Patents by Inventor Katsuya Hirata

Katsuya Hirata 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: 11183898
    Abstract: Provided is a rotary electric machine that achieves high motor efficiency with little loss. This rotary electric machine is equipped with: a stator core arranged opposing the circumferential surface of a rotor, and in which multiple slots, wherein openings opening toward the rotor are formed, are formed in the circumferential direction; and coils inserted into the slots. A mixture of a soft magnetic powder and a resin material is formed in the openings of the slots, and the relative permeability of the mixture is 5-35.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: November 23, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Genzo Iwaki, Kazuo Nishihama, Katsuya Hirata, Atsushi Abe
  • Publication number: 20190207460
    Abstract: Please substitute the new Abstract submitted herewith for the original Abstract: Provided is a rotary electric machine that achieves high motor efficiency with little loss. This rotary electric machine is equipped with: a stator core arranged opposing the circumferential surface of a rotor, and in which multiple slots, wherein openings opening toward the rotor are formed, are formed in the circumferential direction; and coils inserted into the slots. A mixture of a soft magnetic powder and a resin material is formed in the openings of the slots, and the relative permeability of the mixture is 5-35.
    Type: Application
    Filed: July 7, 2017
    Publication date: July 4, 2019
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Genzo IWAKI, Kazuo NISHIHAMA, Katsuya HIRATA, Atsushi ABE
  • Patent number: 8034496
    Abstract: The present invention provides a highly efficient fuel cell having a fuel reformer which can efficiently recover the exhaust heat from fuel cell stacks and can realize high conversion. In a fuel cell (1), a large number of power generating cells (7) are laminated to constitute a fuel cell stack (3). At least four fuel cell stacks (3) are squarely-arranged in a plane direction in a housing (2). A fuel reformer (30) filled with a reforming catalyst (33) is arranged in a cross shape in between the mutually facing sides of the fuel cell stacks (3).
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: October 11, 2011
    Assignees: Mitsubishi Materials Corporation, The Kansai Electric Power Co., Inc.
    Inventor: Katsuya Hirata
  • Patent number: 8021794
    Abstract: A fuel cell has a high heat recovery efficiency for effectively collecting heat discharged from a fuel cell stack. The fuel cell includes a power generating cell and a separator which are alternately laminated to constitute a fuel cell stack. The fuel cell stacks are disposed in the central area of a power generating reaction chamber to form two columns-by-two rows array in a plan view. A cross-shaped fuel reformer is arranged between the opposing sides of the fuel cell stacks.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: September 20, 2011
    Assignees: Mitsubishi Materials Corporation, The Kansai Electric Power Co., Inc.
    Inventors: Katsuya Hirata, Taner Akbay, Takashi Miyazawa, Naoya Murakami
  • Publication number: 20090233130
    Abstract: The present invention provides a fuel cell having a high heat recovery efficiency for effectively collecting heat discharged from a fuel cell stack. The fuel cell (1) includes a power generating cell (7) and a separator (10) which are alternately laminated to constitute a fuel cell stack (3). The fuel cell stacks (3) are disposed in the central area of a power generating reaction chamber (21) to form two columns-by-two rows array in a plan view. A cross-shaped fuel reformer (30) is arranged between the opposing sides of the fuel cell stacks (3).
    Type: Application
    Filed: December 4, 2006
    Publication date: September 17, 2009
    Inventors: Katsuya Hirata, Taner Akbay, Takashi Miyazawa, Naoya Murakami
  • Publication number: 20090136813
    Abstract: The present invention provides a highly efficient fuel cell having a fuel reformer which can efficiently recover the exhaust heat from fuel cell stacks and can realize high conversion. In a fuel cell (1), a large number of power generating cells (7) are laminated to constitute a fuel cell stack (3). At least four fuel cell stacks (3) are squarely-arranged in a plane direction in a housing (2). A fuel reformer (30) filled with a reforming catalyst (33) is arranged in a cross shape in between the mutually facing sides of the fuel cell stacks (3).
    Type: Application
    Filed: November 1, 2006
    Publication date: May 28, 2009
    Inventor: Katsuya Hirata
  • Publication number: 20090130533
    Abstract: The present invention provides a highly-efficient fuel cell having a uniform temperature in the pile direction of the fuel cell stacks piled in the vertical direction. In order to achieve the object, the fuel cell (1) includes a plurality of power generating cells (7) and separators (10) which are alternately layered and fixed on a mounting base (18) to constitute a fuel cell stack (3). A plurality of the fuel cell stacks (3) are piled at least in the height direction at the center of a generation reaction chamber (21). A fuel reformer (30) is arranged in the height direction in the vicinity of the fuel cell stacks (3). An introduction pipe (34) of a non-reformed fuel gas is connected to the upper end of the fuel reformer (30) and a discharge pipe (32) of the reformed fuel gas is connected to the lower end.
    Type: Application
    Filed: December 4, 2006
    Publication date: May 21, 2009
    Inventors: Katsuya Hirata, Takashi Miyazawa, Naoya Murakami, Norihisa Chitose