Having Particular Mating Joint Structure Patents (Class 310/216.009)
  • Patent number: 10873231
    Abstract: The present invention relates to a brushless dc electric motor (1) comprising: a rotor (3) comprising at least two pairs of poles, a stator (5) having a plurality of teeth (D1, D2) around which windings (B1, B2, B3, B?1, B?2, B?3) forming coils for electromagnetic excitation of the rotor (3) are wound, wherein the stator (5) comprises a first type of tooth (D1) covering a first electrical angle and a second type (D2) of tooth covering a second electrical angle different from the first electrical angle and wherein a phase of the motor is formed by windings (B1, B?1 or B2, B?2 or B3, B?3) wound onto teeth of the first type (D1) and second type (D2).
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: December 22, 2020
    Assignee: Valeo Systèmes d'Essuyage
    Inventor: Jose Luis Herrada
  • Patent number: 10505408
    Abstract: A stator includes core pieces in which at least first and second laminate members are laminated, the first laminate member includes a first tooth portion and a first core back portion, the second laminate member includes a second tooth portion and a second core back portion, the first core back portion includes a first protrusion on one side thereof in a circumferential direction and a first recess on another side thereof in the circumferential direction, the second core back portion includes a second recess on one side thereof in a circumferential direction and a second protrusion on the other side thereof in the circumferential direction, and an area of a region in which the first core back portion and the second core back portion of the core piece adjacent thereto overlap in a lamination direction is greater than a circumferential cross-sectional area of the first core back portion circumferentially inward from the first protrusion.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: December 10, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Yasuaki Nakahara, Takayuki Migita, Hiroshi Kitagaki, Takeshi Honda, Hisashi Fujihara
  • Patent number: 10331085
    Abstract: A coil core including a coil block configured by a coil wound around the coil core which is coupled to a stator, a linear portion around which a wire is wound to form a coil; and coil-side couplers which are extended to both sides along a direction orthogonal to an extending direction of the linear portion, wherein the coil-side couplers include a thinner portion than the linear portion.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: June 25, 2019
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Yuta Saito, Hiroyuki Hosobuchi, Junro Yano
  • Patent number: 9479015
    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: Grant
    Filed: December 27, 2011
    Date of Patent: October 25, 2016
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Bao Ting Liu, Xiao Peng Ma, Arunkumar Subramanian
  • Patent number: 9391478
    Abstract: Due largely to their high torque-to-current and torque-to-volume ratios, permanent magnet (PM) motors and generators are increasingly being used in a wide range of high performance applications, such as industrial drives, robotics, computer peripherals, and automotive applications. The present invention utilizes stator modularity to enable cost efficiency by significantly decreasing stator core manufacturing costs, and coil forming and fixturing costs in several ways. Minimizing costs extend to a novel, lightweight, support structure that does not require the usual encasement structure. The approach presents a challenge to mitigating cogging torque via popular methods; therefore a novel anti-cogging approach was developed that is a natural outgrowth of the modular layout instead of being negatively impacted by. The result is a low cost PM machine design and method with low cogging torque.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: July 12, 2016
    Inventor: Devon R. McIntosh
  • Patent number: 9018820
    Abstract: The present invention relates to an integral or a non-integral stator structure for reducing the manufacturing complexity by eliminating the boot part of the tooth part thereof. The stator structure is made of a core material, and includes: a plurality of stator units, each having a tooth part and an annular part, in which different stator units can be connected with each other integrally or non-integrally, so as to form an annular stator structure. The tooth part of each stator unit is formed in a pillar shape that has a first end and a second end, and the first end is connected to the annular part.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: April 28, 2015
    Assignee: National Taiwan University of Science and Technology
    Inventors: Jonq-Chin Hwang, Chun-Yu Hsiao, Sheng-Nian Yeh
  • Patent number: 9013086
    Abstract: A stator for an electric motor includes a stator core including a yoke and a plurality of arms extending radially from the yoke. The stator includes an end piece secured to a radial end of each arm of the stator core. The stator core has a length defined along a longitudinal axis of the stator, and each end piece has a length defined along the longitudinal axis of the stator. The length of each end piece is greater than the length of the stator core.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: April 21, 2015
    Assignee: Whirlpool Corporation
    Inventors: Luiz V. Dokonal, Evandro J. Meurer, Marcelo N. Schlickmann, Orlando Starke, Rodrigo S. Teixeira
  • Patent number: 8981614
    Abstract: Included are a pair of insulators arranged on axial end surfaces of a split core, and an insulating film attached to lateral side surfaces of the tooth part, for insulating the split core from a coil wound around the tooth part. Each insulator includes projections projecting further than a tooth front end part in the circumferential direction, slits which are formed in the respective projections to a corresponding axial end surface side of the tooth front end part and into which the insulating film is inserted, and ribs formed, on an end surface side in the circumferential direction, in the respective projections. The insulating film inserted into the slits is folded back to a back yoke part side with the ribs interposed therein, and fixed by being interposed between the ribs at tip portions of projections of adjacent insulators. Accordingly, the insulating film can be assuredly fixed and prevented from escaping from a slot.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: March 17, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keiichiro Oka, Hiroyuki Akita, Toshio Arai
  • Patent number: 8970086
    Abstract: A stator core for a motor is disclosed, the stator core including at least one cylindrical stator core body formed in one body by using a metallic mold so that a plurality of teeth is protruded to a same direction each at a predetermined gap, and both distal ends of the stator core body are coupled through a bending process for each horizontal predetermined section about a center of the teeth, and a fixing unit provided at both distal ends of stator core body to fix the stator core body in a cylindrical shape.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: March 3, 2015
    Assignee: LG Innotek Co., Ltd.
    Inventor: Jungwoo Jo
  • Patent number: 8970084
    Abstract: A stator core of a rotating electrical machine includes an annular first core plate including a plurality of first core plate pieces and an annular second core plate including a plurality of second core plate pieces. A predetermined number of the first and second core plates are alternately laminated such that stator fixing portions overlap with each other and such that positions of joints between the first core plate pieces of the first core plates differ from positions of joints between the second core plate pieces of the second core plates in the circumferential direction.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: March 3, 2015
    Assignee: Aisin AW Co., Ltd.
    Inventors: Hiroaki Sanji, Yasuo Yamaguchi, Yuya Honda
  • Publication number: 20150048712
    Abstract: An electrical machine includes a rotor with a rotational axis, a coil arranged circumferentially with respect to and fully encircling the rotational axis, and a stator assembly. The stator assembly includes first and second lamination stacks comprising associated pluralities of laminae, the stacks being arranged circumferentially with respect to the rotational axis on opposing sides of the coil for conducting magnetic flux. The stacks are configured with gaps generally radially through the laminae thereof, defining separate circumferential segments in each laminae, to prevent creating a continuous electrical circuit around the rotational axis in the segments. Each laminae has a connecting ring spaced radially from the segments, and beams connecting the segments to the ring as a unitary piece. Back return elements extend axially between the stacks to provide a flux path therebetween, and are positioned circumferentially between adjacent parts of the beams and radially between the segments and the ring.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 19, 2015
    Applicant: Electric Torque Machines, Inc.
    Inventors: Thomas Janecek, Tyler Williams, John Dyer
  • Publication number: 20150042199
    Abstract: A stator core includes an annular yoke portion and tooth portions, wherein an outer peripheral edge of the yoke portion is attached to an inner peripheral surface of a motor case. The yoke portion includes displacement portions displaced by receiving the radially-inward pressing force from the motor case, and deformation portions deformed according to the displacements of the displacement portions to generate tensile stress so as to form tensile stress regions through which magnetic flux passes between the tooth portions and the yoke portion or so as to counterbalance compression stress generated by the pressing force from the motor case. The displacement portions perform the displacements by attaching the yoke portion to the annular member with the interference.
    Type: Application
    Filed: February 7, 2013
    Publication date: February 12, 2015
    Inventors: Kazuo Iwata, Yohei Kameda
  • Patent number: 8941947
    Abstract: A thin spindle motor having a stator core with sufficient swaging strength even using thin magnetic steel sheets is provided, whereby the magnetic loss and the power consumption of the spindle motor are reduced. The stator core is formed by laminating plural stator laminations with a thickness of 0.1 to 0.2 mm and joined by a swaging portion. The swaging portion has an approximately rectangular shape having long sides extending along a radial direction when viewed from an axial direction. The swaging portion has a cross section with a middle portion parallel to the radial direction and a slope portion at the both sides when viewed from a circumferential direction, thereby forming a recess. The recess has a depth that is less than the thickness of the stator lamination whereby the swaging portion does not cut the stator lamination.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: January 27, 2015
    Assignee: Minebea Co., Ltd.
    Inventors: Hideaki Showa, Ryoichi Kurosawa, Hironobu Tsuge
  • Patent number: 8922091
    Abstract: A spindle motor is provided, the motor including a bearing assembly including a bearing housing that further includes a housing body and a plurality of staircase sills formed at a periphery of the bearing housing, and a bearing disposed inside the bearing housing; a stator including a core that further includes core pieces formed with through holes at which each of the staircase sills is hitched, and a coil wound on the core; a rotation shaft inserted into a rotation shaft hole of the bearing; and a rotor including a yoke coupled to the rotation shaft and a magnet secured at an inner lateral surface of the yoke to face the core.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: December 30, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventor: Heechul Jung
  • Patent number: 8917007
    Abstract: Disclosed are a single rotor-type axial gap motor with low magnetic loss and high output, and a pump device using the axial gap motor. A first contact surface (231) is provided on the lateral surface in one circumferential direction of a yoke strip (23), and a second contact surface (232) is provided on the lateral surface in the other circumferential direction of the yoke strip (23), wherein the first contact surface (231) and the second contact surface (232) are aligned with each other. Defining As1 and As2 as the surface areas (As) of the first and second contact surfaces (231, 232), and Ap1 and Ap2 as the projected surface areas (Ap) of the lateral surfaces of the aforementioned yoke strip seen from the circumferential direction, it holds that As>Ap.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: December 23, 2014
    Assignee: Fujitsu General Limited
    Inventors: Hirokazu Matsuzaki, Ken Maeyama, Motoaki Fujimoto, Tomonori Kojima
  • 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
  • Publication number: 20140361657
    Abstract: The invention relates to a magnetic circuit for a rotary electric machine, including: a plurality of packs of sheets stacked to form sectors, the facing sidewalls of said packs including nestable projections; and inserts introduced into housings defined at least partially by the nesting of the projections, said inserts being used to assemble the sectors to one another.
    Type: Application
    Filed: December 4, 2012
    Publication date: December 11, 2014
    Applicant: MOTEURS LEROY-SOMER
    Inventor: Patrick Vohlgemuth
  • Patent number: 8887377
    Abstract: The method for manufacturing a stator core includes: a punching step in which magnetic segments are punched out of an electromagnetic steel sheet that is coated with an organic insulating coating; a laminating step in which a laminated body is formed by laminating a predetermined number of the punched magnetic segments; a first preheating step in which a welding position on a wall surface of the laminated body is heated locally from a first end to a second end in a direction of lamination to decompose an organic component in the insulating coating thermally at the welding position; and a first welding step in which the welding position at which the organic component in the insulating coating is decomposed thermally is welded from the first end to the second end in the direction of lamination to interconnect and integrate the laminated magnetic segments.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuya Hasegawa
  • 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: 20140300242
    Abstract: A brushless motor may comprise a stator. The stator may comprise a core body comprising a plurality of partial cores and a coil wire. Each partial core may comprise a yoke positioned on an outer edge of the stator, teeth extending towards a rotor from the yoke, and a connector extending to an adjacent partial core from the yoke, to be connected to the yoke of the adjacent partial core. The stator may be formed to be in a tubular state by being transformed from an opened state. Each of the yokes of the partial cores may comprise a facing surface facing the yoke of the adjacent partial core. At least one set of the facing surfaces among a plurality of sets of the facing surfaces facing each other may be disposed with a gap in between in the circumferential direction of the stator.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 9, 2014
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Yoshihiko Honda
  • Patent number: 8853914
    Abstract: A stator core capable of improving stator core segments in assemblability, positioning accuracy and rigidity is provided. A stator core includes a plurality of stator core segments, and a yoke part of each stator core segment has a first junction and a second junction joined to other adjacent stator core segments. A protrusion is formed at the first junction, and a recess capable of receiving the protrusion is formed at the second junction. The opening area of the recess increases from a deepest section of the recess to an opening of the recess. In the yoke part, a first caulking site where the stator core segment is caulked in an axial direction is formed on an arc passing through the central part of a radial length of the protrusion and extending in a circumferential direction.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: October 7, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhiro Goto, Tatsuhiko Mizutani, Hiroyuki Ikuta, Yasuhide Yagyu
  • Patent number: 8829759
    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: Grant
    Filed: October 19, 2011
    Date of Patent: September 9, 2014
    Assignee: Alstom Renewable Technologies
    Inventors: Alexander Schwery, Serdar Cifyildiz, Hanspeter Walser, Ricardo Okai
  • Patent number: 8810100
    Abstract: A rotor having a dividable core for an electric motor, and a production method thereof. A rotor has a generally annular supporting member; a plurality of shaft portions positioned on the supporting member in a circumferential direction at regular intervals, the shaft portions extending generally parallel to a rotation axis of the rotor; and a plurality of divided cores each having a hole portion which is fitted to each shaft portion. By annularly connecting the divided cores, a generally annular dividable core for the rotor is formed. Each divided core has connecting portions at both circumferential ends thereof, and each connecting portion is configured to be connected to a connecting portion of a neighboring divided core while the divided core is fitted to the shaft portion.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: August 19, 2014
    Assignee: Fanuc Corporation
    Inventor: Tatsuya Senoo
  • Patent number: 8803389
    Abstract: A stator includes a stator core formed from a plurality of split cores arranged in a circumferential direction, and a cylindrical body that surrounds the stator core from a periphery and secures the stator core. The split cores each have a first end portion on one end in the circumferential direction, and a second end portion on the other end in the circumferential direction. The first end portion has a protruding portion that protrudes outward in the circumferential direction, and the second end portion has a depressed portion that is depressed inward in the circumferential direction and fits together with the protruding portion of the first end portion of an adjacent split core.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: August 12, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuhiko Mizutani, Masahiro Sakai
  • Patent number: 8786159
    Abstract: A fixing structure for a stator core includes a stator core, a ring member fitting on the stator core, and a case covering the stator core and the ring member. The case includes a fixing portion fixing the ring member, and a fitting portion fitting on the ring member.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: July 22, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroyuki Hattori
  • Publication number: 20140167556
    Abstract: Disclosed is an electric rotating machine that includes a stator and a rotor. The stator includes a housing and a cylindrical stator core secured to the housing by shrinkage fitting. The rotor is rotatably disposed inside the stator. The stator core is formed of two or more circumferentially split cores. Spilt surfaces of the split cores are shaped in such a manner that the amount of distortion caused on the split surfaces on the outside diameter side by the shrinkage fitting is greater than the amount of distortion caused on the split surfaces on the inside diameter side by the shrinkage fitting.
    Type: Application
    Filed: July 31, 2012
    Publication date: June 19, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Itsuro Sawada, Kanako Nemoto, Hideaki Mori, Satoshi Yamamura, Satoshi Kikuchi
  • Patent number: 8736134
    Abstract: A stator segment for a segmented stator of an electric machine includes insulative material configured for overlapping with insulative material of an adjacent stator segment to provide continuous insulation along a joint between the adjacent stator segments. Additionally, or alternatively, the stator segment can include one or more alignment tabs configured to engage a surface of an adjacent stator segment to inhibit relative axial movement between adjacent stator segments.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: May 27, 2014
    Assignee: Nidec Motor Corporation
    Inventor: David M. Lyle
  • Publication number: 20140139068
    Abstract: A laminated core manufacturing method is linearly arranging and punching out a plurality of separate core pieces formed of a back yoke portion and a magnetic-pole teeth portion protruding from the back yoke portion and die-cut caulking. The manufacturing method includes: a first step of punching out a first region located on an opposite side to the magnetic-pole teeth portion between adjacent ends of the back yoke portions of the core pieces; a second step of punching out a second region located on a side of the magnetic-pole teeth portion between the adjacent ends of the back yoke portions of the core pieces; a third step of punching out a region that brings the first region punched out in the first step and the second region punched out in the second step into communication; and a fourth step of forming the magnetic-pole teeth portion by punching.
    Type: Application
    Filed: October 6, 2011
    Publication date: May 22, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Daisuke Shijo, Hiroyuki Akita
  • Patent number: 8704422
    Abstract: An electromagnetic machine has a rotor and a stator core. The stator core has a plurality of radially-extending teeth and a plurality of bridges having opposite ends secured to corresponding teeth. Stator windings are positioned at least partially in slots between the teeth. Each of the bridges is in a compressed configuration and includes a midsection radially offset from the ends. In a method of making an electromagnetic machine, stator windings are wound around the teeth of the stator core while the stator core is in an expanded configuration in which each of the slots is relatively wider and the configuration of the stator core is changed after winding, for example by compressing or otherwise deforming the bridges, to a compressed configuration in which each of the slots is relatively narrower. The bridges hold the teeth in the expanded configuration facilitating high slot fill without using a segmented stator.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: April 22, 2014
    Assignee: Nidec Motor Corporation
    Inventor: Jason Jurkowski
  • Publication number: 20140091671
    Abstract: A stator core is formed by laminating a plurality of annular core plates one on top of another. The stator core includes a cylindrical yoke and a plurality of radially protruding teeth arranged at a specified interval along a circumferential direction of the yoke. Each of the core plates includes a plurality of annularly-arranged split cores each having a yoke portion forming the yoke and a tooth portion protruding from the yoke portion and forming the teeth. The yoke portion includes a first yoke section and a second yoke section extending different lengths at opposite lateral sides of the tooth portion.
    Type: Application
    Filed: June 27, 2013
    Publication date: April 3, 2014
    Inventor: Kazuaki IRIE
  • Patent number: 8674564
    Abstract: A power tool includes a shaft rotatable about an axis and configured to drive a tool element, a motor armature, a first field coil, and a second field coil. First and second symmetrical stack parts each include a pole piece that is configured to receive respective first and second field coils. The first field coil is coupled to the pole piece of the first stack part such that portions of the first field coil extend past pole tips of the first stack part, and the second field coil is coupled to the pole piece of the second stack part such that portions of the second field coil extend past pole tips of the second stack part. The first stack part is coupled to the second stack part such that the first stack part and the second stack part together define an aperture that surrounds the shaft axis.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 18, 2014
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jeffrey C. Hessenberger, Michael Kolden, Brandon Verbrugge, Dennis J. Cerney, Alan Yeadon
  • Patent number: 8674579
    Abstract: The present invention relates to a stator core of a motor for a washing machine that is formed by connecting a plurality of arc-shaped core pieces to each other, each of the core pieces being formed by stacking core piece steel plates on top of each other and by bending the stacked core piece steel plates in such a manner that core piece teeth are disposed outward in the radial direction of a core piece yoke and the core piece yoke has the same curvature as a yoke of a stator core, the core piece yoke on each core piece steel plate having a plurality of incised portions for bending formed partially incised thereon between the respective neighboring core piece teeth on the opposite side to the side on which the core piece teeth are formed.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: March 18, 2014
    Assignee: New Motech Co., Ltd.
    Inventors: Jung Cheol Jang, Gyeong Sik Yang
  • Publication number: 20130328437
    Abstract: A stator core with a high stiffness is disclosed for a gearless drive of a tube mill, the stator core, together with a stator frame, forming a stator for a gearless drive for a tube mill, and the stator core being assembled from stator core pieces. The stator core pieces can be connected to one another in the direction of rotation of the tube mill, independently of the stator frame.
    Type: Application
    Filed: August 12, 2013
    Publication date: December 12, 2013
    Applicant: ABB SCHWEIZ AG
    Inventors: Axel FUERST, Christian Horstmann
  • Publication number: 20130320801
    Abstract: A split core of the invention is formed from a plurality of magnetic steel sheets that are stacked in a thickness direction and joined together by crimping, and that when provided in plurality, forms a stator core by being arranged in a circle. This split core includes a yoke that extends in a circumferential direction; a tooth that extends radially inward from an inner peripheral side end portion of the yoke; and an abutting portion that is formed on a joining surface of the yoke that joins with a yoke of another adjacent split core. A radial crimping portion that is longer in a radial direction and is positioned to an outer peripheral side of a maximum outer radius of the abutting portion, and that is crimped to a crimping portion of another magnetic steel sheet, is provided on each of the magnetic steel sheets.
    Type: Application
    Filed: February 13, 2012
    Publication date: December 5, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira Takasaki, Hiroyuki Ikuta
  • Patent number: 8581468
    Abstract: A stator includes an annular stator core that is comprised of a plurality of stator core segments, an outer ring that is fitted on the radially outer surfaces of the stator core segments so as to fasten them together, and a stator coil mounted on the stator core. Each of the stator core segments is formed of a plurality of stator core sheets that are laminated in the axial direction of the stator core. Each of the stator core sheets has a reinforcement portion that includes a recess formed in one of the major surfaces of the stator core sheet and a protrusion formed on the other major surface. The stator core sheets are laminated so that for each adjoining pair of the stator core sheets, the protrusion of one of the stator core sheets is fitted in the recess of the other stator core sheet.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: November 12, 2013
    Assignee: Denso Corporation
    Inventors: Yuichi Kudose, Yusuke Hara, Takashi Hoshiyama
  • Patent number: 8575815
    Abstract: A stator core including at least two or more stator core-continuous bodies each formed by coupling at least two or more unit cores to each other, each unit core consisting of a tooth portion having a coupling slot and a coupling projection formed along both ends thereof and connected to adjacent unit core by means of a connection portion formed at each of both end portions of the tooth portion, wherein the at least two or more stator core-continuous bodies are fitting-connected to each other by means of the coupling slots formed at one side ends thereof and the coupling projections formed at the other side ends thereof to form the stator core having a round shape.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: November 5, 2013
    Assignee: New Motech Co., Ltd.
    Inventors: Jeong Cheol Jang, Kyoung Joo Lee, Wang Gyu Jeong
  • Patent number: 8567043
    Abstract: A stator or rotor of an electric motor or generator comprises a core formed of ferromagnetic material having a plurality of teeth arranged circumferentially about an axis. In one aspect of the invention, at least one retaining member connects the end portions of at least two of the teeth to each other in a manner inhibiting relative movement between said tooth end portions. By inhibiting relative movement between said tooth end portions, vibration is reduced. Vibration can also be reduced by welding interior surfaces of a core to each other. Reducing the vibration reduces the noise emissions of the rotor or stator during operation.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: October 29, 2013
    Assignee: Nidec Motor Corporation
    Inventors: Gary E. Horst, Daniel E. Bailey, Daniel E. Hilton, Gregory M. Levine, L. Ranney Dohogne
  • Publication number: 20130270960
    Abstract: An electric machine stationary assembly is described. The stationary assembly includes a plurality of stacked laminations each comprising a first end and a second end. The stationary assembly also includes a mechanically deformable first fastening feature positioned at the first end of each lamination. The stationary assembly also includes a second fastening feature positioned at the second end of each lamination and configured to cooperate with the first fastening feature to couple the first end to the second end.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 17, 2013
    Applicant: RBC Manufacturing Corporation
    Inventors: Jason Jon Kreidler, William J. Conway, Wesley K. Anderson
  • Publication number: 20130264905
    Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of laminated materials, for example laminated materials configured with cuts and/or segmentations. Segmentations may also assist with manufacturability, mechanical retention of components, and the like.
    Type: Application
    Filed: March 12, 2013
    Publication date: October 10, 2013
    Applicant: Electric Torque Machines, Inc.
    Inventors: David G. Calley, Daniel S. Cole, John M. Dyer, Thomas F. Janecek, Tyler K. Williams
  • Patent number: 8552612
    Abstract: A stator core 10 and its manufacturing method, the stator core 10 including laminated stator core sheets 17, each of the stator core sheets 17 punched out from a magnetic metal sheet 32, a central portion of the magnetic metal sheet 32 previously punched out to form a rotor core sheet 36, the stator core 10 including a thin section 24 formed in a magnetic pole piece 19 of each of the stator core sheets 17, the thin section 24 formed by pressing both sides of the magnetic pole piece 19 in a thickness direction and radially-inwardly elongating the magnetic pole piece 19. The present invention prevents the magnetic pole piece 19 from being curved and improves interlocking accuracies and dimensional accuracies in blanking the rotor core sheet 36 and the start core sheet 17 from one magnetic metal sheet 32.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: October 8, 2013
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Akihiro Hashimoto, Yusuke Hasuo
  • Publication number: 20130249345
    Abstract: A rotor assembly is provided. The assembly includes a hub and a rotor core having a first rotor lamination positioned at least partially around the hub. The first rotor lamination is at least partially defined by a first segment and a second segment that are configured to connect or interlock. The first segment includes a projection extending from a first body. The projection is configured to engage with a corresponding notch in the second segment in order to connect the first segment to the second segment. At least one first mounting tab extends from the first body and is configured to engage with a corresponding first groove on an outer periphery of the hub in order to connect the first segment to the hub.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Edward L. Kaiser, Peter Bostwick, Pankaj Mithal
  • Publication number: 20130200746
    Abstract: A stator back-iron or rotor back-iron of an electric motor, for receiving coil windings comprises a support (2) with a plurality of teeth (3) radially distributed about the support. The teeth are arranged to receive wire windings and are integrally formed with the support. The teeth and support are formed of laminations. The support further comprises a plurality of engagement means (5) formed between the teeth arranged to receive additional teeth (6) having wire windings mounted thereon. Preferably the engagement means are provided between adjacent teeth. The support and integral teeth provide a rigid structure while the spacing provided by using additional teeth makes it easier to wind coils.
    Type: Application
    Filed: November 26, 2010
    Publication date: August 8, 2013
    Applicant: PROTEAN ELECTRIC LIMITED
    Inventors: John P. Foulsham, Rupert Paul Kirby
  • Publication number: 20130187514
    Abstract: A stator core comprises a circumferentially deformable part formed on a radially outer peripheral side of a yoke; circumferentially facing divided parts formed on a radially inner peripheral side of the yoke, each having a dividing line that is oriented in a radial direction and reaches a portion between teeth and divided surfaces that face each other without a gap; and radially facing divided parts formed at the center between the radially inner and outer sides of the yoke along the circumferential direction at the predetermined interval, and each having divided surfaces that face each other in the radial direction, and being continuous at one ends with the respective circumferentially facing divided parts. The circumferentially facing divided parts each have a compressive stress being smaller than a compressive stress acting on the circumferentially deformable part or being zero.
    Type: Application
    Filed: September 27, 2011
    Publication date: July 25, 2013
    Applicant: NHK SPRING CO., LTD.
    Inventors: Kazuo Iwata, Yoshinobu Mino
  • 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: 20130183179
    Abstract: A motor may comprise a rotor and a stator. A first core of the stator may comprise three pieces of first partial cores and a first connecting portion connecting the first partial cores adjacent to one another. The first partial core may comprise a tooth part disposed at a front edge portion and a contacting part disposed at a rear edge portion. The contacting part may contact the adjacent first partial core. The first core may be formed such that a state of the contacting parts changes from a separated state in which the contacting parts are separated from each other to a contacting state in which the contacting parts of the adjacent first partial cores are contacting each other.
    Type: Application
    Filed: January 14, 2013
    Publication date: July 18, 2013
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Aisan Kogyo Kabushiki Kaisha
  • Patent number: 8487502
    Abstract: A stator core includes a first lamination and a second lamination. The first lamination is formed from a plurality of first segments and has a plurality of first mounting ears. The second lamination is formed from a plurality of second segments and has a plurality of second mounting ears. The first lamination and the second lamination are aligned with a common axis and are rotated about the common axis such that the first lamination is not aligned with the second lamination.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: July 16, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Edward L. Kaiser, Peter J. Savagian, Peter Bostwick
  • Publication number: 20130169104
    Abstract: The present invention relates to a stator core of a motor for a washing machine that is formed by connecting a plurality of arc-shaped core pieces to each other, each of the core pieces being formed by stacking core piece steel plates on top of each other and by bending the stacked core piece steel plates in such a manner that core piece teeth are disposed outward in the radial direction of a core piece yoke and the core piece yoke has the same curvature as a yoke of a stator core, the core piece yoke on each core piece steel plate having a plurality of incised portions for bending formed partially incised thereon between the respective neighboring core piece teeth on the opposite side to the side on which the core piece teeth are formed.
    Type: Application
    Filed: February 3, 2012
    Publication date: July 4, 2013
    Inventors: Jung Cheol JANG, Gyeong Sik Yang
  • Publication number: 20130162099
    Abstract: A rotor of a rotating electrical machine includes a rotor core which includes an annular core plate formed by coupling a plurality of arc shaped core plate pieces. Multiple core plates are stacked together. A circumferential position of a seam formed by coupling the core plate pieces is alternately displaced for every predetermined number of core plates in a stacking direction of the core plates. A bar-shaped member is inserted in a plurality of through holes formed in the respective core plate pieces and aligned in the stacking direction. Both side surfaces of the rotor core in the stacking direction are interposed between end plates, the end plates contact the core plates, and the end plates do not contact the bar-shaped member at least on a radially outside of the bar-shaped member, which is a side in a direction of a centrifugal force that acts on the bar-shaped member.
    Type: Application
    Filed: November 7, 2012
    Publication date: June 27, 2013
    Inventors: Yasuo YAMAGUCHI, Hiroaki SANJI
  • Patent number: 8466596
    Abstract: A laminated core 10 improves material yield and prevents cracks or breakages of core pieces by relaxing stress on connecting portions 13. A connected core segment 14 to be the laminated core 10 includes: a V-shaped cutout 17 located radially inward from the connecting portion 13, the cutout 17 opening in a radially inward direction with an opening angle of 360°/n given that n is a number of core segments 19; a slit 18 located radially outward from the connecting portion 13, the slit 18 dividing adjacent segment yokes 12 located radially outward from the connecting portion; a first through-hole 20 having a circular arc formed in a radially outward end of the cutout 17 in contact with the connecting portion 13; and a second through-hole 21 having a circular arc formed in a radially inward end of the slit 18 in contact with the connecting portion 13.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: June 18, 2013
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Kiyohisa Maki, Yusuke Hasuo, Mei Arazoe
  • Patent number: 8466594
    Abstract: A motor stator includes a body member having multiple wire-winding grooves that is formed of a stack of silicon steel plates and defines axially a middle section and two end sections, the wire-dinging grooves in the end sections being greater than in the middle section, two wire racks each having foot tubes respectively inserted into the end sections of the body member in the wire-winding grooves beyond the middle section, the foot tubes having an inner diameter not less than the part of the wire-winding grooves corresponding to the middle section, and insulation sheets having a length greater than the height of the middle section of the body member and being respectively set in the wire-winding grooves and the corresponding foot tubes.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: June 18, 2013
    Assignee: Lidashi Industry Co., Ltd.
    Inventor: Yung-Yu Lin