End Ring Or Plate Patents (Class 310/216.114)
  • Patent number: 10797549
    Abstract: An electric motor, e.g., a bearing-free electric motor, includes a rotor and stator. The rotor has a rotor shaft on which a rotor packet is mounted and connected to the rotor shaft in a torsionally fixed manner. The rotor packet includes rotor segments that are stacked on top of one another in the axial direction, and a centering disk as well as a press-fit connection device, in particular a shrink-fit connection device having a shrink disk and compression rings. The stack, which includes the rotor segments, is situated between the centering disk and the press-fit connection device.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: October 6, 2020
    Assignee: SEW-EURODRIVE GMBH & CO. KG
    Inventor: Alexander Partheym├╝ller
  • Patent number: 10715010
    Abstract: An electric motor including a rotor, a stator, a motor housing having a controller can, and a controller having an electronic component disposed within the controller can. The controller can includes an insert comprising thermally conductive metal for exchanging heat with an external heat sink space.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: July 14, 2020
    Assignee: Nidec Motor Corporation
    Inventors: Steven R. Palmer, Chetan O. Modi, Jeffrey S. Sherman, Douglas D. Glenn, Richard Eason
  • Patent number: 10707718
    Abstract: An electric motor includes a stator assembly and a rotor configured to rotate within the stator assembly about an axis. The stator assembly includes a stator case having a channel and a laminate steel core having a retention feature aligned with the channel of the stator case. The stator case is fixed to the laminate steel core via displacement of material of the stator case at the channel toward the laminate steel core to capture the retention feature. An electro-mechanical drive-unit employing the above-described electric motor and a method of generating a stator assembly for such an electric motor are also contemplated.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: July 7, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Arthur L. McGrew, Jr., Huaxin Li, John S. Agapiou
  • Patent number: 10651714
    Abstract: There is provided a resolver rotor in a resolver provided to a rotating electrical machine. The resolver rotor is formed from an annular body. A phase determination hole for setting a relative position to a shaft of a motor is provided at a near outer peripheral portion of the resolver rotor. A virtual circle is set which comes into contact with a section of the phase determination hole at a proximal end to an inside diameter of the resolver rotor, and has a center point coincident with the center of the resolver rotor. A pair of hole portions are arranged at portions extending from the virtual circle to an outside diameter side of the resolver rotor while taking in the virtual circle.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 12, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Kazuya Kaneta
  • Patent number: 10186929
    Abstract: A brushless motor having a casing for containing a stator body and for a rotor with a driving shaft, an exit cap with an outlet for the driving shaft and a closure cap. The closure cap includes an output for power cables and is disposed opposite the exit cap and supports an electronic board for controlling the brushless motor. The closure cap further includes a recess for containing the electronic control board, which is defined so as to be recessed in an axial direction with respect to the outer surface of the cap.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: January 22, 2019
    Assignee: AMER S.P.A.
    Inventors: Francesco Battistella, Mirko Dalla Costa
  • Patent number: 10074592
    Abstract: An electronic package connectable to an electric machine includes a cooling tower having a metallic wall with a radially outer wall surface. The radially outer wall surface includes discrete, radially outwardly projecting pedestals. The planar pedestal mounting surfaces are parallel with the central axis such that the radial distance between the axis and the radially outer wall surface is greater within the periphery than outside the periphery. Power modules are mounted to the pedestals. Each power module includes a base in thermal contact with a pedestal mounting surface and an opposing interior surface in thermal communication with a MOSFET power electronics device. A cover plate is spaced from the base interior surface. A dielectric housing member surrounds the MOSFET power electronics devices. An electrical connection terminal is disposed outside the periphery of each module. An electric machine including such an electronic package is also disclosed.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: September 11, 2018
    Assignee: BORGWARNER INC.
    Inventor: Michael D. Bradfield
  • Patent number: 9673676
    Abstract: A single rotor type motor includes: a stator including a plurality of stator cores that are split and radially arranged, a bobbin made of an insulating material and wrapped on an outer surface of each of the stator cores, coils wound on an outer surface of the bobbin, an upper fixing plate disposed on the upper surfaces of the stator cores and on which the stator cores are radially arranged, and a lower fixing plate that is disposed on the lower surfaces of the stator cores and is coupled with the upper fixing plate; and a single rotor disposed with a certain gap from any one surface of an inner surface of the stator and an outer surface thereof. The plurality of wiring units for electrically connecting between the coils wound around each of the stator cores are formed integrally on the upper surface of the upper fixing plate.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 6, 2017
    Assignee: AMOTECH CO., LTD.
    Inventors: Byung Soo Kim, Hyung Hwan Ko
  • Patent number: 9450460
    Abstract: The invention relates to an electrical generator comprising a stator which has windings lying in grooves formed by metal sheets and which has a predetermined diameter and a predetermined depth. The metal sheets form a laminated core which is penetrated by threaded bolts, the front and rear end of the laminated core being mounted on a ring of the stator. According to the invention, an additional mounting point for the laminated core is formed on the stator ring, said mounting point being located approximately in the center of the stator ring.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: September 20, 2016
    Assignee: WOBBEN PROPERTIES GMBH
    Inventor: Wilko Gudewer
  • Patent number: 9419486
    Abstract: A housingless transverse flux electrical machine (TFEM) includes a pair of halves adapted to receive therein a plurality of cores and a coil therein. The halves are the exterior boundary for the environment and the TFEM can be in operating configuration without further housing.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: August 16, 2016
    Assignee: EOCYCLE TECHNOLOGIES INC.
    Inventors: Raphael Nadeau, Daniel Massicotte, Eric Adams, Simon Cote, Patrice Fortin, Jean-Francois Bernier-Synnott
  • Patent number: 9397525
    Abstract: An electric motor includes a stator and a rotor installed in the stator. The stator has a laminated stator core and at least two stator windings wound on the stator core. The stator core has at least two stator poles facing the rotor and at least two yokes connecting adjacent stator poles. T stator core is constituted by at least two separate members joined together. The at least two stator poles are only arranged at a single one of the at least two separate members.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: July 19, 2016
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Yue Li, Mao Xiong Jiang, Bao Ting Liu, Chui You Zhou, Jin Yun Gan, Jian Zhao, Yong Li, Hong Wei Zhang
  • Patent number: 9035528
    Abstract: A press plate (5) for tightening the metal sheets (2) of a stator core of an electric machine has an annular element (16) with a plurality of holes (17) provided at a side wall (11) thereof. The holes (17) have an elongated recessed top portion (20) and a cylindrical recessed bottom portion (21) extending from the ceiling (22) of the elongated recessed top portion (20).
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: May 19, 2015
    Assignee: ALSTOM TECHNOLOGY LTD.
    Inventors: Leszek Stachyra, Jacek Mariusz Kanicki, Daniel Hediger, Lothar Eckert
  • Patent number: 9024502
    Abstract: A stator for a rotating electrical device includes a stator retaining ring for the stator in a cylinder form that retains a plurality of cores. The stator retaining ring includes the cylinder portion where the cores are attached, and a plurality of fixing flanges where the stator retaining ring retains the housing with screws. A pair of through-holes representing a group of through-holes arranged near to one another extends through each of the fixing flanges. A separation distance ? in the circumferential direction defined between the pair of the through-holes belonging to the same group of the through-holes is smaller relative to a separation distance ? in the circumferential direction defined between adjacent through-holes belonging to different groups of the through-holes.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 5, 2015
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Toshiya Sugiyama, Takashi Asaga
  • Publication number: 20150084478
    Abstract: A stator core is sandwiched between a first frame and a second frame. A fastening member fastens the first frame and the second frame. The first frame includes a ring flange that is in contact with an attachment surface of the motor attachment portion. The flange includes a fixing portion fixed to the attachment surface and a fastening portion, which receives fastening force by the fastening member. The first frame includes a deform suppression portion for suppressing deformation of the fixing member when the fastening member is fastened.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 26, 2015
    Applicants: DENSO CORPORATION, ASMO CO., LTD.
    Inventors: Yuuji Yamashita, Jirou Hayashi
  • Publication number: 20150084462
    Abstract: Provided is a rotor structure of a rotary electric machine, which is easily adaptable to offer a wide variety of products. The rotor structure of a rotary electric machine includes at least: a rotor shaft (3); a rotor core including a first rotor core section (15) and a second rotor core section (17); a boss section (9); and a pressurizing section. The second rotor core section and the boss section are arranged on an outer circumference of the rotor shaft. The first rotor core section is arranged on an outer circumference of the boss section. The pressurizing section is positioned on an axially outer side of the rotor core. The second rotor core section is pressurized by an abutment surface of the boss section. The first rotor core section arranged on the boss section is pressurized by the pressurizing section.
    Type: Application
    Filed: May 1, 2012
    Publication date: March 26, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryuichi Shimomura, Masaya Inoue
  • Patent number: 8970085
    Abstract: A rotor includes a rotor core comprised of magnetic steel sheets laminated in the axial direction and a pair of end plates that are respectively provided on the axial end faces of the rotor core so as to together sandwich the rotor core in the axial direction. The rotor is rotatably disposed in an electric rotating machine with a circumferential surface of the rotor core facing a stator. At least one of the end plates is configured to have through-holes, each of which is formed so as to axially penetrate the end plate, and a pressing portion that is radially positioned on the stator side of the through-holes. The pressing portion abuts a corresponding one of the axial end faces of the rotor core and exerts an axial load on the corresponding axial end face of the rotor core by an elastic force of the end plate.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: March 3, 2015
    Assignee: Denso Corporation
    Inventors: Yuki Takahashi, Kazuteru Itou, Yuuichirou Itou
  • Publication number: 20140319960
    Abstract: One embodiment provides a stator of an electric rotary machine, including: a stator core having plural slots; a segmented coil of plural phases; and plural base plates laminated at each end of the stator core in an axial direction. While the stator core and plural coil bars of the segmented coil form a stator core assembly, and the plural base plates and plural end coil connections of the segmented coil form plural base plate assemblies. The stator is configured by the stator core assembly and the plural base plate assemblies laminated at each end of the stator core assembly.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 30, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Tomotaka Iki
  • Patent number: 8754565
    Abstract: The stator is formed by a pack (10) of stacked magnetic laminations (12), each of which has a central opening (14) and a plurality of peripheral holes (18), in such a way that the overlapping of identically shaped holes (18) in the laminations (12) defines respective passages through the pack (10). The faces of the laminations (12) are substantially flat and retaining means are associated with the holes (18) in an end lamination (12a) of the pack (10), these means protruding into the openings of the respective holes (18) in the end lamination (12a) without interfering with the other laminations (12) of the pack (10).
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: June 17, 2014
    Assignee: Embraco Europe S.r.l.
    Inventors: Mauro Feroleto, Michele Marino
  • Publication number: 20140145548
    Abstract: A material of the stator core is different from a material of the housings, in a state where one end portion in the axis direction of the stator core is contacted to the first housing, and the other end portion in the axis direction of the stator core is contacted to the second housing; and a neighboring portion of a contact portion, at which the first housing is contacted to the stator core, and another neighboring portion of a contact portion, at which the second housing is contacted to the stator core, are connected by a connecting component in the axis direction, of which material is the same as a material of the stator core, whereby the first housing and the second housing are connected each other; and the first housing and the second housing face each other in a state where a gap intervenes between both housings.
    Type: Application
    Filed: October 6, 2011
    Publication date: May 29, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshihito Asao, Isao Sonoda, Kohei Ushio, Satoru Akutsu
  • Patent number: 8723384
    Abstract: A rotary electric machine is provided with a shaft which is a rotary shaft; a laminated core which has a permanent magnet embedded therein and is press-fitted to the shaft; a first member which is a magnetic member and is press-fitted to the shaft so as to hold an end portion of the laminated core; a second member which is a nonmagnetic member and is provided between the end portion of the laminated core and the first member so as to hold an end portion, with respect to the axial direction of the shaft, of the permanent magnet; and at least one of a first gap between the first member and the second member, and a second gap between the laminated core and the second member.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: May 13, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hirohisa Yokota, Shinsuke Kayano, Yoshiaki Kitta
  • Publication number: 20140125191
    Abstract: A stepper motor has electromagnetically driven stator segments facing corresponding rotor segments. In order to reduce vibration of the stator segments, motor body end caps are provided with a stepped annular rim along an inside diameter of a centering sleeve. The stepped rim bears against each axial end of the stator segments, with a radial dimension and an axial dimension bracketing a stator segment end in place.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 8, 2014
    Applicant: LIN ENGINEERING
    Inventor: Ted T. Lin
  • Patent number: 8698367
    Abstract: An electric machine is provided including a rotor having a plurality of magnets retained on the rotor. The plurality of magnets are retained via a sleeve. The sleeve is retained via a band. The band includes a stacked plurality of washer laminations. Each of the plurality of washer laminations is electrically insulated from an adjacent washer lamination.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: April 15, 2014
    Assignee: Synchrony, Inc.
    Inventors: Christopher Sortore, Victor Iannello, Robert Jett Field
  • Patent number: 8692436
    Abstract: In a brushless motor comprising: a stator S having a stator core 14 arranged surrounding a bearing part, and a core cover 15 arranged on a surface of the stator core; and a rotor R having a rotational shaft 22, a rotor case 21, and a drive magnet 25, the core cover 15 itself has an integrally formed rotor retaining part that enters a groove 22a in the rotational shaft 22.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: April 8, 2014
    Assignee: Tokyo Parts Industrial Co., Ltd.
    Inventor: Masahiro Nishidate
  • Patent number: 8692431
    Abstract: A permanent magnet rotor including a shaft, a rotor core fixed to the shaft, a magnet disposed around the core, and a linker fixed relative to the shaft and located at one end of the core. An elastic clamping structure is arranged between the linker and the magnet such that rotational torque of the magnet is transferred to the shaft via the linker.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: April 8, 2014
    Assignee: Johnson Electric S.A.
    Inventors: James Ching Sik Lau, Jun Yang, Wan Mei He
  • Patent number: 8674580
    Abstract: An electric machine with a stator and a rotor. The rotor core is formed by a stack of laminations with the laminations being generally planar and oriented substantially perpendicular to the rotational axis. One of the laminations includes an axially projecting tab. An electically conductive end ring is located at an axial end of the rotor core and is in communication with a plurality of axially extending conductor bars on the rotor core. The tab is coupled with the end ring and resists a portion of the centrifugal forces acting on the end ring during rotation of the rotor. A plurality of such tabs may be used to provide support to the end ring. A method of manufacture is also disclosed.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: March 18, 2014
    Assignee: Remy Technologies, LLC
    Inventor: Dane E. Carter
  • Patent number: 8648518
    Abstract: A power driven component inside a compressor is disposed with a stator and rotors. The stator has an iron core in a circular ring and stator coils in a tightly wound manner. A vertical interval is formed between adjacent stator coils. A cover body is formed on the stator and a shield member that is formed with an upper portion along each stator coil and bending curve portions at two sides of the upper portion. Each bending curve portion is extended toward the interval from the upper portion. A sealed cover portion is connected between the bending curve portions of the upper portion and correspondingly seals each interval to reduce noise of the compressor and oil circulation rate.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: February 11, 2014
    Assignee: Rechi Precision Co., Ltd.
    Inventors: Wen-Ho Yu, Fu-Rong Chen, Hung-Ming Liao, Chih-Chung Chen
  • Publication number: 20130270962
    Abstract: An end cap for use with a stator assembly is provided. The end cap includes a tooth portion, a yoke portion, and a lip. The tooth portion includes a first end and an opposite second end and the yoke portion is formed at the first end of the tooth portion. The yoke portion includes at least one arm that extends from the tooth portion. The lip is defined along at least one of the tooth portion and the at least one arm portion.
    Type: Application
    Filed: August 7, 2012
    Publication date: October 17, 2013
    Inventors: Jason Jon Kreidler, William J. Conway, Wesley K. Anderson
  • Publication number: 20130221794
    Abstract: An end band and method of forming an end band for a rotor. The end band includes a hollow cylindrical band, wherein at least a portion of the band has a grain flow in a direction parallel to the hoop stress of the band. The end band also includes at least a portion having a grain flow in a direction perpendicular to the hoop stress of the band.
    Type: Application
    Filed: February 28, 2012
    Publication date: August 29, 2013
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Kavithas Ponnampalam, Jong-Yeong Yung, William Louis Wentland, Craig R. Legros, Kevin L. Dickerson, David S. Behling
  • Publication number: 20130193811
    Abstract: An induction rotor includes a rotor core having an axial end surface, an end ring proximate the axial end surface that provides electrical communication between respective ends of conductor bars extending through the rotor core, and an end ring support structure that includes a ring member at least partially embedded in the end ring. An end ring support structure may have at least one axially extending member coupled with the ring member, such axially extending member projecting axially inwardly of the axial end surface and engaging the rotor core. An end ring support structure may include a ring member having an axially extending portion embedded in the end ring between radially inner and outer surfaces of the end ring whereby the end ring includes an outer portion, radially outwardly of the axially extending portion, and an inner portion disposed radially inwardly of the axially extending portion of the ring member.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 1, 2013
    Inventors: Bradley D. Chamberlin, Andrew Worley
  • Publication number: 20130187486
    Abstract: A rotor having an improved structure capable of achieving an enhancement in durability and a motor having the rotor are disclosed. The rotor is configured to co-operate with a stator in an electromagnetic manner such that the rotor rotates. The rotor includes a sleeve having a shaft hole, through which the motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and at least one of permanent magnets disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates are disposed at opposite sides of the permanent magnets in an axial direction. The first and second cover plates have plate holes respectively corresponding to the through holes of the rotor cores. The rotor cores and the first and second cover plates are coupled by fastening members.
    Type: Application
    Filed: January 16, 2013
    Publication date: July 25, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: SAMSUNG ELECTRONICS CO., LTD.
  • Patent number: 8492951
    Abstract: A stator assembly includes a segmented stator having stator portions. Each stator portion includes a support structure and dovetails, each coupled to the support structure by adjustable elements. The stator portion also includes stator laminations, where each of the laminations has openings to engage with the dovetails. Connectors are provided to connect the stator portions of the segmented stator together.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: July 23, 2013
    Assignee: General Electric Company
    Inventors: Robert Michael Zirin, Murtuza Lokhandwalla, Kiruba Sivasubramaniam Haran, Richard Nils Dawson, Mark John DeBlock
  • Publication number: 20130154437
    Abstract: A support ring for a rotor having a core and a plurality of windings. The support ring includes an annular base, a plurality of fingers, and a plurality of loaded edges. The plurality of fingers extend radially outward from the annular base, and each generally corresponds to one of the windings. The plurality of loaded edges extend axially from the fingers and are disposed radially outward of the windings.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 20, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Edward L. Kaiser, Micah Joel Fuchs
  • Publication number: 20130119820
    Abstract: An electric machine with a stator and a rotor. The rotor core is formed by a stack of laminations with the laminations being generally planar and oriented substantially perpendicular to the rotational axis. One of the laminations includes an axially projecting tab. An electically conductive end ring is located at an axial end of the rotor core and is in communication with a plurality of axially extending conductor bars on the rotor core. The tab is coupled with the end ring and resists a portion of the centrifugal forces acting on the end ring during rotation of the rotor. A plurality of such tabs may be used to provide support to the end ring. A method of manufacture is also disclosed.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 16, 2013
    Inventor: Dane E. Carter
  • Patent number: 8410643
    Abstract: An electric motor assembly including a stator assembly and a rotor assembly extending through the stator assembly. A first end cap is located adjacent to a first end of the stator assembly and includes a bearing insert supporting a first end bearing for receiving an end of a rotor shaft. A second end cap is located adjacent to a second end of the stator assembly. An endbell is formed separately from the second end cap and is positioned within the second end cap. The endbell supports a bearing for a second end of the rotor shaft. An overmold material extends through the stator assembly. The overmold material may form the first end cap, supporting the bearing insert therein, and extends within and substantially fills an annular space within the second end cap.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: April 2, 2013
    Assignee: Globe Motors, Inc.
    Inventors: Daniel L. Kottmyer, Robert J. Marks
  • Publication number: 20130076197
    Abstract: A rotor for an electric rotating machine includes a core body member formed, first and second end plates provided at respective side faces of the core body member, and a fixing member inserted into through holes provided at the core body member and the end plates. The end plates include positioning portions at an outer or inner circumferential surface, wherein when the fixing member is engaged with the end plates, the positioning portion is engageable with positioning receive portions corresponding to the positioning portions and positioning at radially outer or inner portion of the end plate. When one of the end plates is placed facing the side face of the core body member in a reversed state, the end plate and the core body member are not assembled each other by positional relationship between the positioning portions, the positioning receive portions and the through holes.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 28, 2013
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takashi ASAGA, Toshiya SUGIYAMA
  • Publication number: 20130069467
    Abstract: An electric machine is described. The electric machine includes a rotor comprising a rotor disk and a plurality of permanent magnets magnetically coupled to the rotor disk. The plurality of permanent magnets include a substantially flat profile and are aligned in a substantially planar array. The electric machine also includes a stator comprising a solid stator core and a plurality of coils each wound around a coil insulating member. The stator core includes a plurality of stator teeth extending substantially parallel to an axis of rotation of the rotor.
    Type: Application
    Filed: March 22, 2011
    Publication date: March 21, 2013
    Applicant: REGAL BELOIT CORPORATION
    Inventors: Michael D. Smith, William A. Ziegler, Michael Garrett, Dean James Patterson, Roger C. Becerra, Ludovic Chretien, Darrel Buttram, Steven Peter Camilleri
  • Patent number: 8330319
    Abstract: A permanent magnet-less and brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by polyphase alternating currents. An uncluttered rotor is positioned within the magnetic rotating field and is spaced apart from the stator. An excitation core is spaced apart from the stator and the uncluttered rotor and magnetically couples the uncluttered rotor. The brushless excitation source generates a magnet torque by inducing magnetic poles near an outer peripheral surface of the uncluttered rotor, and the stator currents also generate a reluctance torque by a reaction of the difference between the direct and quadrature magnetic paths of the uncluttered rotor.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: December 11, 2012
    Assignee: UT Batelle, LLC
    Inventor: John S. Hsu
  • Publication number: 20120299435
    Abstract: A method for applying a retaining system above a rotor core of an electric machine includes providing a rotor including a rotor core, a rotor shaft and a coupling, cutting an inner ring from the rotor, connecting a retaining ring above the rotor core with a portion thereof extending above the rotor shaft, connecting the inner ring within a free end of the retaining ring, leaving a portion of the inner ring projecting from the retaining ring, providing an outer ring, connecting the outer ring above the projecting portion of the inner ring.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 29, 2012
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: Ralf Rotzinger, Christian Paatz, Anton Wehrle
  • Patent number: 8310122
    Abstract: A rotating machine has a stator and a permanent magnet rotor that is more easily made, lower cost, and lighter by virtue of a plurality of permanent magnet assemblies mounted on a rotor body. Each magnet assembly includes two facing core plate stacks supporting a permanent magnet between them. Each core plate stack is made from a plurality of core plates of substantially identical size and shape and with on or more holes in substantially the same location to form respective bores in the stack. A tie rod is formed in each bore and retains the plates in a stack via bevels in the holes of the end plates. Preferably, the tie rods also apply compressive force as a result of placing the stacked plates in an injection mold, injecting plastic into the mold to fill each bore with plastic, and allowing the plastic to cure. As the plastic cures, it shrinks so that the tie rods pull the end plates together. To enhance the pressure, the stacked plates can be compressed before and during the injection process.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: November 13, 2012
    Assignee: Wilic S.A.R.L.
    Inventors: Otto Pabst, Franco Gadrino
  • Patent number: 8310126
    Abstract: A radial flux permanent magnet AC motor/generator employs a flat circular stator plate having a plurality of separately-formed electromagnets mounted in a ring pattern on a top surface thereof. A circular flux ring fabricated of powdered metal is mounted to the stator plate outside the ring of electromagnets. A plurality of permanent magnets are mounted in a ring pattern on the outer cylindrical surface of a steel rotor. The stator plate and rotor are axially and diametrically aligned such that the ring of permanent magnets rotates in close proximity to and inside the ring of electromagnets. The electromagnets utilize powder metal cores shaped to have rounded corners and flat sides that permit the use of heavier gauge windings and eliminate the air gaps that exist between the core and windings of prior art electromagnets.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: November 13, 2012
    Assignee: Motor Patent Licensors, LLC
    Inventors: Thomas H. Hopkins, Nicholas R. Bries, Scott T. Graham, Howard F. Hendricks, Patrick J. Stoever
  • Patent number: 8232693
    Abstract: A resolver is configured to determine the rotational position of a first member that is selectively rotatable about an axis with respect to a second member. The resolver includes a stator core, a plurality of wire windings operatively connected to the stator core, a winding support between the windings and the stator core, and a cover at least partially enclosing the windings. One of the cover and the winding support defines a pin that is fittable inside a hole in the second member. The pin functions as a locating feature, which ensures that the stator is accurately mounted to the second member. Because the pin is part of the winding support or the cover, the locating feature does not entail the use of an extra part, thereby simplifying assembly of the stator.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: July 31, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Kevin P Coleman, Edward L. Kaiser
  • Publication number: 20120181894
    Abstract: A rotor for a rotary electric machine, the rotor being arranged to face a stator and being roratably attached to a housing, the rotor includes a core body formed by a plurality of core sheets laminated in a direction of a rotational axis of the rotor, first and second end plates arranged at both end surfaces of the core body in a direction where the core sheets are laminated, and a fixing member fixing the first and second end plates to the core body to hold the core body by the first and second end plates, wherein at least one of the first and second end plates is formed by a plurality of composition members overlapping in a thickness direction of the first end plate and the second end plate.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 19, 2012
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takashi Asaga, Toshiya Sugiyama
  • Publication number: 20120175995
    Abstract: A motor stator includes a plurality of separate core segments, a plurality of coils, and a fixing ring. Each core segment includes a yoke and a tooth extending from the yoke. The yokes are connected to form a substantially circular core, with the teeth extending inwards. Each coil is wound around a corresponding tooth. The fixing ring is fixed to the outer surface of the core.
    Type: Application
    Filed: December 27, 2011
    Publication date: July 12, 2012
    Inventors: Bao Ting LIU, Xiao Peng Ma, Arunkumar Subramanian
  • Publication number: 20120146448
    Abstract: A rotor for a synchronous reluctance machine includes a plurality of rotor modules disposed in an axial sequence along a common axis. Each rotor module includes a plurality of poles disposed in adjacent sectors about the common axis, each pole including a plurality of magnetic segments spaced apart from one another in radial direction, a support plate, provided on an axial side of the plurality of poles, and fastening means for fastening the plurality of poles to the support plate. The fastening means, preferably a plurality of axially arranged bolts or an adhesive, bonds the plurality of poles to the support plate.
    Type: Application
    Filed: February 14, 2012
    Publication date: June 14, 2012
    Inventors: Reza Rajabi Moghaddam, Yujing Liu, Cedric Monnay, Pierluigi Tenca
  • Publication number: 20120112601
    Abstract: A rotating electrical machine includes a rotor configured to rotate about an axis. The rotor includes a rotor lamination stack having a plurality of sheets pressed into a composite assembly in an axial direction and being radially divided into an inner mechanical part and an outer electrical part. A rotor winding is disposed in the electrical part of the rotor lamination stack. A stator is concentrically surrounding the rotor. A plurality of shear bolts is disposed in the mechanical part and configured to reach through the rotor lamination stack. A plurality of further bolts is disposed in the electrical part, the plurality of shear bolts and a plurality of further bolts being configured to press the plurality of sheets in the axial direction.
    Type: Application
    Filed: October 19, 2011
    Publication date: May 10, 2012
    Applicant: ALSTOM HYDRO FRANCE
    Inventors: Alexander SCHWERY, Serdar CIFYILDIZ, Hanspeter WALSER, Ricardo OKAI
  • Patent number: 8174162
    Abstract: Disclosed is a washing machine which includes a tub which holds laundry, a drum which is disposed in and rotates within the tub, a stator which is fixed to the tub, and a rotor which is fixed to the drum. The rotor includes a frame, a bushing installed on the frame, a motor shaft having an end which is inserted in and fixed to the bushing, a bearing interposed between the motor shaft and the tub, and at least one guide disposed between the motor shaft and the bushing at an end of the bushing.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: May 8, 2012
    Assignee: LG Electronics Inc.
    Inventors: Cha Seung Jun, Byoung Wook Min
  • Publication number: 20120104896
    Abstract: A rotating electric machine includes a rotor configured to rotate about an axis. The rotor includes a rotor laminate stack having layered laminations pressed in an axial direction to form a composite, the rotor laminate stack being radially divided into an inner mechanical region and an outer electrical region. A rotor winding is disposed in the electrical region of the rotor laminate stack. A stator concentrically surrounds the rotor. A press plate is configured to press the layered laminations in the axial direction, the press plate being radially divided into a separate inner press plate and a separate outer press plate so as to correspond to the radial division of the rotor laminate stack.
    Type: Application
    Filed: October 18, 2011
    Publication date: May 3, 2012
    Applicant: ALSTOM HYDRO FRANCE
    Inventors: Alexander SCHWERY, Serdar CIFYILDIZ, Hanspeter WALSER, Ricardo OKAI
  • Patent number: 8154168
    Abstract: A fixing enhancement mechanism for large iron core, including an iron core and two end rings. The iron core is composed of several arc-shaped bodies, which are successively connected in an annular form with their curvature centers coinciding with each other. The end rings are coaxially fixedly connected to two axial ends of the iron core respectively to keep the iron core in the annular form. The fixing reinforcement mechanism further includes an enhancement section having several rod-shaped enhancement members. The enhancement members are bridged between the two end rings in abutment with outer arc surfaces of the arc-shaped bodies. According to the fixing enhancement mechanism, the components for fixing the large iron core are simplified and the fixing performance is enhanced to keep the motor operating stably.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: April 10, 2012
    Assignee: Hiwin Mikrosystem Corp.
    Inventor: Ming-Hung Hsieh
  • Patent number: 8143760
    Abstract: The present invention relates to a miniature electrical drive (1), in particular a rotating field drive with permanent magnet excitation, having a stator (2) and a soft-magnetic return path element (6) which cylindrically surrounds the stator (2) and has a multiplicity of sheet-metal laminates (22) which are in the form of annular disks and are arranged in layers to form a cylindrical laminated core (20). The sheet-metal laminates (22) in the laminated core (20) are held prestressed exclusively with a force fit and in an interlocking manner in the axial and radial directions, and without adhesive or integral joint means such as this, in a supporting sleeve (24) which coaxially surrounds said sheet-metal laminates (22).
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: March 27, 2012
    Assignee: Dr. Fritz Faulhaber GmbH & Co. KG
    Inventors: Kornelius Reutter, J├╝rgen Teufel
  • Patent number: 8120227
    Abstract: A rotor of a rotary electric machine comprising a rotor shaft, a stack of laminations, which is coaxial to the rotor shaft and which comprises at least two radially-projecting poles, a field coil which is wound around each pole, such that the ends of the coil project out axially in relation to each external axial end radial face of the lamination stack and two plates for supporting the lamination stack, which are disposed axially on either side of the stack, housings being provided in the internal radial face of each plate for receiving the coil ends. At least one of the housings comprises a contact surface with the external radial face of the associated coil end.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: February 21, 2012
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Virginie Leroy, Marc Tunzini
  • Patent number: 8113801
    Abstract: A fan includes an inner rotor motor, which includes a housing, a rotor assembly and a stator assembly. The rotor assembly includes a rotor, which includes blades and is accommodated in the housing. The stator assembly is disposed in the housing corresponding to the rotor assembly. The stator assembly includes a coil disposed around the rotor. The coil is a flat helix structure formed by a continuous wire, and the flat helix structure forms a cylindrical plane perpendicular to a radius plane of the motor.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: February 14, 2012
    Assignee: Delta Electronics, Inc.
    Inventors: Hou-Chu Chen, Shui-Fa Tsai, Hung-Yi Liang, Lee-Long Chen, Chin-Chu Hsu