Patents by Inventor Hiromu Sekiguchi

Hiromu Sekiguchi 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).

  • Transport apparatus and control method
    Patent number: 11671045
    Abstract: A transport apparatus includes an electric motor having a mover and coils, and a control device that controls the electric motor and includes a measuring unit and a control unit. The coils drives the mover by applying a current to each of the coils. The measuring unit measures an impedance of each coil. The control unit controls the current flowing through each of the coils based on a third current command value in which a first current command value, indicating a current corresponding to a thrust command value indicating a thrust applied to the mover, and a second current command value, indicating a current for measuring the impedance, are superimposed. The control unit determines the second current command value such that the mover does not receive a thrust due to a component corresponding to the second current command value in the current flowing through each coil when measuring the impedance.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: June 6, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiromu Sekiguchi
  • TRANSPORT APPARATUS AND CONTROL METHOD
    Publication number: 20220038039
    Abstract: A transport apparatus includes an electric motor having a mover and coils, and a control device that controls the electric motor and includes a measuring unit and a control unit. The coils drives the mover by applying a current to each of the coils. The measuring unit measures an impedance of each coil. The control unit controls the current flowing through each of the coils based on a third current command value in which a first current command value, indicating a current corresponding to a thrust command value indicating a thrust applied to the mover, and a second current command value, indicating a current for measuring the impedance, are superimposed. The control unit determines the second current command value such that the mover does not receive a thrust due to a component corresponding to the second current command value in the current flowing through each coil when measuring the impedance.
    Type: Application
    Filed: July 23, 2021
    Publication date: February 3, 2022
    Inventor: Hiromu Sekiguchi