Laminated Pole Shoes Patents (Class 310/156.67)
  • Patent number: 11088579
    Abstract: The present disclosure relates to a rotor (3) for an electric machine (1). The rotor (3) is composed of a support frame (5) having a centre section (8) and a plurality of spokes (9). The spokes (9) extend outwardly from the centre section (8). The spokes (9) each have at least first and second bridge elements (12A, 12B) formed by one or more flux barrier (13). The first and second bridge elements (12A, 12B) are configured to control magnetic flux leakage into said centre section (8). The present disclosure also relates to an electric machine (1) having a rotor (3) of this type.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: August 10, 2021
    Assignee: Jaguar Land Rover Limited
    Inventors: Alexandros Michaelides, Raymond William Long, Mohammad Kimiabeigi
  • Patent number: 10978924
    Abstract: A rotor of an electrical rotating machine includes: a rotor shaft; a cylindrical sleeve externally fitted to the rotor shaft and extending in an axial direction X; and a plurality of permanent magnets serving as field magnets, the plurality of permanent magnets being provided between the rotor shaft and the sleeve in a radial direction and retained by the sleeve around the rotor shaft. The sleeve is formed by a plurality of short sleeves arranged in the axial direction X, and end portions of the short sleeves that are adjacent to each other, the end portions being butted together in the axial direction X, are mechanically joined together in a torque-transmittable manner.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: April 13, 2021
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Ryo Miyamae, Shoichi Takahashi, Tatsuya Ohno, Yoshihiko Ozaki, Koji Hashimoto
  • Patent number: 9871429
    Abstract: A stator yoke is provided for a bicycle generator hub. The stator yoke includes a first tubular section and a plurality of first pole sections. The first tubular section has a first axial end and a second axial end. The first pole sections are integrally formed with the first tubular section as a one-piece, unitary member. Each of the first pole sections includes a first radially protruding section that extends from the first axial end of the first tubular section in a radial direction of the first tubular section, and a first axially protruding section that extends from the first protruding section in an axial direction of the first tubular section toward the second axial end of the first tubular section.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: January 16, 2018
    Assignee: Shimano Inc.
    Inventors: Hiroshi Hasegawa, Takeshi Fujiwara
  • Patent number: 8624459
    Abstract: A rotor of alternator has core layer units serially located along axial direction. Each unit has a field coil generating magnetic flux and two rotor cores receiving the flux on respective sides of the coil in axial direction. Each core has a first yoke portion located on inner side of the coil, a second yoke portion extending from the first yoke portion toward the outer side and magnetic poles extending from the second yoke portion in the axial direction. The poles of one core and the poles of the other core in each unit extend toward different axial sides and are alternately arranged in circumferential direction on the outer side of the coil. A ratio of the outer circumferential diameter of the first yoke portions to the rotational diameter of the poles is lower than 0.54.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: January 7, 2014
    Assignee: Denso Corporation
    Inventor: Takashi Tokizawa
  • Patent number: 8593029
    Abstract: Provided is a Lundell type rotating machine with high efficiency and high output, which has a rigid and magnetically advantageous magnet retention structure. A rotor iron core includes laminated magnetic-pole members mechanically and magnetically coupled to two laminated magnetic end plates, which extend in an axial direction so as to be brought into meshing engagement with each other to constitute a Lundell type rotor iron core, and permanent magnets provided between the magnetic-pole members. The magnetic-pole members are retained in predetermined positions between the magnetic end plates by dovetail grooves of a non-magnetic retention body over substantially the entire lengths. The permanent magnets are held in direct contact with the magnetic-pole members so as to be interposed therebetween. Thus, the magnet retention structure which is mechanically rigid and magnetically highly efficient even when increased in size can be obtained.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: November 26, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Inoue, Yoichi Kuroda, Masao Morita, Moriyuki Hazeyama
  • Publication number: 20130221789
    Abstract: A rotor for an inner-rotor modulated pole machine, the rotor being configured to generate a rotor magnetic field for interaction with a stator magnetic field of a stator of the modulated pole machine, wherein said rotor is adapted to rotate around a longitudinal axis of the rotor; wherein the rotor comprises a plurality of permanent magnets arranged circumferentially around the longitudinal axis, each permanent magnet being magnetised in a direction of magnetisation so as to generate a magnetic flux; a plurality of axial flux guiding members each adapted to provide an at least two-dimensional flux path for the magnetic flux generated by a respective one of the plurality of permanent magnets; a support structure comprising an inner tubular support member arranged radially inward of the plurality of permanent magnets; and at least one outer flux guiding member adapted to provide a path in at least a radial direction.
    Type: Application
    Filed: September 14, 2011
    Publication date: August 29, 2013
    Applicant: HOGANAS AB (publ)
    Inventors: Glynn Atkinson, Alan Jack, Lars-Olov Pennander
  • Patent number: 8035273
    Abstract: A rotor for an electric machine having a number of poles includes a shaft that extends along a portion of an axis and defines an outer surface. A first core portion is formed as a single inseparable component and includes a first portion that extends from the outer surface to a first outside diameter to define a first thickness, and a second portion spaced axially from the first portion that includes a reduced back portion that extends from an inside diameter to the first outside diameter to define a second thickness that is less than the first thickness. A second core portion is connected to the first core portion and includes a second outside diameter that is substantially the same as the first outside diameter.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: October 11, 2011
    Assignee: A.O. Smith Corporation
    Inventors: Dan M. Ionel, Stephen J. Dellinger, Robert J. Heideman, Alan E. Lesak
  • Patent number: 7994684
    Abstract: An automotive generator that includes a Lundell rotor. First and second protruding portions are disposed so as to project from inner wall surfaces of portions of first and second yoke portions at root portions of first and second claw-shaped magnetic pole portions, and first and second recess portions are recessed into inner wall surfaces of portions of the first and second yoke portions that face the second and first protruding portions. In addition, a shape of a region in which the field coil is disposed is configured into a wave shape that has a cross-sectional shape in a plane that includes a central axis of the pole core that is approximately constant in a circumferential direction and that zigzags alternately in an axial direction at positions of each of the first and second claw-shaped magnetic pole portions.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: August 9, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Inoue, Kouki Naka, Hiroyuki Akita, Kanji Shinkawa, Yoshinori Miyamoto, Toshiyuki Yoshizawa, Haruyuki Kometani
  • Patent number: 7876019
    Abstract: A device for generating electrical or mechanical output, comprising a stator coil, a stator assembly, a rotor coil, a rotor assembly rotational about an axis, the rotor assembly at least partially surrounding the rotor coil, rotator extensions capable of induced magnetization and extending from the rotator, each rotator extension having a rotor extension surface, wherein magnetic flux leakage between the rotator extension surfaces is prevented or reduced via permanent magnet elements located at the rotator extension surfaces. Stator and rotor may be reversed in operation.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: January 25, 2011
    Assignee: Motor Excellence, LLC
    Inventor: David Gregory Calley
  • Patent number: 7843107
    Abstract: A dynamoelectric machine including first and second permanent magnets held by first and second magnet seats on first and second yoke portions so as to face inner circumferential surfaces of tip end portions of first and second claw-shaped magnetic pole portions. The first and second permanent magnets are magnetically oriented in a reverse direction to orientation of a magnetic field that the field coil produces. The dynamoelectric machine enables permanent magnet holding reliability to be increased, induced voltage during no-load de-energization to be suppressed, and thermal demagnetization of magnets due to high-frequency magnetic fields that are induced by stator slots to be avoided.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: November 30, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Inoue, Kanji Shinkawa, Masao Morita, Haruyuki Kometani, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Keiichi Ito, Takeshi Mori, Hiroyuki Akita, Yoshinori Miyamoto, Shinji Nishimura