Patents by Inventor Yohei IMAI

Yohei IMAI 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: 20240088797
    Abstract: An electric power converter converts electric power supplied from a power supply to an electrical load. The electric power converter includes a coil, an electrically conductive portion and a current sensor. The coil extends in an axial direction of the coil. The coil allows a current to flow through the coil. The electrically conductive portion is located at a position apart from the coil. The electrically conductive portion allows the current to flow through the electrically conductive portion. The current sensor detects the current flowing through the electrically conductive portion. The current sensor includes a first sensor element and a second sensor element, each of which detects a magnetic flux being a detected magnetic flux generated by the current flowing through the electrically conductive portion. The first sensor element and the second sensor element are disposed in a radial direction of the coil.
    Type: Application
    Filed: November 22, 2023
    Publication date: March 14, 2024
    Applicant: DENSO CORPORATION
    Inventors: Junya MATSUSHITA, Yohei Imai, Yoshihide Fukuda
  • Patent number: 11920674
    Abstract: In this shift device, in a case in which an external force has acted on a lever when an operating mechanism is causing the lever to pivot, a clutch mechanism permits rotation of a first detent plate with respect to a second detent plate, such that pivoting of the lever is permitted. Note that a restraining mechanism urges the lever toward a shift position. This enables to the restraining mechanism to urge the lever separately to the clutch mechanism, thereby enabling the degrees of freedom for setting a biasing load on the lever by the restraining mechanism to be increased.
    Type: Grant
    Filed: March 18, 2022
    Date of Patent: March 5, 2024
    Assignee: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Tomonori Hayase, Koji Imai, Tomoaki Asai, Kota Nishida, Yohei Nakano, Yosuke Murakami, Munetoshi Makimura
  • Patent number: 11916491
    Abstract: An electric power converter includes a plurality of power modules, a capacitor, a positive bus bar, and a negative bus bar. Each of the power modules includes a positive terminal and a negative terminal on a side facing the capacitor. Leading ends of the positive terminal and negative terminal are parallel to the side. The positive bus bar includes a positive/negative base plate joined to a positive/negative electrode of the capacitor and a positive/negative flange bent from the positive/negative base plate. The positive/negative flange is joined to the positive/negative terminals of the power modules. The positive flange and the negative flange extend in directions away from the capacitor.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: February 27, 2024
    Assignee: DENSO CORPORATION
    Inventors: Shingo Miyamoto, Yohei Imai
  • Publication number: 20240047981
    Abstract: Disclosed herein is a power supply device and a control method for the power supply device. The power supply device includes: a battery; an external interface electrically connected to the battery and electrically attachable to or detachable from an external device; a voltage converter provided between the battery and the external interface; a low-voltage circuit that branches from an interface connection circuit connecting the external interface and the voltage converter and is connected to a low-voltage load having a rated voltage lower than a voltage of the battery; an interrupt circuit provided in the low-voltage circuit and configured to electrically interrupt the low-voltage circuit and the interface connection circuit; and an electronic control unit configured to control operations of the voltage converter and the interrupt circuit. The electronic control unit operates the interrupt circuit when a voltage of the interface connection circuit exceeds the rated voltage of the low-voltage load.
    Type: Application
    Filed: June 20, 2023
    Publication date: February 8, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke UEO, Ryota TANABE, Yohei IMAI
  • Publication number: 20240027502
    Abstract: A current detection device detects an electric current. The current detection device includes a first conducting portion, a second conducting portion, and a current sensor. An electric current flows through the first conducting portion in a specific direction. The second conducting portion is provided at a position separated from the first conducting portion in the specific direction and through which an electric current flows in the specific direction. The current sensor detects an electric current flowing through the first conducting portion. The current sensor is located at a position aligned with the first conducting portion in an orthogonal direction orthogonal to the specific direction and separated from the second conducting portion in the specific direction. The current sensor includes a sensor element which detects a magnetic flux generated by the electric current flowing through the first conducting portion and an element protector which protects the sensor element.
    Type: Application
    Filed: October 3, 2023
    Publication date: January 25, 2024
    Applicant: DENSO CORPORATION
    Inventors: Junya MATSUSHITA, Yohei IMAI
  • Publication number: 20220190737
    Abstract: An electric power converter includes a plurality of power modules, a capacitor, a positive bus bar, and a negative bus bar. Each of the power modules includes a positive terminal and a negative terminal on a side facing the capacitor. Leading ends of the positive terminal and negative terminal are parallel to the side. The positive bus bar includes a positive/negative base plate joined to a positive/negative electrode of the capacitor and a positive/negative flange bent from the positive/negative base plate. The positive/negative flange is joined to the positive/negative terminals of the power modules. The positive flange and the negative flange extend in directions away from the capacitor.
    Type: Application
    Filed: March 1, 2022
    Publication date: June 16, 2022
    Applicant: DENSO CORPORATION
    Inventors: Shingo MIYAMOTO, Yohei IMAI
  • Patent number: 11223295
    Abstract: In a capacitor device for transferring power between a power source and a target component including an electronic and/or electric component, at least one capacitor is housed in a capacitor case. A busbar is drawn out from the capacitor case. The busbar electrically connects the at least one capacitor to the target component. The capacitor case includes at least first, second, and third fixture members for fixation of the capacitor case. The third fixture member is located to be separated from a virtual line connecting between a first reference point of the first fixture member and a second reference point of the second fixture member, and located to be closer to the target component than the first and second fixture members are. The busbar is located to be closer to the third fixture member than to the virtual line.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: January 11, 2022
    Assignee: DENSO CORPORATION
    Inventors: Tomohisa Sano, Daisuke Harada, Seido Araki, Yohei Imai, Kentaro Hirose
  • Patent number: 10734162
    Abstract: To provide a capacitor device capable of preventing thermal interference between a filter capacitor and a plurality of smoothing capacitors. A capacitor device provided in an energization circuit between a power source and a semiconductor module as a power supply device includes a filter capacitor for removing a noise included in a current supplied from a power input terminal, a plurality of smoothing capacitors for smoothing a voltage, and a capacitor case that houses the filter capacitor and the plurality of smoothing capacitors, and a first gap between the filter capacitor and a smoothing capacitor provided at a position closest to the filter capacitor among the plurality of smoothing capacitors is configured to be larger than a second gap between two smoothing capacitors adjacent to each other among the plurality of smoothing capacitors.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: August 4, 2020
    Assignee: DENSO CORPORATION
    Inventors: Tomohisa Sano, Kentaro Hirose, Yohei Imai, Seido Araki
  • Publication number: 20200091833
    Abstract: In a capacitor device for transferring power between a power source and a target component including an electronic and/or electric component, at least one capacitor is housed in a capacitor case. A busbar is drawn out from the capacitor case. The busbar electrically connects the at least one capacitor to the target component. The capacitor case includes at least first, second, and third fixture members for fixation of the capacitor case. The third fixture member is located to be separated from a virtual line connecting between a first reference point of the first fixture member and a second reference point of the second fixture member, and located to be closer to the target component than the first and second fixture members are. The busbar is located to be closer to the third fixture member than to the virtual line.
    Type: Application
    Filed: September 9, 2019
    Publication date: March 19, 2020
    Applicant: DENSO CORPORATION
    Inventors: Tomohisa SANO, Daisuke HARADA, Seido ARAKI, Yohei IMAI, Kentaro HIROSE
  • Publication number: 20200020485
    Abstract: To provide a capacitor device capable of preventing thermal interference between a filter capacitor and a plurality of smoothing capacitors. A capacitor device provided in an energization circuit between a power source and a semiconductor module as a power supply device includes a filter capacitor for removing a noise included in a current supplied from a power input terminal, a plurality of smoothing capacitors for smoothing a voltage, and a capacitor case that houses the filter capacitor and the plurality of smoothing capacitors, and a first gap between the filter capacitor and a smoothing capacitor provided at a position closest to the filter capacitor among the plurality of smoothing capacitors is configured to be larger than a second gap between two smoothing capacitors adjacent to each other among the plurality of smoothing capacitors.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 16, 2020
    Applicant: DENSO CORPORATION
    Inventors: Tomohisa SANO, Kentaro HIROSE, Yohei IMAI, Seido ARAKI
  • Patent number: 9545848
    Abstract: A power converter includes a capacitor, a case, and a filler. The case houses the capacitor and includes a metal plate and a partition wall. The filler is interposed between the case and the capacitor. The metal plate is positioned between the capacitor and another electronic component, inside the power converter. Also, the partition wall separates the capacitor from the metal plate.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: January 17, 2017
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYODA IRON WORKS CO., LTD.
    Inventors: Yohei Imai, Takashi Hamatani, Kunihiro Iwata
  • Publication number: 20140111003
    Abstract: A power converter includes a capacitor, a case, and a filler. The case houses the capacitor and includes a metal plate and a partition wall. The filler is interposed between the case and the capacitor. The metal plate is positioned between the capacitor and another electronic component, inside the power converter. Also, the partition wall separates the capacitor from the metal plate.
    Type: Application
    Filed: October 8, 2013
    Publication date: April 24, 2014
    Applicants: TOYODA IRON WORKS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei IMAI, Takashi HAMATANI, Kunihiro IWATA