Molded Magnetic Powder Resin Patents (Class 310/216.067)
  • Patent number: 10910902
    Abstract: In a rotary electric machine, each of teeth of a stator core is provided with a covering portion. The covering portion of each of the teeth is made of a soft magnetic material having a lower iron loss factor than each steel plate. The covering portion of each of the teeth covers at least a part of a surface of the corresponding one of the teeth.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: February 2, 2021
    Inventors: Makoto Taniguchi, Akira Fukushima
  • Patent number: 10627258
    Abstract: In a related-art resolver, a front and a back of a stator core cannot be distinguished, and it is difficult to mass-produce the resolver while matching directions of shear drops and burrs. Thus, assembly accuracy of the resolver is degraded. Further, productivity and assembling ability are degraded because electromagnetic steel sheets are laminated by rotary lamination. The present invention provides a resolver including: a resolver stator including: a stator core formed of electromagnetic steel sheets, which have teeth, and are laminated without rotary lamination; a one-phase excitation winding; and two-phase output windings; and a resolver rotor arranged to be opposed to the resolver stator, in which the stator core has marks which enable distinction of a rolling direction of the stator core and distinction of a front and a back of the stator core.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: April 21, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yusuke Morita, Atsushi Yamamoto, Masahiko Fujita, Naohiro Motoishi, Kazumasa Ito, Masatsugu Nakano
  • Patent number: 10541591
    Abstract: A stator for an axial flux machine includes a back iron, a plurality of stator teeth extending from the back iron, and a plurality of tooth tips attached to the stator teeth. The back iron and the stator teeth include a first material. Each stator tooth has a first end proximate the back iron and a second end. Each tooth tip is attached to the second end of a different stator tooth. The tooth tips include a second material different than the first material.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: January 21, 2020
    Inventors: Dean James Patterson, Mark Thiele, Greg Heins, Matthew J. Turner
  • Patent number: 10516311
    Abstract: Provided are an axial gap motor and a method for manufacturing a winding therefore capable of realizing low cost and high output without causing a jumper wire of a continuously wound coil obtained by winding an insulated conductor wire to protrude from the coil. The axial gap motor comprises a stator which is obtained by disposing a plurality of coils in a ring shape, and a rotor which is rotatably attached so as to face one or both principal surfaces of the stator and includes a plurality of permanent magnets corresponding to the plurality of coils of the stator. Each of the plurality of coils constituting the stator is formed by continuously winding one or more insulated conductor wires as coil wires around two or more separation cores. A core lamination thickness is indicated by “L1?” and a radial length of each coil is indicated by “L2”, a relation of L2<L1? is satisfied.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: December 24, 2019
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yuichiro Tanaka, Hiroshi Ichige
  • Patent number: 10284041
    Abstract: To provide a stator of a motor having an insulating structure achieving insulation easily and reliably.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: May 7, 2019
    Inventors: Takeshi Tamaki, Kouji Kobayashi, Koutarou Yamada
  • Patent number: 10116180
    Abstract: A rotary electric machine stator includes a stator core, a multi-layer winding coil, a first insulating resin layer, and a second insulating resin layer. The multi-layer winding coil is arranged with a predetermined number of steps in the radial direction of the teeth. Each step of the multi-layer winding coil includes a lowest layer coil of one winding and a surface layer coil of another winding. The first insulating resin layer is arranged between the teeth and the lowest layer coil, or between an insulator that is fixed to the teeth and the lowest layer coil. The second insulating resin layer is arranged locally at curved portions of the multi-layer winding coil that correspond to corner portions of four corners of a rectangular cross-section of the teeth. The second insulating resin layer is arranged extending across a plurality of steps of the multi-layer winding coil.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: October 30, 2018
    Inventors: Shingo Nagai, Hiroyuki Hattori
  • Patent number: 10069385
    Abstract: We describe a method of manufacturing a housing for the stator of an axial flux permanent magnet machine, in particular a Yokeless and Segmented Armature motor, the machine having a stator comprising a set of coils wound on respective stator bars and disposed circumferentially at intervals about an axis of the machine, and a rotor bearing a set of permanent magnets and mounted for rotation about said axis, and wherein said rotor and stator are spaced apart along said axis to define a gap therebetween in which magnetic flux in the machine is generally in an axial direction.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: September 4, 2018
    Assignee: YASA LIMITED
    Inventors: Charles Edmund King, Jonathan James Biddulph
  • Patent number: 9735655
    Abstract: An arrangement has at least one electrical winding having a one-part or multi-part component produced from a soft-magnetic powder composite material, which component conducts an electromagnetic flow of the winding, at least in certain regions, and has a recess provided in the region of this flow conduction, and having a one-part or multi-part, particularly metallic connector part, which has a greater mechanical strength and/or electrical conductivity and/or thermal conductivity as compared to the component, and projects into the recess of the component. In order to achieve particular thermal, mechanical and/or electrical properties, the recess penetrates the component in the region of its flow conduction, and the connector part that projects through this recess forms a mechanical, electrical and/or thermal bridge that bridges the component.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: August 15, 2017
    Assignee: Miba Sinter Austria GmbH
    Inventors: Christian Sandner, Dietmar Andessner, Ralf Kobler
  • Patent number: 9170616
    Abstract: Micro porous absorber structures that be tuned to attenuate noise at the blade pass frequency (BPF) of a cooling fan. The absorber may comprises a panel covered with micro-porous openings with an air gap under the panel. The size of the air gap may be adjusted dynamically to optimize noise attenuation for a fan operating at different speeds.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: October 27, 2015
    Assignee: Intel Corporation
    Inventors: Willem Beltman, Jessica Gullbrand
  • 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
  • Publication number: 20140265716
    Abstract: There is provided a soft magnetic core including: soft magnetic powder particles having an insulating coating layer formed on surfaces thereof and metal powder particles positioned between the soft magnetic powder particles.
    Type: Application
    Filed: May 17, 2013
    Publication date: September 18, 2014
    Inventors: Hak Kwan KIM, Sung Yong AN, No Il PARK, Dong Hyeok CHOI
  • Patent number: 8508096
    Abstract: There is provided a stator core including a core back having an opening such that the core back is fixed to a stationary member by being pressed and fitted thereto; and a plurality of teeth portions being protruded from the core back in a radial direction, each teeth portion including a winding recess around which a coil is wound, wherein the core back and the teeth portions are formed by a sintering process. Since the coil is wound around the winding recess, the height of the wound coil can be reduced.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: August 13, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Dae Lyun Kang, Dong Yeon Shin
  • Publication number: 20130200744
    Abstract: This brushless DC motor (1) is provided with a stator (3) having a main body (312, 322) disposed on both ends thereof in the rotational axis direction with a single exciting coil (2) disposed between the main bodies (312, 322), and with a rotor (4) disposed in the interior of the stator (3), wherein main body (312) is formed with a first magnetic core (31) and main body (322) is formed with a second magnetic core (32), the magnetic cores (31, 32) functioning as a magnetic pole and having protrusions (311, 321), the quantity of which being different for each magnetic core (31, 32). The brushless DC motor (1) uses, as the driving force, the variation in the magnetic resistance between the stator (3) and the rotor (4) in relation to the flow of the magnetic flux generated in the periphery of the exciting coil (2).
    Type: Application
    Filed: October 4, 2011
    Publication date: August 8, 2013
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Kenichi Inoue, Akira Tsutsui, Hiroshi Hashimoto, Hiroyuki Mitani, Kyoji Zaitsu
  • Patent number: 8368278
    Abstract: A motor comprising a stator having a plurality of magnetic poles disposed in a circumferential direction along an outer periphery thereof, a rotor disposed rotatably around the outer periphery of the stator, and a magnet disposed in a circumferential direction along an inner periphery of the rotor. The stator is formed by laminating sheet-like plates. A plurality of the sheet-like plates including an outermost layer of this laminated body comprises a flat portion substantially perpendicular to the magnet, and an extended portion bent to a direction substantially parallel to the magnet. A part of the sheet-like plate having the extended portion disposed to the outermost side is formed into a thickness smaller than thicknesses of the other parts.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: February 5, 2013
    Assignee: Panasonic Corporation
    Inventors: Yuichi Yoshikawa, Hiroshi Murakami, Atsuyoshi Koshiba, Haruki Kato, Yasuo Kunishige, Koji Kadowaki, Hiroyuki Asai
  • Patent number: 8310125
    Abstract: In a motor comprising a stator and a rotor disposed in an inner circumference of the stator, the stator comprises a substantially cylindrical stator core and coils made up of wound conductors, and the stator core comprises an outer circumferential portion which constitutes an outer circumferential wall of the stator and an inner circumferential portion round which the conductors are wound. The outer circumferential portion is formed of a first sintered metal made of a powder magnetic material, while the inner circumferential portion is formed of a second sintered metal made of a powder magnetic material, and the first sintered metal is a sintered metal having a higher mechanical strength than the second sintered metal. Additionally, the stator core is formed by diffusion bonding the outer circumferential portion and the inner circumferential portion being bonded together.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: November 13, 2012
    Assignee: JTEKT Corporation
    Inventor: Yasuhiro Yukitake
  • Patent number: 7952252
    Abstract: Disclosed herein is an inner rotor type permanent magnet excited transverse flux motor, in which a laminated structure in an axial direction or in a radial shape is applied to a stator iron core so as to employ a small amount of permanent magnets compared with a conventional outer rotor type permanent magnet excited transverse flux motor, thus providing high output power, increasing the efficiency of power generation, and reducing noise and vibration.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: May 31, 2011
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Do Hyun Kang, Jung Hwan Chang, Ji Young Lee, Ji Won Kim, Shi Uk Chung
  • Publication number: 20100225195
    Abstract: An object is to enable simple manufacture of a motor, especially, a stator core or a field without impairment of motor characteristics. The motor includes a shaft, a rotor fixed to the shaft, and a stator including a stator core that faces the rotor with a certain space therebetween and coils that are attached to the stator core. The stator includes a back yoke, and the stator core having a plurality of teeth that are circumferentially placed in an axial end face of the back yoke so as to stand upright axially of the back yoke, and that are formed of a dust core made of pressed magnetic powder. The above-mentioned teeth are buried axially to a certain depth in the back yoke.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 9, 2010
    Inventors: Yoshinari Asano, Shin Nakamasu, Toshinari Kondou
  • Publication number: 20100187940
    Abstract: A rotating electrical machine that includes a stator formed by winding a coil around a stator core of a substantially cylindrical shape; and a rotor rotatably supported at an inside in a radial direction of the stator, wherein at least one coil end portion in an axial direction of the stator is a curved coil end portion formed to be curved inward in a radial direction of the stator core.
    Type: Application
    Filed: January 20, 2010
    Publication date: July 29, 2010
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihisa Yamamoto, Ken Takeda, Tomohiro Inagaki, Yasuo Yamaguchi
  • Patent number: 7723891
    Abstract: A motor including a mounting shaft having a hollow channel and a bearing attached to each end, a cylindrical hub having a hollow core for the mounting shaft, and plural rows of plural Molded Magnetic Flux Channels with a hollow core and a channel forming a U-shaped recess and mounted the surface of the hub, each row corresponding to a motor phase. Each magnetic flux channel forms two pole pieces divided by the channel. The motor also includes plural phase windings, one passing through each row of plural Molded Magnetic Flux Channels, a rotating drum having plural rows of permanent magnets on an inner surface, each row pair corresponding to and aligned with one of the plural rows of Molded Magnetic Flux Channels. The rotating drum connected with the bearing, and drive electronics for driving the plural phase windings, wherein the plural Molded Magnetic Flux Channels increases torque and motor efficiency.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: May 25, 2010
    Inventor: Norman Rittenhouse
  • Patent number: 7714475
    Abstract: In a multiple phase claw pole type motor which includes: a plurality of claw poles including a claw portion extending in an axial direction and having a magnetic pole surface facing a rotor in a state of being separated from the rotor by a small gap, a radial yoke portion extending radially outwardly from this claw portion, and an outer peripheral yoke extending from this radial yoke portion in the same direction as the direction of extension of the claw portion; a stator core formed by alternately placing the claw poles in a circumferential direction so that a distal end of each claw portion faces the outer peripheral yoke of an adjacent one of the claw poles; and a stator constructed by sandwiching an annular coil with the adjacent claw poles of this stator core, a multiple phase claw pole type motor characterized in that the claw poles are formed by compacting a magnetic powder and are formed of a magnetic compact having a DC magnetizing property of its flux density becoming 1.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: May 11, 2010
    Assignees: Hitachi Industrial Equipment Systems Co., Ltd., Hitachi Powdered Metals Co., Ltd., Japan Servo Co., Ltd.
    Inventors: Yuji Enomoto, Motoya Ito, Kenji Miyata, Chio Ishihara, Ryoso Masaki, Yasuaki Motegi, Kouki Isozaki, Tadashi Sato
  • Patent number: 7705494
    Abstract: An electric motor includes an annular stator core having a pair of ends opposed to each other in an axial direction, and a coil wound around the stator core. The stator core includes a pair of powder magnetic cores each arranged at the pair of ends and a laminated steel plate arranged between the paired powder magnetic cores. Each of the paired powder magnetic cores includes a section arranged outside the coil in the axial direction.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: April 27, 2010
    Assignee: JTEKT Corporation
    Inventor: Hirohide Inayama