Patents by Inventor Takuya SAKURAGI

Takuya SAKURAGI 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: 20250023407
    Abstract: A rotor includes a rotor core having a shaft hole, a cavity section for each magnetic pole, and a cavity. A central surface section of a radially inner wall surface of the cavity section is recessed with respect to a rotor core rotation center. The central surface section includes a vicinity of a first reference line that bisects an angle between two lines connecting the rotation center and circumferential ends of the cavity section. A side surface section of the radially inner wall surface is raised toward an intersection between a second reference line and a wall surface of the shaft hole. The side surface section extends from the central surface section to the circumferential end of the cavity section. The second reference line extends radially from the rotation center and forms an angle with the first reference line obtained by dividing 180° by a number of magnetic poles.
    Type: Application
    Filed: September 27, 2024
    Publication date: January 16, 2025
    Inventors: Yuu FU, Yusuke IRINO, Tatsuya TONARI, Takuya SAKURAGI, Masatsugu TAKEMOTO
  • Publication number: 20250023408
    Abstract: A rotor includes a rotor core having a cavity section having a plurality of cavities for each magnetic pole and a first rib disposed between adjacent ones of the plurality cavities in a circumferential direction. The first rib extends from a radially inner side of the cavity section to a radially outer side of the cavity section. The first rib is provided not to be on a first reference line that bisects an angle between two lines connecting a rotation center of the rotor core and circumferential ends of a set of the plurality of cavities. The first rib includes a linear part extending from the radially inner side of the cavity section to the radially outer side of the cavity section in a direction of a force acting on the first rib while the rotor core is rotating.
    Type: Application
    Filed: September 27, 2024
    Publication date: January 16, 2025
    Inventors: Yuu FU, Yusuke IRINO, Tatsuya TONARI, Takuya SAKURAGI, Masatsugu TAKEMOTO
  • Patent number: 12142980
    Abstract: An electric motor includes a rotor and a stator having a stator core, a suspension winding group, and an armature winding group. The stator core includes a back yoke and a plurality of teeth. The suspension winding group includes a plurality of suspension windings wound on the teeth. The suspension windings generate an electromagnetic force that supports the rotor in a non-contact manner, and generate a magnetic pole inside the stator. The armature winding group includes a plurality of armature windings wound on the teeth. The armature windings generate an electromagnetic force that rotationally drives the rotor, and generate a magnetic pole inside the stator. One of the suspension or armature winding groups includes a plurality of series winding sets with a plurality of series connected windings of a same phase. Each series winding set is connected in parallel with an other one of the series winding sets.
    Type: Grant
    Filed: September 28, 2023
    Date of Patent: November 12, 2024
    Assignee: Daikin Industries, Ltd.
    Inventors: Takuya Sakuragi, Yusuke Irino
  • Publication number: 20240022132
    Abstract: An electric motor includes a rotor and a stator having a stator core, a suspension winding group, and an armature winding group. The stator core includes a back yoke and a plurality of teeth. The suspension winding group includes a plurality of suspension windings wound on the teeth. The suspension windings generate an electromagnetic force that supports the rotor in a non-contact manner, and generate a magnetic pole inside the stator. The armature winding group includes a plurality of armature windings wound on the teeth. The armature windings generate an electromagnetic force that rotationally drives the rotor, and generate a magnetic pole inside the stator. One of the suspension or armature winding groups includes a plurality of series winding sets with a plurality of series connected windings of a same phase. Each series winding set is connected in parallel with an other one of the series winding sets.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 18, 2024
    Inventors: Takuya SAKURAGI, Yusuke IRINO
  • Publication number: 20230216360
    Abstract: A technique by which the magnetic flux of the magnetic pole facing the stator of the magnet can be further increased in a rotor, is provided.
    Type: Application
    Filed: June 8, 2021
    Publication date: July 6, 2023
    Inventors: Takuya SAKURAGI, Yoshiki YASUDA, Daiki MIWA, Akio YAMAGIWA, Hiroshi HIBINO
  • Publication number: 20230216376
    Abstract: An electric motor includes: a rotor configured to be rotatable about a rotation axis and to which a fluid drive unit is fixed; a stator that is disposed inward of the rotor and includes claw pole stator units, the claw pole stator units each including a winding that is wound in an annular shape around the rotation axis and an iron core that surrounds the winding; a hole that is provided in one end portion of the rotor so as to penetrate from inside to outside of the rotor, the stator being provided in the inside and the fluid drive unit being fixed to the outside of the rotor; and an inflow path configured to cause a surrounding fluid to flow into inside of a stator unit, the stator unit being provided at one other end portion opposite to the one end portion in an axial direction.
    Type: Application
    Filed: June 9, 2021
    Publication date: July 6, 2023
    Inventors: Takuya SAKURAGI, Daiki MIWA, Yoshiki YASUDA, Akio YAMAGIWA, Hiroshi HIBINO