Patents by Inventor Mitsunori Sezaki

Mitsunori Sezaki 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).

  • Forced cooling rotary electric machine
    Patent number: 8049378
    Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: November 1, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
  • FORCED COOLING ROTARY ELECTRIC MACHINE
    Publication number: 20110101801
    Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.
    Type: Application
    Filed: January 19, 2011
    Publication date: May 5, 2011
    Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
  • Forced cooling rotary electric machine
    Patent number: 7898128
    Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: March 1, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kenichi Hattori, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata
  • FORCED COOLING ROTARY ELECTRIC MACHINE
    Publication number: 20080169710
    Abstract: The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 17, 2008
    Inventors: Kenichi HATTORI, Tadaaki Kakimoto, Akitomi Semba, Mitsuru Saeki, Mitsunori Sezaki, Takashi Shibata