Patents by Inventor Masakatsu Daijou

Masakatsu Daijou 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).

  • Inverter device
    Patent number: 7432616
    Abstract: In the inverter device of the invention, when a power source connected to an electrolytic capacitor 5 is interrupted, a switching control circuit 6a controls switching elements of an inverter main circuit 7a to operate to supply a current to a load, thereby discharging charges of the electrolytic capacitor 5, and an electrolytic capacitor electrostatic capacitance calculator 10a calculates the electrostatic capacitance of the electrolytic capacitor, on the basis of: a discharged charge amount which is obtained from an outflow current Ic from the electrolytic capacitor 5, and a discharge time; and a discharge voltage ?V which is a voltage drop from beginning of discharging of the electrolytic capacitor 5.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: October 7, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akira Hatai, Mahito Unno, Masakatsu Daijou, Kiyoshi Eguchi
  • Inverter
    Publication number: 20050169018
    Abstract: In the inverter device of the invention, when a power source connected to an electrolytic capacitor 5 is interrupted, a switching control circuit 6a controls switching elements of an inverter main circuit 7a to operate to supply a current to a load, thereby discharging charges of the electrolytic capacitor 5, and an electrolytic capacitor electrostatic capacitance calculator 10a calculates the electrostatic capacitance of the electrolytic capacitor, on the basis of: a discharged charge amount which is obtained from an outflow current Ic from the electrolytic capacitor 5, and a discharge time; and a discharge voltage ?V which is a voltage drop from beginning of discharging of the electrolytic capacitor 5.
    Type: Application
    Filed: March 17, 2003
    Publication date: August 4, 2005
    Inventors: Akira Hatai, Mahito Unno, Masakatsu Daijou, Kiyoshi Eguchi