Securing Means Patents (Class 310/216.058)
  • Patent number: 11411447
    Abstract: In an axial gap motor, a rotor is rotatably supported and a stator is placed to face the rotor with a gap in a first direction parallel to a shaft of the rotation. A core of the stator is formed by stacking of thin plates that can be penetrated by magnetic flux in a second direction orthogonal to the first direction. A plurality of thus formed cores are fixed to a yoke. Here, each of the plurality of cores includes a plurality of fitting portions in positions at a side facing the yoke, and the yoke includes a plurality of attachment portions corresponding to the plurality of fitting portions of the core in positions in which each core is fixed.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: August 9, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Hidenobu Maruyama
  • Patent number: 10833541
    Abstract: There is provided a stator and a method of making the same. For example, there is provided a stator that includes a single piece yoke and a set of teeth mounted on an inner surface of the single piece yoke. Each tooth is pre-wound with a coil and includes a tail portion configured to secure the tooth on the inner surface. Furthermore, at least two teeth of the set of teeth are mounted on the single piece yoke at a slot opening distance of less than about 35%.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: November 10, 2020
    Assignee: UNISON INDUSTRIES, INC.
    Inventors: Daniel Michael Saban, Charles Michael Stephens
  • Patent number: 10637311
    Abstract: A rotor of the present invention includes: a tube-shaped rotor core which is formed by stacking disc-shaped electromagnetic steel plates in layers, which is fixed to a rotary axis and which includes a plurality of through holes that are spaced in a circumferential direction of the rotor core and that penetrate along an axis direction of the rotary axis; and tie rods which are respectively press-fitted into the through holes, where the tie rods are formed with a plurality of rod-shaped members which are arranged in series along the axis direction, and there is no possibility that the positions of slits in the axis direction between the rod-shaped members adjacent in the axis direction coincide with each other in all the tie rods.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: April 28, 2020
    Assignee: FANUC CORPORATION
    Inventor: Yuuki Ogawa
  • Patent number: 10116182
    Abstract: An electric motor storing device for a hybrid vehicle, the hybrid vehicle including an electric motor, the electric motor including a rotor shaft and an inner circumferential side rotational shaft disposed on an inner circumferential side of the rotor shaft in a manner to penetrate said rotor shaft, and a case configured to store the electric motor, the electric motor storing device includes: a support member for rotatably supporting the inner circumferential side rotational shaft and the rotor shaft; and an insulating section for insulating between the support member and the case.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: October 30, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.
    Inventors: Motoki Takeno, Takuya Kodama, Koki Kawamoto, Hiroaki Kiyokami, Ryoji Isarai
  • Patent number: 9819242
    Abstract: A rotor of a wound rotor synchronous motor is manufactured by forming a rotor core using a plurality of core blocks, and fitting bobbins with a coil wound onto the core blocks. In particular, the core blocks are connected such that tops of the bobbins extend from bobbin bodies and are connected with tops of other bobbins fitted on the adjacent core blocks. Additionally, a molding material may be injected into spaces between the core blocks.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: November 14, 2017
    Assignee: Hyundai Motor Company
    Inventors: Kyoungbum Kim, Sanghoon Moon, Hyoungjun Cho, Jung Shik Kim
  • Patent number: 8963667
    Abstract: Packet of plates provided with fixing means, characterized in that at least some of the plates have a cut-out to form a housing receiving an insert provided with fixing means and having a fixing axis, the housing having at least one wall cooperating with an exterior surface of the insert to retain the insert along the fixing axis. Method of manufacturing such a packet.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 24, 2015
    Assignee: R. Bourgeois
    Inventor: Raymond Nicolas Bourgeois
  • Patent number: 8860280
    Abstract: A rotor includes a rotor core comprised of steel sheets that are laminated in the axial direction of the rotor core and a rotating component configured to rotate together with the rotor core. Each of the steel sheets has a positioning portion for circumferentially positioning the steel sheet with respect to the rotating component and is formed of a rolled steel material. For each of the steel sheets, the direction of rolling of the steel sheet is circumferentially offset from both imaginary lines X and Y by predetermined angles. Each of the steel sheets is shaped so that the circumferential position of the positioning portion thereof remains unchanged when the steel sheet is front-back inverted about the imaginary line X. When viewed along the axial direction, at least one of the steel sheets is front-back inverted with respect to and thus forms a mirror image of the other steel sheets.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: October 14, 2014
    Assignee: Denso Corporation
    Inventors: Yuuichirou Itou, Masahiro Seguchi, Yuki Takahashi, Hideaki Suzuki
  • Patent number: 8836194
    Abstract: A motor including a rotor and a stator that supports and rotates the rotor is disclosed. In accordance with an embodiment of the present invention, the motor includes a magnetic member, which is installed in the rotor such that the magnetic member faces the stator, and a stator magnetic body, which is a part of the stator and has a part corresponding to the magnetic member formed asymmetrically therein. In this way, the motor can prevent a whirling effect by installing the magnetic member, which forms a preload, even the motor is thinner.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: September 16, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Viatcheslav Smirnov, Ho-Jun Yoo
  • 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
  • Publication number: 20140217837
    Abstract: A stator for an electric motor or generator comprising a circumferential support having a plurality of protrusions circumferentially distributed about the support; and a plurality of teeth arranged to receive coil windings, wherein each tooth includes a recess with interlocking means formed within the recess for engaging with a protrusion mounted on the circumferential support in a radial direction.
    Type: Application
    Filed: February 3, 2011
    Publication date: August 7, 2014
    Applicant: PROTEAN ELECTRIC
    Inventor: Esad Jaganjac
  • Publication number: 20140197715
    Abstract: An improved configuration for an electric motor has an inner rotor and an outer stator wherein each stator coil is arranged radially outwardly of its respective stator pole and configured to create a magnetic flux path forming a closed magnetic circuit that flows in directions parallel to the longitudinal axis of the motor, rather than circumferentially about the longitudinal axis of the motor. The magnetic flux created by the stator coil is directed from the stator pole, across the air gap to a corresponding rotor pole, and back to the stator pole to form a closed magnetic circuit path. All stator poles are therefore magnetically isolated from each other.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Inventor: ROOPNARINE (one name)
  • Patent number: 8736135
    Abstract: Teeth are arranged annularly around a rotation axis. The yoke has through holes. The through holes open in a radial direction around the rotation axis and in an axial direction along the rotation axis. The teeth are inserted through the through holes. A metal plate is arranged to face the yoke in the axial direction. A reinforcing plate is fixed to the teeth.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: May 27, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Yoshinari Asano, Nobuyuki Kifuji, Tomonori Kikuno, Shin Nakamasu, Ryuuji Yasumoto
  • Publication number: 20140125188
    Abstract: A permanent magnet motor, generator or the like that is constructed with a concentrated winding using a separate tooth. This tooth is preloaded in such a way to achieve high structural rigidity and good magnetic performance.
    Type: Application
    Filed: November 6, 2012
    Publication date: May 8, 2014
    Applicant: LC Drives Corp.
    Inventors: Russel Hugh Marvin, Thomas R. Johnson
  • Publication number: 20140117806
    Abstract: Embodiments of the invention relate to arrangements for connecting together elements of an electric motor or generator such as a rotor or stator. The rotor (607) or the stator (601) may each include a first component (605/610) that has a common circumference with a corresponding second component (602/608). In order to connect the first and second components together the first component has one or more recesses or grooves (7/47) distributed around the circumference and the corresponding second component has one or more resiliently deformable protrusions (606/611). The resiliently deformable protrusions are arranged to protrude into the one or more recesses so as to press against side walls of the recesses and resist relative rotation of the first and second components.
    Type: Application
    Filed: August 4, 2011
    Publication date: May 1, 2014
    Applicant: PROTEAN ELECTRIC LIMITED
    Inventor: Esad Jaganjac
  • Patent number: 8614533
    Abstract: The present invention relates to an electric commutator motor (1) that comprises a stator (2) and a rotor core (3), wherein the magnetic flux transmittance between the rotor (3)-stator (2) is improved and the noise level is reduced by securing a ferromagnetic rotor sleeve (5) on the outer circumference press-fittingly. The sleeve is made of a ring shaped ferromagnetic laminations.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: December 24, 2013
    Inventor: Aydin Bahadir
  • 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
  • Patent number: 8456057
    Abstract: A laminated stator core 10, formed by laminating stator core sheets 17, each of the stator core sheets 17 punched out from a magnetic metal sheet 32 so as to have a common axis with a rotor core sheet 36 which punched out from the magnetic metal sheet 32 before the stator core sheet 17 is punched out; the stator core sheet 17 including a thin section 24 in a magnetic pole shaft piece 20; the thin section 24 formed by pressing a part or a whole of a magnetic pole shaft piece 20 in a thickness direction, and elongating the same in a radially inward direction; and further the thin section 24 having a thickness within 50-95% of that of the magnetic metal sheet 32 and a radial length within 30-100% of that of the magnetic pole shaft piece 20. This enables a magnetic pole piece 19 to be elongated to form the thin section 24 without adverse effect on magnetic characteristics thereof, and improves caulking accuracy and dimensional accuracy for blanking both of the core sheets 17, 36 from one magnetic metal sheet 32.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: June 4, 2013
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Yusuke Hasuo, Kazunori Ouchi
  • Patent number: 8319380
    Abstract: Electrodymamic machine rotating mass, including for example induction motor rotors, stiffness tuning methods include selective orientation and compression of modular tie rod assemblies into through bores formed in the rotor lamination core outboard of the rotor shaft during motor manufacture, repair or refurbishment. Stiffness tuning enables a motor manufacturer to tune a rotor's rotordynamic stability, and hence the assembled motor's critical vibration speed. Electrodynamic machine rotating mass tuning can be adjusted in response to machine physical design, operational application and manufacturing variation attributes that impact the assembled machine's critical vibration frequency. Thus the present invention offers a systematic, holistic approach to motor vibration refinement through use of a simple kit of modular tie rod assemblies oriented and tightened in a selected array. Rotor stiffness tuning can be tested virtually on computer work stations.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: November 27, 2012
    Assignee: Siemens Industry, Inc.
    Inventor: Sumit Singhal
  • 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: 8138650
    Abstract: A rotor core of a rotating electrical machine formed by stacking a plurality of blanks blanked from a steel sheet, the blank having a yoke, a magnetic pole portion confronting the yoke, and a magnet insertion hole positioned between the yoke and the magnetic pole portion, the magnetic pole portion having a projection projecting circumferentially at two circumferential sides thereof.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: March 20, 2012
    Assignees: Toshiba Ha Products Co., Ltd., Toshiba Consumer Marketing Corporation, Mitsui High-Tec Inc.
    Inventors: Tsuyoshi Shiga, Noboru Shibata
  • Patent number: 8127428
    Abstract: A process for manufacturing an outer stator for an electric motor whereby the stator comprises stator poles surrounded by coils. A laminar body of ferromagnetic material is prepared, with elongated form and provided with laminar protrusions. A coil of conductive material is then inserted around each of the laminar protrusions. The terminal zones of the laminar protrusions are then cut or separated and deformed in order to assume an outwardly curved form. Then, the laminar body is closed such that the laminar protrusions are in an internal position and adapted to serve as stator poles.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: March 6, 2012
    Assignee: Askoll Holding S.r.l.
    Inventor: Elio Marioni
  • Patent number: 8125113
    Abstract: A wound core assembly for an electrical machine comprising a stack of laminations defining a core having a plurality of poles, the wound core assembly further comprising at least one slot wedge, wherein the slot wedge comprises a first portion arranged between adjacent poles and at least one second portion protruding from the first portion and abutting an end face of the core in the region of at least one of the poles. The at least one second portion may apply axial pressure to the end face to reduce the tendency of the laminations to splay axially outwards.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: February 28, 2012
    Assignee: Nidec SR Drives Ltd.
    Inventors: Michael James Turner, Simon David Gibson
  • Patent number: 8015691
    Abstract: A laminated core block includes a plurality of core members made of magnetic sheets stacked one on top of another, the plurality of core members including first and second core members which adjoin in a laminating direction, and a thermoplastic resin strand placed between the first and second core members. The thermoplastic resin strand is arranged to pass along one side surface of the first core member, between the first and second core members and along a side surface of the second core member on a side opposite to the aforementioned side surface of the first core member in this order. The first and second core members are bonded to each other by melting and curing the thermoplastic resin strand.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: September 13, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nobuaki Miyake, Yuji Nakahara, Masahiro Yuya, Yukinobu Karata, Akira Hashimoto
  • Patent number: 8008832
    Abstract: An electric motor, includes a stator, which is composed at least of stamp-packed tooth segments, the tooth segments being able to be slid together radially in the manufacture and being able to be held together by retaining elements slid on axially.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: August 30, 2011
    Assignee: Sew-Eurodrive GmbH & Co. KG
    Inventor: Stephan Rhode
  • Patent number: 7960890
    Abstract: A laminated core block includes a plurality of core members made of magnetic sheets stacked one on top of another, the plurality of core members including first and second core members which adjoin in a laminating direction, and a thermoplastic resin strand placed between the first and second core members. The thermoplastic resin strand is arranged to pass along one side surface of the first core member, between the first and second core members and along a side surface of the second core member on a side opposite to the aforementioned side surface of the first core member in this order. The first and second core members are bonded to each other by melting and curing the thermoplastic resin strand.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: June 14, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nobuaki Miyake, Yuji Nakahara, Masahiro Yuya, Yukinobu Karata, Akira Hashimoto
  • Publication number: 20110127859
    Abstract: The invention relates to a permanent-magnetic rotor (2) for an electric motor, preferably for an internal rotor motor, that comprises a laminated core (3) consisting of several rotor sheets (4, 41, 5) that are stacked in the axial direction. Permanent magnets (8) are arranged in receiving pockets (7) formed by recesses (6) of the rotor sheets, the laminated core (3) being composed of at least two differently shaped types of rotor sheets (4, 4?, 5). Several rotor sheets (4, 41) of a first type of rotor sheet are provided as retaining sheets (4, 41) that respectively comprise a (central) yoke lamination section (13) that is connected or can be connected to the rotor shaft and respectively one or more (external) pole shoe sections (12) that are connected to the yoke lamination section (13) by one or more connecting bars (9, 9?, 10) or bar sections, and several rotor sheets (5) of a second type of rotor sheet are provided as intermediate sheets (5) without connecting bars.
    Type: Application
    Filed: July 10, 2009
    Publication date: June 2, 2011
    Applicant: Hanning Electro-Werke GmbH & Co. KG
    Inventors: Wolfgang Amrhein, Ralf de le Haye, Siegfried Silber
  • Patent number: 7944111
    Abstract: A stator core is formed by arranging divided cores (20) in a circumference direction in cylindrical shape. On an upper end surface (60) of a core back (50) of the divided core, holes (62, 64) are made. Then, on the upper end surface, a reinforcing ring (40) having through holes (66, 68) is arranged, and is connected with rivets (70, 72). Thus, stress is transmitted not only through a side surface (58) but also through the reinforcing ring (40), between the adjacent divided cores. Thus, strength of the stator using a powder magnetic core is ensured and a space is saved.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: May 17, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Electric Industries, Ltd.
    Inventors: Yasuhiro Endo, Kazutaka Tatematsu, Yutaka Komatsu
  • Patent number: 7926164
    Abstract: A method for manufacturing a stator core (20) for an electric machine, in which a plurality of strip-shaped laminations (21) are first stacked to form an essentially block-shaped lamellas packet (40) that is then shaped into an annular form by means of roller bending in one of the subsequent steps so that the outer teeth are provided on the outer circumference of the lamination packets and has an axial direction (a) that corresponds to a cylinder axis (z), the annular form having axial end surfaces (46), wherein in another of the subsequent steps, the annular lamination packet (40) is plastically deformed in the axial direction (a) only on the outer teeth (70) of the axial end surfaces (46).
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: April 19, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Eberhard Rau, Thomas Berger, Martin Henne, Klaus Pflueger
  • Publication number: 20110084569
    Abstract: An armature core includes a back yoke and teeth. The teeth include a plurality of magnetic plates laminated along a lamination direction. The back yoke includes holes through which the teeth are inserted. The holes penetrate through a pair of surfaces of the back yoke. The back yoke and the plurality of magnetic plates are welded to each other at a point at which an edge of a boundary between the adjacent magnetic plates and a surface forming the hole are close to each other and any one of the pair of surfaces is exposed.
    Type: Application
    Filed: June 5, 2009
    Publication date: April 14, 2011
    Inventors: Yoshinari Asano, Nobuyuki Kifuji, Tomonori Kikuno
  • Patent number: 7923887
    Abstract: Disclosed herein is a brushless motor that is simply constructed based on a vernier type motor to achieve high torque without the increase in size and complication thereof. The brushless motor includes a rotor having magnetized surfaces alternately magnetized as N and S poles and a stator having salient poles. The salient poles have tip end surfaces opposite to the magnetized surfaces in the radial direction. Grooves and protrusions are alternately formed at the tip end surfaces of the salient poles in the rotational direction. The grooves and the protrusions extend in the axial direction and have a width in the rotational direction approximately equal to that of the N pole or the S pole. Magnetic bodies are disposed in gaps defined between the grooves and the magnetized surfaces in a non-contact fashion. A magnetic connection member is spaced apart from the stator to interconnect the magnetic bodies.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 12, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Yukinori Nakagawa
  • Patent number: 7919898
    Abstract: A rotor core assembly for an electric motor includes a stack of laminations and first and second end plates disposed at opposite ends of the stack of laminations. A plurality of concentric fastener holes extend through the laminations and the end plates for receiving stainless steel pins. Each pin has a head against one of the end plates, and each pin has spaced apart grooves thereon extending from the other end plate. A stainless steel collar engages each of the pins and contacts one of the end plates. Each collar has a deformed portion in at least one of the grooves of the pin.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: April 5, 2011
    Assignee: Nidec Motor Corporation
    Inventors: Weirong Wang, Thomas E. Kirkley, Jr.
  • Publication number: 20110074242
    Abstract: Electrodymamic machine rotating mass, including for example induction motor rotors, stiffness tuning methods include selective orientation and compression of modular tie rod assemblies into through bores formed in the rotor lamination core outboard of the rotor shaft during motor manufacture, repair or refurbishment. Stiffness tuning enables a motor manufacturer to tune a rotor's rotordynamic stability, and hence the assembled motor's critical vibration speed. Electrodynamic machine rotating mass tuning can be adjusted in response to machine physical design, operational application and manufacturing variation attributes that impact the assembled machine's critical vibration frequency. Thus the present invention offers a systematic, holistic approach to motor vibration refinement through use of a simple kit of modular tie rod assemblies oriented and tightened in a selected array. Rotor stiffness tuning can be tested virtually on computer work stations.
    Type: Application
    Filed: September 25, 2009
    Publication date: March 31, 2011
    Applicant: Siemens Energy & Automation, Inc.
    Inventor: Sumit Singhal
  • Publication number: 20110037335
    Abstract: The present invention relates to an axial motor, and more specifically, to an axial motor which has a simple structure and is easily assembled by inserting and holding core teeth in core teeth insertion holes circularly arranged on a yoke. The axial motor according to the present invention includes: a stator having core teeth which are insulated by insulators, arranged in a ring-shaped pattern, and have a coil wound thereon; and a rotor having magnets which are arranged in a ring-shaped pattern to face the ends of the core teeth in an axial direction and are supported by the rotor axis at the center of the rotor to rotate relatively with respect to the stator.
    Type: Application
    Filed: October 26, 2010
    Publication date: February 17, 2011
    Applicant: NEW MOTECH CO., LTD.
    Inventors: Jeong Cheol JANG, Ji Min LEE
  • Patent number: 7847458
    Abstract: The motor includes a cylindrical rotor core, a plurality of magnets axially penetrated in the rotor core, a pair of separation-preventing plates installed at both ends of the rotor core, and at least one fixing member to fix the separation-preventing plates to the rotor core. The fixing member includes a rod portion extending in an axial direction of the rotor core to be disposed on an outer circumferential surface of the rotor core, and supporting portions bent from both ends of the rod portion and used to support the separation-preventing plates. The separation-preventing plates can be fixed to the rotor core by the fixing member disposed on the outer circumferential surface of the rotor core. The fixing member has no risk of hindering the flow of magnetic flux generated from the magnets, resulting in an improvement in the performance of the motor.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: December 7, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong Jung Kim, Sang Uk Park, Hyung Chul Lee
  • Patent number: 7821177
    Abstract: A laminated core includes a laminated body, clamping plates and holding members. The laminated body includes a plurality of amorphous alloy plates, which are stacked one after another in a stacking direction such that each adjacent two of the plurality of amorphous alloy plates directly contact with each other. The clamping plates contact opposed end surfaces, respectively, of the laminated body in the stacking direction. A thickness of each of the first and second clamping plates in the stacking direction is larger than that of each of the plurality of amorphous alloy plates. Each holding member contacts with the clamping plates and maintains a predetermined space between the clamping plates while the laminated body is clamped between the clamping plates.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: October 26, 2010
    Assignee: Nippon Soken, Inc.
    Inventors: Sadahisa Onimaru, Hirofumi Kinjou, Daisuke Miyata, Katsuhiko Oka
  • Publication number: 20100225194
    Abstract: The present invention relates to an electric commutator motor (1) that comprises a stator (2) and a rotor core (3), wherein the magnetic flux transmittance between the rotor (3)-stator (2) is improved and the noise level is reduced by securing a ferromagnetic rotor sleeve (5) on the outer circumference press-fittingly. The sleeve is made of a ring shaped ferromagnetic laminations.
    Type: Application
    Filed: October 28, 2008
    Publication date: September 9, 2010
    Inventor: Aydin Bahadir
  • Patent number: 7737599
    Abstract: A securing structure for a stator includes the stator having a stator core, and a housing having an opening portion containing the stator core, and the housing includes a portion A where the clearance between the inner circumferential surface of the opening portion and the stator core is relatively smaller and the inner diameter of the opening portion is constant, and a portion B located adjacent to the portion A in the axial direction of the stator core where the clearance between the inner circumferential surface of the opening portion and the stator core is relatively larger.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: June 15, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroyuki Hattori
  • Patent number: 7737598
    Abstract: A stator configured to rotate a rotor with a number of magnetic poles includes a yoke that includes a back portion and a first type and first quantity of integral teeth, and a second type and second quantity of insertable teeth coupled to the back portion. At least two coils are wound with a continuous electric wire. Each of the coils is placed around two different integral teeth to define a first winding section. At least two other coils are wound with a continuous electric wire. The other coils are placed around two different insertable teeth to define a second winding section.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: June 15, 2010
    Assignee: A. O. Smith Corporation
    Inventors: Dan M. Ionel, Stephen J. Dellinger, Alan E. Lesak
  • Patent number: 7723892
    Abstract: A synchronous motor includes multiple coil segments, each of which has an iron core in the form of a core stack that is wound with a coil. The coil segments are characterized in that the coils press fastening elements having at least two legs against two opposite surfaces of the substantially right parallelepiped iron core. In each case, at least one leg of the fastening element abutting against the iron core is pressed against the iron core, and at least one free leg of the fastening element projects away from the iron core. The free legs are fastened to connecting elements that connect multiple coil segments to one another.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: May 25, 2010
    Assignee: Etel S.A.
    Inventors: Vincent Cardon, Jean-Pierre Morel
  • Patent number: 7687964
    Abstract: An electric motor has a field assembly, such as a stator, for a dynamoelectric machine has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated with insulating sleeves or insulating slot liners. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. The stator core pieces are formed prior to being assembled with the field coils. In an aspect of the invention, the pole pieces and return path pieces are separately formed and then assembled together with the field coils, which have also been separately formed.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: March 30, 2010
    Assignee: Black & Decker Inc.
    Inventors: Hung T. Du, Brandon L. Verbrugge, Earl M. Ortt, Michael J. Agnes, Michael A. Zemlock, Robert G. Kusmierski, David J. Smith
  • Publication number: 20100026134
    Abstract: A process for manufacturing an outer stator (11; 111; 211; 311; 411; 511) for an electric motor (13; 113; 213; 313; 413; 513) is described, said stator (11; 111; 211; 311; 411; 511) comprising stator poles (2; 102; 202; 302; 402; 502) surrounded by coils (5; 105; 205; 305; 405; 505), said process including the following steps: preparing a laminar body (1; 101; 201; 301; 401; 501), of ferromagnetic material, with elongated form and provided with laminar protrusions (2; 102; 202; 302; 402; 502); inserting a coil (5; 105; 205; 305; 405; 505) of conductive material around each of said laminar protrusions (2; 102; 202; 302; 402; 502); deforming the terminal zones (7; 107; 207; 307; 407; 507) of said laminar protrusions (2; 102; 202; 302; 402; 502) such that said terminal zones (7; 107; 207; 307; 407; 507) assume a preferably outwardly curved form; and closing said laminar body (1; 101; 201; 301; 401; 501) such that said laminar protrusions (2; 102; 202; 302; 402; 502) are in internal position and adapted to serve
    Type: Application
    Filed: July 16, 2009
    Publication date: February 4, 2010
    Applicant: Askoll Holding S.r.l
    Inventor: Elio Marioni
  • Publication number: 20090195110
    Abstract: A laminated core block includes a plurality of core members made of magnetic sheets stacked one on top of another, the plurality of core members including first and second core members which adjoin in a laminating direction, and a thermoplastic resin strand placed between the first and second core members. The thermoplastic resin strand is arranged to pass along one side surface of the first core member, between the first and second core members and along a side surface of the second core member on a side opposite to the aforementioned side surface of the first core member in this order. The first and second core members are bonded to each other by melting and curing the thermoplastic resin strand.
    Type: Application
    Filed: January 12, 2009
    Publication date: August 6, 2009
    Applicant: Mitsubishi Electric Corporation
    Inventors: Nobuaki MIYAKE, Yuji Nakahara, Masahiro Yuya, Yukinobu Karata, Akira Hashimoto
  • Publication number: 20090189477
    Abstract: A first laminated body includes first and second laminated groups including respective convex parts alternately disposed. A second laminated body includes third and fourth laminated groups including respective concave parts alternately disposed. The convex part of the first laminated group is shaped to not be inserted into the concave part of the third laminated group and to be inserted into the concave part of the fourth laminated group, from a lamination horizontal direction. The convex part of the second laminated group is shaped to be inserted into the concave part of the third laminated group and the concave part of the fourth laminated group, from the lamination horizontal direction. The convex part of the first laminated group is press-inserted in the concave part of the third laminated group, and the convex part of the second laminated group is inserted in the concave part of the fourth laminated group.
    Type: Application
    Filed: May 29, 2007
    Publication date: July 30, 2009
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kazuyuki Yamamoto