Claw Poles/interfitting Poles/lundel Patents (Class 310/156.66)
  • Patent number: 11183911
    Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: November 23, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kenji Kitada
  • Patent number: 11063483
    Abstract: An electric motor includes: a rotary shaft member rotating about an axis; a rotor including a rotor core, which has an annular shape and is provided on the rotary shaft member, and a magnet provided on the rotor core; a stator including a stator core, which has an annular shape and is disposed at an interval from the rotor core in a radial direction that is a direction orthogonal to an axial direction of the rotary shaft member, and a stator coil wound around the stator core; a field yoke, which has an annular shape, includes the rotor and the staorm, and has a fixed relative positional relationship with the stator core; and a case member, which has a side wall extending in the axial direction to face an outer peripheral surface of the field yoke, the field yoke being fixed to the case member.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: July 13, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Hattori, Takeshi Kitayama
  • Patent number: 11043862
    Abstract: A rotor for an electric machine having posts extending partially or completely between end irons. Each end iron is formed of a single piece of magnetic material with the posts extending from it, including the other end iron where the posts extend completely between them. Magnets are arranged between the posts with poles facing the posts to concentrate flux. In order to prevent too much of the flux from being drawn into flux paths through the end irons, the total magnetic flux is made to exceed a saturation flux of at least a portion of the flux path. This may be achieved by using interdigitated posts extending only partially between the end irons to provide gaps in the flux path, by providing flux resistors in the end irons to reduce a saturation flux below the total flux, or by using high aspect ratio magnets or posts so that the magnetic flux exceeds a saturation flux of the posts or end irons.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: June 22, 2021
    Assignee: GENESIS ROBOTICS AND MOTION TECHNOLOGIES CANADA, ULC
    Inventor: James Brent Klassen
  • Patent number: 10608482
    Abstract: A method of manufacturing a stator core, the stator core that includes core pieces arranged in a circumferential direction about a central axis that extends in an up-down direction, the core pieces formed by stacking plate members, the plate members each including a core back portion extending in the circumferential direction, a tooth portion extending from the core back portion towards a first side in a radial direction, and a groove portion recessed from a surface on a second side of the core back portion in the radial direction towards the first side in the radial direction, the method of manufacturing the stator core including stamping out an individual piece including the core back portion and the tooth portion stamped out from an electromagnetic steel sheet, and forming the groove portion formed by punching a portion of the electromagnetic steel sheet.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: March 31, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Takeshi Honda, Hiroshi Kitagaki
  • Patent number: 10594189
    Abstract: An alternating current generator for vehicles includes a stator, a rotor having a Lundell type core and a magnetic field winding, first and second cooling fans which are fixed to an axial end surface of the Lundell type core and generate cooling air along with the rotation of the rotor, and a fan base which is disposed between the second cooling fan and the Lundell type core and regulates the cooling air. The Lundell type core includes a plurality of U-shaped clearances formed in the outer periphery of the axial end surface being circumferentially spaced apart from each other. The fan base includes a plurality of alternately and circumferentially disposed large-diameter portions and small-diameter portions, with at least one of the small-diameter portions being disposed axially confronting a U-shaped clearance.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: March 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yoshinori Hashimoto, Mikio Mashino, Kouichi Akita
  • Patent number: 9774222
    Abstract: A rotor includes a field member arranged between a first core base of a first rotor core and a second core base of a second rotor core in the axial direction. When magnetized in the axial direction, the field member causes primary claw-shaped magnetic poles to function as primary magnetic poles and secondary claw-shaped magnetic poles to function as secondary magnetic poles. The field member is formed by placing a plurality of members one over another in the axial direction.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: September 26, 2017
    Assignee: ASMO CO., LTD.
    Inventor: Yoji Yamada
  • Patent number: 9577501
    Abstract: A rotor for a rotary electric machine, the rotor including first and second pole pieces each having a respective magnetic hub arranged for rotation about an axis along which they are spaced. Pluralities of magnetic first and second pole fingers are spaced from each other and extend between the hubs. Each pole finger has a proximal end connected to its respective hub, and an axially opposite distal end. The first and second pole fingers circumferentially alternate about the axis, and each pole finger has a respective radially inner surface defining a cavity that extends axially from the distal end to a cavity terminus. Relative to each pole finger, at a respective axial position between the distal end and the cavity terminus the radial distance between the axis and the radially inner surface is substantially greater inside of the cavity than outside of the cavity.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: February 21, 2017
    Assignee: Remy Technologies, LLC
    Inventor: Michael D. Bradfield
  • Patent number: 9577496
    Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and a detected portion. The first rotor core includes a first core base and a plurality of first claw-shaped magnetic pole portions. The second rotor core includes a second core base and a plurality of second claw-shaped magnetic pole portions. The first and second core bases face to each other, and the first and second claw-shaped magnetic pole portions are alternately arranged in the circumferential direction. The field magnet is located between the first and second core bases in the axial direction. The field magnet has the first claw-shaped magnetic pole portion function as a first magnetic pole and has the second claw-shaped magnetic pole portion function as a second magnetic pole. A detected portion, which generates a magnetic flux, is arranged at an outer axial end surface of the first rotor core.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: February 21, 2017
    Assignee: ASMO CO., LTD.
    Inventors: Shigemasa Kato, Yoji Yamada, Koji Mikami, Seiya Yokoyama
  • Patent number: 9502931
    Abstract: A brushless motor includes a first rotor core, a second rotor core, and a field magnet member. The first rotor core includes primary projecting pieces arranged along a circumferential direction at equal intervals. The second rotor core has the same shape as the first rotor core, and includes secondary projecting pieces arranged along the circumferential direction at equal intervals. The secondary projecting pieces are positioned between the primary projecting pieces that are adjacent to one another in the circumferential direction. The field magnet member is arranged between the first rotor core and the second rotor core. The field magnet member is magnetized along an axial direction to generate primary magnetic poles in the primary projecting pieces, and generate secondary magnetic poles in the secondary projecting pieces. A rotor includes the first rotor core, the second rotor core, and the field magnet member.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 22, 2016
    Assignee: ASMO CO., LTD.
    Inventor: Yoji Yamada
  • Patent number: 9502929
    Abstract: A rotor with a first rotor core, a second rotor core, a field magnet, and an interpole magnet is provided. The first rotor core has a first core base and a plurality of first nail-shaped magnetic pole parts that extend in the axis direction from the outer circumference section of the first core base. The second rotor core has a second core base and a plurality of second nail-shaped magnetic pole parts that extend in the axis direction from the outer circumference section of the second core base. The field magnet is magnetized along the axis direction and makes the first nail-shaped magnetic parts function as first magnetic poles and the second nail-shaped magnetic parts function as second magnetic poles. The interpole magnet is arranged between the first nail-shaped magnetic parts and the second nail-shaped magnetic parts. The interpole magnet has the same polarity as the first and second nail-shaped magnetic pole parts, in the sections where same face the first and second nail-shaped magnetic pole parts.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: November 22, 2016
    Assignee: ASMO CO., LTD.
    Inventors: Yoji Yamada, Chie Morita, Yuuki Fujii, Shigemasa Kato
  • Patent number: 9273691
    Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and an auxiliary magnet. The first rotor core includes a first core base and a plurality of first hook-shaped poles. The second rotor core includes a second core base and a plurality of second hook-shaped poles. The first and second hook-shaped poles are alternately arranged in a circumferential direction of the rotor. The field magnet is arranged between the first and second core bases in an axial direction. The field magnet cause the first hook-shaped poles to function as first poles and the second hook-shaped poles to function as second poles. The auxiliary magnet includes at least two interpolar magnet portions, which are integrally formed. Each interpolar magnet portion is arranged in a void between the first hook-shaped pole and the second hook-shaped pole and magnetized in the circumferential direction.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: March 1, 2016
    Assignee: ASMO, Co., Ltd.
    Inventors: Yoji Yamada, Chie Morita, Yoko Tateishi, Yuuki Fujii, Seiya Yokoyama
  • Patent number: 9239058
    Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and an auxiliary magnet. The first rotor core includes a first core base and a plurality of first hook-shaped poles. The second rotor core includes a second core base and a plurality of second hook-shaped poles. The first and second hook-shaped poles are alternately arranged in a circumferential direction of the rotor. The field magnet is arranged between the first and second core bases in an axial direction. The field magnet cause the first hook-shaped poles to function as first poles and the second hook-shaped poles to function as second poles. The auxiliary magnet includes at least two interpolar magnet portions, which are integrally formed. Each interpolar magnet portion is arranged in a void between the first hook-shaped pole and the second hook-shaped pole and magnetized in the circumferential direction.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: January 19, 2016
    Assignee: ASMO, Co., Ltd.
    Inventors: Yoji Yamada, Chie Morita, Yoko Tateishi, Yuuki Fujii, Seiya Yokoyama
  • Patent number: 9143013
    Abstract: A rotor having an axial direction includes at least a pair of rotor cores arranged in the axial direction, and a field magnet located between the rotor cores and magnetized in the axial direction. Each of the rotor cores includes a plurality of claw poles extending in the axial direction. Each of the rotor cores includes a magnetic flux controlling section, which appropriately causes a magnetic flux to flow to the claw poles.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: September 22, 2015
    Assignee: ASMO Co. Ltd
    Inventors: Yoji Yamada, Chie Morita, Yoshiaki Takemoto, Makoto Morisaki
  • Patent number: 9030073
    Abstract: The claw rotor (2) comprises: an axial symmetry axis (X-X); two magnet wheels having a core and teeth (9); insulation (11?) for a field coil (10) mounted onto the core; and permanent magnets mounted between two adjacent teeth (9) belonging to one and the other of the magnet wheels, wherein the insulation (11?) comprises a hub and a flange on each end of the hub (110), each flange having a plurality of projecting petals for engaging with the angled inner periphery (90) of a tooth (9). At least some petals of a flange (120) corresponding to the permanent magnets (38) are split into a plurality of portions, namely, a main petal (121a) for engaging with the inner periphery (90) of a tooth of the magnet wheel (8) in question and at least one side secondary petal (121b) that is lower, when seen in the radial direction, than the main petal. The rotating electrical machine comprises such a rotor. The invention is of use in a claw rotor for motor vehicle alternator or alterno-starter.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: May 12, 2015
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Virginie Leroy, Vincent Foveau
  • Patent number: 9018816
    Abstract: A rotor includes first and second rotor cores, a field magnet, interpole magnets and holding members. The first and second rotor cores each have claw-like magnetic poles arranged in the circumferential direction in an outer periphery of a core base at even intervals and formed to protrude radially outward. The field magnet is placed between the core bases in the axial direction of the rotor and magnetized in the axial direction to cause the magnetic poles of the first and second rotor cores to function as first and second magnetic poles, respectively. The interpole magnets are each arranged between a circumferentially adjacent pair of the magnetic poles and magnetized in the circumferential direction so as to have the same polarity as the magnetic poles, which are opposed thereto in the circumferential direction. The holding members hold the interpole magnets to restrict radially outward movement of the interpole magnets.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: April 28, 2015
    Assignee: ASMO Co., Ltd.
    Inventors: Yoji Yamada, Chie Morita, Yuu Mizoguchi
  • Patent number: 8987967
    Abstract: An AC claw-pole electric motor includes a casing, a stator connected with the casing, a rotor and two exciting parts. The rotor includes a rotor shaft (9), a center magnetic yoke (11), a first side magnetic yoke (8), a second side magnetic yoke (13), and claw poles (2, 3, 4, 5) provided on the center magnetic yoke (11), the first side magnetic yoke (8) and the second side magnetic yoke (13). The two exciting parts are respectively provided in spaces formed by the center magnetic yoke (11), the first side magnetic yoke (8), the second side magnetic yoke (13) and the claw poles (2, 3, 4, 5). The axial exciting magnetic fluxes of the two exciting parts are opposite in direction. Thus, the main magnetic flux and the magnetic energy product of the electric motor are increased, and the output and the operation efficiency of the electric motor at a low speed are improved.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: March 24, 2015
    Assignee: Jing-Jin Electric Technologies (Beijing) Co., Ltd.
    Inventors: Wei Cai, Liheng Wang
  • Publication number: 20150048708
    Abstract: A stator for an electric machine, the stator including a stator core and a winding. The stator core including an annular stator core back component providing a magnetic flux path in a circumferential direction and in an axial direction of the annular stator core back component; and a plurality of stator pole components each including a mounting part mounted to the stator core back component, an interface part defining an interface surface facing an active air gap between the stator and a rotor of the electrical machine; and a radially oriented tooth part extending radially from the annular stator core component and connecting the interface part with the mounting part.
    Type: Application
    Filed: March 8, 2013
    Publication date: February 19, 2015
    Inventors: Göran Nord, Jamie Washington
  • Patent number: 8933610
    Abstract: A rotor includes at least one of a group of one or more auxiliary magnets that are located between first and second claw poles in a circumferential direction and magnetized to be magnetic poles of the same polarity as the first and second claw poles and another group of one or more auxiliary magnets that are located on a rear side of the first and second claw poles and magnetized to have radially outer portions of the same polarity as the first and second magnetic poles. The auxiliary magnets are arranged to protrude beyond at least one of axial end surfaces of the first and second core bases.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: January 13, 2015
    Assignee: ASMO Co., Ltd.
    Inventors: Yoji Yamada, Chie Morita, Seiya Yokoyama
  • Patent number: 8901789
    Abstract: Embodiments of the invention provide an electric machine module including an electric machine positioned with a housing. The brushless electric machine includes a center axis of rotation and a support member coupled to the housing. The module also includes a cooling system, which includes an inlet disposed through a portion of the housing, a first channel positioned within the support member that fluidly connects a second channel with the inlet. The housing also includes a drain aperture and a drain guide disposed substantially adjacent to the drain aperture.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: December 2, 2014
    Assignee: Remy Technologies, LLC
    Inventor: Chad Zook
  • Patent number: 8890386
    Abstract: A rotor includes first and second rotor cores and a field magnet placed between the first and second rotor cores. Each of the rotor cores has a main body portion and a plurality of extensions, which extend radially outward from the main body portion at equal intervals in the circumferential direction. The field magnet causes the individual extensions to function as magnetic poles. A magnetic pole constituting section including at least part of each of the extensions and the first main body portion of each rotor core are made of different materials, made of the same material but formed as separate elements, or includes regions having different properties.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: November 18, 2014
    Assignee: ASMO Co., Ltd.
    Inventors: Chie Morita, Yoji Yamada, Seiya Yokoyama
  • Patent number: 8878411
    Abstract: A permanent magnet motor, generator or the like that uses ceramic magnets in the rotor to concentrate the magnetic flux in the airgap. Poles are formed by pole plates with integral tabs forming north and south poles with magnetic separators therebetween. Magnet sections are stacked axially.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: November 4, 2014
    Assignee: LCDrives Corp.
    Inventors: Russel Hugh Marvin, Nigel Shepherd
  • Publication number: 20140252904
    Abstract: A motor includes a stator, a rotor and a case. The rotor includes a first rotor core, a second rotor core, and a field magnet. Each of the first rotor core and the second rotor core includes a core base and a plurality of claw poles. The field magnet is located between the core bases. The case includes a cylindrical yoke housing and a lid. To balance magnetic flux from the first rotor core with magnetic flux from the second rotor core, the distance between the rotor and the stator is varied from the distance between the rotor and the yoke housing or the teeth of the stator are shaped to enable magnetic saturation.
    Type: Application
    Filed: March 3, 2014
    Publication date: September 11, 2014
    Inventors: Koji MIKAMI, Shigemasa KATO, Yoji YAMADA, Seiya YOKOYAMA
  • Publication number: 20140225462
    Abstract: A rotor includes a first rotor core, a second rotor core, a permanent magnet and a resin layer. The first rotor core includes a first core base and first claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the first core base. The second rotor core includes a second core base and second claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the second core base. The first rotor core and the second rotor core are combined with each other so that the first and second core bases are opposed to each other and the first and second claw-shaped magnetic poles are alternately arranged in the circumferential direction of the rotor. The permanent magnet includes at least a main field magnet. The main field magnet is located between the first and second core bases in the axial direction, and is magnetized in the axial direction.
    Type: Application
    Filed: January 17, 2014
    Publication date: August 14, 2014
    Inventors: Yoji YAMADA, Chie MORITA, Seiya YOKOYAMA, Koji MIKAMI, Takahiro TSUCHIYA
  • Patent number: 8803396
    Abstract: The invention relates to a rotor assembly which is mounted such as to rotate around an axis of rotation (X-X?) and which comprises two magnet wheels with claws (10). The aforementioned magnet wheels are separated by an axial space and are disposed opposite one another. Moreover, each wheel (10) comprises an end shield (11) which is essentially perpendicular to the aforementioned axis (X-X?), and claws (12) extended axially from said end shield (11) towards the other wheel (10). The claws (12) of one wheel (10) are solidly connected to the end shield (11) by respective bases (121) which are separated from one another by peripheral spaces (13). The inventive assembly comprises at least one fan (30) which is positioned on an axial face of the end shield (11) of one of the wheels (10) opposite the other wheel (10), such that the fan (30) axially seals at least part of one of the peripheral spaces (13).
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: August 12, 2014
    Assignee: Valeo Equipements Electriques Moteur
    Inventor: Claudiu Vasilescu
  • Publication number: 20140203677
    Abstract: A rotor with four axially stacked rotor cores, and a plurality of field magnets interposed between them. Each rotor core includes a rotor-side claw-shaped magnetic pole. Each rotor-side claw-shaped magnetic poles are respectively extending from and formed on each rotor core at equal angle intervals. Tip end surfaces of the first and third rotor-side claw-shaped magnetic pole abut against or are closely opposed to each other axially. Tip end surfaces of the second and fourth rotor-side claw-shaped magnetic poles abut against or are closely opposed to each other in the axial direction. The plurality of field magnets are magnetized in the axial direction such that the field magnets causes the first and third rotor-side claw-shaped magnetic poles to function as first magnetic poles, and cause the second and fourth rotor-side claw-shaped magnetic poles to function as second magnetic poles.
    Type: Application
    Filed: January 21, 2014
    Publication date: July 24, 2014
    Inventors: Yoshiaki TAKEMOTO, Yusuke MORIMOTO, Masashi MATSUDA, Seiya YOKOYAMA
  • Patent number: 8760029
    Abstract: A rotary electric machine having a stator whose dismantled structure can be reintegrated at reduced cost. The stator eliminates difficulties in separation and reuse at the time of disposal incident to use of molding such as resin molding. Also, it has no adverse environmental impacts. A plurality of stator cores having a plurality of magnetic poles arranged at intervals in the circumferential direction are laminated in the axial direction with use of a heat-shrinkable tube having an appropriate compression retention force. The outer circumferences of these stator cores are covered collectively with another heat-shrinkable tube. The heat-shrinkable tubes are heated so that the plurality of stator cores are integrated into a single-piece structure by the heat-shrunk tubes.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: June 24, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Nagashima, Shuichi Ishizawa, Yuji Enomoto
  • Patent number: 8754561
    Abstract: A rotor with poles in the form of claws, of a rotary electrical machine. This rotor comprises a plurality of interpolar magnetic assemblies. On a radial cross-sectional plane, a first total magnet surface of a section of the magnetic assembly is smaller than a second surface defined by the product of the radial height of a face (h) of the magnetic assembly (40) which faces towards the polar claw (44a), and the circumferential distance between the polar claws (44a, 44b) in the interpolar gap. The magnet has at least one recess which extends in an axial direction.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: June 17, 2014
    Assignee: Valeo Equipements Electriques Moteur
    Inventor: Julien Masfaraud
  • Publication number: 20140139065
    Abstract: A brushless motor includes a rotor. The rotor includes a first rotor core, a second rotor core and a field magnet. The first rotor core includes a plurality of first magnetic pole portions arranged in a circumferential direction. The second rotor core includes a plurality of second magnetic pole portions arranged in the circumferential direction. The field magnet is arranged between the first rotor core and the second rotor core in an axial direction. When the field magnet is magnetized in the axial direction, the first magnetic pole portions function as first magnetic poles and the second magnetic pole portions function as second magnetic poles.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 22, 2014
    Inventors: Yoji YAMADA, Koji MIKAMI, Chie MORITA, Takahiro TSUCHIYA, Seiya YOKOYAMA, Takayoshi SUZUKI
  • Publication number: 20140139079
    Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and a detected portion. The first rotor core includes a first core base and a plurality of first claw-shaped magnetic pole portions. The second rotor core includes a second core base and a plurality of second claw-shaped magnetic pole portions. The first and second core bases face to each other, and the first and second claw-shaped magnetic pole portions are alternately arranged in the circumferential direction. The field magnet is located between the first and second core bases in the axial direction. The field magnet has the first claw-shaped magnetic pole portion function as a first magnetic pole and has the second claw-shaped magnetic pole portion function as a second magnetic pole. A detected portion, which generates a magnetic flux, is arranged at an outer axial end surface of the first rotor core.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 22, 2014
    Inventors: Shigemasa KATO, Yoji YAMADA, Koji MIKAMI, Seiya YOKOYAMA
  • Publication number: 20140049132
    Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and a back magnet. The first rotor core includes a disk-shaped first core base and a plurality of first claw-poles. The second rotor core includes a disk-shaped second core base and a plurality of second claw-poles. The field magnet has the first claw-poles function as first magnetic poles and the second claw-poles function as second magnetic poles. The back magnet is arranged along back surfaces of the first and second claw-poles. The back magnet is magnetized such that radially outer sections have the polarities that are the same as the first and second magnetic poles. The back magnet is formed integrally, has an annular shape, and is in contact with all of the back surfaces of the first and second claw-poles.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 20, 2014
    Applicant: ASMO CO., LTD.
    Inventor: Yoji YAMADA
  • Patent number: 8648508
    Abstract: A small electric motor is disclosed, such as a claw pole motor. An exemplary small electric motor includes a housing, a stator having at least two stator windings, a rotor having a rotational axis, and a flexible conductor foil for the electrical connection of the stator windings. The conductor foil includes winding connection contacts, external connection contacts and conductor paths between the winding connection contacts and the external connection contacts. Taps of the stator windings are electrically contacted with the winding connection contacts of the conductor foil. The conductor foil can be configured as an elongated strip having at least two connection portions which are arranged in spaced-apart relationship with each other and include winding connection contacts.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: February 11, 2014
    Assignee: Maxon Motor AG
    Inventors: David Ramon, Remo Hofstetter, Hugo Fritschy
  • 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
  • Publication number: 20130313938
    Abstract: A brushless motor includes a first rotor core, a second rotor core, and a field magnet member. The first rotor core includes primary projecting pieces arranged along a circumferential direction at equal intervals. The second rotor core has the same shape as the first rotor core, and includes secondary projecting pieces arranged along the circumferential direction at equal intervals. The secondary projecting pieces are positioned between the primary projecting pieces that are adjacent to one another in the circumferential direction. The field magnet member is arranged between the first rotor core and the second rotor core. The field magnet member is magnetized along an axial direction to generate primary magnetic poles in the primary projecting pieces, and generate secondary magnetic poles in the secondary projecting pieces. A rotor includes the first rotor core, the second rotor core, and the field magnet member.
    Type: Application
    Filed: March 15, 2013
    Publication date: November 28, 2013
    Inventors: Yoji YAMADA, Seiya YOKOYAMA, Yoshiaki TAKEMOTO, Chie MORITA, Koji MIKAMI
  • 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
  • Patent number: 8546994
    Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by ensuring outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on portions of yoke portions between respective circumferentially adjacent claw-shaped magnetic pole portions. Magnet holders are disposed so as to span over all of the trough portions on a pole core body at a rear end excluding a predetermined trough portion, and permanent magnets are held in each of the magnet holders. A field coil lead wire is led out from the rotor so as to pass through the trough portion over which a magnet holder is not disposed.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: October 1, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takeshi Mori, Masaya Inoue, Masao Morita, Hirokazu Akai, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Shinji Nishimura, Kazunori Tanaka
  • Publication number: 20130207502
    Abstract: A rotor includes a field member arranged between a first core base of a first rotor core and a second core base of a second rotor core in the axial direction. When magnetized in the axial direction, the field member causes primary claw-shaped magnetic poles to function as primary magnetic poles and secondary claw-shaped magnetic poles to function as secondary magnetic poles. The field member is formed by placing a plurality of members one over another in the axial direction.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 15, 2013
    Inventors: Yoji YAMADA, Chie MORITA
  • Publication number: 20130207503
    Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and an adhesive. The first rotor core includes a first core base, having a first magnet fixing surface, and a plurality of first claw-poles. The second rotor core includes a second core base having a second magnet fixing surface, and a plurality of second claw-poles. The field magnet includes a first axial end face and a second axial end face. At least one of the first magnet fixing surface and the first axial end face includes a first adhesive recess that receives an adhesive. At least one of the second magnet fixing surface and the second axial end face includes a second adhesive recess that receives the adhesive.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 15, 2013
    Inventors: Chie MORITA, Yoji YAMADA
  • Publication number: 20130154397
    Abstract: A high efficiency magnetic core electrical machine includes magnet and coil assemblies that may be axially stacked to form modules. The magnet sub-assemblies include magnet locators on which multiple permanent magnets are arranged, and the coil sub-assembly includes a pair of bobbin holders supporting multiple bobbins and magnetic cores that extend through the bobbins and through openings in the bobbin holders to form magnetic poles that face the permanent magnets. The permanent magnets and magnetic poles may be arranged in various zero-cogging configurations, including one in which the permanent magnets on opposite sides of the coil assembly are skewed relative to each other to cause cogging force cancellation. In addition, a power matching circuit may be used to optimize the output power of the electrical machine to rotor speed when the electrical machine is used as a generator.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Inventor: John T. SULLIVAN
  • Patent number: 8446064
    Abstract: A rotor (24) for a rotary electric machine (20), mainly for the automotive industry, has a front polar wheel (46N) and a rear polar wheel (46S). Each polar wheel (46N, 46S) includes claws (52) extending axially towards the other polar wheel (46N, 46S). Each claw (52) of the polar wheel (46N, 46S) is circumferentially interleaved between two claws (52) of the other polar wheel (46N, 46S). At least two interpolar gaps (62) are provided between the side faces (60) opposite two consecutive claws (52), and at least two members (68) defining a magnetic barrier are provided in two interpolar gaps (62) associated on either side of a predetermined claw (52D). The front longitudinal ends (72) of the two members (68) are connected by a connector (82) in order to define an open chain (80).
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: May 21, 2013
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Alexandre Pfleger, Olivier Gas
  • Publication number: 20130113323
    Abstract: A rotor having an axial direction includes at least a pair of rotor cores arranged in the axial direction, and a field magnet located between the rotor cores and magnetized in the axial direction. Each of the rotor cores includes a plurality of claw poles extending in the axial direction. Each of the rotor cores includes a magnetic flux controlling section, which appropriately causes a magnetic flux to flow to the claw poles.
    Type: Application
    Filed: October 29, 2012
    Publication date: May 9, 2013
    Applicant: ASMO Co., Ltd.
    Inventor: ASMO Co., Ltd.
  • Publication number: 20130106230
    Abstract: A rotor includes first and second rotor cores and a field magnet placed between the first and second rotor cores. Each of the rotor cores has a main body portion and a plurality of extensions, which extend radially outward from the main body portion at equal intervals in the circumferential direction. The field magnet causes the individual extensions to function as magnetic poles. A magnetic pole constituting section including at least part of each of the extensions and the first main body portion of each rotor core are made of different materials, made of the same material but formed as separate elements, or includes regions having different properties.
    Type: Application
    Filed: October 29, 2012
    Publication date: May 2, 2013
    Applicant: ASMO Co., Ltd.
    Inventor: ASMO Co., Ltd.
  • Publication number: 20130069471
    Abstract: A rotary electrical machine rotor having claw-shaped poles. The machine comprising a plurality of interpolar magnetic assemblies having at least two magnetic assemblies comprising different magnet grades.
    Type: Application
    Filed: March 18, 2011
    Publication date: March 21, 2013
    Inventors: Mostafa Kadiri, Stéphane Desenclos
  • Patent number: 8368282
    Abstract: A disk drive device includes: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a core that is fixed to the base and includes a circular portion and S salient poles (where S is a natural number greater than or equal to 3) extending from the circular portion in the diameter direction; a three-phase coil that is formed by being wound around each of the S salient poles; and a magnet that is fixed to the hub and faces the S salient poles in the diameter direction, and that is provided with P driving magnetic poles in the circumferential direction (where P is a natural number greater than or equal to 2).
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: February 5, 2013
    Assignee: Alphana Technology Co., Ltd.
    Inventors: Minoru Sano, Tetsuo Kitamura
  • Patent number: 8368274
    Abstract: Dynamoelectric machine having holding grooves recessed into yoke portions with openings on respective facing portions of inner wall surfaces of trough portions, at axially inner ends of the yoke portions, having axial groove directions, and an end surface in a groove length direction constitutes a stopping surface. Magnet material holders are disposed spanning the trough portions radially inside inner circumferential surfaces near tip ends of claw-shaped magnetic pole portions, fitted from axially inside into each holding groove, are recessed to face each other on the trough portions restricting circumferential and radial motion by inner wall surfaces of the holding grooves and axially outward movement restricted by the stopping surface.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: February 5, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Yoshizawa, Masaya Inoue, Ryuichi Shimomura, Takuma Wada, Kanji Shinkawa, Masao Morita, Yoshiharu Hayashi, Kazuya Nakamachi, Kazunori Tanaka
  • Patent number: 8334633
    Abstract: The present invention provides a dynamoelectric machine that enables heat that is generated in a permanent magnet to be transmitted to a fan and be radiated from the fan effectively, that suppresses occurrences of damage to the fan that result from centrifugal forces that act on the permanent magnet, and that also enables the fan to be prepared easily and inexpensively.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: December 18, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Moriyuki Hazeyama, Hiroyuki Akita, Ryuichi Shimomura, Masaya Inoue, Masao Morita, Toshiyuki Yoshizawa, Shinji Nishimura, Kazunori Tanaka
  • Patent number: 8324782
    Abstract: A bobbin is mounted to a rotor such that a rotation arresting portion is housed in a space that is formed by a rotation arresting portion housing recess portion and a stepped portion so as to restrict circumferential movement, and a permanent magnet is made into a quadrangular prism that has a rectangular bottom surface, and is held by a magnet holding seat by placing a bottom surface on an upper surface of a magnet holding portion, and fixing to the magnet holding seat a cover that is mounted from radially outside to restrict circumferential, axial, and radial movement.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: December 4, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinichiro Minami, Kazunori Tanaka
  • Patent number: 8324780
    Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by disposing trough portions on yoke portions and disposing magnet holders that hold the permanent magnets so as to span the trough portions to ensure outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on respective portions of yoke portions between circumferentially adjacent claw-shaped magnetic pole portions, a magnet holder is disposed so as to span over a trough portion, and a permanent magnet is held by the magnet holder. A lead wire is led out of a rotor from a field coil so as to pass through a space that is bounded by the trough portion and the magnet holder.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: December 4, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Inoue, Masao Morita, Kanji Shinkawa, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Hirokazu Akai, Kazunori Tanaka, Shinji Nishimura, Hiroyuki Akita, Ryuichi Shimomura
  • Patent number: 8304951
    Abstract: The present invention provides a dynamoelectric machine that enables permanent magnets to be held stably in trough portions that are formed on portions of a yoke portion that are positioned between adjacent claw-shaped magnetic pole portions. In a dynamoelectric machine according to the present invention, first and second magnet holders are disposed so as to span first and second trough portions that are formed on portions of first and second yoke portions that are positioned between circumferentially adjacent first and second claw-shaped magnetic pole portions, and first and second permanent magnets are held by the first and second magnet holders so as to face inner circumferential surfaces near tip ends of the claw-shaped magnetic pole portions so as to have a predetermined clearance.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: November 6, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryuichi Shimomura, Hiroyuki Akita, Masaya Inoue, Toshiyuki Yoshizawa
  • Patent number: 8304950
    Abstract: A dynamoelectric machine that can suppress increases in rotor inertia to extend belt service life and increase field magnetomotive force to increase output. In the dynamoelectric machine, first and second magnetic guidance members are fitted into first and second holding grooves that are disposed so as to extend axially on facing portions of first and second trough portions radially outside inner wall surfaces, and are disposed so as to span over first and second trough portions. First and second permanent magnets that are magnetically oriented in a reverse direction to a magnetic field that originates from a field coil are fitted into and held by interfitting grooves of the first and second magnetic guidance members so as to face inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions so as to have a predetermined clearance.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: November 6, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyuki Yoshizawa, Masaya Inoue, Kanji Shinkawa, Masao Morita, Moriyuki Hazeyama, Takeshi Mori, Hiroyuki Akita, Ryuichi Shimomura, Kazunori Tanaka, Shinji Nishimura
  • Patent number: 8237323
    Abstract: An electrical rotating machine rotor, in particular for a motor vehicle, comprising a central shaft, an annular core coaxial with the shaft and two polar wheels which are axially arranged on either side of the core, of the type wherein the shaft includes at least one drive section which is axially force-fitted into a fixing bore of at least one component of the rotor so as to secure in rotation at least one of the two polar wheels of the rotor to the shaft, an intermediate sleeve being radially interposed between each polar wheel and the central shaft, and on which sleeve is mounted said polar wheel. The invention also concerns a method for making such a rotor.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: August 7, 2012
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Jean-Philippe Badey, Romaric Lenoir, Marc Tunzini, Pierre-Yves Bilteryst