Patents by Inventor Yuto Fukuma

Yuto Fukuma 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).

  • Patent number: 8760026
    Abstract: A rotor includes first and second permanent magnets provided in each magnetic pole inside a rotor core. The rotor is configured such that when a first end of the first permanent magnet located on the outer circumferential side of the rotor core and the second permanent magnet side is located at a position that faces a first end in the circumferential direction of one of teeth of a stator, a second end of the first permanent magnet located on the axis of rotation side of the rotor core and the second permanent magnet side is located at a position that faces a second end in the circumferential direction of the tooth that faces the first end of the first permanent magnet.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takeo Suzuki, Akihiko Maemura, Yosuke Kawazoe, Yuto Fukuma, Kenji Tomohara
  • Patent number: 8546990
    Abstract: A permanent magnet synchronous rotating electric machine includes a rotor and a stator. The rotor includes a first hole, a second hole, a first magnet, and a second magnet. The second hole is provided on an opposite side with respect to a center line extending along a radial direction of the rotor. The first magnet is provided in the first hole and extends along a first longitudinal axis inclined at a first acute angle with respect to the center line. The second magnet is provided in the second hole and extends along a second longitudinal axis inclined at a second acute angle with respect to the center line. The second acute angle is smaller than the first acute angle.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: October 1, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takeo Suzuki, Akihiko Maemura, Yosuke Kawazoe, Yuto Fukuma, Takeshi Inoue
  • Publication number: 20120256508
    Abstract: A permanent magnet synchronous rotating electric machine includes a rotor and a stator. The rotor includes a first hole, a second hole, a first magnet, and a second magnet. The second hole is provided on an opposite side with respect to a center line extending along a radial direction of the rotor. The first magnet is provided in the first hole and extends along a first longitudinal axis inclined at a first acute angle with respect to the center line. The second magnet is provided in the second hole and extends along a second longitudinal axis inclined at a second acute angle with respect to the center line. The second acute angle is smaller than the first acute angle.
    Type: Application
    Filed: June 19, 2012
    Publication date: October 11, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo SUZUKI, Akihiko MAEMURA, Yosuke KAWAZOE, Yuto FUKUMA, Takeshi INOUE
  • Publication number: 20120212095
    Abstract: A rotor includes first and second permanent magnets provided in each magnetic pole inside a rotor core. The rotor is configured such that when a first end of the first permanent magnet located on the outer circumferential side of the rotor core and the second permanent magnet side is located at a position that faces a first end in the circumferential direction of one of teeth of a stator, a second end of the first permanent magnet located on the axis of rotation side of the rotor core and the second permanent magnet side is located at a position that faces a second end in the circumferential direction of the tooth that faces the first end of the first permanent magnet.
    Type: Application
    Filed: February 29, 2012
    Publication date: August 23, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo SUZUKI, Akihiko MAEMURA, Yosuke KAWAZOE, Yuto FUKUMA, Kenji TOMOHARA
  • Patent number: 8227953
    Abstract: A rotor includes a rotor core, a first magnet, a second magnet, a first pole partition line, and a second pole partition line. The first and second magnets are provided inside the rotor core and between the first and second pole partition line. The first magnet is closer to the first pole partition line than to the second pole partition line, and the second magnet is closer to the second pole partition line than to the first pole partition line. A distance between the first and second magnets at a position is wider as the position is closer to a circumference portion of the rotor core. The first magnet and the first pole partition line have a first minimum distance therebetween, the second magnet and the second pole partition line have a second minimum distance therebetween, and the first minimum distance is smaller than the second minimum distance.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: July 24, 2012
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takeo Suzuki, Akihiko Maemura, Yosuke Kawazoe, Yuto Fukuma, Takeshi Inoue
  • Publication number: 20110266910
    Abstract: A rotor includes a rotor core, a first magnet, a second magnet, a first pole partition line, and a second pole partition line. The first and second magnets are provided inside the rotor core and between the first and second pole partition line. The first magnet is closer to the first pole partition line than to the second pole partition line, and the second magnet is closer to the second pole partition line than to the first pole partition line. A distance between the first and second magnets at a position is wider as the position is closer to a circumference portion of the rotor core. The first magnet and the first pole partition line have a first minimum distance therebetween, the second magnet and the second pole partition line have a second minimum distance therebetween, and the first minimum distance is smaller than the second minimum distance.
    Type: Application
    Filed: July 15, 2011
    Publication date: November 3, 2011
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo SUZUKI, Akihiko Maemura, Yosuke Kawazoe, Yuto Fukuma, Takeshi Inoue
  • Patent number: 8008825
    Abstract: An electromagnetic steel plate forming member provides the two magnet holes for inserting therein the two permanent magnets per pole along the V-shape, which are provided in the region of the radial pole pitch lines OP provided in the rotor core at the predetermined pole pitch angle ?, one magnet hole is displaced in a direction apart from the center line OC of the pole pitch lines OP, and the other magnet hole is displaced in a direction approaching to the center line OC of the pole pitch lines OP.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: August 30, 2011
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takeo Suzuki, Akihiko Maemura, Yosuke Kawazoe, Yuto Fukuma, Takeshi Inoue
  • Patent number: 7825548
    Abstract: The cylindrical linear motor includes: a stator 1 that has a plurality of coils 5 coiled in a cylindrical shape and arranged in an axial direction on an inner side of a metal pipe 4; a mover 2 disposed to face an inner side of the stator 1 with a magnetic gap therebetween and having a plurality of permanent magnets 6 inserted in the axial direction into a cylindrical can 9; shafts 8 inserted into the mover 2; shaft support members 7 for supporting the shafts 8 at both axial ends of the metal pipe 4; and shaft receiving member 10 each disposed at both ends of an inner side of the can 9 to be adjacent to the permanent magnets 6 and having a concave portion 10a for fitting to a cone of the shaft 8.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: November 2, 2010
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Akihiko Maemura, Yosuke Kawazoe, Takeo Suzuki, Yuto Fukuma
  • Publication number: 20090033157
    Abstract: The cylindrical linear motor includes: a stator 1 that has a plurality of coils 5 coiled in a cylindrical shape and arranged in an axial direction on an inner side of a metal pipe 4; a mover 2 disposed to face an inner side of the stator 1 with a magnetic gap therebetween and having a plurality of permanent magnets 6 inserted in the axial direction into a cylindrical can 9; shafts 8 inserted into the mover 2; shaft support members 7 for supporting the shafts 8 at both axial ends of the metal pipe 4; and shaft receiving member 10 each disposed at both ends of an inner side of the can 9 to be adjacent to the permanent magnets 6 and having a concave portion 10a for fitting to a cone of the shaft 8.
    Type: Application
    Filed: April 17, 2006
    Publication date: February 5, 2009
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Akihiko Maemura, Yosuke Kawazoe, Takeo Suzuki, Yuto Fukuma
  • Publication number: 20080231135
    Abstract: An electromagnetic steel plate forming member provides the two magnet holes for inserting therein the two permanent magnets per pole along the V-shape, which are provided in the region of the radial pole pitch lines OP provided in the rotor core at the predetermined pole pitch angle ?, one magnet hole is displaced in a direction apart from the center line OC of the pole pitch lines OP, and the other magnet hole is displaced in a direction approaching to the center line OC of the pole pitch lines OP.
    Type: Application
    Filed: December 20, 2007
    Publication date: September 25, 2008
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo SUZUKI, Akihiko MAEMURA, Yosuke KAWAZOE, Yuto FUKUMA, Takeshi INOUE