Patents by Inventor Hiroki Matsukuma

Hiroki Matsukuma 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: 20200325891
    Abstract: A CAES generator includes a plurality of motors, a plurality of compressors, a pressure accumulator, an expander, a generator, an electric-motor inverter that changes a rotation speed of each of the motors, a feed command receiver that receives input power as a feed command value before feeding the input power, and a controller. The controller includes a compressor number calculation unit that calculates a maximum number of motors that are allowed to be driven at a rating based on the feed command value, and a compressor drive control unit that drives at the rating, the motors, the number of which is the maximum number calculated by the compressor number calculation unit.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 15, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Takashi SATO, Ryo NAKAMICHI, Masaki MATSUKUMA, Hiroki SARUTA
  • Patent number: 10794278
    Abstract: The compressed air energy storage power generation device includes a third heat exchanger and fourth heat exchangers. The third heat exchanger performs heat exchange between the air exhausted from the expander and the second heating medium to cool the second heating medium. The fourth heat exchanger performs heat exchange between the second heating medium cooled by the third heat exchanger and at least one of the lubricating oil to be supplied to the compressor or the first heating medium to be supplied to the first heat exchanger to cool the lubricating oil or the first heating medium.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: October 6, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Yohei Kubo, Masatake Toshima, Hiroki Saruta, Masaki Matsukuma, Kanami Sakamoto
  • Patent number: 10746097
    Abstract: A compressed air energy storage power generation device includes a first heat exchanger, a heat storage tank, a second heat exchanger, a heating unit, a first power distributor, and a controller. The first heat exchanger performs heat exchange between the compressed air from a compressor and the heating medium. The heat storage tank stores the heating medium heatexchanged by the first heat exchanger. The second heat exchanger performs heat exchange between the compressed air from an accumulator tank and the heating medium from the heat storage tank. The first power distributor distributes the generated power of the power generator to a power system and the heating unit. When the internal pressure of the accumulator tank reaches a predetermined pressure and the generated power is larger than the power demand, the controller supplies a part or all of the generated power to the heating unit by the first power distributor.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: August 18, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Yohei Kubo, Masatake Toshima, Makoto Nishimura, Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto
  • Patent number: 10655505
    Abstract: A compressor compresses air in such a manner that a motor is driven by renewable energy. An accumulator tank stores the air thus compressed. An expander is driven by the compressed air. A generator is mechanically connected to the expander. A first heat exchanger recovers compressed heat. A heat medium tank that stores a heat medium. A second heat exchanger that heats the compressed air. A first pump adjusts an amount of the heat medium to be supplied to the first heat exchanger. A control device controls the first pump to adjust the amount of heat medium to be supplied to the first heat exchanger so as to maintain the heat medium, which is stored in the heat medium tank, at a predetermined first temperature.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: May 19, 2020
    Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto
  • Publication number: 20200153275
    Abstract: A compressed air storage power generation device 1 is provided with: a motor 11 which is driven using input electric power; a compressor 10 which is mechanically connected with the motor and compresses air; a plurality of accumulator tank groups 20A, 20B, 20C, 20D which are in fluid connection with the compressor and in which compressed air obtained by the compressor is stored; a plurality of pressure sensors 21A, 21B, 21C, 21D which are provided in the accumulator tank groups and which measure pressures of the accumulator tank groups; an expander 30 which is in fluid connection with the accumulator tank groups and driven by means of compressed air supplied from the accumulator tank groups; a generator 31 which is mechanically connected with the expander; and a control unit 40 which, on the basis of the pressures of the respective accumulator tank groups measured by means of the pressure sensors, determines the order of the accumulator tank groups in which to store compressed air for charging, and determines
    Type: Application
    Filed: April 6, 2018
    Publication date: May 14, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Masaki MATSUKUMA, Hiroki SARUTA, Yuji MATSUO, Kanami SAKAMOTO
  • Publication number: 20200083743
    Abstract: A compressed air energy storage generator includes a motor, a compressor, a pressure accumulator, an expander, a generator, an electric-motor inverter, a generator inverter, a feed command receiver, a discharge command receiver, and a controller. The controller includes a feed determination unit, a discharge determination unit, and an input and output adjustment unit, the feed determination unit being configured to determine whether a feed command value is smaller than minimum charge power, the discharge determination unit being configured to determine whether a discharge command value is smaller than minimum discharge power, the input and output adjustment unit being configured to control, when the feed determination unit determines that the feed command value is smaller than the minimum charge power or when the discharge determination unit determines that the discharge command value is smaller than the minimum discharge power, the inverters to simultaneously drive the motor and the generator.
    Type: Application
    Filed: April 10, 2018
    Publication date: March 12, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Takashi SATO, Ryo NAKAMICHI, Masaki MATSUKUMA, Hiroki SARUTA
  • Publication number: 20200063658
    Abstract: The compressed air energy storage power generation device includes a third heat exchanger and fourth heat exchangers. The third heat exchanger performs heat exchange between the air exhausted from the expander and the second heating medium to cool the second heating medium. The fourth heat exchanger performs heat exchange between the second heating medium cooled by the third heat exchanger and at least one of the lubricating oil to be supplied to the compressor or the first heating medium to be supplied to the first heat exchanger to cool the lubricating oil or the first heating medium.
    Type: Application
    Filed: February 10, 2017
    Publication date: February 27, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yohei KUBO, Masatake TOSHIMA, Hiroki SARUTA, Masaki MATSUKUMA, Kanami SAKAMOTO
  • Patent number: 10526969
    Abstract: A compressed air energy storage power generation device equipped with: a compressor mechanically connected to a motor; a first pressure storage tank storing compressed air from the compressor; an expansion device driven by compressed air from the tank; a generator mechanically connected to the expansion device; a first heat exchanger that exchanges heat between a heat medium and the compressed air supplied from the compressor to the tank; a second heat exchanger that exchanges heat between the heat medium and the compressed air supplied from the tank to the expansion device; a pressure sensor that detects the state of charge (SOC) of the tank; SOC adjustment units that adjusts the SOC; and a control device. The control device controls the SOC adjustment units such that the detected SOC is within an optimal SOC range while satisfying the requested power.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: January 7, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Sato, Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto
  • Publication number: 20190390599
    Abstract: In a compressed air energy storage and power generation device, a compressed air energy storage and power generation method defines, as a reference storage value, a storage value indicating that a storage amount of air in an accumulator tank is in a predetermined intermediate state. At the reference storage value, at least one of a motor and a generator rotates at a rated rotation speed. When a storage value indicating a current storage amount in the accumulator tank is larger than the reference storage value, at least one of the motor and the generator is controlled to rotate at equal to or less than the rated rotation speed. When the storage value indicating the current storage amount in the accumulator tank is smaller than the reference storage value, at least one of the motor and the generator is controlled to rotate at equal to or more than the rated rotation speed and equal to or less than a maximum permissible rotation speed.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Masaki MATSUKUMA, Hiroki SARUTA, Kanami SAKAMOTO
  • Patent number: 10487735
    Abstract: A compressed air energy storage power generation device equipped with: a compressor mechanically connected to a motor; a first pressure storage tank storing compressed air from the compressor; an expansion device driven by compressed air from the tank; a generator mechanically connected to the expansion device; a first heat exchanger that exchanges heat between a heat medium and the compressed air supplied from the compressor to the tank; a second heat exchanger that exchanges heat between the heat medium and the compressed air supplied from the tank to the expansion device; a pressure sensor that detects the state of charge (SOC) of the tank; SOC adjustment units that adjusts the SOC; and a control device. The control device controls the SOC adjustment units such that the detected SOC is within an optimal SOC range while satisfying the requested power.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: November 26, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Sato, Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto
  • Patent number: 10480410
    Abstract: In a compressed air energy storage and power generation device, a compressed air energy storage and power generation method defines, as a reference storage value, a storage value indicating that a storage amount of air in an accumulator tank is in a predetermined intermediate state. At the reference storage value, at least one of a motor and a generator rotates at a rated rotation speed. When a storage value indicating a current storage amount in the accumulator tank is larger than the reference storage value, at least one of the motor and the generator is controlled to rotate at equal to or less than the rated rotation speed. When the storage value indicating the current storage amount in the accumulator tank is smaller than the reference storage value, at least one of the motor and the generator is controlled to rotate at equal to or more than the rated rotation speed and equal to or less than a maximum permissible rotation speed.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: November 19, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto
  • Patent number: 10358975
    Abstract: A compressed air energy storage and power generation device comprises a motor, a compressor, a pressure accumulation tank, an expander, and a generator. The motor is driven by a fluctuating input power. The compressor is mechanically connected to the motor and compresses air. The pressure accumulation tank is fluidly connected to the compressor and stores air compressed by the compressor. The expander is fluidly connected to the pressure accumulation tank and is driven by compressed air supplied from the pressure accumulation tank. The generator is mechanically connected to the expander and generates power to be supplied to a user. A cooling water flow path, whereby water flows inside a cooling water pipe for cooling air that is a working fluid, is provided inside a casing of the compressor. As a result, a compressed air energy storage and power generation device can be provided that is capable of efficiently reducing compressive axial force and of reducing power consumption.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: July 23, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Masaki Matsukuma, Kanami Sakamoto, Hiroki Saruta, Masatake Toshima, Yohei Kubo
  • Patent number: 10352310
    Abstract: A compressed air storage and power generation device (1) is provided with motors (3a-3c), compressors (4a-4c), compressed air storage tanks (5a-5c), injection-side valves (6a-6e), expanders (7a-7c), discharge-side valves (8a-8e), generators (9a-9c), an output sensor (10), pressure sensors (11a-11c), and a control device (12). The control device (12) uses a tank (5c) with a relatively large capacity for long-period variable power and uses tanks (5a, 5b) with relatively low capacities for short-period variable power, all such power having been generated using natural energy, and thereby performs control by which both the long-period and short-period variable power are leveled out and power is output according to the power demand. The compressed air storage power generation device (1) levels out both the long-period and short-period variable power and outputs the power according to the power demand.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: July 16, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kanami Sakamoto, Hiroki Saruta, Masaki Matsukuma
  • Patent number: 10344628
    Abstract: A compressed air energy storage power generation device 2 includes a compressor, a pressure accumulator tank, and an expander. The compressor compresses air by being driven with renewable energy. The pressure accumulator tank stores the air compressed by the compressor. The expander is driven by the compressed air. A power generator is mechanically connected to the expander and generates electric power, which is to be supplied to a demander.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 9, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Yohei Kubo, Masatake Toshima, Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto
  • Patent number: 10330008
    Abstract: A compressed-air storage and power generation method according to the present invention is provided with: a first air-compression step; a first air-storage step; a first air-supply step; a first power-generation step; a first heat-exchange step; a heat-medium storage step; a second heat-exchange step; and an air-discharge step. In the air-discharge step, when the amount of compressed air stored in a pressure-accumulation tank (12) exceeds a prescribed amount in the first air-storage step, the air compressed by a first compressor (10) is discharged outside without being stored in the pressure-accumulation tank (12). Therefore, it is possible to provide a compressed-air storage and power generation method by which fluctuating electrical power can be smoothed efficiently even after compressed air is stored up to the storage capacity of the storage space.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: June 25, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Masaki Matsukuma, Hiroki Saruta, Kanami Sakamoto, Masatake Toshima, Yohei Kubo
  • Publication number: 20190170026
    Abstract: A compressor compresses air in such a manner that a motor is driven by renewable energy. An accumulator tank stores the air thus compressed. An expander is driven by the compressed air. A generator is mechanically connected to the expander. A first heat exchanger recovers compressed heat. A heat medium tank that stores a heat medium. A second heat exchanger that heats the compressed air. A first pump adjusts an amount of the heat medium to be supplied to the first heat exchanger. A control device controls the first pump to adjust the amount of heat medium to be supplied to the first heat exchanger so as to maintain the heat medium, which is stored in the heat medium tank, at a predetermined first temperature.
    Type: Application
    Filed: April 27, 2016
    Publication date: June 6, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Masaki MATSUKUMA, Hiroki SARUTA, Kanami SAKAMOTO
  • Patent number: 7924533
    Abstract: A multi-channel head includes a substrate, a plurality of write elements arranged in a track width direction above the substrate in a lamination direction, and a plurality of read elements arranged in the track width direction above the plurality of write elements in the lamination direction. At least one of the plurality of write elements is offset from the others in the lamination direction. All the plurality of read elements are located higher than an uppermost one of the plurality of write elements in the lamination direction.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: April 12, 2011
    Assignees: TDK Corporation, SAE Magnetics (H.K.) Ltd.
    Inventors: Kazuhiko Maejima, Yoshiyuki Mizoguchi, Nobuya Oyama, Hiraku Hirabayashi, Hiroki Matsukuma, Naoto Matono
  • Patent number: 7724474
    Abstract: A thin-film magnetic head that shows stable read and/or write performances, maintaining the reliability over time by suppressing the wear of the head sufficiently, is provided. The head comprises: a substrate having an element-formed surface and an opposed-to-medium surface; a magnetic head element; an overcoat layer formed on the element-formed surface so as to cover the magnetic head element; a closure provided on the overcoat layer, a surface of the closure being in contact with the upper surface of the overcoat layer; and an element contact pad formed in a sliding-side surface of the head and having a contact surface including a part of the opposed-to-medium surface, a part of an end surface of the overcoat layer and a part of an end surface of the closure, one end of the magnetic head element reaching the contact surface.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: May 25, 2010
    Assignee: TDK Corporation
    Inventors: Kazuhiko Maejima, Mitsuyoshi Kawai, Hiroki Matsukuma, Katsumichi Tagami, Makoto Yoshida, Hiroshi Kamiyama
  • Patent number: 7649713
    Abstract: A thin-film magnetic head that has an improved protrusion efficiency under the condition of not only assuring the reliability of the-heating operation, but also stabilizing the read output is provided. The head comprises: a magnetic head element for writing and/or reading data signals; a heating element for generating heat at least during operations of the magnetic head element; and a first heatsink element provided adjacent to the heating element for receiving a part of the heat generated from the heating element, the first heatsink element being a distance from the magnetic head element.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: January 19, 2010
    Assignee: TDK Corporation
    Inventors: Norikazu Ota, Katsuki Kurihara, Hiraku Hirabayashi, Taro Oike, Hiroki Matsukuma
  • Patent number: 7623322
    Abstract: The present invention relates to a thin-film magnetic head with a heater. A thin-film magnetic head includes a substrate, a magnetic read head element that has a shield area and is formed on the substrate, a magnetic write head element that has a pole area and is formed on the opposite side of the substrate with respect to the magnetic read head element, an overcoat layer that covers the magnetic read head element and the magnetic write head element and is formed on the substrate, a heater that heats at least during the magnetic read head element or the magnetic write head element in operation and is formed in the overcoat layer, and a slit area that splits the shield area in a shield length direction and is made of lower thermal conductivity material than the one of the shield area.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: November 24, 2009
    Assignee: TDK Corporation
    Inventors: Tsuyoshi Umehara, Norikazu Ota, Katsumichi Tagami, Hiroki Matsukuma, Nobuya Oyama, Soji Koide, Yoshiyuki Mizoguchi, Kazuhide Yamada