Polyphase Patents (Class 336/5)
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Patent number: 11967453Abstract: An apparatus includes a primary transformer circuit including a plurality of primary coils. The apparatus further includes a delta secondary transformer circuit configured to magnetically couple to the primary transformer circuit. The delta secondary transformer circuit includes a first plurality of secondary coils, a first plurality of nodes coupled to the first plurality of secondary coils, and a second plurality of secondary coils configured to magnetically couple to the plurality of primary coils. Each coil of the second plurality of secondary coils is physically coupled to a respective node of the first plurality of nodes.Type: GrantFiled: April 17, 2019Date of Patent: April 23, 2024Assignee: THE BOEING COMPANYInventor: Jian Huang
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Patent number: 11764776Abstract: A drive circuit configured to drive a load. The drive circuit comprises a transformer. The transformer comprises a transformer primary comprising one or more primary windings connected to arms that pass through a magnetic material. The transformer also comprises a transformer secondary comprising secondary windings connected to planar secondary conductors which pass through the inside of the arms. The drive circuit also comprises a voltage source configured to apply a voltage across the transformer primary.Type: GrantFiled: September 30, 2020Date of Patent: September 19, 2023Assignee: Sweven Design Ltd.Inventor: Robert William Gwynne
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Patent number: 11120939Abstract: 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: GrantFiled: September 30, 2019Date of Patent: September 14, 2021Assignee: The Boeing CompanyInventor: Jian Huang
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Patent number: 11056260Abstract: 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: GrantFiled: January 21, 2020Date of Patent: July 6, 2021Assignee: Fanuc CorporationInventor: Masatomo Shirouzu
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Patent number: 11004590Abstract: 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: GrantFiled: March 4, 2020Date of Patent: May 11, 2021Assignee: Fanuc CorporationInventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
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Patent number: 10978243Abstract: 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: GrantFiled: March 7, 2017Date of Patent: April 13, 2021Assignee: TOKUDEN CO., LTD.Inventors: Toru Tonomura, Sachio Tamaki, Yasuhiro Fujimoto
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Patent number: 10818423Abstract: 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: GrantFiled: June 26, 2018Date of Patent: October 27, 2020Assignee: Fanuc CorporationInventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
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Patent number: 10790084Abstract: 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: GrantFiled: January 25, 2018Date of Patent: September 29, 2020Assignee: Fanuc CorporationInventors: Takafumi Kajiya, Hisashi Maeda
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Patent number: 10770218Abstract: 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: GrantFiled: February 7, 2018Date of Patent: September 8, 2020Assignee: Fanuc CorporationInventors: Kenichi Tsukada, Masatomo Shirouzu
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Patent number: 10763030Abstract: 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: GrantFiled: August 26, 2016Date of Patent: September 1, 2020Assignee: ABB Power Grids Switzerland AGInventors: Charlie Sarver, William E. Pauley
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Patent number: 10734154Abstract: 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: GrantFiled: June 25, 2018Date of Patent: August 4, 2020Assignee: FANUC CORPORATIONInventor: Masatomo Shirouzu
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Patent number: 10665384Abstract: 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: GrantFiled: July 30, 2018Date of Patent: May 26, 2020Assignee: THALESInventors: Mathieu Mairie, Frederic Lacaux, Remy Biaujaud
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Patent number: 10650956Abstract: 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: GrantFiled: June 5, 2018Date of Patent: May 12, 2020Assignee: FANUC CORPORATIONInventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
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Patent number: 10650954Abstract: 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: GrantFiled: September 13, 2017Date of Patent: May 12, 2020Assignee: ENERGO GROUP CANADA INC.Inventors: Dragan Lemez, Aleksander Lemez
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Patent number: 10537938Abstract: 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: GrantFiled: September 17, 2015Date of Patent: January 21, 2020Assignee: NTN CORPORATIONInventors: Takuji Harano, Hiroyuki Noda
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Patent number: 10505459Abstract: 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: GrantFiled: December 22, 2016Date of Patent: December 10, 2019Assignee: Mitsubishi Electric CorporationInventors: Satoshi Murakami, Yuta Komatsu, Ryosuke Kobayashi
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Patent number: 9878060Abstract: 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: GrantFiled: January 21, 2015Date of Patent: January 30, 2018Assignee: TETRA LAVAL HOLDINGS & FINANCE S.A.Inventor: Håkan Mellbin
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Patent number: 9859754Abstract: 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: GrantFiled: May 8, 2014Date of Patent: January 2, 2018Assignee: VERTIV ENERGY SYSTEMS, INC.Inventors: Carl Johan Henrik Nilén, Kjell Gunnar Lövqvist
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Patent number: 9818525Abstract: 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: GrantFiled: June 16, 2016Date of Patent: November 14, 2017Assignee: LSIS CO., LTD.Inventor: Seong-Eon Kim
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Patent number: 9679693Abstract: 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: GrantFiled: February 25, 2015Date of Patent: June 13, 2017Assignee: OneSubsea IP UK LimitedInventors: Audun Magne Askeland, Asbjoern Diesen, Aage Hadler-Jacobsen
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Patent number: 9601258Abstract: 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: GrantFiled: July 11, 2014Date of Patent: March 21, 2017Assignee: THE BOEING COMPANYInventors: Jian Huang, Eugene V. Solodovnik, Kamiar J. Karimi
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Patent number: 9472329Abstract: 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: GrantFiled: August 15, 2012Date of Patent: October 18, 2016Inventor: Bruce W. Carsten
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Patent number: 9379629Abstract: 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: GrantFiled: July 16, 2012Date of Patent: June 28, 2016Assignee: Power Systems Technologies, Ltd.Inventor: Sriram Chandrasekaran
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Patent number: 9270110Abstract: 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: GrantFiled: December 10, 2013Date of Patent: February 23, 2016Assignee: Varian Semiconductor Equipment Associates, Inc.Inventor: Kasegn D. Tekletsadik
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Patent number: 9058929Abstract: 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: GrantFiled: July 10, 2013Date of Patent: June 16, 2015Assignee: HONEYWELL INTERNATIONAL INC.Inventors: Evgeni Ganev, William Warr, Keming Chen
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Publication number: 20150145626Abstract: 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: ApplicationFiled: May 3, 2013Publication date: May 28, 2015Applicant: HISPANO-SUIZAInventor: Cedric Duval
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Publication number: 20150137924Abstract: 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: ApplicationFiled: May 3, 2013Publication date: May 21, 2015Applicant: LABINAL POWER SYSTEMSInventor: Cedric Duval
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Patent number: 9013258Abstract: 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: GrantFiled: December 27, 2011Date of Patent: April 21, 2015Assignee: ALSTOM Technology LtdInventors: Serge Tirilly, Triomphant Ngnegueu, David Marnay
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Publication number: 20150102881Abstract: 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: ApplicationFiled: April 24, 2013Publication date: April 16, 2015Inventor: Wojciech Giengiel
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Patent number: 9007162Abstract: 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: GrantFiled: September 27, 2012Date of Patent: April 14, 2015Assignee: Hamilton Sundstrand CorporationInventors: Scott P. Wilkinson, James H. Clemmons
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Patent number: 8988178Abstract: 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: GrantFiled: July 1, 2011Date of Patent: March 24, 2015Assignee: Schlumberger Technology CorporationInventors: Benoit Deville, Yann Dufour, Bernard G Juchereau, Christian Chouzenoux
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Patent number: 8970338Abstract: 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: GrantFiled: January 24, 2012Date of Patent: March 3, 2015Assignee: ABB Technology AGInventor: Charles W. Johnson
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Patent number: 8963677Abstract: 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: GrantFiled: October 31, 2011Date of Patent: February 24, 2015Assignee: Haihong Electric Co., Ltd.Inventors: Kaixuan Xu, Xianqing Guo
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Publication number: 20140354386Abstract: 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: ApplicationFiled: January 15, 2013Publication date: December 4, 2014Applicant: U.T.T. UNIQUE TRANSFORMER TECHNOLGIES LTDInventors: Eliezer Adar, Yuri Bolotinsky
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Patent number: 8890642Abstract: 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: GrantFiled: November 2, 2012Date of Patent: November 18, 2014Assignee: Schaffner EMV AGInventor: Andrzej Pietkiewicz
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Publication number: 20140292455Abstract: 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: ApplicationFiled: October 31, 2011Publication date: October 2, 2014Applicant: Hitachi, Ltd.Inventors: Naoyuki Kurita, Kazumasa Ide
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Publication number: 20140268896Abstract: 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: ApplicationFiled: May 16, 2011Publication date: September 18, 2014Applicant: Hitachi Ltd.Inventors: Naoyuki Kurita, Kazumasa Ide, Shuji Katoh
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Publication number: 20140266086Abstract: 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: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: Volterra Semiconductor CorporationInventor: Alexandr Ikriannikov
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Patent number: 8836462Abstract: 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: GrantFiled: March 22, 2011Date of Patent: September 16, 2014Assignee: Siemens Industry, Inc.Inventor: Radu Stefan Curiac
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Publication number: 20140253271Abstract: 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: ApplicationFiled: March 6, 2014Publication date: September 11, 2014Inventor: Thane C. Heins
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Patent number: 8810349Abstract: 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: GrantFiled: February 1, 2011Date of Patent: August 19, 2014Assignee: Howard Industries, Inc.Inventor: Donald W. Owen
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Publication number: 20140226387Abstract: 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: ApplicationFiled: February 8, 2013Publication date: August 14, 2014Inventor: John E. Stauffer
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Publication number: 20140218120Abstract: 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: ApplicationFiled: August 29, 2012Publication date: August 7, 2014Applicant: RAMBUS INC.Inventors: Mohammad Hekmat, Farshid Aryanfar, Kambiz Kaviani
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Patent number: 8786390Abstract: 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: GrantFiled: September 29, 2011Date of Patent: July 22, 2014Assignee: ABB Technology AGInventors: Michael Luckey, Wolfgang Mönig, Benjamin Weber, Karel Bilek, Martin Carlen, Jong-Yun Lim
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Patent number: 8773231Abstract: 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: GrantFiled: March 9, 2012Date of Patent: July 8, 2014Assignee: Raytheon CompanyInventors: Boris S. Jacobson, Edward Jung
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Publication number: 20140167896Abstract: 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: ApplicationFiled: May 2, 2013Publication date: June 19, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventor: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUDE
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Patent number: 8729998Abstract: 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: GrantFiled: June 6, 2012Date of Patent: May 20, 2014Assignee: ABB TechnologyInventors: Samuel S. Outten, Thomas A. Hartmann
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Publication number: 20140118099Abstract: 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: ApplicationFiled: January 7, 2014Publication date: May 1, 2014Applicant: ABB RESEARCH LTDInventors: Jasmin SMAJIC, Arthouros Iordanidis, Bernardo Galletti, Thorsten Steinmetz, Bernhard Petermeier
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Patent number: 8698584Abstract: 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: GrantFiled: November 2, 2012Date of Patent: April 15, 2014Assignee: Schaffner EMV AGInventor: Andrzej Pietkiewicz
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Patent number: 8659382Abstract: 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: GrantFiled: October 31, 2011Date of Patent: February 25, 2014Assignee: Guangdong Haihong Co., Ltd.Inventors: Kaixuan Xu, Xianqing Guo