Patents by Inventor Taichi Kitamura

Taichi Kitamura 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: 11323004
    Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the iron core. A flow path through which a heat exchange medium is supplied and discharged is formed in the iron core along an axial direction thereof.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: May 3, 2022
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kenji Kitada
  • Publication number: 20220006402
    Abstract: A drive unit attached to a mobile entity is disclosed. The drive unit includes a motor, a first detector, and a controller. The first detector detects vehicle speed information regarding a vehicle speed of the mobile entity. The controller performs PWM control for the motor. The controller controls a duty cycle of a PWM signal in accordance with the vehicle speed information detected by the first detector.
    Type: Application
    Filed: June 2, 2021
    Publication date: January 6, 2022
    Inventors: Junichi ITO, Hitoshi KATSURA, Taichi KITAMURA, Chika BABA
  • Patent number: 11183911
    Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: November 23, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kenji Kitada
  • Patent number: 11146138
    Abstract: A rotating electrical machine of a brushless wound field type disposed between a stationary case and rotating member that rotates inside the case includes a stator held by the case, including an AC coil that generates a rotating magnetic field with an alternating current, a field core held by the case, the field core including a field coil that generates a magnetic flux with a direct current, a rotor fixed in contact with an outer circumferential surface of the rotating member and held rotatably relative to the stator and field coil, a rotor side core portion that is a part of the rotating member. The magnetic flux of the field coil passes from the field core through the rotor via the second air gap, the stator and rotor via the first air gap, the rotor side core portion, and the field core via the third air gap.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: October 12, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Patent number: 11133732
    Abstract: A brushless winding field rotational electric machine positioned between a starting device and a case enclosing the starting device includes: a stator, which is held to the case, including an alternating-current coil configured to generate a rotation magnetic field by alternating current; a field core, which is held to the case, including a field coil to be excited by direct current; and a rotor disposed on an outer periphery of the starting device and rotatably held about a rotational axis relative to the stator and the field coil. The rotor includes a connection portion to be connected to a synchronized rotation member configured to rotate in synchronization with an engine along the rotational axis, on a facing surface to the synchronized rotation member.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: September 28, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Patent number: 11124056
    Abstract: A vehicle drive apparatus includes a fluid coupling connected to an engine, and a rotating electric machine connected to the engine via the fluid coupling. The fluid coupling has an impeller to which torque having been output from the engine is input, and a turbine facing the impeller. The impeller rotates about a rotation axis. Torque having been output from the impeller is input to the turbine via a fluid. The turbine rotates about the rotation axis. The vehicle drive apparatus has a path provided between an output shaft of the engine and the impeller, the path through which torque having been output from the engine is transmitted to the impeller not via the turbine, and paths through which torque having been input to the impeller is output via the rotating electric machine, passing through a radially outside relative to the impeller with respect to the rotation axis from the impeller via the turbine.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: September 21, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Yuuki Kawahara, Kenji Kitada, Taichi Kitamura, Kohsuke Murata
  • Publication number: 20210213993
    Abstract: A drive unit includes a support frame, a drive wheel and a prime mover. The support frame is disposed to be pivotable about a pivot axis. The drive wheel is supported by the support frame. The prime mover is supported by the support frame. The prime mover drives the drive wheel. The support frame and at least one member form a pivot unit. The at least one member pivots together with the support frame. The pivot unit has a center of gravity disposed on the opposite side of the pivot axis with respect to the drive wheel.
    Type: Application
    Filed: December 10, 2020
    Publication date: July 15, 2021
    Inventors: Hitoshi KATSURA, Taichi KITAMURA, Chika BABA
  • Publication number: 20210213991
    Abstract: A drive unit includes a drive wheel, a prime mover, a coupling mechanism and a support frame. The coupling mechanism includes first and second coupling members. The first coupling member includes a first opposed surface. The second coupling member includes a second opposed surface opposed to the first opposed surface. The second coupling member is attached to the first coupling member in a detachable manner. The support frame is attached to the coupling mechanism. The support frame supports the drive wheel and the prime mover. The first coupling member includes a first vertical groove and a first transverse groove on the first opposed surface. The second coupling member includes a second vertical groove and a second transverse groove on the second opposed surface. The second vertical groove is opposed to the first vertical groove. The second transverse groove is opposed to the first transverse groove.
    Type: Application
    Filed: December 10, 2020
    Publication date: July 15, 2021
    Inventors: Hitoshi KATSURA, Taichi KITAMURA, Chika BABA
  • Patent number: 11050331
    Abstract: A brushless winding field rotational electric machine includes: a stator, held to a case, including an alternating-current coil configured to generate a rotation magnetic field by alternating current; a field core, held to the case, including a field coil to be excited by direct current; and a rotor on an outer periphery of a rotation member and rotatably held about a rotational axis relative to the stator and field coil. The field coil includes a plurality of coil winding layers stacked in a radial direction of the rotational axis. A cross-sectional area along an axial direction of the rotational axis, of a coil winding layer closest to the rotational axis in the radial direction of the rotational axis is smaller than a cross-sectional area along the axial direction of the rotational axis, of a coil winding layer farthest from the rotational axis in the radial direction of the rotational axis.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: June 29, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Patent number: 11000432
    Abstract: A moving device adapted to be actuated by a prime mover is disclosed. The moving device allows a caregiver to ride thereon. The moving device comprises a vehicle body and a plurality of rotors. The vehicle body includes a first frame portion and a second frame portion. The first frame portion allows the caregiver to ride thereon and the second frame portion allows a care receiver to ride thereon. The plurality of rotors are provided on the first frame portion and are rotatable in accordance with movement of the vehicle body. A wheel base defined by the plurality of rotors is constant. The second frame portion is provided on the first frame portion so as to be movable in accordance with a motion of the caregiver riding on and getting off the first frame portion.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: May 11, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Kazuhito Maeda, Taichi Kitamura, Chika Baba
  • Patent number: 10985638
    Abstract: A rotary electrical machine includes a stator, a field core, a rotor, and first and second air gaps. The stator includes an AC coil that generates a rotating magnetic field with an alternating current. The field core includes a field coil excited by a direct current. The rotor is disposed on an outer circumference of a starting apparatus and held rotatably about a rotational axis relative to the stator and the field coil. The first air gap is formed between the stator and the rotor, and allows a magnetic flux to flow therebetween. The second air gap is formed between the field core and the rotor, and allows a magnetic flux to flow therebetween. The second air gap defines an interval extending along a direction that intersects an axial direction of the rotational axis on one end surface of the rotor in the axial direction of the rotational axis.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: April 20, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Kohsuke Murata, Taichi Kitamura
  • Publication number: 20210070161
    Abstract: A vehicle drive apparatus includes a fluid coupling connected to an engine, and a rotating electric machine connected to the engine via the fluid coupling. The fluid coupling has an impeller to which torque having been output from the engine is input, and a turbine facing the impeller. The impeller rotates about a rotation axis. Torque having been output from the impeller is input to the turbine via a fluid. The turbine rotates about the rotation axis. The vehicle drive apparatus has a path provided between an output shaft of the engine and the impeller, the path through which torque having been output from the engine is transmitted to the impeller not via the turbine, and paths through which torque having been input to the impeller is output via the rotating electric machine, passing through a radially outside relative to the impeller with respect to the rotation axis from the impeller via the turbine.
    Type: Application
    Filed: September 8, 2020
    Publication date: March 11, 2021
    Inventors: Yuuki KAWAHARA, Kenji KITADA, Taichi KITAMURA, Kohsuke MURATA
  • Patent number: 10931221
    Abstract: A rotational electric machine includes a stator configured to generate a rotation magnetic field in response to alternating current; a rotor configured to rotate in response to the rotation magnetic field; a field coil configured to excite the rotor in response to direct current; an acquisition unit configured to acquire manipulation information related to a torque generated by or caused to be generated by the rotor and a rotational state of the rotor; and a motor characteristic control unit configured to control the direct current based on the manipulation information and the rotational state acquired by the acquisition unit to control a motor characteristic.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: February 23, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Patent number: 10923970
    Abstract: A brushless winding field type rotary electric machine between a starting device and a stationary case, having a stator held in the case and internally equipped with an AC coil generating a rotating magnetic field by an AC current; a field core held in the case and internally equipped with a field coil excited by a DC current; a rotor disposed around the starting device outer periphery and rotatable with respect to the stator and the field coil; a first air gap formed between the stator and the rotor, delivering a magnetic flux between the two; a second air gap formed between the field core and the rotor, delivering a magnetic flux between the two. The second air gap has an inclined section inclined with respect to a rotation shaft axial direction so that the rotor radially outer portion is positioned on the radially outer side than the field core.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: February 16, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Patent number: 10886799
    Abstract: A rotary electric machine includes a stator, a rotor, and a field coil; the rotor includes a first magnetic pole having a first annular portion and a plurality of claw portions and a second magnetic pole having a second annular portion and a plurality of projection portions; in the rotor, the claw portions and the projection portions are circumferentially alternately positioned, and the first magnetic pole and the second magnetic pole are maintained in a non-contact state by providing a radial gap, a circumferential gap, and an axial gap between the first magnetic pole and the second magnetic pole; and the gap arrangement member has an axial positioning portion that is axially locked with respect to at least one of the first magnetic pole and the second magnetic pole, and axially positions the first magnetic pole and the second magnetic pole.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: January 5, 2021
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Publication number: 20200366155
    Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the iron core. A flow path through which a heat exchange medium is supplied and discharged is formed in the iron core along an axial direction thereof.
    Type: Application
    Filed: April 15, 2020
    Publication date: November 19, 2020
    Inventors: Hitoshi KATSURA, Taichi KITAMURA, Kenji KITADA
  • Publication number: 20200366175
    Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.
    Type: Application
    Filed: April 15, 2020
    Publication date: November 19, 2020
    Inventors: Hitoshi KATSURA, Taichi KITAMURA, Kenji KITADA
  • Publication number: 20200366139
    Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor has, at a portion facing the stator, different radial dimensions with respect to a rotary shaft of the rotor between a one end of the rotor in an extending direction of the rotary shaft and a portion different from the one end in the extending direction.
    Type: Application
    Filed: April 15, 2020
    Publication date: November 19, 2020
    Inventors: Hitoshi KATSURA, Taichi KITAMURA, Kenji KITADA
  • Patent number: 10840786
    Abstract: A brushless winding field type rotary electric machine equipped with a stator, a field core having a field coil, and a rotor. The field coil is in parallel with the rotor in the rotary member rotation shaft axial direction. The rotor has first and second magnetic poles respectively having first and second annular sections and first and second pawl sections, and an annular-shaped rotor core having first and second fitting sections into which the first and second pawl sections are respectively fitted, the first and second fitting sections being provided alternately along the circumferential direction, and the rotor core having through hollow sections each disposed between the first and second fitting sections. The first magnetic pole and the second magnetic pole are fixed to the rotor core without making contact with each other and the rotor core is constituted by stacking electromagnetic steel sheets in the axial direction.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: November 17, 2020
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Taichi Kitamura, Kimitaka Uemura
  • Patent number: 10788110
    Abstract: A hybrid driving apparatus includes a forward-reverse switching mechanism, a transmission, an input path disposed on an output side of the forward-reverse switching mechanism, and a motor connected to the input path.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: September 29, 2020
    Assignee: EXEDY CORPORATION
    Inventors: Hitoshi Katsura, Kohsuke Murata, Taichi Kitamura