Patents by Inventor Taihei Kawasaka

Taihei Kawasaka 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).

  • MOTOR CONTROL DEVICE, BRUSHLESS DC MOTOR, ACTUATOR, AND EGR VALVE DEVICE
    Publication number: 20230223881
    Abstract: A motor control device includes: a first duty ratio computation unit to compute a first duty ratio to be used for control of a motor body portion on the basis of a target rotational position of a rotor and a rotational position of the rotor; a second duty ratio computation unit to compute a second duty ratio corresponding to an upper limit of the absolute value of the first duty ratio on the basis of a linear function including a variable corresponding to the number of rotations of the rotor; and a control signal output unit to output a control signal corresponding to the first duty ratio when the absolute value of the first duty ratio is smaller than the absolute value of the second duty ratio, and to output a control signal corresponding to the second duty ratio when it is not.
    Type: Application
    Filed: August 6, 2020
    Publication date: July 13, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryo AWAYA, Sachiko KAWASAKI, Tomokuni KATO, Taihei KAWASAKA, Naoki IMAMURA, Satoshi KAWAMURA
  • Discharge lamp lighting device
    Patent number: 6548966
    Abstract: A discharge lamp lighting device comprises a booster circuit 2 for boosting the voltage of a DC power source 1 in response to the ON-OFF operation of a switching element 2c, a startup discharge circuit 9 for performing the startup discharge of a discharge lamp 10 according to the boosted DC voltage, a voltage detection circuit 5 for detecting the boosted DC voltage, a control circuit 7b for outputting the pulse modulated by pulse width modulation to the switching element 2c, and a control circuit 7a for controlling the pulse output from the control circuit 7b to the switching element 2c to intermittently enabling or disabling the passage thereof.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: April 15, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Taihei Kawasaka, Hidehiko Kinoshita, Akihiko Iwata, Takahiro Urakabe
  • Discharge lamp lighting device
    Publication number: 20020175636
    Abstract: A discharge lamp lighting device comprises a booster circuit 2 for boosting the voltage of a DC power source 1 in response to the ON-OFF operation of a switching element 2c, a startup discharge circuit 9 for performing the startup discharge of a discharge lamp 10 according to the boosted DC voltage, a voltage detection circuit 5 for detecting the boosted DC voltage, a control circuit 7b for outputting the pulse modulated by pulse width modulation to the switching element 2c, and a control circuit 7a for controlling the pulse output from the control circuit 7b to the switching element 2c to intermittently enabling or disabling the passage thereof.
    Type: Application
    Filed: December 13, 2001
    Publication date: November 28, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Taihei Kawasaka, Hidehiko Kinoshita, Akihiko Iwata, Takahiro Urakabe