Patents Assigned to Nidec Corporation
  • Patent number: 11787470
    Abstract: A processor calculates a steering wheel torque which an input shaft receives, from a torsion bar torque applied to a torsion bar between the input shaft to which an operation by a driver is input and an output shaft to which a motor applies a drive force, and a rotation angle of the input shaft, compares a calculated steering wheel torque with a threshold value, and determines that a vehicle is in a hands-off state in which the input shaft receives no input based on the operation by the driver when determining that the calculated steering wheel torque changes from a state in which the steering wheel torque exceeds a threshold value to a state in which the steering wheel torque falls below the threshold value.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: October 17, 2023
    Assignee: NIDEC CORPORATION
    Inventor: Sohei Miyake
  • Patent number: 11789536
    Abstract: An input device includes a contact body to contact an object, a pressure sensor to detect pressure of contact of the contact body with the object, a vibrator to generate a vibration to provide a tactile sensation, and a vibration controller. The vibration of the vibrator when the pressure detected based on the output of the pressure sensor is large is larger than that when the pressure detected based on the output of the pressure sensor is small.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: October 17, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Atsunori Hirata, Tomohiro Hasegawa, Daisuke Adachi, Hiroaki Hirano, Tomohiro Kobayashi
  • Patent number: 11784531
    Abstract: An electrical discharging device electrically connects a shaft of a motor and a housing. A plate portion of the housing has an opening through which the shaft is inserted and expands in a radial direction. A cover member is disposed on the plate portion and covers the electrical discharging device. A seal member is disposed between the shaft and the plate portion in the opening. The through hole is disposed in the plate portion and/or the cover member. The electrical discharging device is accommodated in an accommodation space surrounded by the plate portion and the cover member. The accommodation space is connected to the outside through the through hole.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Takayuki Makino, Tsubasa Hirayama, Masahiro Kokubo
  • Patent number: 11781643
    Abstract: In a drive device, a first flow path of a fluid connects a gear accommodation portion and an inlet of a pump. A second flow path connects an outlet of the pump and one end of a third flow path via a cooler. The third flow path is inside a partition wall of a housing and intersects a rotation axis of a first shaft. A fourth flow path connects another end of the third flow path and one end of a fifth flow path. The fifth flow path is inside a gear side lid of the housing. Another end of the fifth flow path is connected to one end of a second shaft in an axial direction. One end of a sixth flow path is connected to another end of the third flow path. Another end of the sixth flow path is inside a housing tubular portion.
    Type: Grant
    Filed: March 17, 2022
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Shohei Fujimoto, Ayumi Nakagawa, Shuhei Nakamatsu, Yusuke Makino
  • Patent number: 11784521
    Abstract: A rotor includes a shaft, a rotor core including a pair of accommodation holes, and a pair of magnets accommodated in the pair of accommodation holes. The pair of magnets extend in directions away from each other in a circumferential direction from the radially inside toward the radially outside. A flux barrier is radially outside the magnet. The rotor core includes a first gap between magnetic poles adjacent to each other in the circumferential direction. The first gap is sandwiched between the flux barriers of the magnetic poles adjacent to each other in the circumferential direction. A radially outside surface of the rotor core includes a pair of core recesses provided in a portion located on the radially outside of the flux barrier and a core protrusion located between the pair of core recesses in the circumferential direction.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventor: Kuniaki Tanaka
  • Patent number: 11784524
    Abstract: A rotor includes an axially extending in an axial direction, a rotor core including a central hole through which the shaft passes and accommodation holes radially outside the central hole, and magnets accommodated in the accommodation holes. The accommodation holes include a pair of accommodation holes extends in a direction away from each other in a circumferential direction from a radially inside toward a radially outside when viewed in the axial direction. The magnets include a pair of magnets accommodated in the pair of accommodation holes. The rotor core includes through-holes made at intervals in the circumferential direction, and is configured by laminating plates. The through-holes are located radially outside the central hole and radially inside the accommodation hole. The stacked plates are fixed to each other by a caulking portion in which a portion of the plate is caulked.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: October 10, 2023
    Assignee: Nidec Corporation
    Inventor: Kuniaki Tanaka
  • Patent number: 11781635
    Abstract: A motor assembly includes a first shaft rotatable about a motor axis, a second shaft that extends along the motor axis and is connected to the first shaft on one side in an axial direction of the first shaft to be movable in the axial direction, a first bearing that supports an end at another side in the axial direction of the first shaft, a second bearing that supports an end at one side in the axial direction of the first shaft, a third bearing that supports an end at another side in the axial direction of the second shaft, and a fourth bearing that supports an end at one side in the axial direction of the second shaft. An elastic portion is on a surface opposing another side in the axial direction of the outer ring of the first bearing.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventor: Keisuke Fukunaga
  • Patent number: 11784532
    Abstract: A shaft of a motor includes a first shaft having a tubular shape extending in an axial direction, a lid portion disposed in one axial end portion of the first shaft, a second shaft extending on one axial side from the lid portion, a first shaft through hole penetrating the first shaft in a radial direction, and a second shaft through hole communicating with an inside of the first shaft and an external space of the shaft. The lid portion and the second shaft have conductivity. The second shaft through hole is disposed on one axial side with respect to the first shaft through hole. The second shaft is in contact with an electrical discharging device that electrically connects the shaft and the housing of the motor.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Takayuki Makino, Tsubasa Hirayama, Masato Aono
  • Patent number: 11784407
    Abstract: A beacon network includes a plurality of beacons arranged at predetermined positions to periodically or intermittently emit a signal wave including identification information, and a radio wave absorber to adjust an emission angle of the signal wave emitted from at least one of the plurality of beacons.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Junji Ito, Tomohiko Tomogane
  • Patent number: 11784522
    Abstract: A rotor includes: a shaft; a tubular rotor core; and a plurality of magnets. The shaft extends along a center axis. The rotor core surrounds the shaft. The plurality of magnets is disposed outside the rotor core in a radial direction and is aligned in a circumferential direction. A plurality of first recessed portions recessed outward in the radial direction is aligned in the circumferential direction in an inner surface of the rotor core in the radial direction. Each of the first recessed portions overlaps each of the magnets in the radial direction.
    Type: Grant
    Filed: February 7, 2022
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Tomoya Ueda, Toshiyuki Sasaki, Yabo Hu
  • Patent number: 11784533
    Abstract: A drive device includes a motor, an inverter to control current supplied to the motor, plate-shaped busbars that electrically connect the motor with the inverter, and a housing that accommodates the motor, the inverter, and the busbars. The housing includes a partition wall that partitions the inside of the housing into a motor housing and an inverter housing. The partition wall is provided with a through hole. Each busbar includes a motor connection terminal, an inverter connection terminal, a first portion extending from the motor connection terminal toward the through hole, and a second portion extending from the first portion to the inverter connection terminal through the through hole. At least two busbars overlap each other in a plate thickness direction inside the through hole.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: October 10, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Hitoshi Kuroyanagi, Yuki Ishikawa
  • Patent number: 11773862
    Abstract: An impeller rotates about a central axis and includes a cup portion having a bottom portion and a cylindrical portion, a base portion, and a plurality of vanes. The impeller further includes a plurality of rib portions, formed on a surface of a side opposite to another side of the base portion where the vanes are provided, wherein each of the rib portions is disposed axially opposite to at least a portion of a corresponding one of the vanes, and the rib portion and the vane are separated by the base portion, wherein a ring-shaped rib portion centering at the central axis and connected with the rib portions is further formed on the surface of the side opposite to the another side of the base portion where the vanes are provided. The ring-shaped rib portion extends axially from the base portion in a direction opposite the vanes.
    Type: Grant
    Filed: January 3, 2022
    Date of Patent: October 3, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Qiang Ma, Toshifumi Fukui, Fengwen Yang
  • Patent number: 11773973
    Abstract: A parking mechanism includes a shaft, a movable portion rotatable with the shaft, a pawl having a claw and movable as the movable portion rotates, a parking gear meshable with the claw, and a stopper contactable with the movable portion. The pawl is switched between parking and non-parking positions in which the claw meshes with and separates from the parking gear, respectively. The movable portion has a first elastic member attached to the shaft, and a contact member connected to the shaft via the first elastic member and in contact with the pawl. The contact member is rotatable in a rotational direction relative to the shaft as the first elastic member is elastically deformed, and is contactable with the stopper in the rotational direction. The stopper faces the contact member at a distance in the rotational direction when the pawl is switched between the parking and non-parking positions.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: October 3, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Tsubasa Tamura, Keisuke Aso
  • Patent number: 11777364
    Abstract: A gear portion of a drive device is connected to a motor shaft. An oil passage through which oil to cool a motor flows includes a first oil passage, a second oil passage, a third oil passage, and a fourth oil passage. The first oil passage connects a gear accommodation portion and a pump accommodation portion. The second oil passage connects the pump accommodation portion and an oil cooler. The third oil passage connects the oil cooler and the fourth oil passage. The fourth oil passage connects the third oil passage and a motor accommodation portion. Each of the first oil passage, the second oil passage, and the third oil passage is in a first housing portion. The fourth oil passage is in a third housing portion.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: October 3, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Hitoshi Kuroyanagi, Naohiro Wada
  • Patent number: 11773979
    Abstract: An application method of applying a liquid agent includes determining any one of positions of the liquid agent at a halfway part between a first end portion and a second end portion in a state in which an application is completed as each of an application start position and an application end position. The method includes applying the liquid agent from the application start position to the first end portion. The method includes turning back from the first end portion and applying the liquid agent to the second end portion, including superimposing, in a height direction, the liquid agent on previously applied liquid agent. The method includes turning back from the second end portion and applying the liquid agent to the application end position, including superimposing, in the height direction, the liquid agent on previously applied liquid agent.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: October 3, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Yuta Hori, Masaji Nakatani
  • Patent number: 11770036
    Abstract: A synchronous reluctance motor includes a rotor and a stator surrounding the rotor. The rotator includes a rotatable shaft and magnetic flux barrier layers arranged radially. One of the magnetic flux barrier layers closest to the stator is filled with a conductor, and one of the magnetic flux barrier layers closest to the rotating shaft is a void.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: September 26, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Pei-Chun Shih, Yu-Wei Hsu, Sheng-Chan Yen, Ta-Yin Luo, Hsin-Nan Lin, Guo-Jhih Yan, Cheng-Tsung Liu
  • Patent number: 11764626
    Abstract: A rotor includes a rotor core, a plurality of magnets positioned radially outside the rotor core, a rotor cover having a tubular portion surrounding the rotor core and the magnet, and a resin portion coupling the rotor core and the magnet with each other. The resin portion has a first lid portion positioned on one axial side of the rotor core and the magnet. The rotor cover has a flange portion projecting radially inward from the tubular portion on one axial side of the first lid portion. The first lid portion has a recess portion depressed from a surface on one axial side of the first lid portion. The recess portion is positioned at a position overlapping between the circumferentially adjacent magnets. The flange portion has a first swage portion swaged to the other axial side and positioned inside the recess portion.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: September 19, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Masato Aono, Hideaki Uchise, Tatsuya Ito
  • Patent number: 11761528
    Abstract: A gearbox and a motor driver having the gearbox are provided. The gearbox includes: a first gear, configured to be rotatable around a first gear shaft parallel to a first direction; a second gear, configured to be rotatable around a second gear shaft parallel to the first gear shaft, and the second gear engages with the first gear, and an outer diameter of the second gear is larger than an outer diameter of the first gear; a parking gear portion, configured to be rotatable around the second gear shaft; a rotation prevention member, configured to be movable between a position where the rotation prevention member is interposed between teeth of the parking gear portion and a position where the rotation prevention member is not interposed between the teeth of the parking gear portion; and a transmission mechanism, configured to transmit a driving force to the rotation prevention member.
    Type: Grant
    Filed: April 20, 2022
    Date of Patent: September 19, 2023
    Assignee: NIDEC CORPORATION
    Inventor: Yoshihisa Okuhata
  • Publication number: 20230283155
    Abstract: A vibration motor and a tactile device are provided. The vibration motor has: a stationary portion; a movable portion having a magnet and capable of vibrating with respect to the stationary portion along a central axis extending in an up-down direction; and an elastic member. The stationary portion has: a housing, disposed radially outside from the movable portion and having a cylindrical shape extending along the central axis; a top surface portion, disposed above the movable portion, fixed to the housing, and extended in a direction intersecting with the central axis; and a coil, capable of applying a driving force to the movable portion. The elastic member is disposed below the top surface portion and above the movable portion. The elastic member is fixed to the top surface portion and the movable portion and supports the movable portion so that the movable portion can vibrate along the central axis.
    Type: Application
    Filed: May 14, 2023
    Publication date: September 7, 2023
    Applicant: NIDEC CORPORATION
    Inventors: Atsunori HIRATA, Ryoichi MITSUHATA
  • Patent number: 11750072
    Abstract: A motor assembly includes a motor including a rotor including a shaft rotatable about a rotation axis and a stator surrounding the rotor from radially outside, a housing that accommodates the motor, a bearing that is fixed to the housing and rotatably supports the shaft, a resolver including a resolver rotor fixed to the shaft and a resolver stator fixed to the housing, and a contact that has conductivity, is fixed to the housing, and is in contact with a contacted portion at an end portion on one axial side of the shaft. The housing includes an accommodation space in which the contacted portion of the shaft is accommodated. The contact and the resolver are side by side in a direction along a rotation axis in the accommodation space.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: September 5, 2023
    Assignee: NIDEC CORPORATION
    Inventors: Takayuki Makino, Tatsuhiko Mizutani, Masato Aono