Having Axially Extended Spirally-laminated Core Patents (Class 310/216.013)
  • Patent number: 10574127
    Abstract: In an actuator (camera driver) according to the present invention, when a movable unit is in a neutral position in which the movable unit has rotated around neither an axis nor an axis, a first synthetic vector and a second synthetic vector are directed toward an object to be driven with respect to a plane including the both axes. The first synthetic vector is defined by synthesizing together two first vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of first driving magnets and the pair of magnetic yokes. The second synthetic vector is defined by synthesizing together two second vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of second driving magnets and the pair of magnetic yokes.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: February 25, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Teruyuki Takizawa, Hironori Tomita, Tsutomu Shimomura, Masakazu Kobayashi, Yasuaki Kameyama, Hirohide Ichihashi
  • Patent number: 10498206
    Abstract: An electric tool is provided with a rotary striking mechanism unit converting the rotational force of a brushless motor to a striking force and applying the striking force to a tip tool. The required rated input of the motor is 1000-1300 W, the motor speed under fixed speed control is 16800±10% (min?1), and the variable Ku, which relates to the motor, is defined by the following expression Ku={(stator core outer diameter)2×(stator core lamination thickness)×(total tooth width)×(rotor outer diameter)}÷{(rated input)×(motor speed under fixed speed control)}, wherein the stator core outer diameter, the stator core lamination thickness, the total tooth width and the rotor outer diameter are shown in mm, the rated input is shown in W, the motor speed is shown in min?1, and the Ku value of the motor is set to 14.6<=Ku<=21.8.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: December 3, 2019
    Assignee: Koki Holdings Co., Ltd.
    Inventor: Hideyuki Tanimoto
  • Patent number: 9825512
    Abstract: A laminated core manufacturing method is linearly arranging and punching out a plurality of separate core pieces formed of a back yoke portion and a magnetic-pole teeth portion protruding from the back yoke portion and die-cut caulking. The manufacturing method includes: a first step of punching out a first region located on an opposite side to the magnetic-pole teeth portion between adjacent ends of the back yoke portions of the core pieces; a second step of punching out a second region located on a side of the magnetic-pole teeth portion between the adjacent ends of the back yoke portions of the core pieces; a third step of punching out a region that brings the first region punched out in the first step and the second region punched out in the second step into communication; and a fourth step of forming the magnetic-pole teeth portion by punching.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: November 21, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Daisuke Shijo, Hiroyuki Akita
  • Patent number: 9705368
    Abstract: An electrical machine, in particular an electric motor, including a rotor, which has a laminated core made up of stacked laminating sheets having at least two tangentially extending holes, in each of which at least one permanent magnet is at least largely accommodated, at least one laminating sheet having at least one elastic arm, which is arranged between the at least two permanent magnets and lies against a permanent magnet and resiliently acts on said permanent magnet substantially in a tangential direction.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 11, 2017
    Assignee: BÜHLER MOTOR GMBH
    Inventors: Thomas Schreiber, Georg Bonk
  • Patent number: 9413212
    Abstract: A molding apparatus and method for fixing permanent magnets in a rotor core during production of drive motors for environmental vehicles, in which the permanent magnets, which are inserted into magnet insertion apertures of the rotor core, are aligned at identical positions with respect to the axial direction of the rotor core, thus contributing to an improvement in the performance of the drive motors.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: August 9, 2016
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jae Young Kie, Kwang Kyeong Sung
  • Patent number: 9306422
    Abstract: A rotor blade set for an electric motor, having a plurality of axially assembled multi-part and/or single-part blades having circle segment shaped blade sections, between which radial and circumferentially open recesses are formed for receiving a respective magnet, wherein a predeterminable number of blade sections of the single-part or multi-part blades have at least one azimuthal clip on the circle radius, which clip bends axially during the insertion of the corresponding magnet into the respective recess, and wherein the circle segment-shaped blade sections of the single-part or multipart blades have at least one notch on the circle radius, in which notch a corresponding clip of a blade section of an axially spaced blade engages following the axial bending.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: April 5, 2016
    Assignee: Brose Fahrzeugteile GmbH & Co. KG, Wuerzburg
    Inventors: Maurad Berkouk, Sylvain Cordrie
  • Patent number: 8941274
    Abstract: A stator for an electric motor that includes a plurality of stacked laminations and a polymeric shell coupled to the plurality of laminations. Each lamination includes an annular plate having a plurality of notches defined therein. Each notch has an end positioned between the side walls of the annular plate. A plurality of teeth extend from one side wall of the annular plate. Each lamination includes a first slot defined at the first end of each notch and a second slot spaced apart from the first slot, the first slots of the laminations are aligned to define a first plurality of passageways, the second slots of the laminations are aligned to define a second plurality of passageways, and the polymeric shell includes a plurality of support beams that extend through the first plurality of passageways and the second plurality of passageways.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: January 27, 2015
    Assignee: Whirlpool Corporation
    Inventors: Christian Gianni, Marcelo N. Schlickmann, Orlando Starke, Richard S. Wallace
  • 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: 8106561
    Abstract: A laminated core 10 including a plurality of segment core sheets 13 spirally wound and laminated in layers while connecting portions 12 connecting the adjacent segment core sheets 13 are bent, ends of the segment core sheets 13 are aligned with each other and the connecting portions 12 in the adjacent layers are circumferentially displaced relative to each other, the connecting portions 12 located in outer peripheral areas 11 of the segment core sheets 13, the laminated core 10 comprising: a concave cutout 22 formed on a radially outward side of the connecting portion 12, the concave cutout 22 accommodating a radially expanded part 21 within an outer circle of the laminated core 10, the radially expanded part 21 formed in the connecting portion 12 radially outward at the bending of the connecting portion 12; an interior cutout 23 formed on a radially inward side of the connecting portion 12, the interior cutout 23 defining a bent position of the connecting portion 12; and depressed receptacles 16, 17 resp
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: January 31, 2012
    Assignee: Mitsui High-tec, Inc.
    Inventor: Iwao Myojin
  • Publication number: 20120019093
    Abstract: A laminated core 10 improves material yield and prevents cracks or breakages of core pieces by relaxing stress on connecting portions 13. A connected core segment 14 to be the laminated core 10 includes: a V-shaped cutout 17 located radially inward from the connecting portion 13, the cutout 17 opening in a radially inward direction with an opening angle of 360°/n given that n is a number of core segments 19; a slit 18 located radially outward from the connecting portion 13, the slit 18 dividing adjacent segment yokes 12 located radially outward from the connecting portion; a first through-hole 20 having a circular arc formed in a radially outward end of the cutout 17 in contact with the connecting portion 13; and a second through-hole 21 having a circular arc formed in a radially inward end of the slit 18 in contact with the connecting portion 13.
    Type: Application
    Filed: April 28, 2010
    Publication date: January 26, 2012
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Kiyohisa Maki, Yusuke Hasuo, Mei Arazoe
  • Patent number: 7928627
    Abstract: A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: April 19, 2011
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Akira Nagai, Iwao Myojin, Akinori Hoshino, Masafumi Sakuma, Hiroyuki Yamamoto, Haruji Suzuki
  • Patent number: 7911108
    Abstract: The stator of an electric rotating machine includes a stator core constituted of a plurality of core pieces joined to one another in a ring, a plurality of phase windings wound around the stator core, the stator core and the phase windings constituting a core assembly body, and an outer casing into which the core assembly body is fitted. Gaps are provided between an outer periphery of the core assembly body and an inner periphery of the outer casing.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: March 22, 2011
    Assignee: Denso Corporation
    Inventor: Noriyuki Hayashi
  • Patent number: 7893591
    Abstract: A stamping step of forming a plurality of band-shaped core sheets (11), (12) having arc-shaped segment core sheets (15), (15a), the adjacent segment core sheets (15), (15a) connected together by narrow-width connecting portions (16), (16a) provided therebetween, the segment core sheets (15), (15a) having a plurality of pole sections (13), (14), (13a), (14a) protruding radially outward; and an annular shape forming step of winding the plurality of band-shaped core sheets (11), (12) in a spiral form while bending the band-shaped core sheets (11), (12) at the connecting portions (16), (16a) and superimposing the pole sections (13), (14), (13a), (14a) vertically one on another, thereby laminating the band-shaped core sheets (11), (12); wherein in the stamping step, notches (23a), (23) to be positioned in correspondence with the connecting portions (16), (16a) bent in the annular shape forming step are formed at radially outward sides of joining portions (22a), (22), the joining portions joining the adjacent pole
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: February 22, 2011
    Assignee: Mitsui High-Tec, Inc.
    Inventor: Iwao Myojin
  • Patent number: 7777387
    Abstract: A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: August 17, 2010
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Akira Nagai, Iwao Myojin, Akinori Hoshino, Masafumi Sakuma, Hiroyuki Yamamoto, Haruji Suzuki