Interconnected Windings Patents (Class 336/12)
  • Patent number: 10734153
    Abstract: A three-phase reactor includes: a central iron core; an outer peripheral iron core surrounding the central iron core; and at least three connecting units that magnetically connect the central iron core and the outer peripheral iron core to each other, in which each of the connecting units includes at least one connecting iron core, at least one coil wound around the connecting iron core, and at least one gap.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 4, 2020
    Assignee: FANUC CORPORATION
    Inventors: Takuya Maeda, Masatomo Shirouzu
  • Patent number: 10726989
    Abstract: A power transmission coil device includes a first helical coil having a first conductive wire forming a helical shape around an axis, and a second helical coil having a second conductive wire forming a helical shape around the axis, in which the first helical coil is electrically connected in parallel to the second helical coil, and the first conductive wire and the second conductive wire arranged along a direction of the axis.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: July 28, 2020
    Assignee: IHI Corporation
    Inventors: Kentarou Furiya, Susumu Tokura, Kenji Nishimura, Jun Araki, Hideki Nagano
  • Patent number: 10395819
    Abstract: A multiphase DC/DC power converter includes a magnetic core having a plurality of core sections and defining a plurality of magnetic flux paths, and a plurality of winding including a plurality of transformer winding sets and a plurality of inductor windings. Each transformer winding set includes a primary winding and a secondary winding wound about at least one core section of the plurality of core sections. Each inductor winding is wound about another core section of the plurality of core sections. Magnetic flux generated by one transformer winding set of the plurality of transformer winding sets substantially cancels magnetic flux generated by at least one adjacent transformer winding set of the plurality of transformer winding sets. Magnetic flux generated by one inductor winding of the plurality of inductor windings substantially cancels magnetic flux generated by at least one adjacent inductor winding of the plurality of inductor windings.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 27, 2019
    Assignee: Astec International Limited
    Inventors: Matthias Wukovits, Edin Ramic, Klaus Riedmueller, Michele Nobile
  • Patent number: 9514873
    Abstract: Disclosed herein is a choke coil including: a core composed of first and second legs, a first flat plate connecting an upper end portion of the first leg and that of the second leg, and a second flat plate connecting a lower end portion of the first leg and that of the second leg; a primary coil wound around the first leg; and a secondary coil wound around the second leg, wherein a width of at least any one of the first flat plate and the second flat plate is greater than widths of the first leg and the second leg.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: December 6, 2016
    Assignee: SOLUM CO., LTD
    Inventors: Seung Wan Yu, Hee Seung Kim, Jae Sun Won, Young Min Lee, Seung Ho Han, Hwa Hun Chin
  • Patent number: 9509135
    Abstract: A fault current limiter is provided that comprises a magnetically saturable core. The first core includes a first leg, a second leg, with a first AC coil wound on the second leg, a third leg, with a second AC coil wound around the third leg, the first and second AC coils being wound in series and connected to a first phase AC source, and a fourth leg. The first magnetic biasing unit is arranged to produce a first closed magnetic circuit in the first leg and the second leg that has a first flux direction, and the second coil is arranged to produce a second closed magnetic circuit in the fourth leg and the third leg that has a second flux direction, wherein the first flux direction opposes the second flux direction. The first and second AC coils are arranged to produce a first closed AC magnetic circuit in the second and third legs in an AC flux direction that alternates with each AC half-cycle.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: November 29, 2016
    Assignee: GRIDON LTD.
    Inventors: Robert Wilson, Mohinder Pannu
  • Patent number: 9336943
    Abstract: A transformer includes a magnetic core, a primary winding, and a plurality of secondary windings. The magnetic core has an axial and a radial direction. The primary winding includes a plurality of winding sections and at least one connecting section. The winding sections are arranged along the axial direction. The connecting section is connected between the two adjacent winding sections. Each of the winding sections includes a plurality of primary winding layers and pull-out portions. The primary winding layers surround the magnetic core and are arranged along the radial direction. One pull-out portion connects two primary winding layers adjacent to the pull-out portion. Part of normal projections of the primary winding layers on a surface of the magnetic core are located between normal projections of the pull-out portions on the surface of the magnetic core. The secondary windings surround the primary winding.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: May 10, 2016
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Jiang Chu, Wei Zhang, Zhi Huang
  • Publication number: 20150028844
    Abstract: The invention relates to a coupling device (4) for four phases of a multi-phase converter (2). Said coupling device (4) includes four coupling modules (6, 8, 12, 14), each of which encompasses four parallel through-holes. At least one section of a conductor loop (18, 20, 22, 24) for a phase. At least one section of a conductor loop (18, 20, 22, 24) for a phase penetrates a through-hole of a coupling module (6, 8, 12, 14), sections of conductor loops (18, 20, 22, 24) for at least two phases penetrating all four through-holes of a coupling module (6, 8, 12, 14).
    Type: Application
    Filed: February 20, 2013
    Publication date: January 29, 2015
    Applicant: Robert Bosch GmbH
    Inventors: Mirko Schinzel, Nils Draese
  • Publication number: 20140333399
    Abstract: An electrical generator including a ring shaped coil and a plurality of magnets attached to the ring shaped coil. The magnets may be operatively connected to a power supply. A controller may be connected to the power supply to turn the magnets on and off. The magnets may be turned on and off sequentially around the ring shaped coil to generate electricity.
    Type: Application
    Filed: May 8, 2013
    Publication date: November 13, 2014
    Inventor: Franklin Limberg
  • 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: 20140145519
    Abstract: An energy-saving device (1) inserted between a three-phase power supply (A) and a three-phase load (L), includes a three-phase electrical transformer (10), each phase of which includes a transformation assembly (11) with a primary winding (2) connected at a first end (5) to one phase of the power supply (A) and electromagnetically coupled to a secondary winding (3) connected at its second end (S1) to one phase of the load (L). The device (1) involves the second ends (6) of the primary windings (2) in each of the transformation assemblies (11), lying opposite the first ends (5), being electrically connected to one another by a first switch (4). The device (1) also involves each of the secondary windings (3) being connected in parallel to a second switch (7) for enabling or disabling the operation of the energy-saving device (1) between the power source (A) and the load (L).
    Type: Application
    Filed: August 1, 2011
    Publication date: May 29, 2014
    Applicant: ENERGIA EUROPA S.P.A.
    Inventor: Ernesto D'Antuono
  • Publication number: 20140104025
    Abstract: A high frequency transformer with high conversion efficiency is provided. The high frequency transformer includes a first coil assembly 1 formed from a single flat wire, with first coils 1A that are configured by winding the flat wire edgewise plural times and that are formed at specific intervals, and a second coil assembly 2 formed from a single flat wire, with second coils 2A that are configured by winding the flat wire edgewise plural times and that are formed at specific intervals.
    Type: Application
    Filed: May 16, 2012
    Publication date: April 17, 2014
    Applicant: SEIDEN MFG. CO., LTD.
    Inventors: Tsunehiko Honna, Minoru Ishikawa
  • 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: 8497755
    Abstract: The present invention provides a hybrid transformer. In a transformer comprising a primary core and a secondary coil, the hybrid transformer includes a core with a 1st leg, a 2nd leg, and a 3rd leg; and a secondary coil with a 1st winding, a 2nd winding and a 3rd winding, which are wound zigzag on said 1st leg, said 2nd leg, and said 3rd leg. Two types of windings selected from the group consisting of said 1st winding, said 2nd winding and said 3rd winding are wound alternatively on said 1st leg, said 2nd leg, and said 3rd leg, respectively. However, the two types of windings wound on said 1st leg, said 2nd leg, and said 3rd leg, respectively, are wound in an overlapping manner around said core in the winding order.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: July 30, 2013
    Inventor: Hoon-Yang Park
  • Publication number: 20130127434
    Abstract: A coupled inductor array includes a magnetic core and N windings, where N is an integer greater than one. The magnetic core has opposing first and second sides, and a linear separation distance between the first and second sides defines a length of the magnetic core. The N windings pass at least partially through the magnetic core in the lengthwise direction, and each of the N windings forms a loop in the magnetic core around a respective winding axis. Each winding axis is generally perpendicular to the lengthwise direction and parallel to but offset from each other winding axis. Each winding has opposing first and second ends extending towards at least the first and second sides of the magnetic core, respectively. One possible application of the coupled inductor array is in a multi-phase switching power converter.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 23, 2013
    Inventor: Alexandr Ikriannikov
  • Publication number: 20130083574
    Abstract: A dual-input nine-phase autotransformer converts first and second three-phase AC inputs to a nine-phase AC output. The autotransformer includes input terminals for connection to a first three-phase AC input and a second three-phase AC input smaller than the first three-phase AC input. The autotransformer includes a first plurality of coils, a second plurality, and a third plurality of coils wound on respective phase legs of the autotransformer. The autotransformer includes a plurality of output terminals for providing a plurality of AC output voltages, and a plurality of internal terminals for connecting the first, second, and third plurality of coils in a configuration that provides a 40┬░ phase shift in the AC outputs provided by the dual-input nine-phase autotransformer.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Frank Z. Feng, Mustansir Kheraluwala, Waleed M. Said, John Huss
  • Publication number: 20120242261
    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 configuratons. 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: Application
    Filed: March 22, 2011
    Publication date: September 27, 2012
    Applicant: SIEMENS INDUSTRY, INC.
    Inventor: Radu Stefan Curiac
  • Patent number: 8274349
    Abstract: A tap-switching autotransformer for regulating the voltage supplied to a facility includes an electronics sub-assembly for controlling switching of the taps. The electronics sub-assembly and the windings are contained in a housing from which the electronics sub-assembly may be removed for repair or replacement. The electronics sub-assembly is adapted to enable an electronically actuated switch to short-circuit two of the taps. A mechanical switch enables a separate short-circuit to be maintained between the taps to enable the electronics sub-assembly to be safely removed from the housing.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: September 25, 2012
    Assignee: LPSI (Barbados) Ltd.
    Inventors: Albert W. Dunford, William G. Dunford, Colm E. Gallen, Daniel J. Harvey
  • Patent number: 8013703
    Abstract: A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: September 6, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Satoshi Hashino, Masao Nagano, Mitsuaki Hirakawa
  • Patent number: 8013702
    Abstract: A versatile distribution transformer having an electromagnetic transformer and a power electronic module is provided. A pocket having connectors electrically connected to at least one winding structure of the electromagnetic transformer is mounted above the electromagnetic transformer. The power electronic module is removably mounted in a cavity of the pocket. The power electronic module includes a plurality of semiconductor switching devices and a plurality of connectors adapted to slidably engage the connectors of the pocket. The power electronic module is movable between a removed position, wherein the power electronic module is located outside the pocket, and an installed position, wherein the power electronic module is disposed in the cavity of the pocket and the connectors of the power electronic module engage the connectors of the pocket so as to electrically connect the power electronic module to the at least one winding structure.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: September 6, 2011
    Assignee: ABB Research Ltd.
    Inventors: Mohamed Y. Haj-Maharsi, Thomas J. Lanoue
  • Patent number: 8009003
    Abstract: A method for powering a magnetic coupler, in which: a) each winding of a first magnetic elementary cell is powered such as to produce a magnetizing flux in a bar of the first cell which is joined with a second cell, the fundamental component of which has an angular offset xi; and b) powering each winding of the second cell such as to produce a magnetizing flux in the bar of the second cell which is joined with the first cell, the fundamental component of which has an angular offset xj. The absolute value of the difference between the angular offsets xi and xj is greater than or equal to (I) rad.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: August 30, 2011
    Assignees: Centre National de la Recherche Scientifique (C.N.R.S.), Institut National Polytechnique de Toulouse, University Montpellier 2, Sciences et Techniques
    Inventors: Eric Laboure, Thierry Antoine Meynard, Fran├žois Forest
  • Patent number: 7990242
    Abstract: Different configurations of transient voltage quashing (TQ) transformers, harmonic current quashing (HQ) transformers, and transient voltage and harmonic current quashing (THQ) transformers include one or more of: a tertiary winding radially placed between the primary and secondary windings, with a surge suppressors coupled thereto, which quashes transient voltages in the transformer and any output device attached to output leads of the tertiary or secondary windings; and an arrangement of the secondary windings, separated by at least a second type intra-winding insulation, into one or a plurality of output winding groups, each used to provide power to N serially-connected output devices that exhibit known/expected output voltage characteristics.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: August 2, 2011
    Assignee: Howard Industries, Inc.
    Inventor: Donald W. Owen
  • Publication number: 20110148556
    Abstract: The present invention relates to a power quality improvement device. The power quality improvement device is provided in the form of an autotransformer which comprises an iron core having first, second and third legs, and first, second and third coils which are wound in a zigzag fashion around said first, second and third legs. At least two coils selected from the group that includes said first, second and third coils, alternatively wound around each of said first, second and third legs, are over-lappingly wound around the core in a winding sequence.
    Type: Application
    Filed: September 16, 2009
    Publication date: June 23, 2011
    Inventor: Hoon-Yang Park
  • Publication number: 20110115590
    Abstract: The present invention provides a hybrid transformer. In a transformer comprising a primary core and a secondary coil, the hybrid transformer includes a core with a 1st leg, a 2nd leg, and a 3rd leg; and a secondary coil with a 1st winding, a 2nd winding and a 3rd winding, which are wound zigzag on said 1st leg, said 2nd leg, and said 3rd leg. Two types of windings selected from the group consisting of said 1st winding, said 2nd winding and said 3rd winding are wound alternatively on said 1st leg, said 2nd leg, and said 3rd leg, respectively. However, the two types of windings wound on said 1st leg, said 2nd leg, and said 3rd leg, respectively, are wound in an overlapping manner around said core in the winding order.
    Type: Application
    Filed: July 23, 2009
    Publication date: May 19, 2011
    Inventor: Hoon-Yang Park
  • Publication number: 20110109412
    Abstract: In a three phase wound transformer core three frames are connected in triangular fashion, each frame being made of multiple rings wound in off-set fashion on a common axis.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 12, 2011
    Inventor: Jurgen Klaus Vollrath
  • Patent number: 7880575
    Abstract: A transformer having high and low voltage coils mounted to legs of a core is provided. Each low voltage coil includes conductor sheeting having opposing first and second ends and opposing first and second side edges. A pair of coil bus bars is provided for each low voltage coil. Each coil bus bar has first and second portions, wherein the first portion has a width that is more than one and a half times greater than a width of the second portion. Each coil bus bar is secured to the conductor sheeting of its low voltage coil such that the first portion of the coil bus bar is disposed at the first side edge of the conductor sheeting and the second portion of the coil bus bar is disposed at the second side edge of the conductor sheeting.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: February 1, 2011
    Assignee: ABB Technology AG
    Inventors: Randall Farmer, Charlie Sarver
  • Publication number: 20100315187
    Abstract: A method for powering a magnetic coupler, in which: a) each winding of a first magnetic elementary cell is powered such as to produce a magnetizing flux in a bar of the first cell which is joined with a second cell, the fundamental component of which has an angular offset xi; and b) powering each winding of the second cell such as to produce a magnetizing flux in the bar of the second cell which is joined with the first cell, the fundamental component of which has an angular offset xj. The absolute value of the difference between the angular offsets xi and xj is greater than or equal to (I) rad.
    Type: Application
    Filed: October 22, 2007
    Publication date: December 16, 2010
    Applicant: INSTITUT NATIONAL POLYTECHNIQUE DE TOULOUSE
    Inventors: Eric Laboure, Thierry Antoine Meynard, Francois Forest
  • Patent number: 7796003
    Abstract: A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: September 14, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Satoshi Hashino, Masao Nagano, Mitsuaki Hirakawa
  • Publication number: 20100219923
    Abstract: A transformer includes a zigzag transformer comprising first, second and third magnetic cores. The transformer further includes an auxiliary winding set comprising respective pairs of series-connected windings on respective pairs of the first, second and third magnetic cores, the pairs of series-connected windings having respective first terminals connected to respective AC phases of the zigzag autotransformer and respective second terminals configured to provide respective AC output phases.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 2, 2010
    Inventor: Robert William Johnson, JR.
  • Patent number: 7772954
    Abstract: Various embodiments of multi-phase transformers are disclosed. For example, a transformer includes primary windings, secondary windings and third windings. Primary windings, secondary windings and third windings may include sub windings coupled to form junctions. Primary windings are coupled at ends to form a delta configuration. Secondary windings are coupled to primary windings. Third windings are coupled to primary windings and secondary windings. Secondary windings and the third windings may be magnetically coupled to primary windings. The outputs at second ends of third windings are greater than the outputs at the second ends of secondary windings. In some embodiments, the outputs at adjacent second ends of the third windings are substantially equal. In other embodiments, a phase angle difference of outputs at adjacent second ends of third windings is substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of secondary windings is substantially equal.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: August 10, 2010
    Assignee: The Boeing Company
    Inventors: Jian Huang, Jeffrey J. White
  • Patent number: 7772953
    Abstract: Various embodiments of multi-phase transformers are disclosed. Exemplary transformer includes primary windings, secondary windings and third windings. Primary windings, secondary windings and third windings may include sub windings coupled to form functions. Primary windings are coupled at ends to form a delta configurations. Secondary windings are coupled to primary windings. Third windings are coupled to primary windings and secondary windings. Secondary windings and the third windings are magnetically coupled to primary windings. The outputs at second ends of third windings are greater than the outputs at the second ends of secondary windings. In some embodiments, the outputs at adjacent second ends of the third windings are substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of third windings are substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of secondary windings are substantial equal.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: August 10, 2010
    Assignee: The Boeing Company
    Inventors: Jian Huang, Jeffrey J. White
  • Patent number: 7752735
    Abstract: The invention is directed to a transformer and a method of manufacturing the same. The transformer has high and low voltage coils mounted to legs of a core. Each low voltage coil includes conductor sheeting having opposing first and second ends and opposing first and second side edges. A pair of coil bus bars is provided for each low voltage coil. Each coil bus bar has first and second portions, wherein the first portion has a width that is more than one and a half times greater than a width of the second portion. Each coil bus bar is secured to the conductor sheeting of its low voltage coil such that the first portion of the coil bus bar is disposed at the first side edge of the conductor sheeting and the second portion of the coil bus bar is disposed at the second side edge of the conductor sheeting.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: July 13, 2010
    Assignee: ABB Technology AG
    Inventors: Randall Farmer, Charlie Sarver
  • Patent number: 7750782
    Abstract: A polygon connected three-phase autotransformer using six windings per phase provides a reduced power rating nine-phase power source suitable for 18-pulse AC to DC power converters. The windings are selected and connected in a manner that controls harmonic currents and minimizes total kVA rating. When the autotransformer is used to power a nine-phase AC to DC converter its kVA rating is typically less than 48% of the DC load kW. Additional isolated windings can provide means for the invention to operate as an efficient double-wound transformer.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: July 6, 2010
    Inventor: Derek Albert Paice
  • Publication number: 20100148899
    Abstract: Various embodiments of multi-phase transformers are disclosed. Exemplary transformer includes primary windings, secondary windings and third windings. Primary windings, secondary windings and third windings may include sub windings coupled to form junctions. Primary windings are coupled at ends to form a delta configurations. Secondary windings are coupled to primary windings. Third windings are coupled to primary windings and secondary windings. Secondary windings and the third windings are magnetically coupled to primary windings. The outputs at second ends of third windings are greater than the outputs at the second ends of secondary windings. In some embodiments, the outputs at adjacent second ends of the third windings are substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of third windings are substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of secondary windings are substantially equal.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Inventors: Jian Huang, Jeffrey J. White
  • Publication number: 20100148900
    Abstract: Various embodiments of multi-phase transformers are disclosed. For example, a transformer includes primary windings, secondary windings and third windings. Primary windings, secondary windings and third windings may include sub windings coupled to form junctions. Primary windings are coupled at ends to form a delta configuration. Secondary windings are coupled to primary windings. Third windings are coupled to primary windings and secondary windings. Secondary windings and the third windings may be magnetically coupled to primary windings. The outputs at second ends of third windings are greater than the outputs at the second ends of secondary windings. In some embodiments, the outputs at adjacent second ends of the third windings are substantially equal. In other embodiments, a phase angle difference of outputs at adjacent second ends of third windings is substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of secondary windings is substantially equal.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Inventors: Jian Huang, Jeffrey J. White
  • Publication number: 20100148898
    Abstract: A zigzag autotransformer includes a zigzag transformer including first, second and third magnetic cores and an auxiliary winding set including respective pairs of series-connected windings on respective pairs of the first, second and third magnetic cores, the pairs of series-connected windings having respective first terminals connected to respective AC input phase terminals of the zigzag autotransformer and respective second terminals configured to provide respective AC output phases.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Inventor: Robert William Johnson, JR.
  • Publication number: 20100060397
    Abstract: An inductor array that includes a plurality of inductors where adjacent inductors share a core piece and thus a flux path to reduce the size and weight of the array. In one embodiment, the shared core pieces are formed as back-to-back U-shaped members defining an indented region at the center of the core piece. In another embodiment, a plurality of small block-shaped center core pieces in each inductor defines a plurality of gaps therebetween.
    Type: Application
    Filed: September 9, 2008
    Publication date: March 11, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: STEPHEN RAISER, THOMAS VOGEL
  • Patent number: 6912921
    Abstract: A torque detecting device includes an elastic member disposed between an input shaft and an output shaft of a torque transmitting apparatus, first and second resolvers detecting rotational angles of the elastic member at sides of the input shaft and the output shaft. The first resolver includes a first excitation winding coil and a first output winding coil, and the second resolver includes a second excitation winding coil and a second output winding coil. The first and second excitation winding coils are connected to a ground, and the first and second output winding coils are connected to the other ground.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: July 5, 2005
    Assignee: Toyoda Koki Kabushiki Kaisha
    Inventors: Hidetoshi Fujiwara, Mitsunori Naruse, Yuji Yoshizawa, Mikihiko Mizuno
  • Patent number: 6879232
    Abstract: A transformer includes taps by which electrical contact can be made to winding sections of the transformer at locations along its length between its end terminals. A first switch permits contact to be made selectively to a selected one of the taps. An amplifier has an inverting input terminal, a non-inverting input terminal and an output terminal. The output terminal of the amplifier is coupled to the first switch so that selectively making contact with one of the taps couples the selected tap to the output terminal of the amplifier.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: April 12, 2005
    Assignee: Radian Research, Inc.
    Inventor: Glenn A. Mayfield
  • Patent number: 6841847
    Abstract: A 3-D spiral stacked inductor is provided having a substrate with a plurality of turns in a plurality of levels wherein the number of levels increases from an inner turn to the outer turn of the inductor. First and second connecting portions are respectively connected to an inner turn and an outermost turn, and dielectric material contains the first and second connecting portions and the plurality of turns over the substrate.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: January 11, 2005
    Assignee: Chartered Semiconductor Manufacturing, Ltd.
    Inventors: Choon-Beng Sia, Kiat Seng Yeo, Shao-fu Sanford Chu, Cheng Yeow Ng, Kok Wai Chew, Wang Ling Goh
  • Patent number: 6806803
    Abstract: An electrical transformer is disclosed. The electrical transformer comprises a central axis, a first modular section, and a second modular section. The first modular section is positioned about the central axis and comprises a first support, a first winding of a conductive element, and a first insulating material. The first winding of a conductive element is located about the first support. The first insulating material covers a portion of the first modular section. The second modular section is axially aligned with the first modular section and electrically connected to the first modular section. The second modular section comprises a second support, a second winding of a conductive element, and a second insulating material. The second winding of a conductive element is located about the second support. The second insulating material covers a portion of the second modular section.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: October 19, 2004
    Assignee: Square D Company
    Inventors: Philip J. Hopkinson, Dilip R. Purohit, Gary D. King
  • Publication number: 20040075515
    Abstract: A high frequency power amplifying device has two amplifying lines. Each amplifying line has a configuration in which a plurality of amplifying stages are connected in cascade having two source voltage terminals, of which one is connected to the first amplifying stage of one amplifying line and to the remaining amplifying stages of the other amplifying line, and the other, to the first amplifying stage of the latter amplifying line and to the remaining amplifying stages of the former amplifying line. An air core coil with a low D.C. resistance, formed by spirally winding a copper wire of about 0.1 mm in diameter, is connected in series between the final amplifying stage of each amplifying line and the source voltage terminal. Since there is no signal leak in each amplifying line from the final amplifying stage to the first amplifying stage and the D.C. resistance of the air core coil is low, oscillation margin can be improved.
    Type: Application
    Filed: October 22, 2003
    Publication date: April 22, 2004
    Inventors: Toshihiko Kyogoku, Tadashi Kodu, Kiyoharu Mochiduki, Sakae Kikuchi, Akio Ishidu, Yoshihiko Kobayashi, Masashi Maruyama, Iwamichi Kojiro, Susumu Sato
  • Patent number: 6326877
    Abstract: A winding structure for a transformer has a first support having a central axis, and a second support also having a central axis. The second support is positioned having its central axis generally in-line with the central axis of the first support. The winding structure also has a winding which is wrapped around at least a portion of the first and second supports. The supports are tubular and are provided for at least supporting the winding. A method of making the transformer includes the steps of providing a mounting apparatus, and mounting a first support having a central on the mounting apparatus. The method also includes mounting a second support having a central axis on the mounting apparatus, wherein the second support is mounted on the mounting apparatus with its central axis mounted generally in-line with the central axis of the first support. In addition, the method includes winding a conductor around at least a portion of the first and second supports to form a winding.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: December 4, 2001
    Assignee: Square D Company
    Inventors: Noah D. Hay, Gary D. King
  • Patent number: 6323602
    Abstract: A ballast circuit includes an equalizer transformer for equalizing current between two or more lamps operated in parallel, combined on one core with a choke. In a 2-lamp embodiment, four windings are provided on one main core. The first and second are closely coupled and have N turns each, each connected separately to one of the lamps. A third and fourth winding are loosely coupled with respect to each other, and are arranged symmetrically about the first and second windings on the main core. These latter windings may be connected in series or in parallel to be an inductive impedance in the ballast circuit.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: November 27, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Hendrik W. J. De Groot, Petrus C. J. Laros
  • Patent number: 6208230
    Abstract: A transformer for a cycloconverter includes three single-phase transformers connected into a three-phase configuration. Each of the single-phase transformers includes a two-legged core, primary windings wound on at least one of legs of the two-legged core, and twelve secondary windings wound on at least one of the legs of the two-legged core. The secondary windings are connected to positive group converters and negative group converters of a three-phase output circulating current type cycloconverter composed of three single-phase output circulating current type cycloconverters connected in a three-phase configuration. Each of the single-phase output circulating current type cycloconverters includes two positive group converters and two negative group converters arranged in a twelve-pulse bridge configuration.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: March 27, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiromu Shiota
  • Patent number: 6169674
    Abstract: Harmonic distortion in a multiple phase power system is controlled by enabling different phase relationships to be set, and changed, in the field, between the devices being energized and the power source providing the energization. This has particular application, for example, in canceling harmonics caused by multiple six-pulse variable frequency drives used for controlling connected three-phase induction motors that operate electric submersible pumps. A transformer used to achieve this has two winding groups, each with two sets of contacts at different phase relationships.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: January 2, 2001
    Assignee: Southwest Electric Company
    Inventor: Donald W. Owen
  • Patent number: 5982262
    Abstract: A phase shifting transformer or autotransformer for a three phase power distribution network in which selected outputs have a low zero phase sequence impedance. At least one low zero phase sequence impedance output is fed by a plurality of windings distributed amongst the three core legs such that the number of turns of windings generating a flux in the positive direction is substantially equal to the number of turns of windings generating a flux in the negative direction. Thus, according to the invention, the transformer may be provided with any necessary phase shifting angles between different harmonic sources, with some or all outputs having a low zero phase sequence impedance to reduce voltage distortion created by zero phase sequence harmonics.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: November 9, 1999
    Inventor: Michael I. Levin
  • Patent number: 5929738
    Abstract: A triple core transformer including a coupler connected to a third core between two primary windings. Two sets of twisted pairs are wound around each primary core such that a strand of each pair communicates with primary each core. One strand of each pair is wound denser than the complementary strand of that pair. The denser strands are connected to a third winding around the third core. The third winding is wound in a series of segments. Each of the segments is connected to the preceding segment in a wire twist.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: July 27, 1999
    Assignee: Thomas & Betts International, Inc.
    Inventor: Vito Orlando
  • Patent number: 5801610
    Abstract: A phase shifting transformer or autotransformer for a three phase power distribution network has a secondary winding including a plurality of windings distributed amongst the three core legs such that on each core leg the number of turns of windings generating a flux in the positive direction is substantially equal to the number of turns of windings generating a flux in the negative direction. Thus, according to the invention, the transformer may be provided with any necessary phase shifting angles between different harmonic sources, with outputs each having a very low zero phase sequence impedance to reduce voltage distortion created by zero phase sequence harmonics.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: September 1, 1998
    Inventor: Michael I. Levin
  • Patent number: 5557249
    Abstract: A three phase transformer having a pair of additional coupled windings on the secondary side of each phase, with these coupled windings properly connected in series to develop a voltage in phase with a particular secondary voltage but driven from alternate phase primaries. The primary and secondary windings are connected in a Y or .DELTA. configuration. One coupled winding from each of the two phases, other than the desired secondary phase which is to be balanced, are joined in negative series so that when summed, they are aligned with the secondary phase being corrected. The series coupled windings are connected in parallel with the third secondary. The unbalanced current is split between the secondary winding and between the two coupled windings, each of which is coupled to the primary of another phase. The coupled winding combined voltages and resistances are approximately equal to the voltage and resistance of the secondary.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: September 17, 1996
    Inventor: Thomas J. Reynal
  • Patent number: 5543771
    Abstract: A phase shifting polygonal transformer or autotransformer for a three phase electrical distribution system is provided, in which the transformer output winding or autotransformer winding is composed solely of three main coils and three auxiliary coils, alternately interconnected in series. The outputs for the transformer/autotransformer are connected to taps in the coils offset from the connections between coils, which eliminates the need for multiple auxiliary coils in each phase. The transformer/autotransformer of the invention is thus much simpler and less expensive to manufacture than a conventional phase shifting transformer or autotransformer, but reduces harmonics just as effectively.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: August 6, 1996
    Inventor: Michael I. Levin