Armature Or Primary Patents (Class 310/195)
  • Publication number: 20140210284
    Abstract: A motor includes a rotation shaft, a stator, and a rotor. The stator includes an armature winding and a stator core including a main core portion with an axial stack of core sheets and a magnetic plate on an end thereof. Each core sheet includes a tooth formation portion around which the armature winding is wound. The magnetic plate includes a stacked portion and an axially extending portion. The stacked portion stacked on the axial end of the main core portion and includes an end located toward the rotor. The axially extending portion extends toward the outer side in the axial direction from the end of the stacked portion located toward the rotor and is opposed to the rotor in a radial direction of the motor. The axially extending portion is shaped to be magnetically skewed in a circumferential direction relative to the tooth formation portion and the stacked portion.
    Type: Application
    Filed: January 23, 2014
    Publication date: July 31, 2014
    Inventors: Tatsunori BANBA, Hiroshi KATAI, Yuusuke TATEISHI, Yuuji YAMASHITA, Takumi SUZUKI, Kenji OBATA, Yoshimasa KINPARA, Takashi NAGAYA
  • Patent number: 8720042
    Abstract: A stator manufacturing method which manufactures an insulated conductor coil and mounts this coil to the core, the insulated conductor coil being formed by deforming an insulated conductor into a shape having rectilinear in-slot conductor sections and coil end sections having bent sections, the conductor having an enamel layer formed on the outer periphery thereof and also having an extruded resin coating layer formed on the outer periphery of the enamel layer, comprises: a first step of forming the conductor coil by deforming the conductor to form the bent sections while the coating layer of the conductor is in a non-crystalline resin state; a second step of heating the extruded resin coating layer of the conductor coil to change into a crystalline resin state to a temperature higher than or equal to the glass transition temperature; and a third step of mounting the conductor coil to the core.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: May 13, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideaki Kimura, Hiroaki Urano
  • Publication number: 20140111054
    Abstract: The present invention relates to electrical generators and, in particular, to improvements to efficiency in electromechanical energy conversion in electrical generators and electric motors. The regenerative acceleration generator coil according to the present invention takes advantage of the structure of a high impedance multiple-loop salient pole winding or low impedance bi-filar windings to create a positive armature (accelerative) reaction rather than a negative (decelerative) reaction as exhibited by prior art generators which only have low impedance multiple loops of wire making up their rotor armature. The generator of the present invention reverses these negative effects by delaying current flow in the coil until the rotating magnetic field reaches TDC.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 24, 2014
    Inventor: Thane C. Heins
  • Patent number: 8680734
    Abstract: A power system for a vehicle may comprise an electric machine attached to an engine of the vehicle. The electric machine may comprise only one stator core; a stator main winding wound on the one stator core; a stator exciter winding wound on the one stator core. The stator main winding and the stator exciter winding may be magnetically independent from one another even though magnetic-field-isolation material is not interposed between the stator main winding and the stator exciter winding.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: March 25, 2014
    Assignee: Honeywell International Inc.
    Inventors: Cristian Anghel, Parsa Mirmobin, Ming Xu
  • Patent number: 8674576
    Abstract: An electropermanent magnet-based motor includes a stator having at least one electropermanent magnet, at least one coil around the electropermanent magnet configured to pass current pulses that affect the magnetization of the magnet, and a rotor that is movable with respect to the stator in response to changes in the magnetization of the electropermanent magnet. A wobble motor has a stator with a centrally-located core from which arms radiate outward, an electropermanent magnet and coil on each arm, and a rotor exterior to the stator such that the rotor can rotate around the stator arms. A rotary motor has a centrally-located rotor that rotates about its axis and a stator exterior to the rotor such that the rotor may rotate within the stator arms, the stator including an anteriorly-located stator core from which stator arms radiate inward toward the rotor, and an electropermanent magnet and coil on each stator arm.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: March 18, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Ara Knaian, Neil Gershenfeld, Maxim Lobovsky
  • Publication number: 20140062267
    Abstract: Disclosed herein is a design for flux switching machines with one or more armature windings which can deliver controlled torque, in either selected direction on start up, without the use of a mechanical position sensor. Flux switching machines without sensors can operate equally well in either direction. The invention discloses design features for such machines which improves the torque profile of the motor with angle. In three phase machines this delivers higher torque and lower ripple torque. In single phase flux switching machines the invention allows the rotor to be placed in a position where maximum torque can be delivered in either direction by selection of either positive or negative armature current. Rotor slotting is introduced to create a path of low permeability across a rotor tooth with minimal impact on the normal torque producing flux paths. Asymmetry of stator slots is used to further create a stable rotor position when energised by predominantly field means or armature means.
    Type: Application
    Filed: March 26, 2012
    Publication date: March 6, 2014
    Applicant: TECHNELEC LTD
    Inventors: Charles Pollock, Helen Pollock
  • Publication number: 20140053170
    Abstract: There is provided a spindle motor for a 2.5? type disk driving device, including: a base having a stator core seating part protruding upwardly in an axial direction; a stator core including a ring-shaped coreback part, a tooth part, and a front end part; and a coil wound around the stator core, wherein when a length of the stator core from an inner end portion of the coreback part to the endmost part of the front end part is defined as L and a height of the wound coil from the lowermost edge of the coil in an axial direction to the uppermost edge thereof is defined as H, a ratio (H/L) of the height of the wound coil to the length of the stator core in which back electromotive force (B-EMF) is 0.35 V/Krpm or more when the supply of power is stopped satisfies 0.524?H/L?0.703.
    Type: Application
    Filed: October 24, 2012
    Publication date: February 20, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Hyung Ki MOON, Hong Joo Lee
  • Publication number: 20140042863
    Abstract: In a brushed direct current motor including a stator that is provided with 2×P magnetic poles (P is odd and greater than or equal to three), an armature core rotatably held with respect to the stator and includes P×N±2 teeth (N is an even and greater than or equal to four) in a circumferential direction, a commutator held so as to integrally rotate with the armature core and includes commutator segments, the number of the commutator segments being the same as that of the teeth, a winding wound around the teeth in a double-wave form, and two anode brushes and two cathode brushes arranged in sliding contact with the commutator, a width angle WB of each of the brushes in sliding contact with the commutator is set so as to satisfy a relation of “WB>WP+WI”.
    Type: Application
    Filed: July 12, 2013
    Publication date: February 13, 2014
    Inventors: Masayoshi OJIMA, Kohji MAKI
  • Patent number: 8637771
    Abstract: The disclosed invention describes a motor/generator coil produced using rectangular electric current conductors of any thickness and width. A unique joint between the up and down segments of the coil turn enables an improved conductor packing ratio and geometrical orientation that minimizes the effect of eddy currents. The resulting coil produces higher power than typical wire wound motors but is lighter weight and physically smaller in size. In addition, the coil can be free-standing, and is capable of slotless and/or ironless core device configuration.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: January 28, 2014
    Inventors: Greald W Yankie, Gregory S Graham
  • Publication number: 20130342048
    Abstract: A method of producing a cylindrical laminated winding with radial slots for electrical machines is disclosed. The method includes providing a strip of conducting material, cutting cuts in a strip where the cuts form the radial slots of the laminated winding, and winding the strip to form the cylindrical laminated winding whereby a radial distance is enclosed between adjacent winding turns. A laminated winding for an electrical machine is also disclosed, and includes a strip of conducting material. The strip is wound in a cylindrical manner and is provided with cuts which are located between winding turns of the laminated winding such that they together form continuous radial slots, wherein a radial distance is enclosed between adjacent winding turns.
    Type: Application
    Filed: June 20, 2013
    Publication date: December 26, 2013
    Inventor: Conny HOGMARK
  • Publication number: 20130313939
    Abstract: A motor includes a plate-like insulating member that is interposed between coils located next to each other in the circumferential direction. Elastically deformable small protrusions, which protrude radially inward, are formed at an inner side portion of the insulating member, the inner side portion contacting inner covering portions of the insulators. The small protrusions are formed such that the insulating member is allowed to be inserted between the coils from the axial direction when the small protrusions are elastically deformed and the small protrusions are engaged with axial end faces of the inner covering portions.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 28, 2013
    Applicant: JTEKT CORPORATION
    Inventor: Akira HIRAMITSU
  • Publication number: 20130313940
    Abstract: An electric motor is provided including a stator and an armature received within the stator for rotational movement within the stator. The armature includes an armature shaft on which a commutator is mounted, and a lamination stack also mounted on the armature shaft and having radially extending teeth that form slots therebetween. The armature further includes end insulator arranged at an end of the lamination stack, the end insulator having a base portion fitted around the armature shaft and insulating teeth corresponding to the radially extending teeth of the lamination stack. A set of coils are wound in the lamination stack slots and the end insulator slots. In an embodiment, at least a portion of the insulating teeth has a greater thickness than at least a portion of the base portion. In another embodiment, at least one of said insulating teeth has a greater thickness than at least another of said insulating teeth. In yet another embodiment, the end insulator has a uniform thickness of at least 5 mm.
    Type: Application
    Filed: May 22, 2013
    Publication date: November 28, 2013
    Applicant: Black & Decker Inc.
    Inventors: Daniel F. Nace, Michael Marjomaa
  • Patent number: 8587176
    Abstract: A salient pole concentrated winding stator for an electric motor includes an annular stator core and a plurality of coils. The annular stator core includes a plurality of teeth. The plurality of coils are wound around the teeth such as to have different phases on the teeth adjacent in a circumferential direction. Each of the coils includes a first winding end and a second winding end, and at least one of the ends extends across the coil of a different phase. An end portion of the first winding end of one of the coils of the same phase that are adjacent in the circumferential direction is directly joined to an end portion of the second winding end of the other coil to form a joint portion without using an electric-power collection/distribution member. The joint portion is covered with an insulating material.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ken Kitaori, Nobuhiro Iitaka
  • Patent number: 8587177
    Abstract: A stator includes a stator core and a distributed winding type multi-phase coil. This coil includes unit coils made by winding a flat conductor wire in plural turns. The unit coils are mounted in slots of the stator core and connected with each other. Each unit coil includes an outer-layer coil and an inner-layer coil each being concentrically wound. Those two layer coils are made of a single continuous flat conductor wire. A winding start portion of the outer-layer coil and a winding end portion of the inner-layer coil form first and second connection end portions of the unit coil respectively. The first and second connection end portions are located separately on both edges of the unit coil above an upper end face of the stator core. The first connection end portion is placed close to an inner circumference of the stator core and the second connection end portion is placed close to an outer circumference of the stator core.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: November 19, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Kitamura, Atsushi Watanabe, Fujio Ando, Masayoshi Haga
  • Publication number: 20130293054
    Abstract: Disclosed is an electric motor including a yoke formed in a bottomed cylindrical shape; permanent magnets arranged on an inner peripheral surface of the yoke; an armature including a rotary shaft journalled on the yoke, an armature core formed with a plurality of teeth and fixed onto the rotary shaft, an armature coil wound around the teeth of the armature core, a commutator having a plurality of segments and being fixed onto the rotary shaft, and a connecting wire connecting two segments arranged to face each other back to back around the rotary shaft, the armature being surrounded by the permanent magnets and accommodated within the yoke; and a first brush, a second brush, and a third brush coming into sliding contact with the segments of the commutator of the armature.
    Type: Application
    Filed: April 9, 2013
    Publication date: November 7, 2013
    Applicant: MITSUBA CORPORATION
    Inventors: Tatsuyuki SAITO, Ryuichi TAKAKUSAGI, Toshiyuki KIMURA, Yoshichika KAWASHIMA, Kenji SAKATA
  • Patent number: 8575811
    Abstract: A motor has a stator and a rotor. The stator has 2P poles wherein P is an integer greater than one. The rotor has a shaft, a rotor core and a commutator fixed to the shaft. The commutator has m segments where m is an even integer greater than P. Every two adjacent segments are electrically connected by a winding unit so that the rotor winding comprises m winding units with at least one of the winding units comprising P coils connected in series; and each coil of each winding unit is directly connected to a corresponding two segments.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: November 5, 2013
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Bao Ting Liu, Ji Cheng Pan, Mao Xiong Jiang, Yong Qiang Song, Ji Dong Chai
  • Patent number: 8552610
    Abstract: An alternator including a rotatably-assembled permanent magnet, the magnetization direction of the magnet being orthogonal to the rotation axis, and a winding with no iron core surrounding the magnet and having each turn in a plane substantially parallel to a plane containing the rotation axis, the winding extending across a dihedral angle from the rotation axis smaller than 75 degrees and, radially, over a distance ranging between one quarter and half of the magnet diameter.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: October 8, 2013
    Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventor: Marc Beranger
  • Patent number: 8552609
    Abstract: A synchronous motor which has reduced torque ripple while having a high torque includes a rotor and a stator, and U-phase coils, V-phase coils, and W phase coils are wound around sections of the yoke each located between two adjacent stator teeth. The number of turns in each coil and the direction in which each coil is wound are set to compensate for a difference between a timing at which a magnetic field produced at each stator tooth is at a maximum value and a timing at which a point between magnetic poles passes by the stator tooth as the rotor rotates, the difference in timing being caused by a difference between the interval between the magnetic poles and the interval between the stator teeth.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: October 8, 2013
    Assignee: Panasonic Corporation
    Inventor: Noriyoshi Nishiyama
  • Publication number: 20130257215
    Abstract: Method for stamping multiple coil sides (96) for a stator winding (18), characterized in that the multiple coil sides (96) are arranged in a grooved row (90), the shaping process taking place at a force (F), the direction of which runs at an angle (?) greater than zero relative to the grooved row (90).
    Type: Application
    Filed: November 30, 2011
    Publication date: October 3, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventors: Klaus Pflueger, Martin Henne, Klaus Herbold, Christoph Schwarzkopf, Helmut Kreuzer, Steffen Didra
  • Patent number: 8546991
    Abstract: A synchronous generator 1 including a rotor having a field winding placed in the slots thereof and a stator having an armature winding placed in the slots thereof, wherein the value of the number of slots per two poles in stator minus the number of slots per two poles in rotor is equal to or greater than +9, or equal to or smaller than ?9.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: October 1, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Sawahata, Kazuo Nishihama, Hiroyuki Mikami, Tetsuo Fujigaki, Motonobu Iizuka, Shuji Mizutani
  • Patent number: 8536755
    Abstract: According to one embodiment, there is provided a 3-phase 2-pole 2-layer armature winding, housed in 72 slots provided in a laminated iron core, a winding of each phase including six parallel circuits separated into two phase belts. Upper coil pieces of first and fourth parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, and lower coil pieces of the first and fourth parallel circuits are placed at 1st, 6th, 9th, and 10th positions, upper and lower coil pieces of second and fifth parallel circuits are placed at 2nd, 5th, 8th, and 11th positions, and upper coil pieces of third and six parallel circuits are placed at 1st, 6th, 9th, and 10th positions, and lower coil pieces of the third and six parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, from the center of a pole.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: September 17, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Tokumasu, Masafumi Fujita, Takashi Ueda, Mikio Kakiuchi
  • Patent number: 8536754
    Abstract: An electrical machine comprising a stator (1) and a rotor (2) movable relative to the stator is provided. The stator (1) comprises a doubled number of notches (3) with respect to a pole pair number p of the rotor. This is combined with differing numbers (n1, n2) of turns per phase winding or with differing tooth widths (Z1, Z2) of teeth (6, 7) of the stator which are formed between neighboring notches (3).
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: September 17, 2013
    Assignee: FEAAM GmbH
    Inventor: Gurakuq Dajaku
  • Patent number: 8531074
    Abstract: An electric machine, in particular an electrically excited claw pole generator for a motor vehicle, is provided, having a stator winding, the phase terminals of which may be connected in the manner of a pentagram to a rectifier system. The stator winding has a five-phase design, phase terminals situated in adjacent slots being interconnected at least once. All of the phase terminals may be interconnected are situated in adjacent slots.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: September 10, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Gert Wolf, Norbert Pfitzke
  • Patent number: 8505674
    Abstract: A steering drive for a motor vehicle comprising a steering wheel, a steering column, on which the steering wheel is disposed, a connecting rod, which interacts with the steering column to deflect the wheels of the motor vehicle, an electric motor, which is provided for boosting the steering thrust, as well as a belt drive, the electric motor interacting with the connecting rod via the belt drive. Said electric motor comprises a stator having twelve stator teeth as well as a rotor having ten rotor poles, the rotor poles being spaced apart from each other by an air gap and embodied as sinus poles.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 13, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Achim Neubauer, Michael Pesch
  • Publication number: 20130200742
    Abstract: A stator includes: plural core configuration sections each including plural yoke configuration sections that configure a ring shaped yoke and are segmented in a yoke circumferential direction and plural teeth sections that project from the respective yoke configuration sections along a yoke radial direction, with the plural yoke configuration sections and the plural teeth sections integrated together; plural coil wires that are wound onto the respective teeth sections to configure plural winding portions; and plural insulators that each include plural insulator portions that are integrated to each of the respective core configuration sections and insulate between the teeth sections and the winding portions, and a connection portion that connects together the plural insulator portions.
    Type: Application
    Filed: January 29, 2013
    Publication date: August 8, 2013
    Applicant: ASMO CO., LTD.
    Inventor: ASMO CO., LTD.
  • Publication number: 20130181569
    Abstract: A bus bar which electrically connects end portions of a plurality of conductive lines and a method for manufacturing the bus bar are such that an intermediate region of a single wire rod is folded to define a plurality of terminal forming portions extending to a lateral direction of the wire rod. The whole wire rod including the terminal forming portion is rolled. The rolled wire rod is bent into a certain shape.
    Type: Application
    Filed: October 28, 2011
    Publication date: July 18, 2013
    Applicant: Nidec Corporation
    Inventors: Airi Nakagawa, Tomoyoshi Yokogawa, Tsuyoshi Hirokawa, Takahiro Hattori
  • Publication number: 20130181555
    Abstract: A stator coil includes first to fourth in-slot portions and first and second turn portions. Both the first and third in-slot portions are received in one slot of a stator core, while both the second and fourth in-slot portions are received in another slot. The first and second turn portions both protrude from an axial end face of the stator core and respectively connect the pair of the first and second in-slot portions and the pair of the third and fourth in-slot portions. The second turn portion is located inside the first turn portion. When viewed along an axial direction of the stator core, the first and second turn portions extend so as to cross each other with a reference line C interposed therebetween; the reference line C is defined to extend along a circumferential direction of the stator core through an intersection between the first and second turn portions.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 18, 2013
    Applicant: DENSO CORPORATION
    Inventor: Denso Corporation
  • Publication number: 20130181547
    Abstract: An electric motor includes a rotor including an iron core and a plurality of windings, and a stator including a plurality of permanent magnets forming a plurality of poles. The iron core has a plurality of primary teeth around each of which a winding is wound and a plurality of secondary teeth around each of which no winding is wound. The primary teeth and the secondary teeth are formed alternately with each other. The electric motor is configured such that a ratio between the number of poles formed by the permanent magnets of the stator and the number of phases formed by the windings of the rotor is 4m:3n (m and n are any natural numbers, excluding the case where m:n=2:3 is satisfied).
    Type: Application
    Filed: January 10, 2013
    Publication date: July 18, 2013
    Applicant: FANUC CORPORATION
    Inventor: Fanuc Corporation
  • Publication number: 20130162095
    Abstract: Segmented stator assemblies having a plurality of stator segments and a plurality of end caps are disclosed. According to one example embodiment, a segmented stator assembly includes a plurality of stator segments and a plurality of end caps. Each stator segment has a yoke portion and a tooth portion extending from the yoke portion. Each end cap is positioned over one of the stator segments. Each end cap includes a body portion positioned at least partially over the yoke portion of its associated stator segment. At least one of the body portions includes at least a first post that cooperates with a post of an adjacent end cap to define a first wire management tie-down. The stator assembly further includes a stator wire coupled to the first wire management tie-down. Stator assemblies and end caps having other wire management and routing features are also disclosed.
    Type: Application
    Filed: February 18, 2013
    Publication date: June 27, 2013
    Applicant: NIDEC MOTOR CORPORATION
    Inventor: NIDEC MOTOR CORPORATION
  • Patent number: 8471428
    Abstract: A rotating electrical machine includes a rotor, in which a plurality of magnetic poles are provided in circumferential direction, and a stator, within which the rotor is disposed. In the stator, two stator magnetic poles are formed by winding coils of one phase and by a stator core of the stator within 360° of electrical angle defined by the magnetic poles of the rotor. The coils that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle, the coils that form the respective two stator magnetic poles are provided so as not to mutually overlap and are wound so that adjacent ones of the stator magnetic poles have mutually opposite polarities, and, in the stator, each winding of each coil consists of an external bridge wire, a turn portion, an internal bridge wire, and a turn portion, in that order.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: June 25, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Naganawa, Kenji Miyata, Takashi Ishigami, Yoshihisa Ishikawa
  • Patent number: 8450899
    Abstract: A stator includes a stator core and a multi-phase stator coil comprised of a plurality of electric wires. Each of the electric wires has first, second, . . . , nth in-slot portions and first, second, . . . , (n?1)th turn portions, where n is an integer not less than 4. The first in-slot portions of the electric wires are located most radially outward and the nth in-slot portions are located most radially inward in the slots of the stator core. Each of the electric wires also has a first end portion positioned on the first in-slot portion side and a second end portion positioned on the nth in-slot portion side. Each of phase windings of the stator coil is formed of at least two of the electric wires. The first end portion of one of the two electric wires is connected to the second end portion of the other electric wire.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: May 28, 2013
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Atsuo Ishizuka, Shigenobu Nakamura
  • Publication number: 20130127288
    Abstract: A stator assembly for an electric machine including a stator core supporting a plurality of electrical conductors. A plurality of elongated insulator spacers is interwoven between the conductors proximate connection ends thereof in axially spaced relation to the stator core.
    Type: Application
    Filed: November 18, 2011
    Publication date: May 23, 2013
    Applicant: Remy Technologies, L.L.C.
    Inventors: Colin Hamer, Bradley D. Chamberlin, Cary Ramey
  • Patent number: 8427024
    Abstract: To provide a stator capable of achieving downsizing and high output power and a stator manufacturing method, a stator comprises a split stator core and slots formed between the teeth, and protrusion-formed coils each being made of a flat rectangular conductor and placed in the slots. Each protrusion-formed coil has a shape including, in a coil end portion, a lead-side protrusion or a non-lead-side protrusion formed to protrude upward in an axial direction of the stator core from a first oblique side portion, a second oblique side portion, a third oblique side portion, and a fourth oblique side portion, and a first oblique side portion, a second oblique side portion, a third oblique side portion, and a fourth oblique side portion. The lead-side protrusion or the non-lead-side protrusion is designed with a height to avoid interference between the protrusion-formed coils placed in the stator core.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: April 23, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Watanabe, Fujio Ando, Masayoshi Haga, Manabu Kitamura
  • Publication number: 20130088115
    Abstract: An electric motor (1) with permanent magnets includes a rotor (4), on which permanent magnets are fastened (6), and a stator (2). The stator includes a stator structure and coils (5) installed on the stator structure. The stator structure is realized by an assembly of at least three independent stator elements (21), assembled on a baseplate (3) with no direct mechanical linkage between them. Each stator element (21) is fastened onto the baseplate (3) of the motor by an adjusted fastener (31) and at least one anti-rotation element (32). Preferably, the stator elements (21) are made of a material that is a good heat conductor and electrical insulator, such as a ceramic.
    Type: Application
    Filed: March 17, 2011
    Publication date: April 11, 2013
    Applicant: ASTRIUM SAS
    Inventors: Jean Sperandei, Gilles Pupille
  • Publication number: 20130076188
    Abstract: An electric rotating machine includes a rotor and a stator. The rotor has a plurality of pairs of magnetic poles. The stator includes a stator core and a stator coil that is comprised of a plurality of phase windings wound on the stator core. The stator core has, for each of the phase windings of the stator coil, n circumferentially-consecutive single-phase slots, in which only the phase winding is received, per magnetic pole of the rotor, where n is a natural number not less than 2. Each of the phase windings of the stator coil has first to kth sections that are sequentially arranged from one end to the other end of the phase winding, where k is a natural number not less than 2. The first section is received in different ones of the single-phase slots for the phase winding from the kth section.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 28, 2013
    Applicants: NIPPON SOKEN, INC., DENSO CORPORATION
    Inventors: DENSO CORPORATION, NIPPON SOKEN, INC.
  • Patent number: 8390165
    Abstract: Provided is a synchronous motor including a rotor having magnetic poles distributed circumferentially along a rotation direction of the rotor at equal intervals, and a stator having stator teeth arranged circumferentially along the rotation direction of the rotor, each tooth wound with a stator coil by concentrated winding. Every M consecutive stator teeth belong to one of stator teeth groups arranged at equal intervals. The M consecutive stator teeth in each stator teeth group are arranged at intervals different from the intervals of the magnetic poles of the rotor. The stator coils wound around the M consecutive stator teeth are connected to separate terminals. A motor driver supplies currents of different phases to the stator coils via the respective terminals.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: March 5, 2013
    Assignee: Panasonic Corporation
    Inventors: Noriyoshi Nishiyama, Masaki Tagome, Yasuhiro Kondo, Makoto Kitabatake, Shun Kazama
  • Publication number: 20130049514
    Abstract: The electric rotating machine includes a stator winding constituted of conductor segments each having a pair of in-slot portions and a coil end section projecting from both axial ends of a stator core. The coil end section includes a joint-side end portion having a skew portion intersecting with another one of the conductor segments at an axial end of the stator core. The skew portion is formed with a joint end portion at an extremity thereof, the joint end portion being formed with a conductor exposed portion where an inner conductor is exposed and joined to a conductor exposed portion of another conductor segment. A joint area between the joint end portions and a vicinity thereof are covered by an insulating resin member. The insulating resin member is thicker at a portion covering the conductor exposed portions than at a portion covering other than the conductor exposed portions.
    Type: Application
    Filed: August 17, 2012
    Publication date: February 28, 2013
    Applicant: DENSO CORPORATION
    Inventors: Hiroyuki IKUTA, Masato YAMAJI
  • Patent number: 8384263
    Abstract: A rotating electrical machine includes a stator including at least two element coils of the same phase each having a plurality of turns and connected to each other through a coil-to-coil connection wire, the element coils being arranged in adjacent slots, respectively; and a rotor rotatably provided to the stator through a gap. The element coils of the same phase are fitted in the adjacent slots so that wound around portions of the element coils partially overlap each other. The coil-to-coil connection wire connects at a coil end portion conductor wires extending from linear conductor wire portions of innermost wires of the element coils contained in the slots.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: February 26, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Hiromichi Hiramatsu, Takashi Ishigami, Yasuyuki Saito, Yuichiro Tanaka, Kenichi Nakayama, Yutaka Matsunobu, Noriaki Hino
  • Patent number: 8368276
    Abstract: A polyphase electrical machine, in particular, a polyphase generator, includes a stator which features a core body having a circumferential slot pitch, and a winding configuration having a plurality of windings. It is provided that each winding and each slot of the group of slots that extends over one pole pitch is assigned to one of the phases, and the windings have winding sections that lie in assigned slots and between which, in each case, a winding-head connection is formed, the winding-head connections of different windings being disposed radially in layers relative to each other, and the number of phases being five. A method for producing a polyphase electrical machine is also provided.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: February 5, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Gert Wolf, Norbert Pfitzke, Thomas Berger, Eberhard Rau, Alexander Shendi
  • Publication number: 20130026874
    Abstract: A motor includes a driving shaft, a rotor attached to the driving shaft, and a stator having a substantially cylindrical stator core provided around the rotor, and a plurality of coils wound around the stator core in a distributed winding manner The stator core includes three separated stator core parts aligned along a peripheral direction, and each of the coils is disposed so as not to lie astride any two of the three separated stator core parts. At least one coil end of the plurality of the coils is disposed to pass through an inner side relative to an inner peripheral surface of the stator core.
    Type: Application
    Filed: March 28, 2011
    Publication date: January 31, 2013
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshinari Kondou, Yoshiki Yasuda, Akio Yamagiwa
  • Patent number: 8344575
    Abstract: The disclosed embodiments relate to a stator and manufacturing method of the stator in which the coil conducts of the stator have three phases (a U phase, V phase, and W phase), which are arranged in a distributed winding form in a plurality of slots of a stator core. The coil conductors of the three phases each include a slot conductor portion that is disposed in the slot, and a pair of coil end conductor portions disposed on both axial sides of the stator core to connect the slot conductor portions disposed in the different slots. The stator also includes a first side transition wire portion in each phase that is disposed further toward a radial inner side than an inner peripheral end surface of a tooth provided on each circumferential side of the slot so as to overlap another first side transition wire portions in the axial direction.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: January 1, 2013
    Assignee: Aisin AW Co., Ltd.
    Inventors: Kiyotaka Koga, Masaki Saito
  • Publication number: 20120326666
    Abstract: Method of configuring a rotating electric machine (1) stator (2), comprising the following steps: employing a stator (2) having a carcass (5) on which electrical conductors are coiled so as to form N coils (6j), N being greater than or equal to four and, electrically connecting the coils (6j) to an electrical power supply device (7) in such a way that each coil (6j) is traversed by a specific electric current (ij) delivered by the electrical power supply device (7), the connection of the stator (2) to the electrical power supply device (7) being performed in such a way that as one progresses around the axis (X) of the stator away from a reference coil (61), the phase shift between the current (i1) traversing the said reference coil and the current (ij) traversing each of the other coils (6j) and specific to the latter varies in a strictly monotonic manner as one progresses.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 27, 2012
    Applicant: VALEO SYSTEMES DE CONTROLE MOTEUR
    Inventor: Antoine Bruyere
  • Publication number: 20120319521
    Abstract: A stator manufacturing method which manufactures an insulated conductor coil and mounts this coil to the core, the insulated conductor coil being formed by deforming an insulated conductor into a shape having rectilinear in-slot conductor sections and coil end sections having bent sections, the conductor having an enamel layer formed on the outer periphery thereof and also having an extruded resin coating layer formed on the outer periphery of the enamel layer, comprises: a first step of forming the conductor coil by deforming the conductor to form the bent sections while the coating layer of the conductor is in a non-crystalline resin state, a second step of heating the extruded resin coating layer of the conductor coil to change into a crystalline resin state to a temperature higher than or equal to the glass transition temperature; and a third step of mounting the conductor coil to the core.
    Type: Application
    Filed: June 23, 2010
    Publication date: December 20, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Kimura, Hiroaki Urano
  • Publication number: 20120306309
    Abstract: A stator of rotating electrical machine includes a stator core and stator coils. The stator coils have n number (where n?6) unit coils, a first coil group and a second coil group. The unit coils of the first coil group include a first unit coil located nearest the first power supply terminal. The unit coils of the first coil group include a second unit coil. The unit coils of the first coil group include a third unit coil located third nearest the first power supply terminal and adjacent to the second unit coil of the second coil group. The unit coils of the second coil group include a third unit coil located third nearest the second power supply terminal and adjacent to the second unit coil of the first coil group.
    Type: Application
    Filed: August 10, 2012
    Publication date: December 6, 2012
    Inventors: Masakatsu Matsubara, Takashi Hanai, Wataru Ito
  • Publication number: 20120274171
    Abstract: An object is to provide a rotating electric machine offering a high output and high efficiency by balancing inductance of each phase even if a stator is used in which stator windings of different phases are disposed in a slot of a stator core in a three-phase winding. A stator 5 includes a stator core 6 having a plurality of slots arrayed circumferentially and opening to an inner peripheral surface and a stator winding 7 wound in each of the slots. The stator winding 7 is divided into at least two for each phase (7U-A, 7U-B, 7V-A, 7V-B, 7W-A, 7W-B). After insertion of the stator core 6, the stator winding of each phase is connected in parallel or in series. The stator winding of each phase is disposed in slots such that combined inductance of different phases is equalized.
    Type: Application
    Filed: August 11, 2010
    Publication date: November 1, 2012
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Yasuhiko Kimura, Yoshimi Mori, Masahiko Honma, Yosuke Umesaki
  • Publication number: 20120262023
    Abstract: Rotor and stator segments for a generator and motor apparatus are provided. The apparatus includes: a pair of parallel, spaced apart stator segments, each stator segment comprising a stator winding set; and a rotor segment slidably coupled to the pair of stator segments, the rotor segment comprising a magnet and being dimensioned to fit between the parallel, spaced apart stator segments. The apparatus may include a support structure, the rotor segment being slidably coupled to the support structure and the stator segment being attached to the support structure. The apparatus may be a rim generator, wind turbine generator or other electrical machine. The stator winding set includes a stator winding, and may include other electrical or electronic components, including possibly a power factor capacitor, direct current filtering capacitor, supercapacitor, and one or more diodes. The stator winding set may be encapsulated within the stator segment.
    Type: Application
    Filed: June 27, 2012
    Publication date: October 18, 2012
    Inventors: Mihai C. PLATON, Virgil F. YOUNG
  • Publication number: 20120242183
    Abstract: According to one embodiment, there is provided a 3-phase 4-pole 2-layer armature winding of a rotating electrical machine. A winding of each phase of the armature winding forms a series coil. Each series coil includes upper coil pieces and lower coil pieces which are connected each other at a connection side coil end and a counter-connection side coil end, the upper coil pieces and lower coil pieces being placed in 54 slots provided in an armature core. At least one coil piece of the upper and lower coil pieces, provided in at least one of an innermost position and an outermost position from the center of a phase belt of each phase, is replaced with a coil piece of an adjacent phase.
    Type: Application
    Filed: March 20, 2012
    Publication date: September 27, 2012
    Inventors: Tadashi TOKUMASU, Takashi Ueda, Masayuki Ichimonji, Toru Otaka, Daisuke Hiramatsu, Mikio Kakiuchi
  • Publication number: 20120242177
    Abstract: A high power rotary device includes a stator comprising a plurality of wire coils each surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a position sensor operably connected to the rotor; and a control circuit operably connected to the position sensor and the wire coils to activate the wire coils. In this motor the control circuit transfers electrical charge from a first coil to a second coil.
    Type: Application
    Filed: June 4, 2012
    Publication date: September 27, 2012
    Applicant: MILLENNIAL RESEARCH CORPORATION
    Inventors: Robert A. Palmer, JR., Denis L. Palmer
  • Publication number: 20120228981
    Abstract: The invention relates to an electric machine comprising a stator (8) and a rotor (9). The stator comprises grooves (1, 2) for receiving at least two coils of an electric winding. The first coil comprises a first winding number (n1) in a first groove and a second winding number (n2) in a second groove (2). The second coil comprises a first winding number (n1?) in a first groove and a second winding number (n2?) in a second groove (2).
    Type: Application
    Filed: August 4, 2010
    Publication date: September 13, 2012
    Applicant: FEAAM GmbH
    Inventor: Gurakuq Dajaku
  • Publication number: 20120228982
    Abstract: A stator coil segment for an electro mechanical transducer, in particular a generator for generating electric energy from mechanical energy, includes a first coil which is arranged at a first radial position along a radial direction and adapted to be connected to an input terminal of a first power electronic device. The radial direction is perpendicular to a rotation axis of the electro mechanical transducer. Further, a second coil is arranged at a second radial position along the radial direction and adapted to be connected to an input terminal of a second power electronic device, wherein the second radial position is different from the first radial position.
    Type: Application
    Filed: March 7, 2012
    Publication date: September 13, 2012
    Inventor: Mohammad Kimiabeigi