Patents by Inventor Ken Nagakura

Ken Nagakura 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: 11031832
    Abstract: According to one embodiment, a stator includes spacing strips disposed to be interposed in the electromagnetic steel plates for each predetermined set of plates of the electromagnetic steel plates, each of the spacing strips extending in a radial direction of the stator iron core to form ventilation ducts, a spacing strip attachment plate which is disposed between the spacing strips and the set of plates of the electromagnetic steel plates to fix the spacing strips, and an insulating layer which covers the entirety of the spacing strip attachment plate and the spacing strips fixed to the spacing strip attachment plate.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: June 8, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions Corporation
    Inventors: Shunsuke Ishizaki, Ken Nagakura, Yuichiro Gunji, Norio Takahashi, Masahiro Seki
  • Publication number: 20200028401
    Abstract: A rotary electric machine and a turbine system including a housing, and a hydrogen generator arranged into or on the housing. The hydrogen generator electrolytically generates hydrogen from water. The hydrogen generator supplies the hydrogen into the housing.
    Type: Application
    Filed: July 2, 2019
    Publication date: January 23, 2020
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions Corporation
    Inventors: Tomoyuki Takahashi, Ken Nagakura, Hiroyuki Yoda, Daisuke Murata, Hiroshi Kawakami, Junichi Mori, Masahiro Seki
  • Publication number: 20190312472
    Abstract: According to one embodiment, a stator includes spacing strips disposed to be interposed in the electromagnetic steel plates for each predetermined set of plates of the electromagnetic steel plates, each of the spacing strips extending in a radial direction of the stator iron core to form ventilation ducts, a spacing strip attachment plate which is disposed between the spacing strips and the set of plates of the electromagnetic steel plates to fix the spacing strips, and an insulating layer which covers the entirety of the spacing strip attachment plate and the spacing strips fixed to the spacing strip attachment plate.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions Corporation
    Inventors: Shunsuke ISHIZAKI, Ken NAGAKURA, Yuichiro GUNJI, Norio TAKAHASHI, Masahiro SEKI
  • Publication number: 20190052134
    Abstract: A stator core support device according to an embodiment includes plural types of support members that support a stator core on a stator frame disposed radially outward. These support members are combined so as to form a closed circuit portion. Then, an insulating part for electrically insulating part of the closed circuit portion is provided.
    Type: Application
    Filed: July 31, 2018
    Publication date: February 14, 2019
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Norio TAKAHASHI, Masafumi FUJITA, Takahiro SATO, Hideyuki NAKAMURA, Ken NAGAKURA, Kazuma TSUJIKAWA
  • Patent number: 8421302
    Abstract: According to one embodiment, there is provided a rotating electrical machine including a core, a coil extending from the core, and an electromagnetic shield which is provided outside the core, and has a plurality of shoulders projecting toward the coil. The coil includes an insulator covering outside of a conductor, a resistance layer formed on a surface of the insulator and contacting the core, and at least one potential grading layer formed on a surface of the insulator adjacent to the resistance layer. A boundary between the resistance layer and potential grading layer is provided at a position farther from the core than a point on a surface of the coil, where a distance between the coil and a shoulder of the electromagnetic shield closest to the core is the shortest.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Harakawa, Tetsushi Okamoto, Yoshiyuki Inoue, Tooru Ootaka, Hiroshi Hatano, Mikio Kakiuchi, Toshihiko Shinoda, Makoto Kawahara, Masashi Kobayashi, Wataru Nakamura, Ken Nagakura, Masamitsu Sakuma
  • Patent number: 8138653
    Abstract: A rotating electric machine is provided, where a generator has an increased capacity and a reduced size achieved by electromagnetically effectively utilizing that parts of a rotor core which are outside the narrowest parts of magnetic poles of the rotor core to permit large field current and suppress an increase in temperature of rotor coils. The rotating electric machine includes a stator constructed by winding armature coils around a stator core (1), and a hollow circular cylindrical rotor. The rotor has at least one pair of magnetic poles (2), non-polar portions (3) between the magnetic poles, and interpolar portions (6) arranged in the non-polar portions. In the non-polar portions (3), a plurality of rotor slots (4) are arranged at predetermined intervals. Field windings are wound in each rotor slot (4).
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: March 20, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Taniyama, Yasuo Kabata, Masafumi Fujita, Tadashi Tokumasu, Norio Takahashi, Masanori Arata, Ken Nagakura
  • Publication number: 20110074241
    Abstract: According to one embodiment, there is provided a rotating electrical machine including a core, a coil extending from the core, and an electromagnetic shield which is provided outside the core, and has a plurality of shoulders projecting toward the coil. The coil includes an insulator covering outside of a conductor, a resistance layer formed on a surface of the insulator and contacting the core, and at least one potential grading layer formed on a surface of the insulator adjacent to the resistance layer. A boundary between the resistance layer and potential grading layer is provided at a position farther from the core than a point on a surface of the coil, where a distance between the coil and a shoulder of the electromagnetic shield closest to the core is the shortest.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 31, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi Harakawa, Tetsushi Okamoto, Yoshiyuki Inoue, Tooru Ootaka, Hiroshi Hatano, Mikio Kakiuchi, Toshihiko Shinoda, Makoto Kawahara, Masashi Kobayashi, Wataru Nakamura, Ken Nagakura, Masamitsu Sakuma
  • Patent number: 7863794
    Abstract: There is provided a 3-phase 2-layer armature winding of a rotating electrical machine. The lead-out connection conductor connected to the output terminal is connected to a coil piece positioned at least farther than a first coil piece inside the phase belt counted from the end of the each phase belt, and a coil piece positioned at the end of the phase belt is connected to a coil piece positioned at least farther than the n-th (n is an integer larger than 1) inside the phase belt counted from the other end of the phase belt in the same parallel circuit, by a jumper wire.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: January 4, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi, Hiroshi Hatano, Takashi Ueda, Ken Nagakura
  • Publication number: 20100277029
    Abstract: There is provided a 3-phase 2-layer armature winding of a rotating electrical machine. The lead-out connection conductor connected to the output terminal is connected to a coil piece positioned at least farther than a first coil piece inside the phase belt counted from the end of the each phase belt, and a coil piece positioned at the end of the phase belt is connected to a coil piece positioned at least farther than the n-th (n is an integer larger than 1) inside the phase belt counted from the other end of the phase belt in the same parallel circuit, by a jumper wire.
    Type: Application
    Filed: July 12, 2010
    Publication date: November 4, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masafumi Fujita, Tadashi Tokumasu, Mikio Kakiuchi, Hiroshi Hatano, Takashi Ueda, Ken Nagakura
  • Publication number: 20100084942
    Abstract: A rotating electric machine is provided, where a generator has an increased capacity and a reduced size achieved by electromagnetically effectively utilizing that parts of a rotor core which are outside the narrowest parts of magnetic poles of the rotor core to permit large field current and suppress an increase in temperature of rotor coils. The rotating electric machine includes a stator constructed by winding armature coils around a stator core (1), and a hollow circular cylindrical rotor. The rotor has at least one pair of magnetic poles (2), non-polar portions (3) between the magnetic poles, and interpolar portions (6) arranged in the non-polar portions. In the non-polar portions (3), a plurality of rotor slots (4) are arranged at predetermined intervals. Field windings are wound in each rotor slot (4).
    Type: Application
    Filed: April 18, 2007
    Publication date: April 8, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiro Taniyama, Yasuo Kabata, Masafumi Fujita, Tadashi Tokumasu, Norio Takahashi, Masanori Arata, Ken Nagakura