Patents by Inventor Hiromasa Masuta

Hiromasa Masuta 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 drive apparatus for brushless motor
    Patent number: 8754598
    Abstract: A motor drive apparatus that can be used to drive a wide range of brushless motors without any limit to a magnetic pole number of a rotor magnet. One rotational period T of the rotor magnet is obtained, and one period S of the sine wave drive signal according to a mathematical expression of S=T/(n/2). The one period S of the sine wave drive signal is updated at intervals of one period of the output signal from one magnetic pole detecting element among the three magnetic pole detecting elements.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: June 17, 2014
    Assignees: Canon Kabushiki Kaisha, Canon Precision Inc.
    Inventor: Hiromasa Masuta
  • Inner-rotor brushless motor
    Patent number: 8294315
    Abstract: An inner-rotor brushless motor includes a holding member configured to hold a stator core. The holding member includes a mounting surface disposed perpendicular to a shaft and brought into contact with a mating member in which the inner-rotor brushless motor is installed; bent portions integrated with the mounting surface, bent upward so as to be substantially perpendicular to the mounting surface, and configured to hold the outer circumferential surface of the stator core; and mounting flanges used for fastening the motor to the mating member. The mounting surface, the bent portions, and the mounting flanges are integrated with each other.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: October 23, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Iwasa, Hiromasa Masuta
  • MOTOR DRIVE APPARATUS FOR BRUSHLESS MOTOR
    Publication number: 20120235608
    Abstract: A motor drive apparatus that can be used to drive a wide range of brushless motors without any limit to a magnetic pole number of a rotor magnet. One rotational period T of the rotor magnet is obtained, and one period S of the sine wave drive signal according to a mathematical expression of S=T/(n/2). The one period S of the sine wave drive signal is updated at intervals of one period of the output signal from one magnetic pole detecting element among the three magnetic pole detecting elements.
    Type: Application
    Filed: March 9, 2012
    Publication date: September 20, 2012
    Applicants: CANON PRECISION INC., CANON KABUSHIKI KAISHA
    Inventor: Hiromasa MASUTA
  • INNER-ROTOR BRUSHLESS MOTOR
    Publication number: 20100084934
    Abstract: An inner-rotor brushless motor includes a holding member configured to hold a stator core. The holding member includes a mounting surface disposed perpendicular to a shaft and brought into contact with a mating member in which the inner-rotor brushless motor is installed; bent portions integrated with the mounting surface, bent upward so as to be substantially perpendicular to the mounting surface, and configured to hold the outer circumferential surface of the stator core; and mounting flanges used for fastening the motor to the mating member. The mounting surface, the bent portions, and the mounting flanges are integrated with each other.
    Type: Application
    Filed: September 29, 2009
    Publication date: April 8, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Iwasa, Hiromasa Masuta