Interfitting Or Claw Tooth Rotors Patents (Class 310/263)
  • Patent number: 10790734
    Abstract: A rotor of a rotating electric machine includes a field core having a cylindrical boss portion, and a plurality of claw-shaped magnetic pole portions that are arranged on the outer side of the boss portion and form poles of alternately different polarities in the circumferential direction, a field winding that is wound around the outer periphery of the boss portion and generates a magnetomotive force by energization, a permanent magnet disposed between the circumferentially adjacent claw-shaped magnetic pole portions so as to have its easy axis of magnetization oriented in the circumferential direction and have its polarity coincide with the polarity of the claw-shaped magnetic pole portions which alternately appears by excitation, and a magnetic flux short circuit member having a short circuit portion that magnetically connects the claw-shaped magnetic pole portions circumferentially arranged to have different polarities.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: September 29, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yuki Takahashi, Tomokazu Hisada
  • Patent number: 10630122
    Abstract: A rotor of a motor includes first and second rotor cores, a field magnet, and a commutator magnet. The first and second rotor cores each include a core base and a plurality of claw poles. The claw poles of the first rotor core and the claw poles of the second rotor core are alternately arranged in a circumferential direction. The field magnet is located between the core bases. The field magnet is magnetized in an axial direction so that the claw poles of the first rotor core and the claw poles of the second rotor core function as different magnetic poles in the circumferential direction. The commutator magnet is located on an outer circumference of the field magnet around the claw poles. The commutator magnet is magnetized so that surfaces having the same polarity face each other between the claw poles and the commutator magnet.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: April 21, 2020
    Assignee: Denso Corporation
    Inventors: Yoji Yamada, Chie Morita
  • Patent number: 10536044
    Abstract: The present invention provides a rotor assembly comprising: a rotor including a core body, and a plurality of protrusion parts coupled to the core body so as to be detachable therefrom; and an insulator including a body encompassing the protrusion parts, and blades formed to protrude from the upper and lower surfaces of the body, thereby providing an advantageous effect of reducing the number of parts to be manufactured such that manufacturing costs and manufacturing processes can be reduced.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: January 14, 2020
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Joung Ho Lee
  • Patent number: 10486784
    Abstract: In a rotating electrical machine apparatus, a rotor portion provided in a cylindrical portion and a stator portion provided in a recessed portion in which the rotor portion is housed are aligned along the rotation axis of a rim such that a force is generated in a direction opposite to the direction of a load that acts along the rotation axis of the rim of loads that act on the rim following rotation of a blade.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: November 26, 2019
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takayoshi Suzuki, Ryoma Matsuo, Satoshi Ishikawa, Noriyoshi Hiraoka
  • Patent number: 10479489
    Abstract: A rotary device comprises a frame with a guide for flowing medium, a rotor with a number of blades, whereby a relation is obtained between the flowing medium and the rotation of the rotor, and energy converting means, the one part of which is connected to the frame and the other part to the rotor. The device has the feature that the end zones of the blades are connected to a ring, the ring has a radial section with the shape of an isosceles triangle or trapezium, the medium guide has an encircling recess, the form of which corresponds to the form of the ring and the ring fits with clearance into the recess, permanent magnets are added to the truncated conical surfaces, electromagnets debouch on both the corresponding surfaces of the recess, this such that the ring and the frame together form an annular induction motor or an electric generator.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: November 19, 2019
    Assignee: ECO-LOGICAL ENTERPRISES B.V.
    Inventor: Augustinus Wilhelmus Maria Bertels
  • Patent number: 10298084
    Abstract: A rotating electric machine including a stator including a stator core and a stator coil wound around the stator core, and a rotor including a rotor core arranged coaxially and radially in a face-to-face relationship with the stator core and a field coil wound around the rotor core. Both axial end portions of the rotor core project more axially outward than respective axial end faces of the stator core. The rotor core has a cutout surface between one of the axial end faces of the rotor core and an outer peripheral surface of the rotor core. A corner at which the cutout surface and the outer peripheral surface intersect is not more axially outward than either of the axial end faces of the stator core.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: May 21, 2019
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 10263482
    Abstract: Cracking and flying around of permanent magnets in a permanent magnet embedded-type rotating electric machine is prevented. Thermally hardening FRP is used as a reinforcement sheet, and the reinforcement sheet is wrapped around the periphery of a permanent magnet and caused to adhere to the surface of the permanent magnet by being thermally hardened. Subsequently, the permanent magnet to which the reinforcement sheet is adhering is embedded in magnet embedding holes of the rotor. The surface of the reinforcement sheet after thermal hardening is in a state of not being attached to the inner wall surface of the magnet embedding holes. Consequently, no stress caused by the difference between the linear expansion coefficients of the rotor and permanent magnets acts on the permanent magnets when the temperature of the rotor rises, and cracking of the permanent magnets can thus be prevented.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: April 16, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Toshiharu Mochida, Takashi Sakiyama, Masao Shuto, Toshiya Sasaki, Hirofumi Nishimura, Takeshi Iwamoto, Yuji Nakazaki, Takasumi Chikazawa, Keizou Kato
  • Patent number: 10193404
    Abstract: Rotor an alternator or alternator-starter type comprises two pole wheels including a series of axial claws having a generally trapezoidal shape that extend axially from the edge of the outer radial end of one pole wheel towards the other pole wheel. The rotor comprises an interpolar magnetic assembly in the interpolar space between a first claw of a first pole wheel and a second claw of a second pole wheel. The magnetic assembly comprises two first faces defined by first and second free ends. A side face is also provided, such that the adjacent side face faces same, the side face comprising third and fourth opposing ends between which the magnet is in contact. The side faces of the first and second claws define a reduction in cross-section from one of the free ends of the magnetic assembly extending towards a claw head end along a side facet.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: January 29, 2019
    Assignee: VALEO EQUIPEMENTS ELECTRIQUES MOTEUR
    Inventors: Henri Delianne, Pierre-Yves Bilteryst
  • Patent number: 10056801
    Abstract: The present invention concerns a protective cover (400) designed to cover power, filtering and control modules of an electronic assembly for a rotating electric machine for a motor vehicle.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: August 21, 2018
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Manuel Falguier, Fabien Guerin, Alexis Hosni, Michel Fakes, Yannick Le-Meitour, Philippe Baudesson
  • Patent number: 9960657
    Abstract: A rotating electrical machine, in particular to an alternator (A) or to an alternator-starter, for a motor vehicle, comprising: a rotor (2) supporting a front fan (23) at the front and a rear fan (24) at the rear, the rotor being rotatable about an axis of rotation, a stator (4) comprising a stator body and at least one winding placed on the stator body, the winding forming front and rear chignons on either side of the stator body, and a casing (1) in which the stator and the rotor are placed.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: May 1, 2018
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Michel Fakes, Jeremie Lutun, Dominique Caubert
  • Patent number: 9876416
    Abstract: Method for making an electrical machine (10), especially a three-phase generator for vehicles, that comprises a stator (16) and a rotor (20). The rotor (20) comprises a first and a second claw pole (22, 23) from which claw pole fingers (24) respectively extend in the axial direction from claw pole roots (60). A centering point (74) for a tool is located on a rear radius (72) of the claw pole roots (60).
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: January 23, 2018
    Assignee: SEG Automotive Germany GmbH
    Inventors: Rolf Eckert, Horst Fees
  • Patent number: 9831733
    Abstract: A coil bobbin for a brushless alternator includes an integrally formed one piece bobbin body that has a first end, a second end and a central passage that extends from the first end to the second end. A coil support portion of the body is positioned at the first end and has a first cylinder of a first diameter bordered by flanges which extend past the first cylinder. A base portion of the body is positioned at the second end. A bobbin extension portion is positioned between the coil support portion and the base portion. The bobbin extension portion includes a second cylinder of a second diameter which is smaller than the first diameter.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: November 28, 2017
    Assignee: All-Tek Maintenance Ltd.
    Inventors: Dale E. Benson, Ronald J. Heidel
  • Patent number: 9824806
    Abstract: A coil includes a wound body and a resin covering. The wound body is configured by winding a conductor. The wound body is pressure-molded. The resin covering covers a surface of the wound body.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: November 21, 2017
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tsuyoshi Nonaka, Masayuki Hirayama, Haruki Yahara
  • Patent number: 9800117
    Abstract: A self-cooled motor includes a rotor holder including a cylindrical portion and a bottom plate portion, and configured to rotate with a shaft; a housing supporting a bearing and a stator; and at least one blade rotating together with the shaft to generate an air current traveling radially outward, at least a portion of each blade being located axially below the bottom plate portion of the rotor holder. The housing includes a base portion axially above the rotor holder and an outlet edge portion in the housing and between adjacent ones of the attachment portions, and configured to define a main air outlet axially below, the main air outlet connecting a space radially inside the housing and a space radially outside the housing with each other. The bottom plate portion of the rotor holder includes a rotor vent hole passing therethrough in an axial direction.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: October 24, 2017
    Assignee: NIDEC CORPORATION
    Inventor: Yusuke Iwai
  • Patent number: 9758245
    Abstract: A rotor drive for a tail rotor of a helicopter is provided. The system includes a stator and a rotor mounted to the stator with a rotatable central carrier. Rotor blades are radially attached to the rotatable central carrier and each of the rotor blades is pivotable about their respective radial central axis for variation of blade pitch. At least one permanent magnet is provided on each rotor blade. A plurality of electromagnets is provided on the stator close enough to allow inductive interaction between the plurality of electromagnets and the at least one permanent magnet on each rotor blade. The permanent magnets are offset from the radial central axis in a direction perpendicular to the rotation plane for individual pitch control of the rotor blades by individual control of electric supply to the electromagnets.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: September 12, 2017
    Assignee: AIRBUS HELICOPTERS DEUTSCHLAND GMBH
    Inventor: Tobias Ries
  • Patent number: 9755464
    Abstract: A rotor includes a rotating shaft and a pair of first and second pole cores fixed on the rotating shaft. Each of the first and second pole cores includes a plurality of magnetic pole claws each having a root portion and a distal end. Each of the magnetic pole claws are configured to have a constant circumferential width at the root portion and taper from the root portion to the distal end. The magnetic pole claws of the first pole core are arranged alternately with those of the second pole core in a circumferential direction of the rotating shaft. Further, at least part of the magnetic pole claws of the first and second pole cores each have at least one chamfered portion formed at a circumferential end of the root portion of the magnetic pole claw so as to extend parallel to an axial direction of the rotating shaft.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: September 5, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yosuke Sekiyama, Nobuhiro Asano
  • Patent number: 9705384
    Abstract: A rotor is provided for a rotating electric machine. The rotor includes a magnetic pole core and a cooling fan. The cooling fan includes a base plate laser-welded to an axial end face of the magnetic pole core and a plurality of fan blades extending from the base plate. Further, in the rotor, a weld formed between the base plate of the cooling fan and the magnetic pole core has a pair of open ends.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: July 11, 2017
    Assignee: DENSO CORPORATION
    Inventors: Hiroo Kaizu, Seiji Kondoh, Shigenobu Nakamura
  • Patent number: 9676460
    Abstract: Propulsion unit (11) for propulsion and maneuvering of a maritime vessel, which includes a nozzle (12) wherein a propeller section (13, 13a) is arranged, which propeller section (13, 13a) is electrically or hydraulically driven, which propulsion unit (11) includes a fastening device (16) arranged for arrangement to hull of the vessel or to a steering device arranged for steering and/or moving the propulsion unit (11). The fastening device (16) is formed by two stems (17a-b) extending in parallel or laterally reversed about an vertical central axis from an upper surface of the nozzle (12) of the propulsion unit, which stems (17a-b) end in a fixing flange (18) for thereby providing an opening (19) which provides the propulsion unit (11) with improved hydrodynamic performance.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 13, 2017
    Assignee: Rolls-Royce Marine AS
    Inventor: Steinar Aasebö
  • Patent number: 9647510
    Abstract: A cooling jacket (14) for cooling an electric motor, in particular a stator (23), wherein a first spiral line (16) for transporting a coolant is formed at least partially on the cooling jacket (14). The aim of the invention is to provide a cooling system that is optimized in terms of mounting space and ensures axially equalized cooling. This aim is achieved in that a second spiral line (17) for transporting coolant is formed at least partially, and in that based on a common spiral axis R, both spiral lines (16, 17) form an axially integrated double spiral, wherein the first spiral line (16) is an inflow line and the second spiral line (17) is a return flow line. The invention further relates to a deflection unit (12) for the return into the second line (17), which substantially prevents the static pressure from dropping.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: May 9, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Raphael Fischer, Tobias Vogler
  • Patent number: 9502944
    Abstract: An electric machine component includes a rotor assembly having a body provided with a number of pole members and a central hub. The body includes at least one mounting member projecting radially outwardly of the central hub. A fan member is mounted to the rotor. The fan member includes a hub portion and a number of fan blades projecting radially outwardly from the hub portion. The fan member includes at least one mounting element extending radially outwardly of the hub portion. The at least one mounting element is configured and disposed to engage with the at least one mounting member to radially and axially constrain the fan member to the rotor.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: November 22, 2016
    Assignee: REMY TECHNOLOGIES, L.L.C.
    Inventors: Kirk Neet, David Maley, Scott Bitzer, Chad Zook
  • Patent number: 9444312
    Abstract: A metal plate is insert-molded into a case so as to be exposed inside a B terminal mounting aperture so as to overlap with a busbar, a B terminal bolt is press-fitted from an opposite side from the busbar into a press-fitting aperture that is formed on the portion of the metal plate that is exposed inside the B terminal mounting aperture, a spacer and a nut are mounted onto a shaft portion of the B terminal bolt, and the nut is electrically connected to the busbar by the busbar being pressed and held between the spacer and the nut by a fastening force from the nut.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: September 13, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiko Fujita, Yoshinobu Utsumi
  • Patent number: 9379582
    Abstract: A motor includes a shaft, a rotor, and a stator. The rotor includes first and second rotor cores, and a field magnet. Second claw magnetic pole portions of second rotor core are arranged between first claw magnetic pole portions of the first rotor core. The field magnet causes the first claw magnetic pole portions to function as first magnetic poles, and the second claw magnetic pole portions to function as second magnetic poles. Radially inner surfaces of the teeth of a stator core face radially outer surfaces of the first and second claw magnetic poles. Either radially outer surfaces of the first and second claw magnetic pole portions or radially inner surfaces of the teeth each have a cross-sectional shape in a direction orthogonal to the axial direction that is not concentric to a circle of which center is an axis of the rotation shaft.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: June 28, 2016
    Assignee: ASMO CO., LTD.
    Inventors: Koji Mikami, Yoji Yamada, Shigemasa Kato
  • Patent number: 9312740
    Abstract: The invention relates to devices including rotary units and rotary mechanisms that are suitable for use in numerous applications. Rotary units typically include rotational components that are configured to rotate. In some embodiments, for example, multiple rotary units are assembled in rotary mechanisms such that neighboring pairs of rotational components counter-rotate or contra-rotate relative to one another during operation of the rotary mechanisms. Rotational components generally include one or more implements that are structured to perform or effect one or more types of work as the rotational components rotate relative to one another in a given rotary mechanism. In certain embodiments, implements are configured to rotate and/or to effect the movement of other components as rotational components rotate.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 12, 2016
    Inventor: Christopher C. Sappenfield
  • Patent number: 9306424
    Abstract: A rotor for a rotary electric machine includes a pair of Lundell-type cores, a plurality of magnets, and a magnet retainer. The pair of Lundell-type cores includes a plurality of claw poles with flange portions projecting to a circumferential direction of the rotor from an end portion on an outer diameter side of each of the claw poles. The plurality of magnets are arranged between the pair of Lundell-type cores, and are magnetized in a direction of reducing flux leakage. The magnet retainer retains each of the magnets, and has side surfaces in the circumferential direction. At least one of the side surfaces is provided with at least one projection for restraining movement of the magnet retainer in an axial direction along a rotary shaft.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: April 5, 2016
    Assignee: DENSO CORPORATION
    Inventors: Hiroyuki Tsuchiya, Koji Kondo
  • Patent number: 9276444
    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: Grant
    Filed: February 7, 2013
    Date of Patent: March 1, 2016
    Assignee: Asmo Co., Ltd.
    Inventors: Chie Morita, Yoji Yamada
  • Patent number: 9166449
    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: February 7, 2013
    Date of Patent: October 20, 2015
    Assignee: Asmo Co., Ltd.
    Inventor: Chie Morita
  • Patent number: 9140265
    Abstract: A blower includes an air pump and a motor. The pump includes an impeller and a casing housing the impeller. The casing includes a casing inlet through which air is drawn in and a casing outlet through which the air is expelled by the impeller. The motor is arranged at the casing outlet and includes a stator and a rotor. The stator includes a stator core and a plurality of coils. The stator core includes a substantially ring-shaped yoke and a plurality of teeth extending inwards from the yoke. Each coil is wound around the yoke and is partially sandwiched between two adjacent teeth. The impeller is driven by the rotor.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: September 22, 2015
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Yue Ll, Mao Xiong Jiang, Jian Zhao, Zhi Jun Wang, Ke Yan, Yong Wang
  • Patent number: 9099912
    Abstract: An electromagnetic coupling comprises a stator, a first rotor in which a first polar tooth and a second polar tooth are provided along a circumferential direction in an alternating manner, and a second rotor. The first rotor comprises a first polar tooth ring in which a plurality of the first polar teeth are provided along a circumferential direction with a gap therebetween, and a second polar tooth ring in which a plurality of the second polar teeth are provided along a circumferential direction with a gap therebetween, and which is placed opposing the first polar tooth ring such that the second polar teeth are placed in respective gaps between adjacent ones of the first polar teeth.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: August 4, 2015
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Eiji Tsuchiya, Takao Watanabe, Wataru Hijikata
  • Patent number: 9099904
    Abstract: An electric machine includes a stator and a rotor configured to rotate about an axis of rotation in a direction of angular rotation. The rotor includes a first claw-pole segment and an opposing second claw-pole segment. The first claw-pole segment includes a plurality of fingers extending from an end ring. Each finger includes a distal end and a proximal end with the proximal end fixed to the end ring. Each finger also includes an interior side and an exterior side with the exterior side facing the stator. A leading side and a trailing side are defined on each finger by the direction of angular rotation. A chamfer is formed on the exterior trailing side of each finger at the proximal end of the finger.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: August 4, 2015
    Assignee: Remy Technologies, LLC
    Inventor: Michael D. Bradfield
  • Patent number: 9093887
    Abstract: A bicycle generator hub stator has a hub shaft, an annular member and three yokes. The annular member includes a first axial end, a second axial end and a through hole extending between the first and second axial ends. The hub shaft extends through the through hole. The first and second yokes are non-rotatably arranged relative to the annular member. The third yoke is non-rotatably connected to both the annular member and the hub shaft. The first yoke includes a first extended section that extends in an axial direction from the first axial end to the second axial end of the annular member. The second yoke includes a second extended section that extends in the axial direction from the second axial end to the first axial end of the annular member. The third yoke is disposed in the through hole and magnetically couples the first and second yokes together.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 28, 2015
    Assignee: Shimano Inc.
    Inventor: Hiroshi Hasegawa
  • 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: 9013079
    Abstract: The present invention relates to a permanent magnet generator for outputting a stabilized electromotive force. More specifically, the permanent magnet generator for stabilizing an electromotive force outputs an electromotive force stably according to the rotation speed of a motor and stabilizes the wave form of the electromotive force to be close to sine waves.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: April 21, 2015
    Inventor: Tae whan Do
  • Patent number: 9006954
    Abstract: A rotor includes: a plurality of first magnetic pole members that are disposed such that first end portions and second end portions are respectively coupled magnetically and mechanically to a first magnetic end plate and to a second magnetic end plate and so as to be separated from a magnetic intermediate plate magnetically; a plurality of second magnetic pole members that are disposed such that intermediate portions are coupled magnetically and mechanically to the magnetic intermediate plate and so as to be separated from each of the magnetic end plates magnetically; a plurality of permanent magnets that are disposed between the first and second magnetic pole members in a circumferential direction; and a nonmagnetic holding body for separating the first magnetic pole members magnetically from the magnetic intermediate plate, and for separating the second magnetic pole members magnetically from the magnetic end plates.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: April 14, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masao Morita, Masaya Inoue, Yoichi Kuroda, Moriyuki Hazeyama, Kanji Shinkawa
  • 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
  • Patent number: 8981612
    Abstract: A rotor is provided with a first rotation member having a plurality of first claw poles in a circumferential direction and a second rotation member having a plurality of second claw poles in a circumferential direction. By of fitting each second claw pole in a cutout portion between first claw poles and by fitting each first claw pole in a cutout portion between second claw poles, the first rotation member and the second rotation member are assembled to each other. At least either one of the first rotation member and the second rotation member is formed of a magnet. Based on a magnetic field generated by the magnet, the first claw poles and the second claw poles have alternating north poles and south poles in the circumferential direction.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: March 17, 2015
    Assignee: ASMO Co., Ltd.
    Inventors: Seiya Yokoyama, Yoji Yamada
  • 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: 8925402
    Abstract: An output shaft (14) of a starting device (1) is provided to equip a motor vehicle. This output shaft (14) comprises a mounting support (16), a driving element (17) on the mounting support (16) intended to transmit a rotation movement to a thermal engine, and a track (15) on the mounting support (16) intended to transmit a rotation movement to the mounting support (16), this track (15) being driven by a freewheel of a starter-head assembly of the starting device. The track (15) is attached and secured to the mounting support (16).
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: January 6, 2015
    Assignee: Valeo Equipements Electriques Moteur
    Inventor: Jean-Sebastien Metral
  • 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: 8884481
    Abstract: A stator is provided for a bicycle generator hub. The stator comprises a coil bobbin and a plurality of first and second yokes. The first and second yokes are radially arranged on opposite axial ends of the bobbin. Each of the first and second yokes includes a magnetic pole section extending along an axial direction of the coil bobbin and facing the external circumferential surface of the coil bobbin, an insertion section t extending along the axial direction of the coil bobbin and facing the internal circumferential surface of the coil bobbin, and a connecting section extending radial direction of the coil bobbin and connecting the first magnetic pole section and the first insertion section together. The insertion sections of the first yokes have first end portions that abut two corresponding ones of second end portion of the insertion sections of the second yokes.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: November 11, 2014
    Assignee: Shimano Inc.
    Inventor: Hiroshi Hasegawa
  • Publication number: 20140300234
    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: Application
    Filed: November 20, 2013
    Publication date: October 9, 2014
    Applicant: Remy Technologies, LLC
    Inventor: Michael D. Bradfield
  • Patent number: 8847446
    Abstract: A rotor arrangement for an electric machine comprises a rotor shaft and a rotor segment coupled to the rotor shaft. The rotor segment includes a main body and a collar integral with the main body. The collar includes an outer peripheral groove adjacent to the main body portion of the rotor segment. The rotor arrangement further includes a cooling fan that has a center opening defined by an inner perimeter. The center opening of the fan is configured to slidably engage the collar and is adjustable between an insertion diameter and a locking diameter. When the center opening is at the locking diameter, at least a portion of the inner perimeter of the fan extends into the outer peripheral groove in the collar such that the fan is retained on the rotor segment.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 30, 2014
    Assignee: Remy Technologies LLC
    Inventor: David E. Maley
  • Patent number: 8841809
    Abstract: A synchronous multipolar brushless machine includes an immobile stator armature and field windings, which are placed concentrically around a shaft and radially inwardly positioned relative to the stator armature, on a power unit carrying disc, so that the field windings and armature windings form a mechanically connected unit which generates an excitation magnetic field, and in which an alternate voltage is generated. The excitation magnetic field is transferred to a rotor via labyrinth shaped first and second air gaps. A multipolar rotating magnetic field is generated around the stator armature while the synchronous machine is operated, thereby magnetizing the rotor. In order to reduce magnetic flux resistance, a ferromagnetic tolerance ring is inserted in each first and second air gap. Alternatively, a ferrofluid is provided in each first and second air gap, which significantly increases the magnetic conductivity.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: September 23, 2014
    Inventor: Daniel Zrno
  • Patent number: 8819921
    Abstract: There are provided a process of forming a recess groove having a depth shallower than and a width larger than the notch groove for fracturing at a portion of fracturing and splitting in the permanent magnet; a process of forming the notch groove for fracturing the permanent magnet in a groove bottom of the recess groove formed in the recess-groove forming process; and a process of fracturing and splitting the permanent magnet along the notch groove so as to obtain magnet pieces.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: September 2, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Shuuji Adachi
  • Patent number: 8816564
    Abstract: A brushless alternator of the present invention includes: a yoke whose inner circumferential surface is radially opposite via an air gap to a rotor revolvably supported by brackets; a stator supported by the brackets, for forming a magnetic circuit along with the rotor and the yoke; a bobbin for engaging with the outer circumferential surface of a thin portion of the yoke; a field coil wound around the bobbin, for producing magnetic flux; and a plate joined to the thin portion, for axially holding the bobbin; wherein the thin portion of the yoke and the other portion thereof are integrally formed in one piece using a single member.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: August 26, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideyuki Hayashi, Yasuhiko Sugitani, Tomoki Takahashi
  • Patent number: 8810101
    Abstract: An AC alternator for a vehicle has a rotor having a pair of pole cores, and a stator. A plurality of claw magnetic pole parts are formed in the pole cores. A permanent magnet is placed between a pair of the claw magnetic pole parts so as to prevent leakage of magnetic flux through the area between the adjacent claw magnetic pole parts. The stator and the rotor are placed in the AC alternator so that the stator faces the rotor at a spacing of predetermined intervals. Flanges are formed at both sides of each of the claw magnetic pole parts. The presence of the flanges fixes the permanent magnets to the pole cores, and prevents them from moving toward the outer radius direction measured from the rotary shaft of the rotor. In particular, the thickness of each of the flange parts is increased from the front end part to the bottom part thereof.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: August 19, 2014
    Assignee: Denso Corporation
    Inventor: Koji Kondo
  • 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
  • Patent number: 8786161
    Abstract: A motor in which drive current supplied to a winding is controlled in accordance with a rotational position of a rotor detected from a waveform of an induced voltage between phases. The motor is provided with a stator including 3×n teeth and windings for three phases. A rotor includes a rotor core, an n number of magnets, and an n number of salient poles. The magnets function as one of the magnetic poles, the salient poles function as the other one of the magnetic poles. Each salient pole is spaced apart by a gap from the adjacent ones of the magnets in the circumferential direction. The magnets and gap are arranged inward in the radial direction from the rotor core. An electrical angle between two ends of each magnet is set to be smaller than an electrical angle between two ends of each salient pole.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: July 22, 2014
    Assignee: ASMO Co., Ltd.
    Inventors: Yoshiaki Takemoto, Toshihiro Uchida, Seiya Yokoyama, Shigemasa Kato
  • Publication number: 20140175939
    Abstract: A rotor includes a rotating shaft and a pair of first and second pole cores fixed on the rotating shaft. Each of the first and second pole cores includes a plurality of magnetic pole claws each having a root portion and a distal end. Each of the magnetic pole claws are configured to have a constant circumferential width at the root portion and taper from the root portion to the distal end. The magnetic pole claws of the first pole core are arranged alternately with those of the second pole core in a circumferential direction of the rotating shaft. Further, at least part of the magnetic pole claws of the first and second pole cores each have at least one chamfered portion formed at a circumferential end of the root portion of the magnetic pole claw so as to extend parallel to an axial direction of the rotating shaft.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 26, 2014
    Applicant: DENSO CORPORATION
    Inventors: Yosuke SEKIYAMA, Nobuhiro ASANO
  • 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