Patents by Inventor Toru Shikayama

Toru Shikayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200204100
    Abstract: A linear motor control apparatus for controlling at least one of torque, speed and position of a linear motor includes circuitry that receives at least one of a magnetic pole position value, torque command signal, and speed command signal, and imparts a high-frequency voltage to at least one of a d-axis and a q-axis and impart a load current to the q-axis based on the at least one of the magnetic pole position value, torque command signal, and speed command signal. The d-axis is an axis extending in a central direction of a stator tooth of a stator, and the q-axis is an axis extending in a direction offset 90 degrees from the central direction in an electrical angle.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Applicant: Kabushiki Kaisha Yaskawa Denki
    Inventors: Masanobu KAKIHARA, Shogo MAKINO, Toru SHIKAYAMA
  • Patent number: 10622928
    Abstract: This disclosure discloses a linear motor including a stator and a mover including a field magnet and an armature winding. The mover includes a mover iron core including a plurality of teeth around each of which the armature winding is wound. Some or all of the plurality of teeth include a first hole formed in a slot housing the armature winding.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: April 14, 2020
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Masanobu Kakihara, Shogo Makino, Toru Shikayama
  • Patent number: 10355574
    Abstract: This disclosure discloses a linear motor including a stator, a mover, and a plurality of teeth. The stator includes a stator curved part having an arc shape in a longitudinal direction. The mover is arranged facing the stator and is moved in the longitudinal direction of the stator. The plurality of teeth are arranged in parallel along the longitudinal direction so that a pitch of the teeth at an outer-peripheral side is larger than the pitch of the teeth at an inner-peripheral side on the stator curved part.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: July 16, 2019
    Inventors: Shogo Makino, Toru Shikayama, Masanobu Kakihara, Masayuki Hirayama, Haruki Yahara
  • Publication number: 20160359402
    Abstract: This disclosure discloses a linear motor including a stator, a mover, and a plurality of teeth. The stator includes a stator curved part having an arc shape in a longitudinal direction. The mover is arranged facing the stator and is moved in the longitudinal direction of the stator. The plurality of teeth are arranged in parallel along the longitudinal direction so that a pitch of the teeth at an outer-peripheral side is larger than the pitch of the teeth at an inner-peripheral side on the stator curved part.
    Type: Application
    Filed: June 3, 2016
    Publication date: December 8, 2016
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shogo MAKINO, Toru SHIKAYAMA, Masanobu KAKIHARA, Masayuki HIRAYAMA, Haruki YAHARA
  • Publication number: 20160268883
    Abstract: This disclosure discloses a linear motor including a stator and a mover including a field magnet and an armature winding. The mover includes a mover iron core including a plurality of teeth around each of which the armature winding is wound. Some or all of the plurality of teeth include a first hole formed in a slot housing the armature winding.
    Type: Application
    Filed: March 11, 2016
    Publication date: September 15, 2016
    Applicant: Kabushiki Kaisha Yaskawa Denki
    Inventors: Masanobu KAKIHARA, Shogo MAKINO, Toru SHIKAYAMA
  • Patent number: 9379649
    Abstract: A linear motor system includes a stator, a mover, and a controller. The stator includes a plurality of armature coil units arranged so as to be spaced apart from one another at certain intervals. The mover includes a permanent magnet. The controller is configured to sequentially select, as a power-feeding target, an armature coil unit opposing the mover from among the plurality of armature coil units, perform, for the power-feeding target, computation for power-feeding control on the basis of a speed command, and sequentially feed power to the armature coil unit. The controller includes a power-feeding-switching compensation function of performing switching compensation when the power-feeding target is switched to a next armature coil unit.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: June 28, 2016
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yoshiyasu Takase, Shinya Morimoto, Toru Shikayama, Minoru Koga, Nobuhiro Umeda
  • Patent number: 9118237
    Abstract: A mover for a linear motor includes an armature having a plurality of teeth arranged along a line and wound with coils. The mover further includes a main-pole magnet array arranged at a side of the armature at which the teeth exist. The main-pole magnet array includes a plurality of main-pole magnets with different polarities alternately arranged along an arranging direction of the teeth. The mover further includes at least one auxiliary-pole magnet arranged adjacent to one end or both ends of the main-pole magnet array.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: August 25, 2015
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shogo Makino, Toru Shikayama
  • Publication number: 20150035458
    Abstract: A linear motor system includes a stator, a mover, and a controller. The stator includes a plurality of armature coil units arranged so as to be spaced apart from one another at certain intervals. The mover includes a permanent magnet. The controller is configured to sequentially select, as a power-feeding target, an armature coil unit opposing the mover from among the plurality of armature coil units, perform, for the power-feeding target, computation for power-feeding control on the basis of a speed command, and sequentially feed power to the armature coil unit. The controller includes a power-feeding-switching compensation function of performing switching compensation when the power-feeding target is switched to a next armature coil unit.
    Type: Application
    Filed: March 25, 2014
    Publication date: February 5, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yoshiyasu TAKASE, Shinya MORIMOTO, Toru SHIKAYAMA, Minoru KOGA, Nobuhiro UMEDA
  • Patent number: 8860261
    Abstract: An actuator according to an embodiment includes support mechanisms that are disposed in plural places of an output shaft in a longitudinal direction and support the output shaft in a linear direction and a rotation direction, a motor portion that is disposed in a longitudinal direction of the output shaft and drives the output shaft in the linear direction and the rotation direction, a first detecting portion that detects an angle of a rotation direction of the output shaft, and a second detecting portion that detects displacement of the direct direction of the output shaft.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: October 14, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Shogo Makino, Toru Shikayama, Haruki Yahara
  • Patent number: 8847443
    Abstract: A stator for a linear motor includes a yoke portion made of a soft magnetic material. The yoke portion includes an attachment portion to which a fastener for fixing the yoke portion to an installation target is attached. The yoke portion extends rectilinearly. The yoke portion further includes a plurality of salient poles protruding from the yoke portion. The salient poles are arranged at a specified interval along an extension direction of the yoke portion.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: September 30, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Shogo Makino, Toru Shikayama
  • Patent number: 8502423
    Abstract: A linear motor includes a field including main-magnetic-pole permanent magnets magnetized in a direction of a generation magnetic field, and sub-magnetic-pole permanent magnets magnetized in a direction different from the direction of magnetic poles of the main-magnetic-pole permanent magnets, portions of the main-magnetic-pole permanent magnets located at a magnetic-field generation side being replaced with soft magnetic materials; and an armature including an armature core having teeth and armature coils wound around the armature cores. The linear motor satisfies ?<?, where ? is a pitch of the magnetic poles of the field, and ? is a pitch of the teeth.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: August 6, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Toru Shikayama, Masanobu Kakihara, Motomichi Ohto
  • Patent number: 8446054
    Abstract: A periodic magnetic field generation device is provided with a field pole of a Halbach array structure in which main pole permanent magnets magnetized in a direction of a generated field and sub pole permanent magnets magnetized in a direction opposite to the direction of magnetic poles of the main pole permanent magnets are alternately disposed linearly or circularly so as to be adjacent to each other. A part of each of the main pole permanent magnets on a side on which the magnetic field is generated is replaced by a soft magnetic member, and a relation between a length A of the soft magnetic member on the side of the generated field along a moving direction and a length B of each main pole permanent magnet on a side of a back yoke along the moving direction is A<B.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: May 21, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Akihito Toyota, Toru Shikayama, Masanobu Kakihara
  • Publication number: 20130049489
    Abstract: A mover for a linear motor includes an armature having a plurality of teeth arranged along a line and wound with coils. The mover further includes a main-pole magnet array arranged at a side of the armature at which the teeth exist. The main-pole magnet array includes a plurality of main-pole magnets with different polarities alternately arranged along an arranging direction of the teeth. The mover further includes at least one auxiliary-pole magnet arranged adjacent to one end or both ends of the main-pole magnet array.
    Type: Application
    Filed: March 12, 2012
    Publication date: February 28, 2013
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shogo MAKINO, Toru SHIKAYAMA
  • Publication number: 20130049488
    Abstract: A stator for a linear motor includes a yoke portion made of a soft magnetic material. The yoke portion includes an attachment portion to which a fastener for fixing the yoke portion to an installation target is attached. The yoke portion extends rectilinearly. The yoke portion further includes a plurality of salient poles protruding from the yoke portion. The salient poles are arranged at a specified interval along an extension direction of the yoke portion.
    Type: Application
    Filed: March 12, 2012
    Publication date: February 28, 2013
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shogo MAKINO, Toru SHIKAYAMA
  • Patent number: 8384251
    Abstract: A linear and curvilinear motor system includes: linear and curvilinear guiding devices movably guiding and respectively supporting right and left of a slider, each having a guide rail configured by linear tracks and a circular arc track and slider blocks; a motor unit having a stator with a stator linear section and a stator circular arc section and a mover with a linear section and provided for the slider and away from the stator with a gap interposed therebetween; and an encoder head and a hole sensor detecting positions of the linear tracks and the circular arc track. When a magnetic pole pitch of the linear section of the stator is a distance ?m and a magnetic pole pitch of the circular arc section of the stator is an angle ?m, a radius r of the circular arc track at the position detection point is defined as r=?m/?m.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Denki
    Inventors: Toru Shikayama, Mikio Oshima, Kenichi Sadakane, Shogo Makino
  • Patent number: 8384317
    Abstract: Provided is a linear motor device which is compact even when a stroke is increased, which can reduce heat generation, and which can eliminate damping force caused by circulating current. The linear motor device includes a linear motor that includes a movable member having a plurality of fields and a stator in which a plurality of armatures including polyphase coils are arranged in line in the moving direction of the movable member, and a controller that sequentially outputs control commands to current amplifiers respectively connected to the armatures in accordance with the relative position of the movable member. The controller selectively outputs the control commands to only the current amplifiers corresponding to the armatures which are opposite the movable member such that the armatures are positioned within a range corresponding to the length in the moving direction of the movable member.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Toru Shikayama, Katsutoshi Yamanaka
  • Patent number: 8384252
    Abstract: The disclosure discloses a linear motor comprising: a field system in which a plurality of permanent magnets are linearly arranged: and an armature configured to face said field system and to have an armature core provided with armature windings, said linear motor running along a predetermined direction of travel with either said field system or said armature serving as a mover and the other serving as a stator, wherein: said armature core comprises: auxiliary teeth that are respectively provided on both ends along said direction of travel and around which said armature windings are not wound; and a plurality of main teeth that are provided between said auxiliary teeth, and each of said auxiliary teeth comprises an end portion shape in which a dimension in a teeth height direction orthogonal to said direction of travel is variable along said direction of travel.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Masanobu Kakihara, Toru Shikayama
  • Patent number: 8179001
    Abstract: A linear motor armature includes a plurality of armature core blocks that are linearly connected to each other, each armature core block being formed of a stack of a plurality of armature cores that are substantially I-shaped, each armature core block including teeth portions around which armature coils are wound, the teeth portions being provided in two end portions of the armature core block in a longitudinal direction of the armature core block, and a step portion extending in a direction perpendicular to the longitudinal direction of the armature core block, the step portion being provided at a center of the armature core block and having a width larger than a width of the teeth portions, wherein an attachment hole for fixing each of the plurality of armature core blocks to an external armature attachment plate is formed in each of two side portions of the step portion.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: May 15, 2012
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Masanobu Kakihara, Toru Shikayama, Motomichi Ohto
  • Publication number: 20120049657
    Abstract: A linear motor includes a field including main-magnetic-pole permanent magnets magnetized in a direction of a generation magnetic field, and sub-magnetic-pole permanent magnets magnetized in a direction different from the direction of magnetic poles of the main-magnetic-pole permanent magnets, portions of the main-magnetic-pole permanent magnets located at a magnetic-field generation side being replaced with soft magnetic materials; and an armature including an armature core having teeth and armature coils wound around the armature cores. The linear motor satisfies ?<?, where ? is a pitch of the magnetic poles of the field, and ? is a pitch of the teeth.
    Type: Application
    Filed: August 23, 2011
    Publication date: March 1, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Toru SHIKAYAMA, Masanobu Kakihara, Motomichi Ohto
  • Publication number: 20120001499
    Abstract: An actuator according to an embodiment includes support mechanisms that are disposed in plural places of an output shaft in a longitudinal direction and support the output shaft in a linear direction and a rotation direction, a motor portion that is disposed in a longitudinal direction of the output shaft and drives the output shaft in the linear direction and the rotation direction, a first detecting portion that detects an angle of a rotation direction of the output shaft, and a second detecting portion that detects displacement of the direct direction of the output shaft.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shogo MAKINO, Toru Shikayama, Haruki Yahara