Plural Axially Laminated Segments Circumferentially United Patents (Class 310/216.008)
  • Patent number: 10931154
    Abstract: Provided is an axial-gap type motor in which positioning among components composing a yoke-provided core is easy so that manufacturing thereof can be performed accurately and easily, and which exhibits superiority in performance and cost. In the axial-gap type motor, either one of a stator and a rotor includes: a yoke-provided core including an annular back yoke and a plurality of magnetic pole cores projecting from a side surface of the back yoke; and coils. The yoke-provided core is a core-pieces-arrayed body obtained by arraying, in a circumferential direction thereof, core pieces obtained through division for the respective magnetic pole cores. Each core piece includes a magnetic pole core portion and a back yoke portion. Each core piece is a steel plate laminate obtained by stacking a plurality of steel plates in a radial direction.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: February 23, 2021
    Assignee: NTN CORPORATION
    Inventor: Yui Masuda
  • Patent number: 10855123
    Abstract: A rotating electrical machine includes a plurality of core pieces forming a stator core. Each of the core pieces includes contact surfaces on one side end and another side end in a peripheral direction, a tapered protrusion on the contact surface of the one side end, the protrusion including first inclined surfaces outside and inside, and a recess on the contact surface of the other side end, the recess including second inclined surfaces contacting the first inclined surfaces outside and inside to receive the protrusion of adjacent core piece. A cross-sectional shape of the protrusion is a shape such that, inside a circle centered on a first end portion with a distance being a radius between a second end portion located on an opposite side of the first end portion and the first end portion, at least a part of the first inclined surfaces contact the second inclined surfaces.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: December 1, 2020
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo Suzuki, Motomichi Ohto, Kenichi Hirata, Hiroki Takamura, Yosuke Shirozu, Yuta Matsunami
  • Patent number: 10804754
    Abstract: A permanent magnet embedded motor includes a cylindrical stator core disposed on an inner side of a cylindrical frame and configured by stacking a first annular core and a second annular core disposed to be adjacent to the first annular core in an axial direction of the frame, and a rotor disposed on an inner side of the stator core. The second annular core is fixed to the first annular core by using swaging portions formed in the second annular core, and adjacent first yokes are in contact with each other, while adjacent second yokes are separated from each other.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: October 13, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Kazuchika Tsuchida, Sadami Okugawa, Yoshinori Iwanabe
  • Patent number: 10751782
    Abstract: At least one caulking group (13) that includes a plurality of caulking parts (14, 15) with different directions is formed on a plurality of thin plates (10) placed in a stacked state to fix the position of the stacked thin plates (10), and then a preset punching process is performed with respect to the thin plates (10) that have been positioned with pilot holes (12). This makes it possible to perform a high-accuracy punching process when punching the plurality of thin plates (10) placed in a stacked state, since positional deviations between the thin plates (10) are avoided and pilot pins (11) are prevented from deforming the periphery of the pilot holes (12).
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 25, 2020
    Assignee: Mitsui High-tec, Inc.
    Inventors: Akihiro Hashimoto, Tadashi Iida, Masahiro Izumi
  • Patent number: 10658105
    Abstract: A core body of a reactor includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least 3 iron cores coupled to the outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps are formed between one of the at least three iron cores and another iron core adjacent thereto. Further, the reactor includes a temperature detection part arranged in the center of one end surface of the core body.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: May 19, 2020
    Assignee: FANUC CORPORATION
    Inventors: Tomokazu Yoshida, Masatomo Shirouzu, Kenichi Tsukada
  • Patent number: 10432041
    Abstract: A stator includes a winding and a plurality of split core parts arranged annularly in a circumferential direction around an axis line. Each of the plurality of split core parts includes a yoke part, a tooth part, a connection part including a curved surface, and a first insulator provided on an end part of the tooth part. The first insulator includes a first protruding part protruding beyond the curved surface.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: October 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Nigo, Shuichi Kitano, Yasusi Shoji
  • Patent number: 10292303
    Abstract: A cooling unit for cooling the air admitted to the interior of a switchgear cabinet (100), which cooling unit has an inner circuit, through which the air to be cooled is routed from a switchgear cabinet interior, and an outer circuit (3) which is fluidically partitioned from the inner circuit and through which the surrounding air is routed, wherein the inner circuit contains a first heat exchanger and the outer circuit contains a second heat exchanger, between which a coolant is circulating, wherein the heat exchangers have an air flow direction along which the heat exchangers allow air to pass between an air inlet side and an air outlet side, characterized in that at least one of the heat exchangers has a first air guide upstream on the air inlet side, which extends at an angle with 5<?<45° relative to the air inlet side and forms an air duct between itself and the air inlet side, which tapers along a dimension of the air inlet side.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: May 14, 2019
    Assignee: Rittal GmbH & Co. KG
    Inventors: Juan Carlos Cacho Alonso, Bernd Henrichs
  • Patent number: 10291084
    Abstract: A stator including a stator core formed in a ring shape is manufactured as follows; previously preparing an original core body provided with a belt-shaped part in a straight line shape structured of multiple outer peripheral parts and multiple salient pole parts, forming a recessed part on each of outer side faces of first outer peripheral parts disposed on both end sides of the belt-shaped part at a position between the salient pole part connected with the first outer peripheral part and an end part in the longitudinal direction of the belt-shaped part; and a bending step in which the original core body is successively pressed and bent from a center of the belt-shaped part toward both end sides.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: May 14, 2019
    Assignee: NIDEC SANKYO CORPORATION
    Inventors: Shinichi Utsumi, Hiroki Kuratani, Yuji Maruyama, Hideo Shimodaira
  • Patent number: 10110104
    Abstract: A permanent magnet synchronous motor is provided in the present disclosure. The permanent magnet synchronous motor includes a housing as well as a stator and a rotor received in the housing, the stator surrounding the rotor, wherein the stator comprises a core which surrounds the rotor and is annular and a plurality of coils wound on the core, the plurality of coils are disposed at intervals and distributed in an annular array, the core is composed of a plurality of core blocks spliced with each other, the core block comprises a raised part on the outer wall, and grooves matched with the raised parts in shape and used for positioning the raised parts are formed in the inner wall of the housing.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 23, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: LinZhen Li, ZhuMing Chu
  • Patent number: 10033235
    Abstract: A rotor for an electric machine comprises a central core, arms extending radially relative to the core, these arms each comprising two rims extending on either side of the arms, permanent magnets positioned inside housings that are delimited by opposing lateral faces of adjacent arms, an outer face of the core extending between adjacent arms, and the rims of the arms of the rotor. Plates made from a material more flexible than the permanent magnets are positioned between the rims of the arms and the face of the permanent magnet facing away from the axis of the rotor to hold the magnets. The plate having, in the axial direction, a height close to the height of the permanent magnets, the ratio between the width of the plate and that of the magnet being between 0.9 and 1.1, without being equal to 1.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: July 24, 2018
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Lilya Bouarroudj, Mamy Rakotovao, Jean-Claude Matt
  • Patent number: 9116017
    Abstract: Disclosed is a magnetic inductive type position sensor, the position sensor including at least one rotor body coupled to a rotation shaft to rotate in association with rotation of the rotation shaft and having a plurality of protrusively and circumferentially formed wing members, a PCB arranged in opposition to the rotor body, and a guide member connecting each distal end of the wing members to guide each of the wing members to be aligned on the same planar surface.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: August 25, 2015
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Changhwan Lee
  • Patent number: 9059611
    Abstract: A stator core includes at least one bendable strip-shaped core. Each strip-shaped core is formed by stacking a plurality of laminations. Each lamination includes at least two yoke portions and at least two tooth portions. Every two adjacent yoke portions are connected to each other via a bendable portion and have two opposite end surfaces, one of the end surfaces having a groove and the other having a projecting rib. After the bendable portion is bent the projecting rib is engaged in the groove to form an interlock structure such that relative circumferential movement between the adjacent yoke portions is limited.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: June 16, 2015
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Bao Ting Liu, Kui Man Lai, Yong Wang, Xiao Ning Zhu
  • 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: 9000650
    Abstract: The invention relates to a laminated core for electromagnetic applications with at least two segments (2), of which at least one on a side-edge (11), comprises an engagement groove (12) and the other at an opposite side-edge (9) comprises a corresponding engagement projection (10), via which the two segments (2) are connected to one another into a component, wherein the engagement groove (12) comprises an undercut in the form of a widened section (26) distanced to the groove opening, and the engagement projection (10) and the engagement groove (12) are dimensionally matched to one another in a manner such that the engagement projection (10) and/or engagement groove (12) are plastically deformed by way of inserting the engagement projection (10) into the engagement groove (12), so that the engagement projection (10) engages into the widened section (26) of the engagement groove (12), as well as to a method for the manufacture of such a laminated core.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: April 7, 2015
    Assignee: Grundfos a/s
    Inventors: Niels Kristian Bach Andersen, Brian Lundsted Poulsen, Thomas Blad, Kjeld Hellegaard
  • Patent number: 8981615
    Abstract: A wound stator core disclosed is substantially formed from a spirally piled strip. In an embodiment, the strip with a specific length is formed with a first dentition and a second dentition, whereas the first dentition is featured by a first slot-number ratio and is composed of a first side and a plurality of first teeth in a manner that the plural first teeth are arranged as an array on the first side; which is also same to the second dentition while allowing the second slot-number ratio to be equal to the first slot-number ratio. In addition, each first tooth is formed with a first dental part at a free end thereof, while also each second tooth is formed with a second dental part at a free end thereof, and the first dental part of each first tooth is connected to the second dental part of its corresponding second tooth.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: March 17, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Cheng-Hsuan Lin, Wen-Yang Peng, Han-Ping Yang, Jung-Kang Peng
  • 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: 8963395
    Abstract: An annular motor core has a plurality of split core pieces, each of which includes a yoke portion and a tooth. The split core pieces are circumferentially located and arranged in an annular shape such that the yoke portions of the core pieces form an annular shape as a whole and that the distal ends of the teeth of the core pieces face inward or outward each in a radial direction of the core. The core further includes an annular holder, which has joint portions at a plurality of positions in a circumferential direction of the holder. A first end of each of the core pieces is pivotably joined to the corresponding one of the joint portions. Each core piece can be pivoted about the corresponding joint portion relative to the holder such that a second end of the core piece moves in a radial direction of the holder.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: February 24, 2015
    Assignee: Asmo Co., Ltd.
    Inventors: Yukihide Ishino, Akitomo Sasaki, Akihiro Utsumi, Toshiaki Yamada
  • Patent number: 8952590
    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 in connection with powdered metal materials. For example, stacks of laminated materials may be coupled to powdered metal teeth to form portions of a stator in an electrical machine.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: February 10, 2015
    Assignee: Electric Torque Machines Inc
    Inventors: David G. Calley, Daniel S. Cole, John M. Dyer, Thomas F. Janecek, Tyler K. Williams
  • Patent number: 8941282
    Abstract: A stator core (105) including tabbed laminations (100) stacked face-to-face to form a plurality of tabbed lamination modules (107), with each tabbed lamination including a first tab (102) and a second tab (104) extending from a circumferential edge of the lamination. Non-tabbed laminations are also stacked face-to-face to form a plurality of non-tabbed lamination modules (109), each non-tabbed lamination lacking a tab. The tabbed lamination modules are stacked face-to-face in an alternating configuration with non-tabbed lamination modules. The tabs are used to attach the stator core to an inside surface of an electrical generator frame (2), such as by attaching the tabs to frame support rings (4) of the generator frame.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: January 27, 2015
    Assignee: Siemens Energy, Inc.
    Inventors: David T. Allen, Josue Marrero
  • Patent number: 8893375
    Abstract: A method of manufacturing a stator core including stacking a plurality of teeth into a plurality of stacks, said teeth are obtained from a jigsaw pattern of said teeth, said teeth are substantially identical to each other in size, each said tooth is substantially T-shaped via two arms protruding sideways from a leg, said teeth substantially aligning with each other in each said stack; winding said stacks with a plurality of windings; placing said stacks along a perimeter of a polygonal inner surface of a ferromagnetic tube, said inner surface defining an inner space within said tube, each side of said polygonal inner surface corresponding to each said stack and contacting the bases of said legs of each said stack; inserting a shaft into said inner space, the top surfaces of said arms facing said shaft; vacuum encapsulating said inner space in an epoxy resin; removing said shaft.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: November 25, 2014
    Inventor: John Pairaktaridis
  • 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
  • Patent number: 8847461
    Abstract: A stator core includes three split cores, each of the split cores including a core-back portion including an inner surface facing a rotor, a tooth base portion protruding radially inwards from the inner surface of the core-back portion and a pair of tooth overhang portions protruding from both sides of a tip end of the tooth base portion in a circumferential direction. The inner surface of the core-back portion including a pair of orthogonal surface regions extending from both sides of a base end of the tooth base portion in a direction orthogonal or substantially orthogonal to the tooth base portion, the orthogonal surface regions extending radially outwards beyond projection positions of tip ends of the tooth overhang portions when the tooth overhang portions are projected on an imaginary plane including the orthogonal surface regions in parallel or substantially in parallel to the tooth base portion.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: September 30, 2014
    Assignee: Nidec Corporation
    Inventor: Tomoyoshi Sawada
  • Patent number: 8839503
    Abstract: A method for manufacturing a stator for an electric water pump may be used for manufacturing the stator used in the electric water pump. In the electric water pump which includes stator assembly for an electric water pump, wherein the stator assembly including a plurality of core-insulator assemblies generates a magnetic field according to a control signal and a rotor is rotated by the magnetic field generated at the stator assembly to pressurize coolant, the method for manufacturing the stator assembly may include a) stacking a plurality of pieces made of a magnetic material to form a core stack, b) molding an insulator to the core stack, c) coiling a coil to the insulator to form a core-insulator assembly so as to form a magnetic path, and d) connecting the respective core-insulator assembly in an annular shape in sequence to form the stator assembly.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: September 23, 2014
    Assignees: Hyundai Motor Company, Amotech Co., Ltd., Myunghwa Ind. Co. Ltd., Kia Motors Corporation
    Inventors: Jeawoong Yi, Seung Yong Lee, Gyuhwan Kim, Yun Seok Kim, Yong Sun Park, Tae-Sung Oh, Kyung-Hwan Kim, Jong-Hoon Lee, Kwang-Ho Lee
  • Publication number: 20140252912
    Abstract: The invention relates to a rotor of a rotary electric machine, in particular for a flux-switching or wound-rotor machine, a mounting for installing the rotor on a shaft and a plurality of magnetic sectors, preferably in the form of a strip, attached to the mounting.
    Type: Application
    Filed: October 31, 2012
    Publication date: September 11, 2014
    Inventor: Patrick Vohlgemuth
  • 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: 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: 8796894
    Abstract: An electromagnetic actuator includes a body and first and second poles residing apart from the body. The first and second poles communicate magnetic flux across a gap with opposing end facing surfaces of the body. The body, the first pole, and the second pole are magnetically coupled and define an axial magnetic control circuit. A plurality of radial poles reside apart from the body, adjacent a lateral facing surface of the body, and communicate magnetic fluxes with the lateral facing surface. The body and the plurality of radial poles define a plurality of radial magnetic control circuits. The plurality of radial poles communicate magnetic fluxes with the lateral facing surface and at least one of the first pole or the second pole, and the body, the plurality of radial poles, and at least one of the first pole or the second pole define a magnetic bias circuit.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: August 5, 2014
    Assignee: Calnetix Technologies, L.L.C.
    Inventors: Alexei V. Filatov, Lawrence A. Hawkins
  • 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
  • Patent number: 8760028
    Abstract: An electrical rotating machine including a stator core is provided. The stator core is formed of substantially sector-shaped sheet segments die-cut from electrical steel sheets and arranged in a circumferential direction of the stator core to form circular sheets which are stacked in an axial direction of the stator core. In the electrical rotating machine, end regions of the stator core are formed of stacked sheet segments die-cut from non-grain oriented steel sheets, and the other region of the stator core is formed of stacked sheet segments die-cut from grain oriented steel sheets.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: June 24, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Akihito Nakahara, Kazuhiko Takahashi, Kazumasa Ide, Junya Kaneda, Kenichi Hattori, Takashi Watanabe
  • Patent number: 8749108
    Abstract: An electrical machine comprising a rotor, a coil and a stator comprising a lamination stack coupled to a tooth, wherein the electrical machine is at least one of a transversal flux machine is described. The electrical machine may be a transversal flux machine such as a transverse or commutated flux machine. A lamination ring is described comprising a plurality of lamination stacks. A lamination stack may comprise a plurality of trenches configured to retain a plurality of teeth. The tooth may comprise a portion of the switching surface, and a portion of a lamination stack may extend to the surface of the tooth to make up a portion of the switching surface. The electrical machine may be configured with a constant air gap, wherein no more than 15% variability in the distance between the stator switching surface and the rotor switching surface.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: June 10, 2014
    Assignee: Electric Torque Machines, Inc.
    Inventors: John M. Dyer, Thomas F. Janecek, David G. Calley, Daniel S. Cole, Tyler K. Williams
  • Patent number: 8736130
    Abstract: Segmented stator assemblies having a plurality of stator segments and a plurality of end caps are disclosed. According to one example embodiment, a segmented stator assembly includes a plurality of stator segments and a plurality of end caps. Each stator segment has a yoke portion and a tooth portion extending from the yoke portion. Each end cap is positioned over one of the stator segments. Each end cap includes a body portion positioned at least partially over the yoke portion of its associated stator segment. At least one of the body portions includes at least a first post that cooperates with a post of an adjacent end cap to define a first wire management tie-down. The stator assembly further includes a stator wire coupled to the first wire management tie-down. Stator assemblies and end caps having other wire management and routing features are also disclosed.
    Type: Grant
    Filed: February 18, 2013
    Date of Patent: May 27, 2014
    Assignee: Nidec Motor Corporation
    Inventors: Chetan O. Modi, Mark E. Carrier, Jason J. Jurkowski
  • Patent number: 8716915
    Abstract: This invention relates to the construction of stators for use in electric motors. A stator for an electric motor comprises an elongate tubular body defining a central cavity in which a rotor can be located, the body defining a series of axial slots extending parallel to the body axis and a series of electrical conductors extending along the channels to form electrical windings, wherein the body is formed from at least two part-circular segments of substantially the same length, the segments together defining the central cavity.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: May 6, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Maxim Y. Radov, Jacques Orban, John E. Davis
  • Patent number: 8680735
    Abstract: A segment core forms an annular-shaped stator core of a rotary electric machine. The stator core is formed into an annular shape by circumferentially connecting a plurality of segment cores, each segment core having a L shape and includes a yoke portion that forms the outer periphery of the stator core, a tooth portion that extends from the yoke portion to the rotary axis in a radial direction of the stator core, and a steel plate where the yoke portion and the tooth portion are formed wherein one edge of the segment core linearly extends along the yoke portion and the tooth portion in the radial direction of the stator core, the other edge forms a projection in the yoke portion jutting out from the tooth portion in the circumferential direction whereby a segment core is formed into a shape of an L.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: March 25, 2014
    Assignee: Denso Corporation
    Inventor: Ryosuke Utaka
  • Patent number: 8677608
    Abstract: An annular core member having an opening portion located at a position rotated by 90 degrees from a reference position, where the opening portion is oriented in the counterclockwise direction, and an annular core member having the opening portion located at the reference position, where the opening portion is oriented in the clockwise direction, are prepared to form an iron core by a rotary lamination apparatus by rotating the annular core members and by a predetermined angle (90 degrees) such that a first end, in the annular core member, which is at the position rotated by 90 degrees from the reference position and has no rotation uneven part, is circumference-positionally identical in the laminating direction with that of a fourth end, in an annular core member, which is at the reference position and has no rotation uneven part.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: March 25, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Akita, Kimiyasu Furusawa
  • 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
  • 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: 8624462
    Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: January 7, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Akihito Nakahara, Hiroyuki Mikami, Kazumasa Ide, Kazuhiko Takahashi, Kenichi Hattori
  • Publication number: 20130313921
    Abstract: A stator has a plurality of segments connected with connectors to define a core for the stator. Each of the segments comprises a plurality of laminations arranged side by side forming a lamination stack with axially opposite sides. The lamination stack has an end cap abutting an axial side of the lamination stack. The end cap has first and second posts extending axially therefrom. At least one of the posts defining a wire path for wire wound around the stack. Each of the connectors comprises a bridge portion. The bridge portion has openings dimensioned to receive the posts in a manner that the connector is removably attachable to the post of the end cap of a segment and the post of the end cap of an adjacent segment. The connector has an insulator portion projecting from the bridge portion. The insulator portion extends between adjacent segments when the connector is removably attached to adjacent segments.
    Type: Application
    Filed: May 15, 2013
    Publication date: November 28, 2013
    Applicant: Baldor Electric Company
    Inventors: Matthew D. Hoffman, Robert J. Mantey, Douglas H. Sudhoff, Lorenzo Mazza, Bryan L. Paxton, Jeffrey L. Davis, Daniel Scott Dorsch
  • Patent number: 8590137
    Abstract: A stator provided with annular split stator cores, formed by stacking steel plates. Each plate includes a yoke and a stator tooth. The cores include a yoke portion a stator tooth portion. The stator is manufactured by arranging an electromagnetic steel plate between a first die and a second die. The first die has a hole shaped as a steel plate. The second die has a projection inserted into the hole and shaped as a steel plate. The steel plates are formed by the first and the second dies. In a gap between an inner surface of the first die that defines the hole and an outer surface of the projection, a gap at a part that forms the stator tooth portion is larger than a gap at a part that defines a circumferential end surface of the yoke portion located in a circumferential direction of the stator core.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: November 26, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroaki Urano, Eiji Yamada, Kazutaka Tatematsu, Yasuhiro Endo, Yasuaki Tahara, Akihiro Tanaka, Kenji Honda
  • 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: 8575797
    Abstract: A low profile permanent magnet synchronous motor with segment structure. In accordance with this invention, a stator assembly for an electromagnetic motor is provided. The stator assembly has a first stator core and a second stator core that couple windings. Teeth extend outward from each stator core and through the windings to contact the other stator core.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: November 5, 2013
    Assignee: Agency for Science, Technology and Research
    Inventors: Chao Bi, Quan Jiang, Song Lin, Nay Lin Htun Aung, Hla Nu Phyu
  • Patent number: 8569923
    Abstract: A rotating electric machine includes a rotor configured to rotate about an axis. The rotor includes a rotor laminate stack having layered laminations pressed in an axial direction to form a composite, the rotor laminate stack being radially divided into an inner mechanical region and an outer electrical region. A rotor winding is disposed in the electrical region of the rotor laminate stack. A stator concentrically surrounds the rotor. A press plate is configured to press the layered laminations in the axial direction, the press plate being radially divided into a separate inner press plate and a separate outer press plate so as to correspond to the radial division of the rotor laminate stack.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: October 29, 2013
    Assignee: Alstom Renewable Technologies
    Inventors: Alexander Schwery, Serdar Cifyildiz, Hanspeter Walser, Ricardo Okai
  • Publication number: 20130229084
    Abstract: A stator core (105) including tabbed laminations (100) stacked face-to-face to form a plurality of tabbed lamination modules (107), with each tabbed lamination including a first tab (102) and a second tab (104) extending from a circumferential edge of the lamination. Non-tabbed laminations are also stacked face-to-face to form a plurality of non-tabbed lamination modules (109), each non-tabbed lamination lacking a tab. The tabbed lamination modules are stacked face-to-face in an alternating configuration with non-tabbed lamination modules. The tabs are used to attach the stator core to an inside surface of an electrical generator frame (2), such as by attaching the tabs to frame support rings (4) of the generator frame.
    Type: Application
    Filed: March 5, 2012
    Publication date: September 5, 2013
    Inventors: David T. Allen, Josue Marrero
  • Patent number: 8519577
    Abstract: A generator, for example of a wind turbine, includes two end plates and a plurality of stator laminate plates arranged between the two end plates, is described. Each laminate plate and each end plate comprise a number of cooling holes which are located such that the cooling holes of the laminate plates and the cooling holes of the end plates are aligned with each other to form a number of cooling ducts by the stator material itself. Furthermore, a method for cooling a laminated stator of a generator is described having a cooling fluid guided via a tubing from a cooling fluid reservoir into at least one a partly open cooling duct in the laminated stator.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: August 27, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventor: Henrik Stiesdal
  • Patent number: 8519588
    Abstract: A permanent magnetic rotor for an electric motor, preferably for an internal rotor motor, includes a laminated core consisting of several rotor sheets that are stacked in the axial direction. Permanent magnets are arranged in receiving pockets formed by recesses of the rotor sheets, the laminated core being composed of at least two differently shaped types of rotor sheets. Several rotor sheets of a first type of rotor sheet are provided as retaining sheets that respectively include a central yoke lamination section that is connected or can be connected to the rotor shaft and respectively one or more external pole shoe sections that are connected to the yoke lamination section by one or more connecting bars or bar sections, and several rotor sheets of a second type of rotor sheet are provided as intermediate sheets without connecting bars.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: August 27, 2013
    Assignee: HANNING Elektro-Werke GmbH & Co. KG
    Inventors: Wolfgang Amrhein, Ralf de la Haye, Siegfried Silber
  • Patent number: 8508095
    Abstract: A flux-switching machine stator comprising two or more C-cores, each C-core having two legs and a back portion joining the legs, and a permanent magnet arranged between legs of adjacent C-cores. Each leg has a main portion and a tip portion further from the back portion characterized in that the tip portion of each leg is angled relative to the main portion of the respective leg.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: August 13, 2013
    Assignee: Rolls-Royce PLC
    Inventors: Stephen Mark Husband, David James Powell, Zi-Qiang Zhu, Geraint Wyn Jewell, Arwyn Thomas
  • Publication number: 20130199249
    Abstract: A motor includes an enhanced strength of a stator, the stator being formed with a plurality of core plates stacked one on top of another, and a rotor rotatably disposed at an inner side or at an outer side of the stator. Each core plate includes a body provided in a shape of an arc, a plurality of teeth radially extended from the body, and having a coil wound thereto, at least one first slit part formed on the body by being slit in a radial direction of the body, and at least one second slit part formed on the body by being slit in a circumferential direction of the body.
    Type: Application
    Filed: January 30, 2013
    Publication date: August 8, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: SAMSUNG ELECTRONICS CO., LTD.
  • Patent number: 8492951
    Abstract: A stator assembly includes a segmented stator having stator portions. Each stator portion includes a support structure and dovetails, each coupled to the support structure by adjustable elements. The stator portion also includes stator laminations, where each of the laminations has openings to engage with the dovetails. Connectors are provided to connect the stator portions of the segmented stator together.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: July 23, 2013
    Assignee: General Electric Company
    Inventors: Robert Michael Zirin, Murtuza Lokhandwalla, Kiruba Sivasubramaniam Haran, Richard Nils Dawson, Mark John DeBlock
  • 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
  • Patent number: 8456055
    Abstract: A core block has an arm portion, and a yoke portion extending circumferentially at an end of the arm portion. At least the yoke portion is configured such that a plurality of core segments are stacked in multiple levels in an axial or radial direction. Each of the core blocks has engaging portions formed at respective opposite ends of the yoke portion and adapted to connect adjacent core blocks. In a first-level core segment, each of the engaging portions has a protrusion extending circumferentially from a corresponding one of the opposite ends of the yoke portion, and a recess juxtaposed radially to the protrusion and adapted to receive the protrusion of an adjacent core block. In a second-level core segment, each of the engaging portions has the protrusion and the recess provided in positionally reversed relation with those of the first-level core segment with respect to the radial direction.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: June 4, 2013
    Assignee: Mabuchi Motor Co., Ltd.
    Inventor: Nobuo Kinoshita