Patents by Inventor Yasuo Kabata

Yasuo Kabata 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: 9441607
    Abstract: In one embodiment, a marine current power generation device has rotary blades, rotating shaft, power generator, guide bearings, thrust collars and thrust bearings. The guide bearing has a second slide surface being slidable relative to the first slide surface of the rotating shaft. The thrust bearing has a fourth slide surface being slidable relative to the third slide surface of the rotary plate of the thrust collar. The materials of the first and third slide surfaces include ferrous materials, stainless materials, Ti, Ti alloy, Co, or Co alloy. The materials of the second and fourth slide surfaces include a resin material filled with a first fibrous member and a second fibrous member. The second fibrous member is smaller than the first fibrous member.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: September 13, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Than Trong Long, Tatsuo Yamashita, Yasuo Kabata
  • Patent number: 9159475
    Abstract: According to one embodiment, there is provided a high pressure bushing arranged through by penetrating a stator frame of a rotating electrical machine in which a cooling gas is sealed. At least a communicating hole is provided in the hollow connecting conductor and at least a reflux hole is provided in the gas circulation pipe, such that the cooling gas flows in both of the first gap and the second gap, passes through an inner side of the gas circulation pipe, and is discharged to the machine inner side.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: October 13, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiro Taniyama, Yasuo Kabata, Mikio Kakiuchi, Toshio Kitajima, Takeo Urita, Koji Matsuyama
  • Publication number: 20150110605
    Abstract: In one embodiment, a marine current power generation device has rotary blades, rotating shaft, power generator, guide bearings, thrust collars and thrust bearings. The guide bearing has a second slide surface being slidable relative to the first slide surface of the rotating shaft. The thrust bearing has a fourth slide surface being slidable relative to the third slide surface of the rotary plate of the thrust collar. The materials of the first and third slide surfaces include ferrous materials, stainless materials, Ti, Ti alloy, Co, or Co alloy. The materials of the second and fourth slide surfaces include a resin material filled with a first fibrous member and a second fibrous member. The second fibrous member is smaller than the first fibrous member.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 23, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Than Trong LONG, Tatsuo Yamashita, Yasuo Kabata
  • Publication number: 20150061428
    Abstract: An axial gap-type power generator in an embodiment includes a rotor provided with a magnet and a stator provided with a coil, the rotor and the stator being arranged via a gap in an axial direction of a rotation shaft. Further, a blade is installed at the rotor and the blade generates a cooling wind by rotation of the rotor. Here, the blade is installed at the rotor so that the cooling wind flows through the gap between the rotor and the stator from an inside to an outside in a radial direction of the rotation shaft.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 5, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomohiko JIMBO, Kei Matsuoka, Yasuo Kabata, Asako Inomata, Yoshihiro Taniyama
  • Patent number: 8941281
    Abstract: According to an embodiment, radially extending inner spacers are provided in a stator core at a distance from each other in the circumferential direction at intervals between a prescribed number of stacked magnetic steel plates, and ventilation ducts for cooling gas flow are formed in the radial direction. The perimeter of each ventilation duct is defined by the inner spacers and a magnetic steel plate separated by the inner spacers. The cooling gas, which flows in the rotation direction, is split laterally to both sides of a rotor coil and directed toward the outer circumference. Portions of the shoulder parts of a wedge are cut off such that the width of the shoulder parts of the wedge at positions corresponding to the ventilation ducts matches the slot width.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: January 27, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuo Kabata, Masafumi Fujita, Koji Matsuyama, Yuuichiro Gunji
  • Publication number: 20140175802
    Abstract: According to one embodiment, there is provided a wind power generation apparatus including a rotor unit including blades configured to convert wind energy into a rotary motion, and an electric generator configured to convert the rotary motion energy of the rotor unit into power includes a water cooling pipe arranged between a lower stator coil and an upper stator coil which constitute a stator coil attached to a slot groove of a stator of the electric generator, and a water cooler configured to supply cooling water into the water cooling pipe and remove heat generated in the stator coil.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiro TANIYAMA, Yasuo KABATA, Masanori ARATA, Takashi UEDA
  • Patent number: 8333006
    Abstract: A method for removing a crack in an electromechanical rotor, including: forming a plurality of slots on a periphery of a core portion of an electromechanical rotor along an axial direction thereof; inserting coils into the slots, respectively; forming a plurality of wedges for maintaining the coils in the slots, respectively; and forming a cut hole at at least a part of the core portion from an outer surface of the core portion toward the side of a center axis thereof so as to contain a crack along a circumferential direction thereof.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: December 18, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Matsuyama, Hideki Chiba, Hiromichi Ito, Yomei Yoshioka, Kazuhiro Saito, Yasuo Kabata, Ryoji Nagano, Hiroaki Koinuma, Kaname Hirai, Toshio Kitajima
  • Patent number: 8222778
    Abstract: According to one embodiment, in a high-voltage bushing of a rotating electric machine, the communicating holes are inclined at least toward a circumferential direction of the hollow conductor or toward a machine external side from a direction vertical to a wall surface of the hollow conductor.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: July 17, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuo Kabata, Yoshihiro Taniyama, Junichi Uematsu, Mikio Kakiuchi, Takashi Ueda
  • 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
  • Patent number: 8076805
    Abstract: A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: December 13, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuo Kabata, Masafumi Fujita, Mikio Takabatake, Hitoshi Katayama, Mikio Kakiuchi, Koji Matsuyama, Yoshiyuki Shimoda
  • Publication number: 20110215661
    Abstract: According to an embodiment, radially extending inner spacers are provided in a stator core at a distance from each other in the circumferential direction at intervals between a prescribed number of stacked magnetic steel plates, and ventilation ducts for cooling gas flow are formed in the radial direction. The perimeter of each ventilation duct is defined by the inner spacers and a magnetic steel plate separated by the inner spacers. The cooling gas, which flows in the rotation direction, is split laterally to both sides of a rotor coil and directed toward the outer circumference. Portions of the shoulder parts of a wedge are cut off such that the width of the shoulder parts of the wedge at positions corresponding to the ventilation ducts matches the slot width.
    Type: Application
    Filed: May 19, 2011
    Publication date: September 8, 2011
    Inventors: Yasuo KABATA, Masafumi Fujita, Koji Matsuyama, Yuuichiro Gunji
  • Patent number: 7893575
    Abstract: The depth from the open end of a rotor slot closest to a magnetic pole of a rotary core to a slot bottom or the bottom of a subslot provided as a coolant ventilation path on a rotor slot bottom is made less than the depth of slots at and after a second slot counted from the magnetic pole side in the direction of internal circumference, and when a shortest distance between the bottoms of the rotor slots opposed to each other through a magnetic pole or a shortest distance between the bottoms of the subslots is assumed to be a magnetic pole width of the slots, a magnetic pole width Wp1 of a slot closest to the magnetic pole side is set to 85% or more of a magnetic pole width Wp2 of a second slot counted from the magnetic pole side in the direction of internal circumference.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: February 22, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Mikio Kakiuchi, Masanori Arata, Takashi Ueda
  • Patent number: 7866020
    Abstract: A method for repairing a crack in an electromechanical rotor (10), including forming a plurality of slots (12) on a periphery of a core portion (11) of an electromechanical rotor (10) along an axial direction thereof; inserting coils into the slots (12), respectively; forming a plurality of wedges for maintaining the coils in the slots (12), respectively; and forming a cut hole (20) at the core portion (11) from an outer surface of the core portion (11) so as to remove at least a deeper area of a crack created at the core portion (11) at a contacting surface between the corresponding wedge and the corresponding slot (12).
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: January 11, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Matsuyama, Hideki Chiba, Hiromichi Ito, Yomei Yoshioka, Kazuhiro Saito, Yasuo Kabata, Ryoji Nagano, Hiroaki Koinuma, Kaname Hirai, Toshio Kitajima
  • Publication number: 20100270875
    Abstract: According to one embodiment, in a high-voltage bushing of a rotating electric machine, the communicating holes are inclined at least toward a circumferential direction of the hollow conductor or toward a machine external side from a direction vertical to a wall surface of the hollow conductor.
    Type: Application
    Filed: April 23, 2010
    Publication date: October 28, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuo Kabata, Yoshihiro Taniyama, Junichi Uematsu, Mikio Kakiuchi, Takashi Ueda
  • Patent number: 7812501
    Abstract: It is an object of this invention to provide a dynamo-electric machine rotor which effectively and uniformly cools a rotor coil outside a rotor core by forming a ventilating groove in the rotor coil, tolerates large field current, and has high reliability.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: October 12, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Taniyama, Yasuo Kabata, Hidekazu Shiomi, Kenmei Shimanuki, Takaharu Tani, Shozo Abe
  • 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
  • Patent number: 7602089
    Abstract: A rotary electric machine includes: a stator, a rotor and rotor fans contained in a closed type frame. The cooling gas is circulated in the frame by the rotor fans and warmed as a result of heat exchange with the stator and the rotor is cooled by a gas cooler. A heat pump is adapted to use cooling water or ambient air as high temperature heat source and liquid coolant as low temperature heat source. A liquid coolant circulation system for supplying liquid coolant to the heat exchange section of the gas cooler is provided. The liquid coolant is cooled by the heat pump and is supplied to the heat exchange section of the gas cooler by means of the coolant circulation system.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: October 13, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuo Kabata, Katsuya Yamashita, Yoshihiro Taniyama, Tadashi Tokumasu, Mikio Kakiuchi, Koji Matsuyama
  • Patent number: 7592732
    Abstract: Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: September 22, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Masanori Arata, Mikio Kakiuchi, Susumu Nagano
  • Patent number: 7579739
    Abstract: Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: August 25, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masafumi Fujita, Tadashi Tokumasu, Yasuo Kabata, Masanori Arata, Mikio Kakiuchi, Susumu Nagano
  • Publication number: 20080296989
    Abstract: The depth from the open end of a rotor slot closest to a magnetic pole of a rotary core to a slot bottom or the bottom of a subslot provided as a coolant ventilation path on a rotor slot bottom is made less than the depth of slots at and after a second slot counted from the magnetic pole side in the direction of internal circumference, and when a shortest distance between the bottoms of the rotor slots opposed to each other through a magnetic pole or a shortest distance between the bottoms of the subslots is assumed to be a magnetic pole width of the slots, a magnetic pole width Wp1 of a slot closest to the magnetic pole side is set to 85% or more of a magnetic pole width Wp2 of a second slot counted from the magnetic pole side in the direction of internal circumference.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Inventors: Masafumi FUJITA, Tadashi Tokumasu, Yasuo Kabata, Mikio Kakiuchi, Masanori Arata, Takashi Ueda