Patents by Inventor Natsuko TAKEUCHI

Natsuko TAKEUCHI 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).

  • Short-circuit detector and power converter
    Patent number: 11955791
    Abstract: A short-circuit detector includes: a first Rogowski coil configured to generate a first detection signal in accordance with a current that flows through a first arm due to a short circuit in a load; a second Rogowski coil configured to generate a second detection signal in accordance with a current that flows through the first arm due to a short circuit in the first arm or a second arm; a load short-circuit detection circuit configured to detect the short circuit in the load, based on the first detection signal; an arm short-circuit detection circuit configured to detect the short circuit in the first arm or the second arm, based on the second detection signal; and a short-circuit detection circuit configured to detect a short-circuit, based on: an output signal output from the load short-circuit detection circuit; and an output signal output from the arm short-circuit detection circuit.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: April 9, 2024
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Natsuko Takeuchi, Kunio Matsubara, Hiromu Takubo
  • SHORT-CIRCUIT DETECTOR AND POWER CONVERTER
    Publication number: 20220190590
    Abstract: A short-circuit detector includes: a first Rogowski coil configured to generate a first detection signal in accordance with a current that flows through a first arm due to a short circuit in a load; a second Rogowski coil configured to generate a second detection signal in accordance with a current that flows through the first arm due to a short circuit in the first arm or a second arm; a load short-circuit detection circuit configured to detect the short circuit in the load, based on the first detection signal; an arm short-circuit detection circuit configured to detect the short circuit in the first arm or the second arm, based on the second detection signal; and a short-circuit detection circuit configured to detect a short-circuit, based on: an output signal output from the load short-circuit detection circuit; and an output signal output from the arm short-circuit detection circuit.
    Type: Application
    Filed: February 25, 2022
    Publication date: June 16, 2022
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Natsuko TAKEUCHI, Kunio MATSUBARA, Hiromu TAKUBO