Patents by Inventor Kentaro KOSEKI

Kentaro KOSEKI 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).

  • Transformer
    Patent number: 9812250
    Abstract: While the whole weight of magnetic shields provided in a tank of a transformer is reduced, eddy current loss by magnetic flux leaked from a winding is reduced. A transformer is configured using an iron core having an iron core leg and an iron core yoke, windings wound around the iron core leg, a tank having the iron core and the windings therein, and a first magnetic shield and second magnetic shields formed by laminating silicon steel sheets inside the tank. The first magnetic shield is arranged opposite to the windings, the second magnetic shields are arranged between the first magnetic shield and the tank, and the first magnetic shield and the second magnetic shields are fixed to the tank by different support members.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: November 7, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Yasunori Ono, Takahide Matsuo, Naoya Miyamoto, Taku Oyama, Kentaro Koseki, Ryoji Hirobe
  • Transformer
    Publication number: 20160086726
    Abstract: While the whole weight of magnetic shields provided in a tank of a transformer is reduced, eddy current loss by magnetic flux leaked from a winding is reduced. A transformer is configured using an iron core having an iron core leg and an iron core yoke, windings wound around the iron core leg, a tank having the iron core and the windings therein, and a first magnetic shield and second magnetic shields formed by laminating silicon steel sheets inside the tank. The first magnetic shield is arranged opposite to the windings, the second magnetic shields are arranged between the first magnetic shield and the tank, and the first magnetic shield and the second magnetic shields are fixed to the tank by different support members.
    Type: Application
    Filed: June 15, 2015
    Publication date: March 24, 2016
    Inventors: Yasunori ONO, Takahide MATSUO, Naoya MIYAMOTO, Taku OYAMA, Kentaro KOSEKI, Ryoji HIROBE