Embedded In A Core Patents (Class 310/156.53)
  • Patent number: 11025113
    Abstract: A hybrid rotor assembly is provided. The assembly utilizes two different types of magnets within the lamination cavities of the lamination stack: sintered permanent magnets and bonded magnets.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: June 1, 2021
    Assignee: Atieva, Inc.
    Inventor: Emad Dlala
  • Patent number: 11011964
    Abstract: A cage induction motor includes a rotor core that is rotatable about a central axis, and a shaft to which the rotor core is fixed. The rotor core includes an annular yoke and a plurality of spokes. The yoke supports at least one conductor. The plurality of spokes are arranged apart from one another in a circumferential direction of the yoke, are provided between the yoke and the shaft, and support the yoke.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: May 18, 2021
    Assignees: CENTRAL JAPAN RAILWAY COMPANY, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Kenji Sato, Takafumi Fukushima, Daisuke Misu, Makoto Matsushita, Toshio Hasebe
  • Patent number: 10910893
    Abstract: A rotor for a synchronous reluctance machine having an even number 2 p of poles circumferentially spaced at an angle ?, with ?=2 ?/2 p, the rotor comprising a substantially cylindrical laminate stack having a plurality of magnetically conductive laminations. One or more of the magnetically conductive laminations includes non-magnetic flux barriers which are spaced from each other in the radial direction, one or more of the non-magnetic flux barriers having a first and second bridge transversally positioned in correspondence of their lateral ends and defining a first and a second air-gap with the outer rim of the magnetically conductive lamination, and further including a third and a fourth bridge transversally positioned and respectively defining together with the first and second bridge a first and a second internal space which are filled with an electrically conductive and non-magnetically conductive material.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: February 2, 2021
    Assignee: ABB Schweiz AG
    Inventors: Jere Kolehmainen, Tero Kansakangas, Pietro Savio Termini
  • Patent number: 10910987
    Abstract: To provide a motor control method ensuring that dragging loss at the time of high rotation can be reduced. A motor control method, wherein a composite permanent magnet has a core part and a shell part, the Curie temperature of one of the core part and the shell part is Tc1 K, and the Curie temperature of another is Tc2 K, and wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at Ts K that is (Tc1?100) K or higher and lower than Tc2 K and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature Ts K or Tc1 K, whichever is lower.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: February 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Masao Yano, Masaaki Ito, Tetsuya Shoji, Hidefumi Kishimoto, Akira Kato
  • Patent number: 10903702
    Abstract: A motor having an improved assembly structure of a rotor core and a magnet is provided. The motor comprising a stator and a rotor that rotates with respect to the stator. The rotor comprises a rotor core that is disposed rotatably with respect to a rotary shaft and has a plurality of magnet coupling apertures disposed apart from each other at a particular interval in a circumferential direction of the rotary shaft. Additionally, a magnet is inserted into the magnet coupling aperture and a plate is coupled to opposite end portions of the rotor core. The plate includes a magnet support portion that is configured to support the magnet.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: January 26, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jungwoo Lee, WoongChan Chae
  • Patent number: 10862356
    Abstract: A rotor for a reluctance machine includes conductor layers and insulation layers arranged in alternation in the axial direction. The conductor layers have magnetic-flux-conducting conductor regions and the insulation layers are electrically insulating. To improve weight and efficiency of a reluctance machine, the rotor is produced at least partially by additive manufacturing.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: December 8, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Roland Bittner, Markus Hösle
  • Patent number: 10862355
    Abstract: An armature includes a multi-phase armature coil and an armature core. The armature core includes a back yoke, a plurality of large-width teeth and a plurality of small-width teeth having a smaller circumferential width than the large-width teeth. The large-width teeth each radially protrude from the back yoke and are spaced from one another in a circumferential direction of the armature core. The large-width teeth have the armature coil concentratedly wound thereon. The small-width teeth each radially protrude from the back yoke and are spaced from one another in the circumferential direction of the armature core. The small-width teeth are arranged alternately with the large-width teeth in the circumferential direction of the armature core. Moreover, 1?W1/W2?2, where W1 is a radial width of the back yoke and W2 is the circumferential width of the small-width teeth.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: December 8, 2020
    Assignee: DENSO CORPORATION
    Inventor: Shin Kusase
  • Patent number: 10854397
    Abstract: An electric machine, to a motor vehicle with such an electric machine, and to a method for operating such an electric machine. The electric machine includes at least one sliding contact which is formed by a slip ring connected to a rotor and by at least one brush and via which an operating current flows during an operation of the electric machine. A control unit is configured to control the operation of the electric machine. The control unit is configured to verify a predetermined operating criterion of the electric machine and, if said operating criterion is met, to inject a cleaning current according to a predetermined scheme, which then flows independently of the operating current via the sliding contact and cleans said sliding contact in order to maintain or improve a current transfer capability of the sliding contact.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: December 1, 2020
    Assignee: AUDI AG
    Inventor: Roman Strasser
  • Patent number: 10848037
    Abstract: A permanent magnet rotor (1) with a magnetically conductive magnetic core (2), which has a plurality of magnet retainers (3, 4) for radially arranged and essentially tangentially magnetized permanent magnet parts (9), and a method for the production thereof. With a common permanent magnet rotor, the object of the present invention is to ensure a simple installation for a low number of components to be installed, very good magnetizability, high strength of the mechanical connection of the permanent magnet parts in the magnet retainers, and a compact size.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: November 24, 2020
    Assignee: BÜHLER MOTOR GMBH
    Inventors: Mladen Zec, Armin Suttner-Reimann, Heinz Günther
  • Patent number: 10840753
    Abstract: A permanent magnet module for an electrical machine extending along an axial direction is provided. The permanent magnet module comprises a permanent magnet assembly comprising at least one permanent magnet and a base supporting at least part of the permanent magnet assembly and extending from a bottom adapted to be positioned on a rotor of an electrical machine to a top along a radial direction. The permanent magnet assembly further comprises a first inclined permanent magnet portion and a second inclined permanent magnet portion arranged outwardly inclined along the radial direction and a tangential permanent magnet portion arranged substantially perpendicular to the radial direction.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 17, 2020
    Assignee: GE Renewable Technologies Wind B.V.
    Inventors: César Muñiz Casais, Julio César Urresty, Adrian Bueno De Santiago
  • Patent number: 10840762
    Abstract: A brushless motor includes a stator including teeth each including a constricted portion on which a coil is to be wound, and a tip end portion including a confronting surface that faces a rotor and having a width greater than that of the constricted portion. A spacer includes closure members disposed between adjacent ones of the tip end portions, and fitted to the teeth so that the confronting surfaces of the teeth are exposed toward the rotor.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: November 17, 2020
    Assignee: YAMAHA MOTOR ELECTRONICS CO., LTD.
    Inventors: Toshihiko Nagata, Yasufumi Takagi, Tomonari Shiraishi
  • Patent number: 10840754
    Abstract: A permanent magnet machine includes a rotor including a rotor hub and a plurality of permanent magnets embedded in the rotor in a circumferential pattern. The rotor includes a respective bridge between each circumferentially adjacent pair of the permanent magnets. Each bridge is of a different material than that of the rotor hub, and the rotor hub and bridges are integral with one another.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: November 17, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Dhaval Patel, Andreas C. Koenig
  • Patent number: 10784729
    Abstract: A rotor has reduced weight. A hammer drill includes a motor including a stator and a rotor rotatable relative to the stator. The rotor includes a rotor core having a first space, and a permanent magnet fixed on the rotor core.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 22, 2020
    Assignee: MAKITA CORPORATION
    Inventor: Junya Inuzuka
  • Patent number: 10778055
    Abstract: In an electric motor, a first magnet and a second magnet are accommodated in magnet accommodating apertures of a rotor core. On outer circumferential core portions that exist on a radially outer side of the magnet accommodating apertures, two slits as a pair of first slits, and two slits that are respectively adjacent to each of the first slits are disposed circumferentially outside the pair of first slits as a pair of second slits. The outer circumferential core portions include: a first magnetic portion that exists between the pair of first slits; and a pair of second magnetic portions that respectively exist between the first slits and the second slits. An inter-magnet space portion that exists between the first magnet and the second magnet is positioned within a range of the first magnetic portion in the circumferential direction of the rotor.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: September 15, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiko Baba, Masahiro Nigo, Kazuchika Tsuchida, Atsushi Ishikawa
  • Patent number: 10770960
    Abstract: A permanent magnet motor, comprising a stator (1) and a rotor (4); the rotor comprises a rotor iron core (5) and permanent magnets (7a, 7b); in the radial direction of the rotor, each magnetic pole of the rotor iron core is provided with multiple layers of arc-shaped permanent magnet grooves (6a, 6b); a q-axis magnetic flux path is formed between two neighboring magnetic poles; the permanent magnets are disposed in the permanent magnet grooves; two neighboring magnetic poles of the rotor are respectively a first magnetic pole and a second magnetic pole having opposite polarities; an outer endpoint of a permanent magnet in the first magnetic pole is a first outer endpoint, said outer endpoint is farther from the q-axis; an outer endpoint of the permanent magnet in the second magnetic pole is a second outer endpoint, said outer endpoint is farther from the q-axis; an included angle A of the first outer endpoint and the second outer endpoint with respect to the center of the rotor is less than an electrical angl
    Type: Grant
    Filed: June 25, 2016
    Date of Patent: September 8, 2020
    Assignee: Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
    Inventor: Yong Xiao
  • Patent number: 10756585
    Abstract: An electrical machine, in particular a synchronous reluctance motor, having a rotor having a number of similar permanent magnets, each of which is disposed in each case in an associated pocket of the rotor. Permanent magnets adjacent in a tangential direction can be installed only in one position in the respective pocket, in which the magnetization directions is rotated by 180° with respect to a radial straight line associated with the respective permanent magnet. A rotor of an electrical machine is also provided.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 25, 2020
    Assignee: Baumueller Nuernberg GmbH
    Inventors: Jiri Kurfuerst, Jiri Skoda, Tomás Jindra, Jan Rezek, Ladislav Knebl
  • Patent number: 10742080
    Abstract: A rotor mechanism includes a plurality of rotor bars and a rotor core. The rotor bars are disposed along the edge of the rotor core. The rotor core has a plurality of magnetic flux-barrier units and at least one flux channel. Each magnetic flux-barrier unit extends from one of the rotor bars to another rotor bar. The flux channel passes through the flux-barrier units and surrounds an axis of the rotor core, wherein each magnetic flux-barrier unit is a magnetic flux barrier, and the area between the adjacent magnetic flux-barrier units and the flux channel are pathways for magnetic flux.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 11, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ming-Mao Hsu, Wen-Yang Peng, Kuo-Lin Chiu, Chau-Shin Jang
  • Patent number: 10739046
    Abstract: A compressor is configured such that an axis center of a rotating shaft for transmitting rotation of a rotor to a compressing unit for compressing a refrigerant is offset from a rotor center of the rotor, and, when the rotor is divided into, with respect to the rotor center, a first portion located on a side in a direction from the axis center to the rotor center and a second portion located on a side in a direction from the rotor center to the axis center, a magnetic force of the first portion is stronger than a magnetic force of the second portion. This configuration allows the rotor to generate non-uniform magnetic attractive forces during the rotation of the rotor and thereby can suppress vibration generated due to rotation of an eccentric portion of the compressing unit and reduce noise.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: August 11, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuchika Tsuchida
  • Patent number: 10727708
    Abstract: Magnet slot includes a permanent magnet insertion portion and air regions that is formed at both circumferential direction ends of the permanent magnet insertion portion. The air region includes a first circumferentially extending portion that extends from a circumferentially end portion of the permanent magnet insertion portion to a circumferentially outer side, a radially extending portion that extends from the first circumferentially extending portion to a radially inner side, and a second circumferentially extending portion that extends from the radially extending portion to a circumferentially inner side until reaching between the radially inner peripheral surface of the permanent magnet insertion portion and the shaft hole. A radially inner end surface of the radially extending portion and a radially inner end surface of the second circumferentially extending portion are made up of a portion of a circular arc in contact with the circumferentially outer side surface of the radially extending portion.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: July 28, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Hideki Ohguchi, Hitoshi Nakazono, Hideki Nishikawa, Toshiya Sasaki
  • Patent number: 10727709
    Abstract: Provided are a rotor of a rotary electrical machine, a rotary electrical machine, and a vehicle, which enable mitigation of stress concentration generated in a magnet insertion hole of a rotor core and high-speed rotation. A rotor 250 of a rotary electrical machine includes: a rotor core 252 including a plurality of magnet insertion holes 253 for each magnetic pole; and permanent magnets 254 inserted into the magnet insertion holes, in which a bridge portion 260, which mechanically connects a rotor core portion 256 on the outer circumferential side of the magnet insertion holes 253 and a rotor core portion 263 on the inner circumferential side of the magnet insertion holes 253, is provided between the adjacent magnet insertion holes, and the bridge portion 260 has two inflection points 266a and 266b on the outer circumferential side of the bridge portion 260.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: July 28, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuji Kano, Hiroshi Hamano, Takayuki Koizumi, Yasuyuki Saito, Yousuke Umesaki, Seigo Misaki
  • Patent number: 10707710
    Abstract: The present invention is to provide a rotor capable of further increasing curvature of a permanent magnet while absorbing strain in the permanent magnet. A rotor having an embedded magnet type structure includes a rotor core having a plurality of slots disposed in a circumferential direction and a plurality of magnet parts respectively stored in the plurality of slots.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: July 7, 2020
    Assignee: FANUC CORPORATION
    Inventor: Akihiro Hosoda
  • Patent number: 10693331
    Abstract: A synchronous machine with flux concentration. The synchronous machine enables improved torquing characteristics with a simple structure in that at least one additional permanent magnet is provided in the rotor and/or stator, whose generated magnetic flux is at least partially returned via the flux guide regions of the rotor, wherein the magnetic flux of the additional permanent magnet in the flux guide regions of the rotor has a direction opposite to the magnetisation direction of the permanent magnets of the rotor.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: June 23, 2020
    Assignee: EMF 97 Elektro-Maschinen-Vertrieb-Magnettechnik-und Forschungs-GmbH
    Inventors: Jürgen Lindner, Michael Prokopp, Thomas Hames, Hasan Basri Kayakiran
  • Patent number: 10686341
    Abstract: A rotor of a rotating electric machine includes a rotor core, and a plurality of permanent magnets arranged in a two-layer structure having a first layer and a second layer, in the rotor core. Among the permanent magnets, first and second outermost permanent magnets located closest to each of opposite q-axes of each magnetic pole are located relative to each other, such that a radial position of an end portion on a q-axis side and a radially inner side in the first outermost permanent magnet that belongs to the first layer is spaced by a predetermined radial spacing from and is on a radially outer side of a radial position of an end portion on the q-axis side and a radially outer side in the second outermost permanent magnet that belongs to the second layer.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: June 16, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinya Sano, Hiroyuki Hattori, Yasuhide Yagyu, Takanori Kadota
  • Patent number: 10680475
    Abstract: There is provided a rotor for a rotary electric machine including a rotor core of an approximately annular shape having a plurality of magnet inserting holes formed at predetermined intervals in a circumferential direction thereof, and a plurality of permanent magnets inserted into the magnet inserting holes. A rotor yoke on at least an outer circumferential side relative to the magnet inserting holes of the rotor core is formed of a magnetic material. The outer circumferential side relative to the magnet inserting holes of the rotor core has a hole portion approximately on a d-axis of each magnetic poles formed by the permanent magnets.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: June 9, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Keisuke Azusawa
  • Patent number: 10644550
    Abstract: A rotor for a rotating electric machine includes a hollow cylindrical rotor core and a plurality of permanent magnets. The rotor core has a plurality of magnet-receiving holes arranged in a circumferential direction thereof. The permanent magnets are received respectively in the magnet-receiving holes of the rotor core to form a plurality of magnetic poles the polarities of which alternate between north and south in the circumferential direction of the rotor core. Moreover, the rotor core further has a plurality of q-axis core portions each of which is located between one circumferentially-adjacent pair of the magnetic poles. For each of the q-axis core portions, a radially outer circumferential width center of the q-axis core portion is offset upstream in a direction of rotation of the rotor from a radially inner circumferential width center of the q-axis core portion.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: May 5, 2020
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 10629348
    Abstract: The present invention provides a permanent magnet unit in which insulating layers are located at positions where an eddy current can be reduced most effectively. The permanent magnet unit includes at least one insulating layer, and a plurality of permanent magnet pieces located adjacent to each other with the at least one insulating layer in between. The at least one insulating layer is located at positions defined based on a magnitude of an eddy current flowing inside a permanent magnet, corresponding to a change in a magnetic field of the permanent magnet into which a plurality of the permanent magnet pieces are integrally formed without the at least one insulating layer.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 21, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shoichiro Saito, Makoto Fujihara, Izumi Ozeki, Kenichi Fujikawa
  • Patent number: 10622875
    Abstract: An IPM electric machine includes a rotor, rotor shaft stator, and permanent magnets. The rotor includes rare earth permanent magnets disposed within pockets. The rotor, the pockets and the permanent magnets conform to a first set of geometric design parameters. The stator includes radially-inwardly projecting teeth that form slots between pairs of the teeth. Electrical windings are disposed within slots of the laminate stack. The teeth and slots conform to a second set of geometric design parameters. The quantity of slots is between 60 and 96, the quantity of electrical poles is between 6 and 12, the quantity of electrical phases is between 3 and 6 and the electrical windings include a quantity of turns per phase that is between 8 and 20. A ratio of an outer diameter of the stator to an active length of the rotor is between 2 and 3.5.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: April 14, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Alireza Fatemi, Lei Hao, Thomas W. Nehl, Chandra S. Namuduri, Norman K. Bucknor
  • Patent number: 10608486
    Abstract: Provided is an interior permanent magnet motor, including: a stator; and a rotor, in which an outline of each of magnet insertion holes includes a radially inner-side line, a radially outer-side line, a pair of side lines, a pair of first round portions, and a pair of second round portions, in which a thin portion is formed between an outer peripheral surface of the rotor and each of the side lines, in which each of the first round portions is provided between a corresponding end of the corresponding radially outer-side line and a corresponding end of the corresponding side line, and in which each of the second round portions is provided between a corresponding end of the corresponding radially inner-side line and a corresponding end of the corresponding side line.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: March 31, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Ishikawa, Kazuhiko Baba, Masahiro Nigo, Kazuchika Tsuchida
  • Patent number: 10608485
    Abstract: The disclosure relates to a rotor for a permanently excited electric machine. The rotor includes a holding pocket which is formed by a cutout of the rotor and which is designed to receive a permanent magnet. At least one flexible limb projects into the holding pocket of the rotor, and is designed to form an interference fit together with a circumferential boundary of the holding pocket and the permanent magnet arranged between the at least one flexible limb and the circumferential boundary.
    Type: Grant
    Filed: February 18, 2018
    Date of Patent: March 31, 2020
    Assignee: Continental Automotive GmbH
    Inventors: Holger Fröhlich, Isao Fukumoto
  • Patent number: 10608487
    Abstract: An electric machine includes a unitary, single material substrate defining a rotor lamination including a first region having a predefined magnetic permeability. The rotor lamination includes an arc-shaped second region having a magnetic permeability less than the first region. The second region is oriented such that it impedes flux associated with magnets contained by the first region and perpendicular to quadrature flux field lines associated with the magnets.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: March 31, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Feng Liang, Leyi Zhu, Lusu Guo, Michael W. Degner
  • Patent number: 10581286
    Abstract: A rotor of a permanent-magnet-embedded electric motor includes an annular rotor core having a plurality of magnet insertion holes formed in a circumferential direction, and permanent magnets inserted into the magnet insertion holes, respectively. The rotor core is formed by alternately stacking a first core block and a second core block in an axial direction of the rotor core, the first core block not having slits between each of the magnet insertion holes and a circumferential surface of the rotor core, and the second core block having the slits between each of the magnet insertion holes and the circumferential surface of the rotor core. One of the slits and one end of the permanent magnet are arrayed in a radial direction, and the other slit and the other end of the permanent magnet are arrayed in the radial direction.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: March 3, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Ishikawa, Masahiro Nigo
  • Patent number: 10574102
    Abstract: A rotary electrical machine comprises a stator and a rotor having an axis of rotation, wherein, on a plane radial to the axis of rotation has a rotor tooth with an arc of a circle. The arc is defined by a centre situated on the axis of symmetry of the tooth, a first point at an intersection between the axis of symmetry and a circle centred on the axis of rotation, and an outer radius. A second point is situated on an axis which passes via the axis of rotation, and forms an angle of 360° divided by a number equal to twice the number of magnetic poles. The second point is situated from the axis of rotation an amount equal to the outer radius decreased by an allowance. A ratio between the allowance and the outer radius is between 0.015 and 0.07.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: February 25, 2020
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Jérome Legranger, Khadija El Baraka, Svetislav Jugovic
  • Patent number: 10566859
    Abstract: A rotor includes a rotor core and a bond magnet. The rotor core has core blocks and a partition core sandwiched between the core blocks in an axial direction. Magnet holes pass through the core blocks and the partition core in the axial direction, respectively, and the magnet hole is communicated with the magnet holes. Positions of the magnet holes in a circumferential direction are deviated from each other. The bond magnet fills the magnet holes.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: February 18, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshinari Asano, Yoshiki Yasuda, Masaki Hirano
  • Patent number: 10560005
    Abstract: An apparatus for manufacturing a laminated iron core includes a conveyance jig on which a laminated iron core body is placed, a die unit including a lower die and an upper die upwardly and downwardly movable with respect to the lower die, which holds the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the laminated iron core body between the lower die and the upper die, an injector injecting a resin into a through hole formed through the laminated iron core body held by the die unit from the lower die through the conveyance jig or the upper die, and an upward and downward movement unit capable of upwardly and downwardly moving the conveyance jig with respect to the lower die, and being provided independently from the die unit.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: February 11, 2020
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Hirotoshi Mabu, Hidemi Sasaki
  • Patent number: 10547221
    Abstract: A compressor motor and a method for magnetizing a rotor thereof are provided. The compressor motor includes a stator and a rotor configured to electromagnetically interact with the stator to be rotated, wherein the rotor includes a core, a plurality of magnets inserted into the core, and a cover configured to cover both end portions of the core and to be injection-molded so as to fill accommodation spaces that are formed between the core and the plurality of magnets.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: January 28, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-bum Lee, Gyeong-don Kim, Young-ju Ryu, Jong-hyun Choi, In-cheol Hwang
  • Patent number: 10541576
    Abstract: An electric machine including a stator and rotor. The rotor has a core wherein each pole includes first and second axially extending magnet slots positioned in an outwardly opening V-shape. Permanent magnets are positioned in the magnet slots. The magnet slots define first and second opposing major edges wherein the first major edge is disposed nearer the outer radial perimeter of the rotor core. First and second opposing minor edges extend between the major edges and the first minor edge is disposed nearer the outer radial perimeter. The first and second slots are reflectively symmetrical with one symmetrical aberration. The symmetrical aberration being formed by an axially extending non-symmetric gap defined by the first major edge of the second magnet slot proximate the first minor edge. Demagnetization may be reduced by operating the machine with the second magnet slot trailing the first magnet slot during rotation of the rotor.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: January 21, 2020
    Assignee: BorgWarner, Inc.
    Inventor: Seong Taek Lee
  • Patent number: 10530203
    Abstract: According to one embodiment, a rotor includes a shaft and a rotor core fixed to the shaft. A plurality of flux barriers are formed at the rotor core. Each of the flux barriers is formed with a plurality of bridges, and one or more barrier regions that have a lower permeability than a portion other than each of the flux bathers in the rotor core between the plurality of bridges. A permanent magnet is provided in at least one of the barrier regions. A magnetizing direction of the permanent magnet is directed in a direction that intersects a longitudinal direction of the flux barrier. A value of (?0×SM×Br)/(?re×tFB×wB) is within a range between 1.2 and 3.0.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: January 7, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Katsutoku Takeuchi, Makoto Matsushita, Norio Takahashi, Daisuke Misu, Toshio Hasebe
  • Patent number: 10530205
    Abstract: A rotary electric machine includes a stator and a rotor. The rotor includes a rotor core and a plurality of permanent magnets. The permanent magnets are disposed to be divided into two layers, the two layers being a layer on the outer peripheral side and a layer on the inner peripheral side of the rotor core, and the permanent magnets are disposed line-symmetrically with respect to a magnetic pole center of the rotor core and in a V-shape or a U-shape in each of the two layers. An angle that each of the permanent magnets disposed on the outer peripheral side makes with the magnetic pole center of the V-shape or the U-shape is larger than an angle that each of the permanent magnets disposed on the inner peripheral side makes with the magnetic pole center of the V-shape or the U-shape.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: January 7, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroyuki Hattori
  • Patent number: 10523099
    Abstract: A rotor for a reluctance machine is provided. The rotor includes a cylindrical soft-magnetic element having cutouts for forming magnetic flux barriers. Some or all of the flux barriers are divided by one or more webs, with the profile of the individual webs forming a closed line which divides the rotor in the radial direction into an inner and an outer region. The cut-outs may be partially or fully filled with a a paramagnetic or diamagnetic filler material.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: December 31, 2019
    Assignee: KSB Aktiengesellschaft
    Inventors: Meike Haussmann, Florian Kanoffsky, Martin Mueller, Timo Muntz, Jochen Schaab, Boris Janjic
  • Patent number: 10523071
    Abstract: Disclosed is a motor comprising a stator and a rotor, wherein the rotor comprises a plurality of rotor cores and a plurality of magnets, and wherein the magnet is configured to have a face facing the center of rotation of the rotor exposed. Accordingly, a motor may minimize a non-magnetization area and enable a magnet to be fully magnetized, when it comes to post magnetization of the magnet.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: December 31, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Gu Lee, Su Kwon Jeong, Jae Woong Jung, Woong Hwang, Uk Ho Seo
  • Patent number: 10516308
    Abstract: A rotor for an electric motor which includes permanent magnets is formed so that the possibility of demagnetization of the permanent magnets is reduced. The rotor has at least one permanent magnet embedded in a magnetically conductive rotor core, and at least one flux path in the rotor core, for a magnetic flux caused by a magnetic stator field generated by a stator of the electric motor. The rotor core is realized, with respect to at least one of the flux paths, with a magnetically conductive shunt that bridges at least one of the permanent magnets for the magnetic flux that is caused by the stator field.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: December 24, 2019
    Assignee: Volkswagen Aktiengesellschaft
    Inventor: Ljubomir Adzic
  • Patent number: 10505417
    Abstract: A rotor has a first slot and a second slot each being substantially rectangular and together forming a V-shape when viewed from the direction of a rotary axis. The rotor also has flux barriers each provided between a first abutting portion and a second abutting portion on an outer peripheral side of each of the first slot and the second slot and formed to bulge toward the outer peripheral side relative to short edges on the outer peripheral side of the first slot and the second slot when viewed from the direction of the rotary axis of the rotor core.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: December 10, 2019
    Assignee: FANUC CORPORATION
    Inventor: Akihiro Hosoda
  • Patent number: 10491063
    Abstract: The present invention concerns a rotor of a rotating electric machine, comprising a rotor body (2) in which recesses (3) are provided in such a way as to define the poles (4) of the rotor, in particular at least three recesses per pole, each pole having a radial axis of the pole, the recesses (3) having an elongated shape and each comprising two short sides, the recesses being disposed in one or a plurality of rows per pole, one row comprising at least two, or indeed at least three recesses (3) disposed consecutively, the short sides thereof defining, between two consecutive recesses of a given row, a material bridge, said material bridge generally extending along a longitudinal axis (2) of the bridge oriented closer to the radial axis of the corresponding pole of the rotor, the further one is from the rotational axis.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: November 26, 2019
    Assignee: MOTEURS LEROY-SOMER
    Inventor: Samuel Koechlin
  • Patent number: 10491064
    Abstract: A rotor includes nested V-shaped inner and outer pockets defining corresponding pole arc angles relative to a common center bridge axis and vertex, respective inner and outer top bridges, and respective inner and outer center bridges. A ratio of corresponding pole arc angle dependent functions and a ratio of a sum of the inner top bridges and center bridge widths to a sum of the outer top bridges and center bridge widths are same.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: November 26, 2019
    Assignee: Ford Global Technologies, LLC
    Inventor: Chun Tang
  • Patent number: 10483813
    Abstract: The described technology relates to a rotor having a flux filtering function and a synchronous motor comprising the same. The rotor includes a rotor iron core, a plurality of permanent magnets and a plurality of conductor bars. The rotor iron core has a rotary shaft insertion hole, formed in the center thereof, into which a rotary shaft is inserted, a plurality of permanent magnet insertion holes being formed in the circumference of the rotary shaft insertion hole, and a plurality of conductor bar insertion holes are uniformly formed in a region between the plurality of permanent magnet insertion holes and the outer surfaces thereof. The plurality of permanent magnets are respectively inserted into the plurality of permanent magnet insertion holes, thereby forming N and S magnetic poles of the rotor. Additionally, the plurality of conductor bars are respectively inserted into the plurality of conductor bar insertion holes.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: November 19, 2019
    Assignee: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
    Inventors: Jeongjong Lee, Youngkyoun Kim, Sehyun Rhyu, Jungmoo Seo, Insoung Jung
  • Patent number: 10483815
    Abstract: A rotor includes an iron core that assumes a cylindrical or columnar shape, and a plurality of magnets embedded in the iron core and equiangularly arranged with respect to an axis of the iron core. The iron core includes a first end surface portion, a second end surface portion, and a central portion disposed between the first end surface portion and the second end surface portion. Each of the first end surface portion, the second end surface portion, and the central portion has one or more gaps formed at positions thereof remoter from the axis of the iron core than the magnets. A third cross-sectional planar dimension of the central portion is greater than a first cross-sectional planar dimension of the first end surface portion and a second cross-sectional planar dimension of the second end surface portion.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: November 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventor: Atsushi Ishikawa
  • Patent number: 10476328
    Abstract: A rotor for an electric motor is provided. The rotor is constructed of a stack of first and second laminations. The laminations include segments and insulated regions between the segments. The first laminations include interconnections such that the first laminations are self-supporting. The second laminations are affixed to the first laminations to support the segments of the second laminations.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: November 12, 2019
    Assignee: ABB Schweiz AG
    Inventors: Lorenzo Mazza, Alessandro Castagnini, Giulio Secondo
  • Patent number: 10476326
    Abstract: A rotor is for a permanent magnet embedded-type motor and a motor using the same. A rotor for a permanent magnet embedded-type motor includes a rotor core having a rotary shaft fixed to a center and having a plurality of magnet insertion holes formed to be spaced along a circumferential direction and a plurality of pairs of permanent magnets, respectively, inserted into each of the plurality of magnet insertion holes in a V-shape to be gradually spaced apart from each other toward a radially outer side. Each of the plurality of magnet insertion holes includes a pair of inner sides facing each other, and a barrier hole is formed to expand an inner space of each of the magnet insertion holes to protrude from the pair of inner sides, respectively.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 12, 2019
    Assignee: Hanon Systems
    Inventors: Jeong Gil Heo, Chan Ho Baek, Bong Kyun Seo
  • Patent number: 10468953
    Abstract: A stator of an electric motor (40) has windings (44) and a stator core (43) in which eighteen teeth (71), around which the windings (44) are wound, are formed circumferentially. A rotor of the electric motor (40) has magnets (72) and a rotor core (46) in which six insertion holes (73), into which the magnets (72) are inserted, are formed circumferentially. The magnets (72) are rare-earth magnets of a grain boundary diffusion type having a residual magnetic flux density Br of from 1.36 to 1.42 T. The total area of magnet-parallel cross-sections (84) of the teeth (71) is from 0.56 times to 0.93 times the total area of tooth-facing surfaces (83) of the magnets (72).
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: November 5, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshikazu Fujisue, Kazuya Kumagai
  • Patent number: 10447099
    Abstract: A rotary electric machine, in which ?>? is established when the teeth portion has a width ? in a circumferential direction thereof, a rotation center of the rotor and one of corners, which is on a rotor surface side, on both ends of each of the permanent magnets are connected by a straight line, a center between an N-pole and an S-pole of the permanent magnets is on a q-axis, and an angle formed by two straight lines on the q-axis side is ?, a first bridge part is provided between a flux barrier provided at the rotor core and the rotor surface, and ?>? is established when the first bridge part has a minimum width ?, and the flux barrier has a minimum width ? on the q-axis.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: October 15, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Moriyuki Hazeyama, Yoshihiro Miyama, Taiga Komatsu, Junji Kitao