Patents by Inventor Naoki Ohmura

Naoki Ohmura 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 with improved current detector
    Patent number: 6556458
    Abstract: An inverter device includes a DC power supply, an inversion section connected via a DC power supply line to the DC power supply to be supplied with DC voltage from the DC power supply, thereby delivering AC voltage, a current-detecting resistor connected to the DC power supply line and having both ends, and a current detector detecting current on the basis of voltage developed across both ends of the current-detecting resistor. The current detector includes a voltage-dividing resistor, connected between a level-shift power supply line having a predetermined level-shift voltage and one of the ends of the current-detecting resistor, the voltage-dividing resistor having a voltage-dividing point.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: April 29, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoki Ohmura, Kazunobu Nagai
  • Inverter device with improved current detector
    Publication number: 20020191427
    Abstract: An inverter device includes a DC power supply, an inversion section connected via a DC power supply line to the DC power supply to be supplied with DC voltage from the DC power supply, thereby delivering AC voltage, a current-detecting resistor connected to the DC power supply line and having both ends, and a current detector detecting current on the basis of voltage developed across both ends of the current-detecting resistor. The current detector includes a voltage-dividing resistor, connected between a level-shift power supply line having a predetermined level-shift voltage and one of the ends of the current-detecting resistor, the voltage-dividing resistor having a voltage-dividing point.
    Type: Application
    Filed: June 19, 2002
    Publication date: December 19, 2002
    Inventors: Naoki Ohmura, Kazunobu Nagai