Patents by Inventor Tomofumi Kobayashi

Tomofumi Kobayashi 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).

  • Publication number: 20230320052
    Abstract: An electronic component package includes a base tape including recesses. On an inner surface of each of the recesses, a protrusion that can abut an electronic component inside of the recess is provided. The electronic component includes a multilayer body having a parallelepiped or substantially parallelepiped shape and an external electrode on each of two end surfaces of the multilayer body.
    Type: Application
    Filed: March 7, 2023
    Publication date: October 5, 2023
    Inventor: Tomofumi KOBAYASHI
  • Patent number: 10644623
    Abstract: Based on an output signal, among a plurality of switching elements, an element control part outputs a PWM signal having a maximum duty ratio to a pair of switching elements that drive a first coil among a plurality of coils to a high level, outputs a PWM signal having a minimum duty ratio to a pair of switching elements that are connected to each other in series and that drive a second coil among the plurality of coils to a low level, and outputs a PWM signal having a medium duty ratio between the maximum duty ratio of the PWM signal and the minimum duty ratio of the PWM signal to a pair of switching elements that are connected to each other in series and that drive a third coil among the plurality of coils.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: May 5, 2020
    Assignee: Mitsuba Corporation
    Inventors: Tamotsu Iwazaki, Toru Furusawa, Takashi Hoshino, Tomofumi Kobayashi
  • Patent number: 10594233
    Abstract: A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: March 17, 2020
    Assignee: Mitsuba Corporation
    Inventors: Tomohiko Annaka, Hiroto Tanaka, Naoki Kojima, Toru Furusawa, Tomofumi Kobayashi
  • Patent number: 10469004
    Abstract: A motor drive apparatus includes: a stage determination part that determines a position of the rotor based on a combination of states of a plurality of the output signals; and a power distribution timing determination part which determines that a power distribution timing when power is distributed to the coil is a timing obtained by advancing an angle by an amount that corresponds to a predetermined electric angle in a startup time of the motor, wherein, when a rotation speed of the motor becomes a predetermined rotation speed or more, the power distribution timing determination part determines that a timing when a predetermined period of time elapses since a position of the rotor arrives at a position of an electric angle that corresponds to a displacement amount of an electric angle which is arbitrarily advanced with respect to a predetermined electric angle that is advanced in the startup time is a power distribution timing.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: November 5, 2019
    Assignee: Mitsuba Corporation
    Inventors: Naoki Kojima, Tomofumi Kobayashi, Atsushi Kawasaki
  • Publication number: 20180358912
    Abstract: Based on an output signal, among a plurality of switching elements, an element control part outputs a PWM signal having a maximum duty ratio to a pair of switching elements that drive a first coil among a plurality of coils to a high level, outputs a PWM signal having a minimum duty ratio to a pair of switching elements that are connected to each other in series and that drive a second coil among the plurality of coils to a low level, and outputs a PWM signal having a medium duty ratio between the maximum duty ratio of the PWM signal and the minimum duty ratio of the PWM signal to a pair of switching elements that are connected to each other in series and that drive a third coil among the plurality of coils.
    Type: Application
    Filed: December 1, 2016
    Publication date: December 13, 2018
    Applicants: Mitsuba Corporation, Mitsuba Corporation
    Inventors: Tamotsu Iwazaki, Toru Furusawa, Takashi Hoshino, Tomofumi Kobayashi
  • Publication number: 20180358911
    Abstract: A motor drive apparatus includes: a stage determination part that determines a position of the rotor based on a combination of states of a plurality of the output signals; and a power distribution timing determination part which determines that a power distribution timing when power is distributed to the coil is a timing obtained by advancing an angle by an amount that corresponds to a predetermined electric angle in a startup time of the motor, wherein, when a rotation speed of the motor becomes a predetermined rotation speed or more, the power distribution timing determination part determines that a timing when a predetermined period of time elapses since a position of the rotor arrives at a position of an electric angle that corresponds to a displacement amount of an electric angle which is arbitrarily advanced with respect to a predetermined electric angle that is advanced in the startup time is a power distribution timing.
    Type: Application
    Filed: February 3, 2017
    Publication date: December 13, 2018
    Inventors: Naoki Kojima, Tomofumi Kobayashi, Atsushi Kawasaki
  • Publication number: 20180323733
    Abstract: A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).
    Type: Application
    Filed: April 20, 2018
    Publication date: November 8, 2018
    Inventors: Tomohiko Annaka, Hiroto Tanaka, Naoki Kojima, Toru Furusawa, Tomofumi Kobayashi
  • Publication number: 20160322921
    Abstract: A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).
    Type: Application
    Filed: December 22, 2014
    Publication date: November 3, 2016
    Inventors: Tomohiko Annaka, Hiroto Tanaka, Naoki Kojima, Toru Furusawa, Tomofumi Kobayashi