Rotor Patents (Class 29/598)
  • Patent number: 8968501
    Abstract: A method for building a magnetic core including laminations bound into packs for an electrical machine comprises steps of: stacking a group of laminations one on top of the other to build the core; binding into a pack the group building the core by locking members that axially compress the group with a predetermined clamping force; pre-compressing, before clamping the pack by the locking members, the group by a pre-compression press that is independent and separate from the locking members; measuring an axial length of the group while the group is being compressed by the pre-compression press; initially forming the group with a normally lacking number of laminations to initially have the measured length that is lower than or substantially equal to a desired length; and adding, after having completed pre-compression, an additional number of laminations to the group determined according to a difference between the desired and measured lengths.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: March 3, 2015
    Assignee: Magneti Marelli S.p.A.
    Inventors: Franco Ciampolini, Vincenzo Giorgianni, Patrick Giuliani
  • Publication number: 20150052934
    Abstract: A resin magnet, a magnetic pole position detection resin magnet, and a sleeve bearing, which is disposed inside the resin magnet, are integrally molded together with a thermoplastic resin in a rotor portion. At the same time, an impeller attachment portion is formed by the thermoplastic resin.
    Type: Application
    Filed: January 31, 2012
    Publication date: February 26, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroki Aso, Kazunori Sakanobe, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Publication number: 20150052935
    Abstract: In a rotor portion, a magnet formed in a cylindrical shape, a first magnet holder that holds an impeller-attachment-portion-side end portion of the magnet, a second magnet holder that holds a magnetic-pole-position-detection-element-side end portion of the magnet, a back yoke disposed inside the magnet, a sleeve bearing disposed inside the back yoke, and a position detection magnet that is provided on a surface of the second magnet holder at a side opposite to the side at which the magnet is attached and allows a magnetic flux of the position detection magnet to be detected by the magnetic-pole-position detection element are assembled integrally together with a thermoplastic resin, and the impeller attachment portion is formed of the thermoplastic resin.
    Type: Application
    Filed: January 31, 2012
    Publication date: February 26, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroki Aso, Kazunori Sakanobe, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Publication number: 20150052737
    Abstract: A system and method to reduce core loss in the stator of an electric motor by first preparing laminations of the stator and/or rotor in a water jetting operation, punching or stamping operation, laser cutting operation, or similar manufacturing operation, and then subjecting the laminations to a temperature treatment in a manner such that, upon assembly into a stator and/or rotor of an electric motor and operated within expected parameters, core loss is reduced. The system and method subjects the laminations to a cold bath preferably consisting of liquid nitrogen, after stamping but preferably prior to assembly, and then stacking the laminations together for assembly as a stator and/or rotor of an electric motor.
    Type: Application
    Filed: August 22, 2014
    Publication date: February 26, 2015
    Inventor: Robert Ross
  • Publication number: 20150048713
    Abstract: A method of making a stator module for use in a stator assembly of an electric machine includes temporarily supporting a plurality of stator segments in a desired orientation using a temporary support. The desired orientation of the stator segments is a relative orientation of the stator segments within the stator module. A mold is placed around the plurality of stator segments and the mold is filled with a potting material to form a stator module such that the potting material supports the stator segments in their desired orientation. The temporary support is removed.
    Type: Application
    Filed: January 31, 2013
    Publication date: February 19, 2015
    Applicant: Green Ray Technologies LLC
    Inventors: Ramon Anthony Caamaño, Hector Luis Moya, Jeffrey Wayne Harris, Robert R. Ferber
  • Publication number: 20150035402
    Abstract: An internal permanent magnet machine includes a rotor assembly having a shaft comprising a plurality of protrusions extending radially outward from a main shaft body and being formed circumferentially about the main shaft body and along an axial length of the main shaft body. A plurality of stacks of laminations are arranged circumferentially about the shaft to receive the plurality of protrusions therein, with each stack of laminations including a plurality of lamination groups arranged axially along a length of the shaft and with permanent magnets being disposed between the stacks of laminations. Each of the laminations includes a shaft protrusion cut formed therein to receive a respective shaft protrusion and, for each of the stacks of laminations, the shaft protrusion cuts formed in the laminations of a respective lamination group are angularly offset from the shaft protrusion cuts formed in the laminations in an adjacent lamination group.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 5, 2015
    Applicant: General Electric Company
    Inventors: Patel Bhageerath Reddy, Ayman Mohamed Fawzi EL-Refaie, Kum-Kang Huh, James Pellegrino Alexander
  • Publication number: 20150033787
    Abstract: In a pump, a resin magnet included in a rotor portion has a plurality of groove portions in an outer peripheral portion thereof, the groove portions extending in an axial direction.
    Type: Application
    Filed: January 31, 2012
    Publication date: February 5, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroki Aso, Kazunori Sakanobe, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Publication number: 20150035390
    Abstract: A rotating electrical machine has a rotor composed of laminations which are mounted on a shaft in an embodiment. The portion of the laminations adjacent the shaft has one or more slots, so designed as to increase the contact force between the lamination and the shaft as the speed of the rotor rises. This allows the laminations to be assembled to the shaft with a smaller interference fit yet retain a contact force at high speeds. The laminations may be assembled to the shaft with a suitable adhesive.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 5, 2015
    Inventors: Steven Paul Randall, Phillip George Dickinson
  • Patent number: 8943673
    Abstract: In compact drive, spiroid gear unit, and method for manufacturing a drive unit that includes at least an electric motor, a brake, a gear unit, and a frequency converter, the output shaft of the gear unit and the rotor shaft are positioned in parallel to each other, and the shaft-center distance is determined by at least one gear stage. The first gear stage includes a first toothed member connected to the rotor shaft, and a second toothed member, which engages with the first toothed member and is connected to an intermediate shaft, the brake, including at least a brake-rotor shaft, being integrated in the housing of the compact drive, the brake-rotor shaft being parallel to the rotor shaft, and the brake-rotor shaft being connected to a toothed member, which engages with the second toothed member.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: February 3, 2015
    Assignee: Sew-Eurodrive GmbH & Co. KG
    Inventors: Josef Schmidt, Bernhard Köhler, Thomas Leichter, Jochen Mahlein
  • Patent number: 8946969
    Abstract: A squirrel-cage rotor of an asynchronous machine, in particular a die-cast rotor, includes a rotatable shaft, a laminated core being rotation-locked on the shaft and having grooves and opposing end faces. A squirrel-cage winding has rotor rods disposed in the grooves and a cage ring disposed on each of the end faces and electrically connecting the rotor rods. A pair of retaining elements is disposed on the shaft, wherein each retaining element extends in a radial direction in form of a disk or a spoke and has in an axial direction a wall and/or an axially extending finger. The wall overlaps on a radial periphery in the axial direction both the cage ring and a predefined axial section of the rotor rods that terminate in the cage ring, without increasing an external diameter of the laminated core.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: February 3, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Volker Dölz
  • Publication number: 20150028702
    Abstract: A winding for a rotor for use in an electrical generator utilized in the power generation industry. The winding includes a plurality of axial sections and a plurality of transversely oriented end arc sections. An integrated leg section extends from each end arc section to form an associated corner section at an intersection of each leg section and associated end arc section. Each leg section is affixed to an associated axial section at a joint that is spaced apart from an associated corner section such that the joint is not subjected to stress concentration which occurs at the associated corner section.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 29, 2015
    Inventors: Mark A. Grobe, David Earl Hulsey, James V. Johnson, Robert F. Lemke, Robert W. Ralph, Christian T. Schneider, Stephen T. Soto, Randy Edward Whitener, Larry L. Zeller
  • Publication number: 20150028710
    Abstract: Provided is a rotor for a rotating electric machine which includes: an N pole integrally-stacked core in which a plurality of stacked tooth portions that contact with N pole side portions of adjacent ones of first permanent magnets are integrated with each other; and an S pole integrally-stacked core in which a plurality of stacked tooth portions that contact with S pole side portions of adjacent ones of the first permanent magnets are integrated with each other, and in which the N pole integrally-stacked core and the S pole integrally-stacked core are disposed around a rotation shaft having a non-magnetic outer circumferential surface so as to dispose the first permanent magnets and a gap therebetween.
    Type: Application
    Filed: March 13, 2013
    Publication date: January 29, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keiichiro Oka, Hiroyuki Akita
  • Publication number: 20150028718
    Abstract: An electrical machine exhibiting reduced friction and windage losses is disclosed. The electrical machine includes a stator and a rotor assembly configured to rotate relative to the stator, wherein the rotor assembly comprises a rotor core including a plurality of salient rotor poles that are spaced apart from one another around an inner hub such that an interpolar gap is formed between each adjacent pair of salient rotor poles, with an opening being defined by the rotor core in each interpolar gap. Electrically non-conductive and non-magnetic inserts are positioned in the gaps formed between the salient rotor poles, with each of the inserts including a mating feature formed an axially inner edge thereof that is configured to mate with a respective opening being defined by the rotor core, so as to secure the insert to the rotor core against centrifugal force experienced during rotation of the rotor assembly.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: General Electric Company
    Inventors: Tsarafidy Raminosoa, James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, David A. Torrey
  • Publication number: 20150026964
    Abstract: A method for servicing a rotor of a generator includes the steps of, dismantling a non-drive end of the generator, removing insulation from portions of an existing Wye ring and existing connection lugs, removing portions of the existing Wye ring near the existing connection lugs, installing a replacement Wye ring in the generator, connecting the replacement Wye ring to the existing connection lugs, and insulating the replacement Wye ring and the existing connection lugs. The method is performed on the generator in-situ.
    Type: Application
    Filed: July 29, 2013
    Publication date: January 29, 2015
    Applicant: General Electric Company
    Inventors: Ulrich Werner Neumann, Gary Randall Barnes, Richard Arland Ohl, JR., Brent Hamilton Holloway
  • Publication number: 20150026966
    Abstract: A method for manufacturing a permanent-magnet motor rotor includes manufacturing a rotary shaft, a permanent magnet, a front end cover, a rear end cover, and a magnetic yoke unit, where the magnetic yoke unit contains multiple pole shoe parts and one iron core part, where each pole shoe part and the iron core part are connected therebetween via a connecting strip; manufacturing a rotor spacer all positioning holes of the magnetic yoke unit correspond to the permanent-magnet through hole of the rotor spacer to form a permanent-magnet passage; inserting the permanent magnet into the permanent-magnet passage; inserting tightening bolts cutting off the mid-section of each connecting strip, overlapping the pole shoe parts to form a rotor pole shoe, overlapping the iron core parts to form a rotor iron core; and arranging respectively the front end cover and the rear end cover on a front end and a rear end.
    Type: Application
    Filed: April 26, 2012
    Publication date: January 29, 2015
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Youtong Fang, Jien Ma, Xiaoyan Huang, Jian Zhang, Qinfen Lu, Jiancheng Zhang, Wei Chen, Jiabin Liu
  • Publication number: 20150026965
    Abstract: A system for rebalancing a generator rotor includes a temporary bearing shield configured to support a non-drive end of the generator rotor, and a pony motor assembly configured for attachment to a drive end of the generator rotor. The pony motor assembly is configured to rotate the generator rotor during a rebalancing operation. The temporary bearing shield and the pony motor assembly enable the generator rotor to be rotated during an in-situ rebalancing operation.
    Type: Application
    Filed: July 29, 2013
    Publication date: January 29, 2015
    Applicant: General Electric Company
    Inventors: Ulrich Werner Neumann, Mark Randall Stewart
  • Publication number: 20150022033
    Abstract: The present disclosure relates to rotating electric machines which may be used for industrial applications, to a method for manufacturing a rotor of a synchronous reluctance motor, a rotor of a synchronous reluctance motor, and a synchronous reluctance motor. A rotor of a synchronous reluctance motor according to the present disclosure has a cylindrical rotor body part casted from a superparamagnetic material, and ferromagnetic flux guides arranged inside the casted cylindrical rotor body part. The flux guides are arranged to go through from one side of the outer circumference of the cylindrical rotor part to the other side of the outer circumference of the cylindrical rotor part in the direction of the direct axis of the synchronous reluctance motor.
    Type: Application
    Filed: October 2, 2014
    Publication date: January 22, 2015
    Inventors: Jouni Ikäheimo, Jere Kolehmainen
  • Patent number: 8935845
    Abstract: A method for manufacturing an inner rotor for a rotary electric machine, the rotor comprising a plurality of pole pieces surrounding a shaft, each pole piece being made from a stack of metal sheets (3) made of magnetic material, the pole pieces delimiting recesses between them for permanent magnets. The method comprises, in succession the steps of cutting blanks (33) each grouping together n metal sheets (3), “n” being the number of poles of the rotor, the n metal sheets of a blank being held together by temporary bridges (35) straddling the recesses, at least two bridges each comprising an outer lug (36), stacking the blanks while keeping them aligned via the outer lugs, immobilizing the stack of blanks, and eliminating all the temporary bridges in order to free up the radial access to the recesses.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: January 20, 2015
    Assignees: Compagnie Generale des Etablissements Michelin, Michelin Recherche et Technique S.A.
    Inventors: Maeick Blanc, Bertrand Vedy
  • Publication number: 20150015102
    Abstract: In various embodiments, a motor may be provided. The motor may include a base, a first rotor, a second rotor and a stator arranged between the first rotor and the second rotor, the stator including an alignment member for aligning the stator to the base.
    Type: Application
    Filed: February 13, 2013
    Publication date: January 15, 2015
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Chiew Leong Wong, Ralph Stephen Viskochil, Chao Bi
  • Publication number: 20150013148
    Abstract: A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.
    Type: Application
    Filed: July 2, 2014
    Publication date: January 15, 2015
    Inventor: Cheruvari Karthik Hari Dharan
  • Publication number: 20150015093
    Abstract: A rotor for an electrical machine, in particular synchronous reluctance machine, is provided. The rotor is formed as a cylindrical structure having a magnetically soft element formed with an even number of salient magnetic poles openings for forming magnetic flux barriers. The openings are at least partially filled with a diamagnetic and/or paramagnetic medium and the diamagnetic and/or paramagnetic medium may axially and tangentially fix the magnetically soft element relative to the rotor. A method for producing such a rotor and apparatus using the rotor, including a reluctance motor, in particular a synchronous reluctance motor, that uses the rotor are provided.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 15, 2015
    Inventors: Daniel Gontermann, Jochen Schaab, Joachim Schullerer
  • Publication number: 20150015108
    Abstract: According to one embodiment, there is provided an axial gap type permanent magnet electric rotating apparatus including a first and second rotor. All a magnetic-pole directions of a permanent magnets of the first and second rotor are the same. A portion between two permanent magnets along a circumferential direction of each rotor is made of a magnetic material having substantially the same size as that of the permanent magnet such that axial-direction surfaces are the same between the permanent magnets on two sides in the circumferential direction. Between the first rotor and the second rotor, a magnetic flux flows along an axial direction while making a loop and passes through an armature.
    Type: Application
    Filed: July 7, 2014
    Publication date: January 15, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yutaka Hashiba, Norio Takahashi, Makoto Matsushita, Masanori Arata, Toshio Hirano, Takaaki Hirose
  • Publication number: 20150008779
    Abstract: A disc-type electric machine with amorphous iron alloy axial magnetic circuit, its stator iron core with an axial center through hole is processed into a cylinder made from amorphous iron alloy lamination, and its outer cylindrical surface is uniformly processed with a plurality of equi-spaced axial armature slots towards the center axial line. In the stator iron core embedded winding assemblies with the same number as the armature slots, each winding assembly comprises a winding wire frame matched with the armature slot, each stator winding arranged respectively in a slot of the winding wire frame and a magnetic conducting body arranged in a through hole of the winding wire frame. The said disc-type electric machine has short axial size, less moving components, small eddy current loss, excellent high-frequency characteristic, low temperature rising, high efficiency, high power density, high material utilization rate and high efficient energy-saving.
    Type: Application
    Filed: February 22, 2012
    Publication date: January 8, 2015
    Applicant: SHENZHEN HOPEWIN TECHNOLOGY CO., LTD.
    Inventors: Lei Shi, Qingshan Liu, Wei Xie
  • Patent number: 8925182
    Abstract: A method for forming a rotor assembly including a cast rotor frame includes positioning a preheated rotor core defining a plurality of passages in a mold cavity such that the mold cavity and the rotor core define the rotor frame including a plurality of conductor bars defined by the plurality of passages in fluid communication with first and second end portions of the mold cavity. Molten metal is quiescently introduced into the mold cavity through an ingate and simultaneously flowed through the plurality of passages prior to filling at least one of the first and second end portions of the mold cavity to form the cast rotor frame. Entrained air and impurities may be displaced from the passages by the flow of molten metal and vented or entrapped by a biscuit. The rotor frame and conductor bars thus formed may be characterized by high conductivity, negligible porosity, and minimal oxides.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: January 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Qigui Wang, Kevin P. Coleman
  • Patent number: 8925362
    Abstract: The method is for manufacturing a rotor core having a cylindrical boss section formed with an axial hole, a disc section radially extending from one end of the boss section, and a plurality of claw sections provided along an outer periphery of the disk section. A boss section-side hole as a part of the axial hole is formed by plastic deformation in a preliminary shaping step. The remaining part of the axial hole of the billet disposed on a die is punched through using a center hole punch having a diameter smaller than an inner diameter of the boss section-side hole to form the disk section-side hole in the flush/punch through step, so that the axial hole is constituted of the boss section-side hole, the disk section-side hole and a step portion between the boss section-side hole and the disk section-side hole.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: January 6, 2015
    Assignee: Denso Corporation
    Inventor: Hiroaki Usami
  • Patent number: 8925402
    Abstract: An output shaft (14) of a starting device (1) is provided to equip a motor vehicle. This output shaft (14) comprises a mounting support (16), a driving element (17) on the mounting support (16) intended to transmit a rotation movement to a thermal engine, and a track (15) on the mounting support (16) intended to transmit a rotation movement to the mounting support (16), this track (15) being driven by a freewheel of a starter-head assembly of the starting device. The track (15) is attached and secured to the mounting support (16).
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: January 6, 2015
    Assignee: Valeo Equipements Electriques Moteur
    Inventor: Jean-Sebastien Metral
  • Publication number: 20150001982
    Abstract: A rotor has a rotor core with protruding fingers defining slots for conductors and support blocks at the axial ends of the fingers fixed by screws. The fingers have holes for housing the screws. The method for repairing the rotor includes removing the screws and support blocks, drilling the holes to increase the diameter thereof, providing plugs into the holes.
    Type: Application
    Filed: September 19, 2014
    Publication date: January 1, 2015
    Inventors: Thomas OPDERBECKE, Kornelia WEIDEMANN, Simon BALDASERA, Sanjiv Kumar MISHRA, Simon Malcolm POTTER, Markus NOE
  • Publication number: 20140375165
    Abstract: A core has accommodating slots each accommodating a permanent magnet. A fixing agent is injected into the space between the inner surface of each accommodating slot and the outer surface of the associated permanent magnet. A liquid-crystal polymer is used as the fixing agent. More specifically, liquid-crystal polyester is used.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 25, 2014
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Yoshiaki MASUBUCHI, Masaki SUGIYAMA, Masaaki TAKEMOTO, Masayuki KITO
  • Publication number: 20140377112
    Abstract: Downhole motors include a stator, which may be formed from a steel material and comprise a bore. At least one surface of the stator may be treated with a surface treatment. The surface treatment includes a nitrided region comprising nitrogen diffused into the steel material and a ceramic material adjacent to the nitrided region; the ceramic material defining an interior surface of the stator defining the bore. Methods of making downhole motors may include exposing a stator to an elevated temperature to heat the stator in a nitrogen-rich environment. Nitrogen may be diffused into a steel material of the stator and a nitrided region may be formed at one or more surfaces of the stator. The stator may be cooled. The stator may be removed from the nitrogen-rich environment. A ceramic material may be coated on the nitrided region of the stator.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Kyle L. Taylor, Chih C. Lin, Denis S. Kopecki
  • Publication number: 20140375166
    Abstract: A rotor includes: a shaft; a core around the shaft; at least one end ring connected to rotor bars that are at least partially enclosed in the core; and means for balancing the end ring around the shaft in a pre-balancing spinning process. A method includes: assembling rotor bars so that they are at least partially enclosed in a core of a rotor; connecting an end ring to ends of the rotor bars; inserting a shaft into the core; step for balancing the end ring around the shaft in a pre-balancing spinning process that involves spinning the rotor; and spinning the rotor in the pre-balancing spinning process.
    Type: Application
    Filed: June 19, 2013
    Publication date: December 25, 2014
    Inventors: Augusto E. Barton, Edwin M. Pearce, JR., Shyi-Perng Phillip Luan
  • Publication number: 20140373340
    Abstract: A higher-strength, non-grain-oriented electrical strip with high polarization, the electrical strip consisting of a steel alloy, wherein the limits of the following elements are maintained: Mn between 0.35 mass % and 0.65 mass %, Si between 2.0 mass % and 3.0 mass %, Al between 0.8 mass % and 1.4 mass %, and P between 0.14 mass % and 0.24 mass %; and a method for the production thereof.
    Type: Application
    Filed: September 17, 2012
    Publication date: December 25, 2014
    Inventors: Franz Dorninger, Roman Sonnleitner, Herbert Kreuzer
  • Patent number: 8914967
    Abstract: Method for producing a distributed lap winding for polyphase systems, in particular for alternators, wherein, in a first step, a chain of laps is formed with a linking direction, characterized in that, in a further step, at least one lap is rotated with its lap sides at right angles to the linking direction such that at least one lap side of one lap is arranged alongside at least one lap side of another lap such that the at least one lap side of one lap and the at least one lap side of another lap are arranged at a position which corresponds to a slot position.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: December 23, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Klaus Herbold, Gerlinde Weber, Christoph Schwarzkopf, Helmut Kreuzer
  • Publication number: 20140368082
    Abstract: A rotor including: a shaft; a structure comprising at least one end ring and rotor bars, wherein at least the end ring comprises a material subject to expansion or movement radially outward from the shaft upon a rotor balancing process that involves spinning of the structure; a core that at least partially encloses the rotor bars; and means for limiting the expansion or movement of the structure radially outward. A method including: providing a structure comprising at least one end ring and rotor bars, wherein at least the end ring comprises a material subject to expansion or movement radially outward from the shaft upon spinning of the structure; assembling a rotor from the structure and a core, the core at least partially enclosing the rotor bars; spinning the rotor in a rotor balancing process; and limiting the expansion or movement of the structure radially outward in the rotor balancing process.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Applicant: TESLA MOTORS, INC.
    Inventor: Augusto E. Barton
  • Publication number: 20140368079
    Abstract: Embodiments provide a method for assembling a motor. The method may include providing a first rotor, a second rotor and a stator; and assembling the first rotor, the second rotor and the stator such that the stator is arranged between the first rotor and the second rotor.
    Type: Application
    Filed: February 13, 2013
    Publication date: December 18, 2014
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Chiew Leong Wong, Ralph Stephen Viskochil
  • Patent number: 8912702
    Abstract: A process and a blanking mold are described for the production of a ferromagnetic core for electric motors formed by a plurality of segments. The laminations are blanked from a sheet of ferromagnetic material and stacked in an accumulation chamber of the blanking mold, along which they advance until a segment constituted by a stack having a preset number of laminations is formed, which is mechanically connected to an adjacent segment, thereby forming a rectilinear sequence of segments. The segments are hinged to each other with the possibility of mutual rotation to allow the sequence of segments to be brought from the rectilinear condition to a closed circular configuration.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: December 16, 2014
    Assignee: Ernesto Malvestiti S.p.A.
    Inventor: Sergio Confalonieri
  • Patent number: 8910371
    Abstract: A rotor for an induction motor includes a rotor core having first and second ends and a plurality of conductor bars. Each conductor bar has a respective first end extending beyond the first end of said rotor core. Each first exposed end has a respective enclosed opening. The rotor also includes an end ring comprising a casting of material flowed between the respective first ends of the conductor bars and through the respective closed openings.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: December 16, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Richard M. Kleber, Thomas A. Perry, John S. Agapiou
  • Publication number: 20140362672
    Abstract: In a rotor manufacturing method of the present invention, firstly, a rectangular magnet element whose magnetic pole direction is recognizable is formed by a magnetic material being sintered while a magnetic field is being applied thereto, and subjected to a demagnetization process, and position regulating sections are formed on the magnet element symmetrically relative to the magnetic poles. Accordingly, a magnet can be easily formed. Secondly, the demagnetized magnets are individually transported without being attracted to each other. Accordingly, the direction of each magnetic pole of the demagnetized magnets can be aligned to one direction and successively arranged. Thirdly, when a gear section is to be formed on the magnet, it is positionally adjusted by the position regulating sections so as to have a fixed positional relationship relative to the magnetic poles of the demagnetized magnet. Accordingly, the gear section can be precisely formed relative to the magnetic poles.
    Type: Application
    Filed: May 15, 2014
    Publication date: December 11, 2014
    Applicant: CASIO COMPUTER CO., LTD.
    Inventor: Yuta SAITO
  • Patent number: 8901795
    Abstract: A permanent magnet rotor includes at least one permanent magnet and a rotor core including a first end and a second end. The rotor core includes a plurality of permanent magnet openings that are each configured to receive a permanent magnet. The permanent magnet rotor also includes a first rotor end lamination coupled to the first rotor core end. The first rotor end lamination includes a plurality of inner lamination walls defining a first lamination opening and a second lamination opening circumferentially adjacent the first lamination opening. At least one inner lamination wall includes at least one permanent magnet retention feature configured to secure the permanent magnet within a corresponding permanent magnet opening. The at least one permanent magnet retention feature includes at least one tab extending radially from at least one of the plurality of inner lamination walls within the first rotor end lamination.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: December 2, 2014
    Assignee: Regal Beloit America, Inc.
    Inventors: Subhash M. Brahmavar, Harold C. Kingrey, John R. Oakes, Daniel S. Figgins, Jeffrey A. Hall, Donald E. Bair
  • Publication number: 20140346780
    Abstract: A connection assembly for a power system is disclosed. The connection assembly may have a housing configured to be connected to a stationary portion of a generator and a bearing operatively connected to the housing. The connection assembly may also have a shaft supported by the bearing and configured to be connected to a rotor of the generator. The connection assembly may additionally have an adapter coupled to the housing and configured to be connected to an engine. The shaft may extend through an opening in the housing and an opening in the adapter to connect with a crankshaft of the engine.
    Type: Application
    Filed: May 21, 2013
    Publication date: November 27, 2014
    Applicant: Progress Rail Services Corporation
    Inventor: Stuart Charles Holder
  • Publication number: 20140346915
    Abstract: A rotating electrical machine includes a stator and a rotor. The stator winding includes a plurality of conductor segments inserted through the slots from one end surface of the stator core with end portions of the conductor segments projecting out beyond another end surface of the stator core. The conductor segments include an undeformed portion, a plastically deformed portion formed at the end portions thereof and a tapered portion. The plastically deformed portion has a dimension of the plastically deformed portion along a circumferential direction that is greater than a dimension of the undeformed portion along the circumferential direction and so that a dimension of the plastically deformed portion along a radial direction is smaller than a dimension of the undeformed portion along the radial direction. The conductor segments are welded together at tops of the plastically deformed portions thereof.
    Type: Application
    Filed: December 13, 2012
    Publication date: November 27, 2014
    Inventors: Takashi Ishigami, Yutaka Matsunobu, Yoshimi Mori
  • Publication number: 20140346918
    Abstract: A stationary portion of a motor includes a stator core, insulators, and coils. The stator core includes a core back having an annular shape, and a plurality of teeth extending radially inward from the core back. A radially inner end portion of each tooth has a circumferential width substantially equal to or smaller than a circumferential width of a remaining portion of the tooth. The core back includes a protruding portion protruding radially inward between adjacent teeth, a cut extending radially outward from the protruding portion, and a through hole extending in an axial direction through the core back defined at a radially outer end portion of the cut. The protruding portion increases a radial dimension of the core back to achieve a reduction in magnetic reluctance in the vicinity of the cut.
    Type: Application
    Filed: September 14, 2012
    Publication date: November 27, 2014
    Applicant: NIDEC CORPORATION
    Inventors: Yoshihiro Uchitani, Yuji Tanaka, Tomoyoshi Yokogawa
  • Patent number: 8896177
    Abstract: An interior permanent magnet motor in provided which is made up of a permanent magnet, and a rotor core of which an insertion aperture for the permanent magnet to be inserted thereinto is formed in the rotor core. Additionally, the interior permanent magnet motor includes a first end plate which is connected to the rotor core and of which a first seating portion for the permanent magnet is disposed thereto is formed in the first seating portion and a second end plate which is connected to the rotor core and of which a second seating portion for the permanent magnet is disposed thereto is formed in the second end plate.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: November 25, 2014
    Assignee: Hyundai Motor Company
    Inventor: Myunggyu Kim
  • Publication number: 20140339938
    Abstract: Embodiments of a gas turbine engine actuation system are provided, as are embodiments of a high temperature actuator and methods for the manufacture thereof. In one embodiment, the gas turbine engine actuation system includes an actuated gas turbine engine component and a high temperature actuator, which has a rotor mechanically linked to the actuated gas turbine engine component and a stator surrounding at least a portion of the rotor. The stator includes, in turn, a coil support structure having a plurality of spokes extending radially therefrom. A plurality of pre-formed electromagnetic coils is circumferentially distributed about the coil support structure. Each of the plurality of pre-formed electromagnetic coils is inserted over at least one of the plurality of spokes in a radial direction. The stator further includes an inorganic dielectric material in which each of the plurality of pre-formed electromagnetic coils is at least partially embedded.
    Type: Application
    Filed: March 13, 2013
    Publication date: November 20, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: HONEYWELL INTERNATIONAL INC.
  • Publication number: 20140338184
    Abstract: A method and assembly for forming a rotor include forming a rotor core having a plurality of voids and placing the formed rotor core into a die cavity. The method includes moving a plurality of support shoes to define an outer diameter of the die cavity, and injecting at least one of the plurality of voids with a magnetic slurry. At least one permanent magnet is formed from the magnetic slurry by applying pressure to the rotor core and the magnetic slurry within the die cavity and by applying a magnetic field to align the magnetic slurry. After forming the at least one permanent magnet within the rotor core, the plurality of support shoes are retracted and the rotor core removed with the at least one permanent magnet formed therein.
    Type: Application
    Filed: April 14, 2014
    Publication date: November 20, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Edward L. Kaiser, Amanda Luedtke, Peter J. Savagian, Sinisa Jurkovic
  • Publication number: 20140339945
    Abstract: A component includes magnet elements adjoined to each other to form an arced segmented magnet section that is configured to fit in an a curved rotor slot gap of an electric machine. An electric machine that employs the component and method of assembly of the component are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
    Type: Application
    Filed: May 17, 2013
    Publication date: November 20, 2014
    Applicant: General Electric Company
    Inventors: Alexander Felix Fiseni, Mohamed Osama, Francesco Papini
  • Patent number: 8887376
    Abstract: The invention relates to a method for the production of a soft magnetic core for generators and generator with a core of this type. To produce a core, a plurality of magnetically activated and/or magnetically activatable textured laminations is produced from a CoFeV alloy. This plurality of laminations is then stacked to form a core assembly. Then the core assembly, if consisting of magnetically activatable laminations, is magnetically activated. Finally, the magnetically activated core assembly is eroded to produce a soft magnetic core. A core of this type is suitable for a generator with a stator and a rotor for high-speed aviation turbines, the laminations in the core assembly being oriented in different texture directions relative to one another.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: November 18, 2014
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Joachim Gerster, Witold Pieper, Rudi Ansmann, Michael Koehler, Michael Von Pyschow
  • Publication number: 20140332194
    Abstract: A heat sink element for a device is operable by relative rotation of a conductor rotor assembly and a magnet rotor assembly. The heat sink element includes a base portion and a plurality of fins. The base portion includes a mounting face that is sized and dimensioned to be coupled to the conductor rotor assembly, and an opposing convective heat transfer face. The plurality of fins extend from the convective heat transfer face of the base portion. Adjacent fins are separated by a channel that extends along a longitudinal direction of the fins. The fins include at least one surface disruption on a top surface thereof.
    Type: Application
    Filed: February 13, 2014
    Publication date: November 13, 2014
    Applicant: MagnaDrive Corporation
    Inventors: Dan Durland, Mike Tomczak, Jeongkwan Lee, Dennis Noson
  • Patent number: 8884490
    Abstract: A stator (32, 132, 232) or rotor for an electrodynamic machine, in particular for a torque motor acting as an internal or external rotor, comprises a plurality of partly annular plate segments (10, 110, 210) which are stacked in a manner to constitute several partly annular plate segment blocks (34, 134, 234). Combined into a ring, said blocks constitute the stator (32, 132, 232) or rotor the particular adjacent plate segment blocks (34, 134, 234) being mutually clamped by a clamping means. This clamping means already may be integrated into said plate segment blocks or it may be constituted by a housing (145, 245) of which the segments (148, 248) can be clamped against one another. If illustratively the housing (145) is emplaced externally around the stator (132) then the inside diameter of said housing may be varied during installation of the stator (132) or rotor in a manner that the housing may be positioned around the installed plate segment blocks (34, 134) and also may be radially clamped against them.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: November 11, 2014
    Inventors: Hans Meier, Hubert Scheich, Hugo Isert
  • Publication number: 20140327343
    Abstract: A device for addition of motive force to a vehicle, with rotor-plate, rotor-arms, rotor permanent magnets, stator-plate, stator columns, stator electromagnets, and battery, cell, or other energy storage device. The device is retro-fittable on existing wheel assemblies, and installation coverts an internal combustion vehicle to a hybrid with electric propulsion.
    Type: Application
    Filed: April 15, 2014
    Publication date: November 6, 2014
    Inventors: Charles Hampton Perry, Paul Walter Martin, III
  • Publication number: 20140327329
    Abstract: A solid fixing resin composition, which has excellent filling properties, and a rotor using the same are provided. The fixing resin composition is used to form a fixing member constituting a rotor which includes a rotor core (110) which has a laminate formed by lamination of a plurality of plate members, is fixed and installed on a rotating shaft, and has a plurality of hole portions (150) arranged along the peripheral portion of the rotating shaft, provided in the laminate; a magnet (120) inserted in the hole portion (150); and a fixing member (130) formed by curing a fixing resin composition, filled in the separation portion between the hole portion (150) and the magnet (120), the resin composition including a thermosetting resin (A) containing an epoxy resin; a curing agent (B); and an inorganic filler (C), in which the ICI viscosity at 150° C. of the epoxy resin is equal to or less than 3 poises.
    Type: Application
    Filed: October 2, 2012
    Publication date: November 6, 2014
    Inventor: Tetsuya Kitada