Patents by Inventor Heikichi Tanno

Heikichi Tanno 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).

  • Sensorless-Brushless Motor Control Device and Electric Fluid Pump Using the Same
    Publication number: 20100244754
    Abstract: A sensorless-brushless motor control device comprises an inverter, an inverter drive circuit that drives the inverter and a current control part that controls the inverter drive circuit according to a current command from a superior control part and includes a first order lag compensating part. The device is characterized by further comprising a control mode changeover judging part that judges changeover of a control gain of the current control part after startup of the sensorless-brushless motor in response to a motor revolution sensing signal from the inverter drive circuit and a control mode changeover part that changes over the control gain of the current control part in response to an output of the control mode changeover judging part.
    Type: Application
    Filed: March 1, 2010
    Publication date: September 30, 2010
    Applicant: Hitachi Car Engineering Co., Ltd.
    Inventors: Katsuji Marumoto, Kiyoshi Yoshida, Heikichi Tanno, Junichi Noda, Masami Nagano