Patents by Inventor Makoto HASHII

Makoto HASHII 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).

  • Power converter
    Patent number: 8958224
    Abstract: A power converter can be configured of a first series circuit, formed from a first semiconductor switching element and a second semiconductor switching element connected in series to either end of a direct current voltage supply series circuit formed from a first direct current voltage supply and a second direct current voltage supply connected in series, and a second series circuit, formed from a third semiconductor switching element and a fourth semiconductor switching element connected in series between a connection point of the first direct current voltage supply and the second direct current voltage supply and a connection point of the first semiconductor switching element and the second semiconductor switching element. The first semiconductor switching element and the third semiconductor switching element can be configured of a first semiconductor device, and the second semiconductor switching element and the fourth semiconductor switching element can be configured of a second semiconductor device.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: February 17, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yasushi Abe, Makoto Hashii, Kiyoshi Takahashi
  • POWER CONVERTER
    Publication number: 20120228945
    Abstract: A power converter can be configured of a first series circuit, formed from a first semiconductor switching element and a second semiconductor switching element connected in series to either end of a direct current voltage supply series circuit formed from a first direct current voltage supply and a second direct current voltage supply connected in series, and a second series circuit, formed from a third semiconductor switching element and a fourth semiconductor switching element connected in series between a connection point of the first direct current voltage supply and the second direct current voltage supply and a connection point of the first semiconductor switching element and the second semiconductor switching element. The first semiconductor switching element and the third semiconductor switching element can be configured of a first semiconductor device, and the second semiconductor switching element and the fourth semiconductor switching element can be configured of a second semiconductor device.
    Type: Application
    Filed: March 6, 2012
    Publication date: September 13, 2012
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Yasushi ABE, Makoto HASHII, Kiyoshi TAKAHASHI