Assignee: LSIS CO., LTD.
    Inventor: Seong-Eon Kim
  • Patent number: 9679693
    Abstract: A seawater-based high resistance grounding device for a subsea transformer includes an insulated pipe mounted to the outside of the transformer so as to be exposed to seawater. The insulated pipe has two or more cylindrical metallic electrodes electrically connected to ground and to the neutral node of the secondary transformer windings. The volume of seawater within the pipe and between the electrodes provides one or more high resistance ground paths for protection of the transformer.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: June 13, 2017
    Assignee: OneSubsea IP UK Limited
    Inventors: Audun Magne Askeland, Asbjoern Diesen, Aage Hadler-Jacobsen
  • Patent number: 9601258
    Abstract: A multi-phase autotransformer (10) is disclosed. The exemplary transformer includes primary windings PWA, PWB, PWC) and secondary windings (SWA1-SWA4, SWB1-SWB4, SWC1-SWC4). The primary windings are connected in a delta configuration and to a three-phase input voltage source. Each secondary winding is electrically connected to a primary winding but is magnetically coupled to a different primary winding. Three sets of secondary windings provide three three-phase outputs (350A, 350B, 350C), each of which has a voltage which is less than the three-phase input voltage, the three-phase output of each set being phase-shifted with respect to the other sets. These three sets also, collectively, provide a multi-phase output (325). Another set of secondary windings, in conjunction with the input voltage, provides another multi-phase phase output (360) which has approximately the same voltage as the three-phase input voltage.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: March 21, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Jian Huang, Eugene V. Solodovnik, Kamiar J. Karimi
  • Patent number: 9472329
    Abstract: A high leakage inductance transformer core device, and method of forming same, that has a core made of tape wound material, at least one set of concentric primary and secondary windings, and at least one flux shunt between the primary and secondary windings which is also made of tape wound material. The transformer core and flux shunts are arranged so that the transformer has a low external magnetic field, and substantially no excess core losses due to principal core flux flowing from one part of the core structure to another through the broad surface of the core tape.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 18, 2016
    Inventor: Bruce W. Carsten
  • Patent number: 9379629
    Abstract: A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: June 28, 2016
    Assignee: Power Systems Technologies, Ltd.
    Inventor: Sriram Chandrasekaran
  • Patent number: 9270110
    Abstract: In one embodiment a fault current limiter comprises a current splitting reactor having interleaved windings to reduce an insertion impedance of the fault current limiter during non-fault conditions. The current splitting reactor having interleaved windings may include a first winding, the first winding including a plurality of sub-windings and a second winding, the second winding including a plurality of sub-windings, the sub-windings of the first winding and the sub-windings of the second winding wounds about the core and interleaved.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: February 23, 2016
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventor: Kasegn D. Tekletsadik
  • Patent number: 9058929
    Abstract: A boosting AC-to-DC converter may include a main rectifier, first and second auxiliary rectifiers, and an autotransformer. The autotransformer may include a plurality of winding assemblies each having a primary terminal connected to an AC power source, a main secondary terminal connected to the main rectifier, a first auxiliary secondary terminal connected to the first auxiliary rectifier, and a second auxiliary secondary terminal connected to the second auxiliary rectifier. Impedance between the primary terminal of each of the winding assemblies and the main rectifier is less than impedance between the primary terminal of each of the winding assemblies and either the first auxiliary rectifier or the second auxiliary rectifier. Impedance between the primary terminal of each of the first winding assemblies and the first auxiliary rectifier is different from impedance between the primary terminal of each of the winding assemblies and the second auxiliary rectifier.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: June 16, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Evgeni Ganev, William Warr, Keming Chen
  • Publication number: 20150145626
    Abstract: A three-phase transformer including a primary portion and a secondary portion, the primary portion including a first body made of ferromagnetic material and primary coils, the secondary portion including a second body made of ferromagnetic material and secondary coils, the first body defining a first annular slot of axis A and a second annular slot of axis A, the primary coils including a first toroidal coil of axis A in the first slot, a second toroidal coil of axis A in the second slot, and one or more third toroidal coils connected in series, the third coils being wound around one of the legs, and passing via slots in the leg.
    Type: Application
    Filed: May 3, 2013
    Publication date: May 28, 2015
    Applicant: HISPANO-SUIZA
    Inventor: Cedric Duval
  • Publication number: 20150137924
    Abstract: A three-phase transformer including a primary portion and a secondary portion, the primary portion including a first body made of ferromagnetic material and primary coils, the secondary portion including a second body made of ferromagnetic material and secondary coils, the first body defining a first annular slot of axis A and a second annular slot of axis A. The primary coils include a first toroidal coil of axis A in the first slot, a second toroidal coil of axis A in the first slot, a third toroidal coil of axis A in the second slot, and a fourth toroidal coil of axis A in the second slot, the second coil and the third coil being connected in series.
    Type: Application
    Filed: May 3, 2013
    Publication date: May 21, 2015
    Applicant: LABINAL POWER SYSTEMS
    Inventor: Cedric Duval
  • Patent number: 9013258
    Abstract: A rectifier transformer including at least one secondary with windings, one pair of magnetic transductors per winding, one of the transductors having one or more first busbars and the other having one or more second busbars. All of the busbars of the pair of transductors are connected to the same winding. The or each first or second, busbar is connected to a single positive or negative, terminal (2w+) designed to be connected to a positive or negative, arm of the rectifier. All of the busbars of the pair of magnetic transductors form one or more groups that are encircled by at least one magnetic toroid and that comprise at least one first busbar and at least one second busbar, so that, when the terminals are short-circuited, the busbars of a group pass currents of opposite directions such that the sum of the currents in one direction is equal to the sum of the currents in the other direction.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: April 21, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Serge Tirilly, Triomphant Ngnegueu, David Marnay
  • Publication number: 20150102881
    Abstract: The invention concerns a magnetic core of a three-phase choke comprising a first, second and third magnetic leg for receiving a first, second and third electric winding respectively of a first, second and third electric phase respectively, wherein the first, second and third legs are arranged in a star or delta configuration.
    Type: Application
    Filed: April 24, 2013
    Publication date: April 16, 2015
    Inventor: Wojciech Giengiel
  • Patent number: 9007162
    Abstract: A “Y”-shaped transformer includes a “Y” shaped magnetic core that includes a top portion and a bottom portion. The top portion and the bottom portion both include a plurality of “Y”-shaped laminates stacked on top of one another and bent to form a plurality of core limbs. A plurality of input windings are wound around each of the plurality of core limbs. A plurality of output windings wound are wound around each of the plurality of core limbs.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 14, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Scott P. Wilkinson, James H. Clemmons
  • Patent number: 8988178
    Abstract: An inductive coupler assembly for use in a downhole environment and related methods are described. An example indicative coupler assembly includes a first inductive coupler having first and second magnetically coupled coils and a second inductive coupler having third and fourth magnetically coupled coils. The first and third coils are coupled to a first pair of signal lines and the second and fourth coils are coupled to a second pair of signal lines. The first inductive coupler is to magnetically convey a differential communications signal between the first and second pairs of signal lines, and the second inductive coupler is to magnetically convey a common mode power signal between the first and second pairs of signal lines.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: March 24, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Benoit Deville, Yann Dufour, Bernard G Juchereau, Christian Chouzenoux
  • Patent number: 8970338
    Abstract: A distribution transformer having a slot-and-tab core frame assembly. The core frame (17) encloses a transformer core (11) having at least one phase and provides compression on the core yokes and end members of the transformer to bind the assembly together. First and second clamps (10, 24) of the core frame contain receiving slots (34) for the tabbed (18, 28), longitudinal side supports (20), creating an interlock when connected. For larger transformers, the tabbed side supports may be alternatively comprised of a subassembly of end plates, cams, and tabbed locking plates, encompassing a sturdy locking mechanism.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: March 3, 2015
    Assignee: ABB Technology AG
    Inventor: Charles W. Johnson
  • 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
  • Publication number: 20140354386
    Abstract: Three-phase magnetic cores for magnetic induction devices (e.g., transformers, coils, chokes), and methods for manufacturing them, are disclosed. The magnetic cores are generally constructed from three generally rectangular magnetic core frames having a stair-stepped configuration extending along side portions of the frames. The frames are arranged to form a triangular prism structure such that side portions of locally adjacent frames are uniformly engaged to form three core legs over which coils of a three-phase magnetic induction device may be placed.
    Type: Application
    Filed: January 15, 2013
    Publication date: December 4, 2014
    Applicant: U.T.T. UNIQUE TRANSFORMER TECHNOLGIES LTD
    Inventors: Eliezer Adar, Yuri Bolotinsky
  • Patent number: 8890642
    Abstract: An integrated magnetic for a low harmonics three-phase bidirectional front-end and also for AC/DC and DC/AC power converters. Its use enables reduction of the harmonics of the currents absorbed or injected to three-phase power line by using only one device which integrates a splitter and an inductor function. Compared to known solutions, cost, material and dimensions of the integrated magnetic device are reduced thanks to the magnetic core comprising three closed sub-assemblies and one or more jokes, separated by air-gaps from the sub-assemblies.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: November 18, 2014
    Assignee: Schaffner EMV AG
    Inventor: Andrzej Pietkiewicz
  • Publication number: 20140292455
    Abstract: Either a reactor or a transformer includes two facing yoke cores, and a plurality of magnetic leg cores around which coils are wound and gap adjustment means are disposed. The two facing yoke cores are connected with the plurality of magnetic leg cores, and are provided with isotropic magnetic bodies on at least one of the connection parts. The isotropic magnetic bodies are formed from an isotropic magnetic material. A power conversion apparatus includes either the reactor or the transformer.
    Type: Application
    Filed: October 31, 2011
    Publication date: October 2, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Naoyuki Kurita, Kazumasa Ide
  • Publication number: 20140268896
    Abstract: A reactor apparatus 10 includes two yoke iron cores 11a, 11b disposed opposite each other, a plurality of magnetic leg iron cores 31 each of which has a coil 21 wound therearound and provided with a gap adjusting means 5a, 5b, and one or more zero-phase magnetic leg iron cores 41 around which a coil is not wound, wherein the two yoke iron cores 11a, 11b disposed opposite each other are connected to each other with the plurality of magnetic leg iron cores 31 and the one or more zero-phase magnetic leg iron cores 41. In addition, the reactor apparatus is used for a power converter.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 18, 2014
    Applicant: Hitachi Ltd.
    Inventors: Naoyuki Kurita, Kazumasa Ide, Shuji Katoh
  • Publication number: 20140266086
    Abstract: A coupled inductor includes a ladder magnetic core including two opposing rails extending in a lengthwise direction and joined by a plurality of rungs. The coupled inductor further includes a respective winding wound around each of the plurality of rungs. The plurality of rungs are divided into at least two groups of rungs, and a lengthwise separation distance between adjacent rungs in each group of rungs is less than a lengthwise separation distance between adjacent rungs of different groups of rungs.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Volterra Semiconductor Corporation
    Inventor: Alexandr Ikriannikov
  • Patent number: 8836462
    Abstract: An AC transformer having a cylindrical core configurable for single or polyphase power input and/or output transformer applications. The transformer core structure is capable of being configured to provide for single or polyphase inputs or outputs by varying the transformer primary and secondary winding configurations. A polyphase input configuration can be utilized in polyphase output transformers, such as for variable frequency drive (VFD) applications. Additional methods for winding transformer cores minimize the quantity of core winding wire necessary for transformer manufacture.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: September 16, 2014
    Assignee: Siemens Industry, Inc.
    Inventor: Radu Stefan Curiac
  • Publication number: 20140253271
    Abstract: The present invention relates to electrical transformers and, in particular, to improvements to efficiency in energy conversion in electrical transformers. The improved transformer has a bi-toroidal circuit topology in which the magnetic flux passing through the primary and secondary coils are different. The turns ratio displays an “effective magnification” like an impedance transformed by a feedback loop. The result is a transformer which displays virtually no primary input current increase from no-load to on-load and an on-load power factor of zero for a purely resistive load.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 11, 2014
    Inventor: Thane C. Heins
  • Patent number: 8810349
    Abstract: A power supply device comprising an advanced harmonic current quashing (AHQ) and current pulse multiplier (CPM) (AHQ/CPM) three-phase transformer having: a primary winding placed around a magnetic core and having three primary winding input leads to connect a three phase power supply; and a plurality of secondary windings placed around the magnetic core in a predetermined winding turns configuration to generate a plurality of three phase outputs, where each three phase output of the plurality of three phase outputs has a different phase angle from all other three phase outputs, with each unique phase angle associated with a three phase output of a corresponding secondary winding being determined based on the winding turns configuration utilized for the corresponding secondary winding. A variable frequency drive (VFD) having 3N converters/inverters coupled to the secondary windings outputs exhibit substantially reduced harmonic currents and a current pulse number of greater than 6N.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: August 19, 2014
    Assignee: Howard Industries, Inc.
    Inventor: Donald W. Owen
  • Publication number: 20140226387
    Abstract: A means is provided for the transmission of electric power that makes use of a coaxial cable and a special transformer for converting three-phase alternating current to single-phase current. The geometry of the transformer comprises a toroidal core with a chord passing through the axis. The primary is wound about the torus and the secondary about the chord.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 14, 2014
    Inventor: John E. Stauffer
  • Publication number: 20140218120
    Abstract: Coupled multi-inductors and their applications. An apparatus includes several circuit stages. Each circuit stage includes an inductive element that overlaps with the inductive elements of its adjacent circuit stages, forming a loop of coupled circuit stages. The apparatus may be, for example, a multi-phase oscillator with multiple oscillators that are magnetically coupled to each other for generating oscillation signals at different phases. The apparatus may also be, for example, a phase interpolator for combining input signals.
    Type: Application
    Filed: August 29, 2012
    Publication date: August 7, 2014
    Applicant: RAMBUS INC.
    Inventors: Mohammad Hekmat, Farshid Aryanfar, Kambiz Kaviani
  • Patent number: 8786390
    Abstract: A transformer of dry design is disclosed having a core composed of amorphous material, which is sensitive to mechanical loads, having at least one winding former which surrounds the core and is in each case formed from at least one primary winding and secondary winding, and having at least one holding apparatus. A method for transformer production is also disclosed, wherein the holding apparatus is used to fix the at least one primary winding and secondary winding in each case and for this purpose it acts on each of the end faces of the at least one winding former.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: July 22, 2014
    Assignee: ABB Technology AG
    Inventors: Michael Luckey, Wolfgang Mönig, Benjamin Weber, Karel Bilek, Martin Carlen, Jong-Yun Lim
  • Patent number: 8773231
    Abstract: A controllable inductor system includes a multiphase inductor comprising a central winding, a first control winding, and a second control winding, and a control portion comprising a first control logic portion operative to receive a signal indicative of a current of the first control winding and a signal indicative of a current of the sum of the first control winding and the second control winding and modulate a first pulse width modulated signal to responsively control a first transistor connected to the first control winding, and a second control logic portion operative to receive the signal indicative of the current of the first control winding and a signal indicative of a current of the sum of the first control winding and the second control winding and modulate a second pulse width modulated signal to responsively control a second transistor connected to the second control winding.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: July 8, 2014
    Assignee: Raytheon Company
    Inventors: Boris S. Jacobson, Edward Jung
  • Publication number: 20140167896
    Abstract: A coupled inductor includes a magnetic core, a first and a second coil. The magnetic core has a top and a bottom surface. The first coil, located in the magnetic core, has a first coil input end and a first coil output end, and is wound around a first axis in a first winding direction from the first coil input end and extended to the first coil output end. The second coil, located in the magnetic core, has a second coil input end and a second coil output end, and is wound around a second axis in a second winding direction, opposite to the first winding direction, from the second coil input end and extended to the second coil output end. An orthographic projection of the first coil on the top surface is at least partially overlapped with that of the second coil on the top surface.
    Type: Application
    Filed: May 2, 2013
    Publication date: June 19, 2014
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventor: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUDE
  • Patent number: 8729998
    Abstract: A three step non-linear transformer core is formed from three sections of laminations each having different widths and cross-sectional areas. A first section of laminations is formed by cross-slitting a generally rectangular sheet or strip of metal. A resulting generally triangular segment is then wound upon a mold to form a first section of a core frame having a trapezoidal cross section. A second section of laminations is wound upon the first section of laminations to form a segment of a core frame having a rhombic cross section. The third section of laminations is wound upon the second section of laminations to form a segment of a core frame having a trapezoidal cross section. Each of the first, second, and third sections of laminations are offset from one another by a predetermined angle of offset.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: May 20, 2014
    Assignee: ABB Technology
    Inventors: Samuel S. Outten, Thomas A. Hartmann
  • Publication number: 20140118099
    Abstract: An encapsulated delta transformer for medium to high voltages includes a hermetically sealed housing that encloses a volume, a delta shaped transformer arranged in the housing, and a passageway for a fluid. The passageway protruding through the housing and the volume enclosed by the passageway is in fluidal connection to an outside of the housing.
    Type: Application
    Filed: January 7, 2014
    Publication date: May 1, 2014
    Applicant: ABB RESEARCH LTD
    Inventors: Jasmin SMAJIC, Arthouros Iordanidis, Bernardo Galletti, Thorsten Steinmetz, Bernhard Petermeier
  • Patent number: 8698584
    Abstract: An integrated magnetic device for low harmonics three-phase front-end (1) comprising three magnetic sub-assemblies (30), wherein each magnetic sub-assembly (30) comprises a magnetic core without air-gaps, three or more wound limbs and at least five windings, three current inputs connectable to a three-phase power grid (100), at least nine current outputs, three for each current inputs, said current outputs being galvanically connected to said three current inputs and connectable to a load (200). The integrated magnetic device is designed for a low harmonics three-phase bidirectional front-end and also for AC/DC rectifier and DC/AC power inverters. Its use enables reduction of the harmonics of the currents absorbed or injected to three-phase power line by using only one device which integrates a splitter and an inductor function. Compared to known solutions, cost, material and dimensions of the integrated magnetic device are reduced.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: April 15, 2014
    Assignee: Schaffner EMV AG
    Inventor: Andrzej Pietkiewicz
  • Patent number: 8659382
    Abstract: A non-encapsulated-winding stereo wound-core dry-type amorphous alloy transformer. The core of the transformer has a stereo structure. Three lower yokes are placed on a base of a lower clamp, and an upper clamp and the lower clamp are connected with each other by several press screws. Low-voltage windings include a foil-wound or wire-wound cylindrical structure, while its high-voltage windings are wound with oxygen-free copper wires wrapped in an insulate paper and processed through vacuum pressure impregnation. Upper and lower padding blocks support and compress the high-voltage and low-voltage windings, so that the product is formed in a rigid stereo frame structure.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: February 25, 2014
    Assignee: Guangdong Haihong Co., Ltd.
    Inventors: Kaixuan Xu, Xianqing Guo
  • Publication number: 20140049246
    Abstract: Power supply arrangement with first transformer (T1), having transformer core (K) with legs (K1) and yokes (K2) connecting these legs. Legs (K1) and yokes (K2) are arranged in geometric shape of a cylinder. The cylinder has first polygon as base surface and second polygon as surface opposite. The yokes (K2) are arranged along edges of first polygon and along edges of second polygon. Legs (K1) are arranged along edges of an outer surface of the cylinder. Primary windings and secondary windings (T1.1, T1.2, T1.3) arranged on legs (K1) of the transformer core. Secondary windings (T1.1, T1.2, T1.3) have three terminals (A), including a neutral conductor terminal and two phase conductor terminals. Phase conductor terminals of the secondary windings (T1.1, T1.2, T1.3) are mechanically and electrically connected to a first electrically conductive support (L), having an outer end, the outer end of the first carrier (L) are located outside the cylinder.
    Type: Application
    Filed: February 12, 2013
    Publication date: February 20, 2014
    Applicant: AEG POWER SOLUTIONS B.V.
    Inventors: Gladwyn De Vidts, Peter Wallmeier, Christian Ferber
  • Patent number: 8653929
    Abstract: A stereo-triangular wound-core power transformer with a voltage class more than or equal to 110 kV is disclosed, which includes a stereo-triangle wound-core and windings, wherein the core includes iron yokes and core pillars which are arranged in a stereo-triangle shape, with every two adjacent core pillars connected through an iron yoke. The power transformer further includes angle rings, end rings, insulating end rings, insulating end plates and a frame-type clamp, wherein the angle rings, insulating end rings, end rings and insulating end rings are arranged at both ends of the core pillars in sequence, respectively, and the ends of the core pillars are arranged on the insulating end plates. The frame-type clamp covers the iron yokes, and the supporting boards of the frame-type clamp are connected with the insulating end plates through pressing screws.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: February 18, 2014
    Assignee: Guangdong Hai Hong Co., Ltd.
    Inventor: Kaixuan Xu