Patents by Inventor Kosuke TSUJIKAWA

Kosuke TSUJIKAWA 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).

  • Insulation detector and electric apparatus
    Patent number: 11079444
    Abstract: An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: August 3, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taichiro Tamida, Masayuki Uematsu, Akira Tanabe, Yoshitomo Hayashi, Yoji Tsutsumishita, Kosuke Tsujikawa
  • Insulation detector and electric apparatus
    Patent number: 10416224
    Abstract: An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: September 17, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taichiro Tamida, Masayuki Uematsu, Akira Tanabe, Yoshitomo Hayashi, Yoji Tsutsumishita, Kosuke Tsujikawa
  • INSULATION DETECTOR AND ELECTRIC APPARATUS
    Publication number: 20180340971
    Abstract: An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor.
    Type: Application
    Filed: August 7, 2018
    Publication date: November 29, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taichiro TAMIDA, Masayuki UEMATSU, Akira TANABE, Yoshitomo HAYASHI, Yoji TSUTSUMISHITA, Kosuke TSUJIKAWA
  • INSULATION DETECTOR AND ELECTRIC APPARATUS
    Publication number: 20160377670
    Abstract: An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor.
    Type: Application
    Filed: October 28, 2014
    Publication date: December 29, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taichiro TAMIDA, Masayuki UEMATSU, Akira TANABE, Yoshitomo HAYASHI, Yoji TSUTSUMISHITA, Kosuke TSUJIKAWA