Patents by Inventor Hiromi HAGIWARA

Hiromi HAGIWARA 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).

  • Patent number: 10432115
    Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: October 1, 2019
    Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Hiromi Hagiwara, Kazuo Asanuma, Hirokazu Shirakawa
  • Publication number: 20190084426
    Abstract: This motor driving control apparatus has (A) an inverter unit configured to drive a motor; (B) a separation switch configured to separate a power source from the inverter unit; and (C) a controller configured to instruct the separation switch to separate the power source from the inverter unit and control the inverter unit to perform switching according to a speed and a braking target torque, upon detecting an event that braking should be performed without passing a regenerative current to the power source from the inverter unit. By introducing the separation switch that operates as described above, it becomes possible to perform control so as to consume the power by the motor itself without passing the regenerative current to the power source such as a battery.
    Type: Application
    Filed: November 15, 2018
    Publication date: March 21, 2019
    Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato TANAKA, Yasuo HOSAKA, Hiromi HAGIWARA, Teruaki KAWAHIGASHI, Yuto KAJIYA, Taichi YANAOKA
  • Patent number: 10040508
    Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative 5 braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: August 7, 2018
    Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Yasuo Hosaka, Kazuo Asanuma, Hiromi Hagiwara, Satoru Shimizu
  • Patent number: 9896153
    Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: February 20, 2018
    Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Yasuo Hosaka, Kazuo Asanuma, Hiromi Hagiwara, Satoru Shimizu
  • Publication number: 20170247079
    Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative 5 braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.
    Type: Application
    Filed: May 16, 2017
    Publication date: August 31, 2017
    Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Yasuo Hosaka, Kazuo Asanuma, Hiromi Hagiwara, Satoru Shimizu
  • Publication number: 20170110994
    Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato TANAKA, Hiromi Hagiwara, Kazuo Asanuma, Hirokazu Shirakawa
  • Publication number: 20170110998
    Abstract: A driving control apparatus includes a controller that generates a first signal for controlling turn-on to a brushless motor, a PWM signal generator that generates a PWM signal for driving the brushless motor by continuous turn-on with a sine wave, and an inverter that supplies a driving voltage generated based on the first signal and the PWM signal for the brushless motor. The controller generates the first signal so that a turn-on section represented by the first signal continuously increases from a reference turn-on angle according to increase of a rotation speed, and the turn-on section having an angle corresponding to the continuous turn-on is kept when the rotation speed is equal to or greater than a predetermined speed. The PWM signal generator outputs the PWM signal in a range including a rotation speed at which the turn-on section begins to increase from the reference turn-on angle and more.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Applicants: MICROSPACE CORPORATIOIN, TAIYO YUDEN CO., LTD.
    Inventors: Masato TANAKA, Hiromi Hagiwara, Kazuo Asanuma, Hirokazu Shirakawa
  • Publication number: 20160121963
    Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.
    Type: Application
    Filed: June 13, 2014
    Publication date: May 5, 2016
    Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato TANAKA, Yasuo HOSAKA, Kazuo ASANUMA, Hiromi HAGIWARA, Satoru SHIMIZU