Armature Or Primary Patents (Class 310/195)
  • Publication number: 20120043846
    Abstract: A three-phase electric motor assembly is configured to include phase windings that are substantially equally distributed between radially inner portions and radially outer portions within axial slots of a stator core. At least two of the phase windings each include radial inner portions within selected slots and radial outer portions within other slots, such that each of the radial inner portions is positioned within a slot radially inward from the radial outer portion of another of the phase windings, and each of the radial outer portions is positioned within a slot radially outward from the radial inner portion of another of the phase windings. The motor assembly provides balanced impedance between the phase windings to minimize losses attributed to inter-phase circulating currents, increasing overall motor efficiency. The arrangement of the phase windings configures the winding for more direct exposure of at least a part of each phase winding to a cooling system for enhanced heat rejection from end coils.
    Type: Application
    Filed: August 23, 2010
    Publication date: February 23, 2012
    Applicant: EMERSON ELECTRIC CO
    Inventors: Daniel R. Wolfington, Joey M. Bomar, Sean P. McCloskey
  • Publication number: 20120025659
    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: Application
    Filed: October 11, 2011
    Publication date: February 2, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tadashi TOKUMASU, Masafumi FUJITA, Takashi UEDA, Mikio KAKIUCHI
  • Publication number: 20120025634
    Abstract: An electrical machine is provided, comprising a stator (8) and a rotor (9). The stator comprises slots (1, 2) for receiving a coil of an electrical winding. The coil has a first number of turns (n1) in a first slot (1) and a second number of turns (n2) in a second slot (2).
    Type: Application
    Filed: November 13, 2009
    Publication date: February 2, 2012
    Applicant: FEAAM GmbH
    Inventor: Gurakuq Dajaku
  • Patent number: 8106560
    Abstract: A brushless motor is provided. A stator core has a plurality of teeth extending radially from an annular portion of the stator core. The number of the teeth is an integral multiple of the number of coil-drive phases. Coil relief holes for allowing coils to enter are formed on the motor base. The number of the coil relief holes is less than the number of the teeth by the number of the coil-drive phases multiplied by N (N is a natural number). The number of turns of the motor-drive coil wound around one of the teeth corresponding to a portion of the motor base where the coil relief hole is not formed is set to less than that corresponding to a portion of the motor base where the coil relief hole is formed.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: January 31, 2012
    Assignee: Alphana Technology Co., Ltd.
    Inventor: Shigeyoshi Mori
  • Patent number: 8106559
    Abstract: A component for an electric machine includes a spool having a main body portion provided with a first end portion that extends substantially uninterrupted to a second end portion through an intermediate portion. A plurality of mounting elements are provided on the first end portion. A star member is operatively connected to the spool. The star member includes a main body, a plurality of flap members that extend from the main body and collectively define a central opening, and a plurality of mounting members that extend into the central opening. The plurality of mounting members engage with corresponding ones of the plurality of mounting elements to detachably mount the star member to the first end portion of the spool.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: January 31, 2012
    Assignee: Remy Technologies, L.L.C.
    Inventors: Kirk Neet, Scott Bitzer
  • Publication number: 20120007460
    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: Application
    Filed: June 11, 2010
    Publication date: January 12, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Manabu Kitamura, Atsushi Watanabe, Fujio Ando, Masayoshi Haga
  • Publication number: 20120001512
    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: Application
    Filed: October 7, 2009
    Publication date: January 5, 2012
    Applicant: FEAAM GmbH
    Inventor: Gurakuq Dajaku
  • Patent number: 8080916
    Abstract: A direct current motor with brushes in which an armature is provided with a rotating shaft that is supported by a yoke housing, an armature core that is fitted and fixed to a rotating shaft from the outer side, and a commutator that is provided on the rotating shaft adjacent to the armature core with nine segments arranged in the circumferential direction. The armature core has nine teeth that extend in the radial direction in a radial pattern and nine slots that are formed between the teeth and extend in the axial direction, the segments having the same polarity are connected with short-circuiting members, and a pair of brushes that make sliding contact with the segments is disposed so as to be mutually point symmetric centered on the rotating shaft. According to the preset invention, it is possible to effectively achieve flattening of the direct current motor.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: December 20, 2011
    Assignee: Mitsuba Corporation
    Inventors: Naoki Shioda, Yoshichika Kawashima
  • Publication number: 20110304237
    Abstract: A stator segment unit adapted to build a ring-shaped stator when assembled is provided. The stator segment unit includes a stator yoke with at least one stator tooth protruding from the yoke, at least one stator winding having a first winding section fixed close to the tooth, and a second winding section extending freely from the stator segment unit.
    Type: Application
    Filed: June 3, 2011
    Publication date: December 15, 2011
    Inventor: Henrik STIESDAL
  • Publication number: 20110304236
    Abstract: Enhancing torque while reducing torque rippling. A synchronous electric motor, comprising a rotor 2 and a stator 3, wherein a plurality of stator teeth 7 form stator teeth groups 8 with three stator teeth 7 lined up circumferentially forming one group; for the three stator teeth, a main coil is independently wound and sub-coil is further wound around at least one of the stator teeth; coils in one phase are constituted by, in series, the three main coils included in one of the stator teeth groups 8 and sub-coils included in other stator teeth groups, serially connected; and coils in another phase comprise the sub-coils included in one of the stator teeth groups 8 as well as three main coils included in other stator teeth groups.
    Type: Application
    Filed: July 27, 2009
    Publication date: December 15, 2011
    Inventors: Noriyoshi Nishiyama, Masaki Tagome, Yasuhiro Kondo, Makoto Kitabatake, Shun Kazama
  • Publication number: 20110298327
    Abstract: A stator assembly for an electric motor includes an annular core centered about an axis of rotation of an inner rotor which the stator assembly surrounds. The stator assembly has a plurality of electrical windings, each wound in a respective spiral around the outer surface of the core and arranged for current to flow in the windings. In some embodiments, the respective spirals are spaced from and parallel with one another. The stator assembly may have pole pieces that substantially enclose the core and windings. The pole pieces may be configured to taper both radially outward and axially inward to thereby concentrate flux from the core to an inner surface of the pole pieces facing the rotor.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 8, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventor: Alan G. Holmes
  • Patent number: 8072115
    Abstract: Disclosed are foil coil structures and methods for winding the same for stators in electrodynamic machines, as well as electrodynamic machines that implement such coil structures. In one embodiment, a foil coil structure is configured for implementation with a field pole member having pole faces that confront, for example, conical magnets.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: December 6, 2011
    Assignee: Novatorque, Inc.
    Inventors: Donald Burch, John Petro
  • Patent number: 8058764
    Abstract: A winding former with a winding support between a first plate and a second plate for a saddle coil winding made up from a thin layer HTSC, which is destined for a cylindrical armature of an electrical machine, and which has two longitudinal legs parallel to the armature axis between two winding ends, wherein the winding support for each winding end has a bearing surface, which enables the thin layer HTSC to be wound to form a saddle coil without damaging the HTSC thin layer.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: November 15, 2011
    Assignee: Zenergy Power GmbH
    Inventor: Jan Wiezoreck
  • Publication number: 20110273128
    Abstract: Disclosed are a synchronous motor having reduced torque ripple while having a high torque and system for driving the synchronous motor. The synchronous motor comprises a rotor (2) and a stator (3), and U-phase coils (91; 91a, 91b, and the like), V-phase coils (92; 92ab, and the like), and W-phase coils (93; 93ac and the like) are wound around sections of the yoke each located between two adjacent stator teeth (7; 7a, 7ab, and the like). 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 (10, 11, 11, and the like) passes by the stator tooth as the rotor (2) 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: Application
    Filed: August 5, 2010
    Publication date: November 10, 2011
    Inventor: Noriyoshi Nishiyama
  • Publication number: 20110273051
    Abstract: The present invention provides a stator core winding method for a motor and a structure thereof. The method includes preparing a stator core including a plurality of core cavities; winding a pair of second-phase coils into the plurality of core cavities of the stator core; winding a pair of first-phase coils, a pair of the second-phase coils and two pairs of third-phase coils into the plurality of core cavities of the stator core; and winding two pairs of the first-phase coils, a pair of the second-phase coils and a pair of the third-phase coils into the plurality of core cavities of the stator core.
    Type: Application
    Filed: September 13, 2010
    Publication date: November 10, 2011
    Inventor: Chung SHUNG-LIN
  • Patent number: 8044543
    Abstract: A stator, with a stator core, a plurality of windings with a plurality of in-phase windings and anti-phase windings, a plurality of slots, an insulating plate, a plurality of cylinders, and a plurality of teeth. The teeth protrude from the stator core. The winding is received in the slot and wraps around the tooth. The insulating plate is disposed on the surface of the stator core. The cylinders are disposed on the insulating plate. A transition line is disposed between two adjacent teeth and hangs on the cylinder. A plurality of supporting mechanisms is disposed on the cylinders.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: October 25, 2011
    Assignee: Zhongshan Broad-Ocean Motor Co., Ltd.
    Inventor: Xu Zhang
  • Patent number: 8030818
    Abstract: A stator coil includes a plurality of copper strands and a layer of high thermal conductivity polymer disposed adjacent at least one of the copper strands. The high thermal conductivity polymer includes a host polymer and a high thermal conductivity filler. The high thermal conductivity polymer improves heat transfer from the plurality copper strands.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 4, 2011
    Assignee: Siemens Energy, Inc.
    Inventors: Thomas I. Nelson, John W. Wood, Lon W. Montgomery
  • Patent number: 8022588
    Abstract: It is an object to obtain a highly efficient and low-cost single-phase motor by producing the motor in a form that allows a proper material layout, with securing a magnetic path of a coreback of a stator iron core.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: September 20, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hayato Yoshino, Yoshio Takita, Koji Yabe, Tomoaki Oikawa, Takahiro Tsutsumi
  • Patent number: 8018113
    Abstract: A motor winding arrangement that is capable of delivering relatively flat torque over a wide range of speeds, thus achieving increasing power throughout its operating range, is provided. In a multi-phase, e.g., three-phase, motor utilizing the winding arrangement of the invention, each winding layer corresponds to one phase of the motor and occupies every slot of the stator. The poles for each winding layer consist of concentric and non-overlapping coils.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: September 13, 2011
    Assignee: Tesla Motors, Inc.
    Inventor: Yifan Tang
  • Patent number: 8018112
    Abstract: A coil wire for a coil assembly of a rotating electrical machine is provided such that sufficient space in braiding is secured when coil-wire-bundles bundling a plurality of the coil wires are braided. Each of the coil wires has a predetermined length, a plurality of straight portions and a plurality of turn portions, the straight portions linearly-extend in parallel in a first direction substantially perpendicular to the overall length direction of the coil wires, the turn portions connect two of the straight portions to be adjacent via first-kinked-portions and second-kinked-portions, the first-kinked-portions are kinked in a second direction substantially perpendicular to both the first direction and the length direction of the coil wires, the second-kinked-portions are kinked in a third direction substantially opposite to the second direction so that the turn portions are formed in a wave-shape in the length direction of the coil wires.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 13, 2011
    Assignee: Denso Corporation
    Inventors: Masaomi Dobashi, Akito Akimoto
  • Publication number: 20110210638
    Abstract: A stator includes a stator coil comprised of electric wires each of which has in-slot portions received in slots of a stator core and turn portions located outside the slots to connect the in-slot portions. Each of the turn portions is stepped to have parallel parts that extend substantially parallel to a corresponding axial end face of the stator core. For each pair of the turn portions of the electric wires, which respectively protrude out of an adjacent pair of the slots of the stator core, the parallel parts of one of the turn portions overlap those of the other in the axial direction of the stator core. A clearance provided between one of the overlapping pairs of the parallel parts, which is positioned furthest from the corresponding axial end face of the stator core, is largest among all clearances provided between the overlapping pairs of the parallel parts.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 1, 2011
    Applicant: DENSO CORPORATION
    Inventors: Shinichi Ogawa, Atsuo Ishizuka
  • Patent number: 8008828
    Abstract: The electric rotating machine includes a rotor around which a field coil is wound, and a stator including a stator core around which an armature winding is wound. The armature winding includes a first three-phase winding whose phase coils are delta-connected to form a delta winding, and a second three-phase winding whose phase coils are connected to corresponding nodes of the delta winding to form a star winding. The delta winding and the star winding are wound around the stator core such that the phase coils of the delta winding and the phase coils of the star winding share the same slots of the stator core.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: August 30, 2011
    Assignee: Denso Corporation
    Inventor: Akihito Koike
  • Patent number: 7990013
    Abstract: A stator coil of a slotless motor is disclosed in which the stator coil is formed in such a manner that respective both distal ends of two unit coil bodies, each unit coil body arranged to face each other, are respectively coupled to form a plurality of circular coil bodies, each circular coil body having a different inner diameter, and a circular coil body having a smaller inner diameter is sequentially inserted into an inner side of a circular coil body having a larger inner diameter, whereby a horizontal width of the plurality of unit coil bodies of U, V and W phases is equal there among to cause the strength of the magnetic field of U, V and W phases to be equal, and to allow the stator to be accurately manufactured, thereby catering to a designer's intention and markedly simplifying the assembly processes.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: August 2, 2011
    Assignee: Korea Electronics Technology Institute
    Inventors: Jung Moo Seo, Joo Han Kim, Se Hyun Rhyu, In Soung Jung, Seung Bin Lim, Jun Hyuk Choi, Young Kyoun Kim, Bon Gwan Gu
  • Patent number: 7982354
    Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having laminations forming salient poles, a commutator fitted to the shaft adjacent one end of the rotor core, windings wound about poles of the rotor core and terminated on the commutator, the windings each being wound around a single pole of the rotor; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: July 19, 2011
    Assignee: Johnson Electric S.A.
    Inventors: RuiFeng Qin, Ling Yang, BaoTing Liu, TingTuan Xu
  • Patent number: 7977840
    Abstract: A stator winding for a slotless motor is formed by winding a magnet wire 22 into a single layer coil 24. The coil 24 is deformed e.g., by pressing, to form a double layer web 26 which is rolled up end to end to form a cylindrical stator winding 20. The coil 24 is divided into a number of phase windings 27 extending between connection tappings 25. The magnet wire 22 is a multi-core magnet wire formed from a plurality of core wires 23. Each core wire 23 is an insulated single core wire. Optionally the core wires are twisted together. The core wires 23 are electrically connected together at the connection tappings 25 to form a plurality of parallel electrical paths or sub-windings.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: July 12, 2011
    Assignee: Johnson Electric S.A.
    Inventors: Jun Jie Chu, Xiao Peng Ma
  • Publication number: 20110148241
    Abstract: An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 23, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Kenji MIYATA, Yoshihisa ISHIKAWA
  • Publication number: 20110140563
    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: Application
    Filed: December 7, 2010
    Publication date: June 16, 2011
    Applicant: Commissariat a L'Energie Atomique et Aux Energies Altematives
    Inventor: Marc BERANGER
  • Publication number: 20110133485
    Abstract: A machine has a rotor to be associated with a shaft. The rotor is provided with permanent magnets. A stator has pole pieces, including a main winding and flux diverters separating the main winding from a control coil. Control is provided for controlling the power passing through the control coil. The machine is a transverse flux machine. The machine may be utilized as a generator, an electric motor, or for other application.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 9, 2011
    Inventors: Jacek F. Gieras, Gregory I. Rozman
  • Publication number: 20110133679
    Abstract: A two-phase BLDC motor comprises a stator and a rotor. The stator has a stator core and a two-phase winding wound on the stator core. The stator core comprises a plurality of teeth with slots formed between adjacent teeth. The rotor rotor has a plurality of magnetic poles formed by at least one permanent magnet. The windings are received in corresponding slots in such a way that each winding spans multiple teeth and the direction of current flowing through the windings in any one slot at any one time is the same.
    Type: Application
    Filed: December 3, 2010
    Publication date: June 9, 2011
    Inventors: Yue LI, Li Sheng Liu
  • Publication number: 20110127875
    Abstract: Winding diagrams, in which there is no intersection of endwindings in space and which are suitable for interchangeable windings of electrical machines, are considered in the proposed invention. Winding diagrams of a three-phase, two-layer concentric winding with a 120° phase zone and a three-phase, three-layer concentric winding with a 180° phase zone are considered. The scheme of a three-phase two-layer concentric winding with 120° phase with a linear distribution of turns in phase coils is offered for improvement of MMF distribution. The scheme of a three-phase, three-layer concentric winding with 180° phase zone with trapezoidal distribution of turns in phase coils is also proposed for improvement of MMF distribution.
    Type: Application
    Filed: February 6, 2011
    Publication date: June 2, 2011
    Inventor: Sergey Pulnikov
  • Patent number: 7948142
    Abstract: A rotor provided in rotary electric machines comprises a stator core having a radial direction and slots provided with bottomed openings directed in the radial direction. The rotor also comprises a stator coil comprising slot accommodation portions being accommodated in the slots of the stator core and coil end portions each connecting mutually adjacent slot accommodation portions among the slot accommodation portions and respectively protruding from both end faces of the stator core. The stator coil is pre-formed into a cylindrical shape before the slot accommodation portions are accommodated into the slots of the stator core. The slot accommodation portions are formed to respectively have convex parts each protruding toward an opposite way to the slot openings, before the slot accommodation portions are accommodated into the slots. The convex parts are pressed by the stator core toward the openings during accommodation of the slot accommodation portions into the slots.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: May 24, 2011
    Assignee: Denso Corporation
    Inventors: Masaomi Dobashi, Akito Akimoto, Yoshinobu Yanagisawa
  • Publication number: 20110074239
    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: Application
    Filed: May 28, 2009
    Publication date: March 31, 2011
    Inventors: Noriyoshi Nishiyama, Masaki Tagome, Yasuhiro Kondo, Makoto Kitabatake, Shun Kazama
  • Patent number: 7902714
    Abstract: A motor stator includes a silicon steel seat wound with six sets of starting coils and six sets of operating coils formed with resistant enameled coils. The six sets of starting coils are respectively made of the resistant enameled coils in directions respectively of entering into a first slot and out a fifth slot of the silicon steel seat, entering into a second slot and out a sixth slot, entering into a third slot and out a seventh slot, entering into an eleventh slot and out a seventh slot, entering into a twelfth slot and out an eighth slot, and entering into a first slot and out a ninth slot. And the six sets of operating coils are respectively composed of the resistant enameled coils in directions respectively different from the winding directions of the six sets of starting coils, able to quickly and evenly complete winding work.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: March 8, 2011
    Inventor: Sheng-Chung Lee
  • Publication number: 20110050023
    Abstract: A motor magnetic pole structure including a first seat having multiple first insulating arms and a second seat having multiple second insulating arms. Multiple first coils are wound on the first insulating arms and multiple second coils are wound on the second insulating arms. The first and second silicon steel seats overlap each other with the first and second insulating arms alternately positioned. In this case, the first and second coils wound on the first and second insulating arms are alternately positioned to intersect each other. The first and second silicon steel seats can assembled as necessary to enhance compatibility of the silicon steel seats and lower manufacturing cost. Moreover, the winding operation of the coils can be speeded.
    Type: Application
    Filed: September 1, 2009
    Publication date: March 3, 2011
    Applicant: ASIA VITAL COMPONENTS CO., LTD.
    Inventors: Jen-Chieh Wu, Chiang-Han Chen
  • Publication number: 20110050024
    Abstract: A three-phase, high voltage motor for use in a scroll compressor includes a stator core having an annular rim and a plurality of teeth extending radially inward from the rim. Aluminum windings are wrapped around teeth of the plurality of teeth of the stator core. The windings are spaced 120 electrical degrees from each other. The motor further includes a rotor body that is rotatably mounted inside the stator core and includes an external surface facing the stator core.
    Type: Application
    Filed: September 1, 2009
    Publication date: March 3, 2011
    Applicant: EMERSON ELECTRIC CO.
    Inventor: J. Scott Rose
  • Publication number: 20110043059
    Abstract: An alternating-current generator, in particular a three-phase generator, for a motor vehicle, having a rotor including north and south poles, particularly having claw-pole fingers extending in the axial direction and alternating as north and south poles at the rotor's periphery, a stator having a magnetic core, especially laminated core, having slots and a stator winding disposed in the magnetic core's slots, the stator winding having winding overhangs that are coolable by an approximately radial air flow produced by at least one fan mounted at the rotor, the stator being situated opposite the rotor, and the stator and the rotor having defined positions relative to each other, the multiphase stator winding being made up of winding elements, at least one winding element having more than two sections inserted in slots, and at least one winding element having more than one reversal section which brings about a change in the radial position.
    Type: Application
    Filed: January 2, 2008
    Publication date: February 24, 2011
    Inventors: Gert wolf, Thomas Berger, Eberhard RAU, Alexander Shendi, Helmut Kreuzer, Christoph Schwarzkopf
  • Patent number: 7888839
    Abstract: A motor-generator includes a rotor that rotates about an axis of rotation, and a stator that is stationary and magnetically interacts with the rotor. The rotor is constructed of two spaced apart rotor portions having magnetic poles that drive magnetic flux across an armature airgap formed therebetween. An armature, located in the armature airgap, has a substantially nonmagnetic and low electrical conductivity form onto which wire windings are wound. The form has a free end that extends inside the rotor, and a support end that attaches to the stationary portion of the motor-generator. The form is constructed with a thin backing portion and thicker raised portions extending from the backing portion in the direction of the magnetic flux. The wire windings have multiple individually insulated conductor wire. The conductors of a single wire are electrically connected together in parallel and electrically insulated between each other along their length inside the armature airgap.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: February 15, 2011
    Assignee: Revolution Electric Motor Company, Inc.
    Inventors: Christopher W. Gabrys, Timothy S. Rodgers
  • Publication number: 20110031840
    Abstract: In a drive system, including a stator and a rotor associated with an energy transmission system supplying energy to a load on the rotor, the drive function and the energy transmission function are largely independent of each other. A subharmonic air gap field portion is used for transmitting electric energy to a rotor winding.
    Type: Application
    Filed: March 26, 2009
    Publication date: February 10, 2011
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Gerhard Huth, Markus Reinhard
  • Publication number: 20110025162
    Abstract: A rotating electrical machine, includes; a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein; two stator magnetic poles are formed by winding coils in phase and by the stator core within 360° of electrical angle defined by the magnetic poles of the rotor; the coil turns that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle; the coil turns 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: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Takashi NAGANAWA, Kenji MIYATA, Takashi ISHIGAMI, Yoshihisa ISHIKAWA
  • Publication number: 20110025161
    Abstract: An axial flux stator includes a plurality of magnetically permeable members, a plurality of windings, a back iron, and an encasing. The plurality of windings is associated with the plurality of magnetically permeable members to produce a plurality of winding-magnetically permeable member assemblies. The back iron is mechanically butt joint coupled to the plurality of winding-magnetically permeable member assemblies. The encasing maintains the butt joint coupling of the back iron to the plurality of winding-magnetically permeable member assemblies.
    Type: Application
    Filed: July 30, 2009
    Publication date: February 3, 2011
    Applicant: BISON GEAR & ENGINEERING CORP.
    Inventors: Lester B. Ashe, Matthew S. Hanson
  • Publication number: 20110012467
    Abstract: A stator assembly for use with an electric motor includes, but is not limited to, a stator core having an inner surface and a plurality of open slots defined in the inner surface. The stator assembly also includes a winding having multiple conductors. The winding is coupled to the stator core such that a predetermined quantity of conductors is disposed within each open slot. The winding is configured to control a magnitude of a torque ripple produced by operation of the electric motor.
    Type: Application
    Filed: July 15, 2009
    Publication date: January 20, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: ROLF BLISSENBACH, DANG DINH DANG, ERIK HATCH, MICHAEL MILANI
  • Publication number: 20110012450
    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: Application
    Filed: July 16, 2010
    Publication date: January 20, 2011
    Applicant: DENSO CORPORATION
    Inventors: Atsushi UMEDA, Atsuo Ishizuka, Shigenobu Nakamura
  • Publication number: 20110012466
    Abstract: Methods and apparatus are provided for stator assembly for use with an electric motor assembly. The stator assembly includes, but is not limited to a stator core that has an inner surface and a plurality of stator slots defined in the inner surface. A fractional slot winding having a plurality of conductors is coupled to the stator core. Each stator slot contains a group of the conductors arranged in a radially adjacent configuration. The groups of conductors in each of the stator slots together form a plurality of concentric rings of conductors. The conductors in each mixed group are arranged such that conductors carrying differing phases of electric current are arranged in a radially alternating configuration.
    Type: Application
    Filed: July 15, 2009
    Publication date: January 20, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: ROLF BLISSENBACH, DANG DINH DANG, ERIK HATCH, MICHAEL MILANI, DAVID SCHAUER, JOHN WATTLEWORTH
  • Publication number: 20110012469
    Abstract: A brush motor includes a stator with 2P magnetic poles and a rotor which includes a rotor core, a commutator and windings wound on the rotor core. The rotor core includes N teeth with a slot formed between adjacent teeth. The commutator includes M segments represented by Z1 . . . ZX . . . ZY . . . ZM, wherein M, N, P, Y and X are integers and M is odd and greater than N. Each winding includes a start connected to a segment ZX and an end connected to another segment ZY. Each winding includes at least one coil wound about a corresponding tooth or set of teeth. Some of the windings include a plurality of coils wound on different teeth. The total number of turns of the coils for each winding is substantially the same. A winding unit consisting of a plurality of windings is connected between each pair of adjacent segments. ZX and ZY satisfy the following equation: |Y?X|=(M±1)/P.
    Type: Application
    Filed: July 16, 2010
    Publication date: January 20, 2011
    Inventors: Jian ZHAO, Yong LI, Yue LI, Mao Xiong JIANG, Li Sheng LIU
  • Publication number: 20110012470
    Abstract: A motor comprises a stator and a rotor. The stator comprises 2P poles wherein P is an integer greater than one. The rotor comprises a shaft, a rotor core and a commutator fixed to the shaft. The commutator comprises 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: Application
    Filed: July 20, 2010
    Publication date: January 20, 2011
    Inventors: Yue LI, Bao Ting Liu, Ji Cheng Pan, Mao Xiong Jiang, Yong Qiang Song, Ji Dong Chai
  • Publication number: 20110012468
    Abstract: A stator for a radial gap motor is formed by winding a plurality of metal wires to form a hollow cylinder having a plurality of poles and a plurality of turns. Two ends of each metal wire are located on the same end of the cylinder and form a plurality of conductive members for electric connection with a circuit board. The stator is simple in structure and easy to manufacture. The stator can be utilized in various radial gap motors, so that the radial gap motors benefit from the advantages of the stator.
    Type: Application
    Filed: July 17, 2009
    Publication date: January 20, 2011
    Inventors: Alex Horng, Tso-Kuo Yin
  • Publication number: 20110001384
    Abstract: A vibration motor includes: a core pivotally supported on a shaft; a commutator for supplying electric current to a coil; a commutator holder having through holes extending in an axial direction of the shaft; and chip type varistors fitted into the through holes. The commutator is provided with conductors extending in the axial direction of the shaft, and the conductors are inserted into the through holes and press-fixed to end electrodes of the chip type varistors. A first protrusion is provided on a first wall surface forming each through hole, and a second protrusion facing the first protrusion is provided on a second wall surface.
    Type: Application
    Filed: March 10, 2009
    Publication date: January 6, 2011
    Applicant: NIDEC COPAL CORPORATION
    Inventor: Noboru Segawa
  • Publication number: 20100326378
    Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having laminations forming salient poles, a commutator fitted to the shaft adjacent one end of the rotor core, windings wound about poles of the rotor core and terminated on the commutator, the windings each being wound around a single pole of the rotor; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings.
    Type: Application
    Filed: September 3, 2010
    Publication date: December 30, 2010
    Inventors: RuiFeng QIN, Ling Yang, BaoTing Liu, TingTuan Xu
  • Patent number: 7859200
    Abstract: For mutually cross-interlocked multiple asynchronous AC induction electrical machines of the present invention, wherein the applicable operating characteristic curves of the asynchronous AC induction electrical machines include the asynchronous AC induction electrical machine of various operating characteristics, wherein when they are provided for the individual operation in different loading conditions, it is characterized that the cross interlocked electrical machine can be used to increase or decrease the rotational speed of the individual operation.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: December 28, 2010
    Inventor: Tai-Her Yang
  • Publication number: 20100315027
    Abstract: The present invention relates to a method and a control system for driving a three-strand brushless, electronically commutated electric motor (2), wherein a line AC voltage (UN) is rectified and fed via a slim DC link (8) with minimum DC link reactance as a DC link voltage (UZ) to an inverter (10) that can be driven to supply and commutate the electric motor (2). A pulsating DC voltage (UG) initially generated by rectifying the line AC voltage (UN) is dynamically increased with respect to its instantaneous values by a step-up chopper (18) in such a manner that the resulting DC link voltage (UZ) with a reduced ripple always lies above a defined limit voltage (U18/U1) over time. The control system consists of a network rectifier (6), a downstream slim DC link (8) with minimum DC link reactance and a controllable inverter (10) that can be supplied via the DC link and driven to commutate the electric motor (2).
    Type: Application
    Filed: June 21, 2010
    Publication date: December 16, 2010
    Inventors: Ralph Wystup, Helmut Lipp