Patents Assigned to Nidec Corporation
  • Power conversion device, motor module, electric power steering device
    Patent number: 11356050
    Abstract: A power conversion device includes a first inverter, a second inverter, first and second controller to control the first and second inverters, and a driving circuit to apply a control signal to turn on the low side switch elements of the first inverter when a fault occurs on the first inverter side, and apply a control signal to turn on the low side switch elements of the second inverter when a fault occurs on the second inverter side. The first power voltage generated on the first inverter side is supplied to the driving circuit when a fault occurs on the second inverter side, and the second power voltage generated on the second inverter side is supplied to the driving circuit when a fault occurs on the first inverter side.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: June 7, 2022
    Assignee: NIDEC CORPORATION
    Inventor: Motoki Horiuchi
  • Motor and electric power steering system
    Patent number: 11355994
    Abstract: A bush attached to a through hole of a casing of a motor holds a conductor. The bush includes a main body, an insertion hole, a flange, and a rib. The main body includes a first end surface, a second end surface facing the first end surface in a first direction, and side surfaces between the first end surface and the second end surface. The insertion hole penetrates an inside of the main body in the first direction, and allows the conductor to pass through. The flange protrudes from a side surface in a direction perpendicular or substantially perpendicular to the first direction. The rib protrudes from the side surface in a direction perpendicular or substantially perpendicular to the first direction.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: June 7, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Takahiro Kizu, Ryosuke Kozu, Yuichi Nishikawa, Takahiro Hisada, Takanobu Oyama
  • Air blower
    Patent number: 11353032
    Abstract: An air blower includes an impeller, a motor, a lead wire, and a casing. The impeller rotates around a central axis extending in a vertical direction. The motor rotates the impeller. The lead wire is connected to the motor. The casing houses the impeller and the motor. The casing includes a bottom plate portion, a side wall portion, and a top plate portion. The top plate portion is disposed axially above the impeller and is connected to the upper end of the side wall portion. The casing includes a lead-out port through which the lead wire is led out to the outside in the radial direction. The lead-out port includes a lower portion provided on the bottom plate portion and an upper portion provided on the side wall portion, and the lower and upper portions are defined by different members.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: June 7, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Takashi Uchino, Yukinobu Shiraishi
  • Power conversion apparatus, motor module, and electric power steering apparatus
    Patent number: 11356036
    Abstract: A power conversion apparatus includes a first inverter, a second inverter, a drive circuit to provide control signals turning on low-side switch elements in the first inverter to the low-side switch elements when a failure has occurred on a first inverter side, and provide control signals to turn on low-side switch elements in the second inverter to the low-side switch elements when a failure has occurred on a second inverter side, and a control circuit. When a failure has occurred on the second inverter side, a first power supply voltage generated on the first inverter side is supplied to the drive circuit, while when a failure has occurred on the first inverter side, a second power supply voltage generated on the second inverter side is supplied to the drive circuit.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: June 7, 2022
    Assignee: NIDEC CORPORATION
    Inventor: Motoki Horiuchi
  • Motor
    Patent number: 11349374
    Abstract: A motor according to a disclosed embodiment includes: a plurality of magnetic sensors that output sine wave signals having a certain phase difference in order in accordance with rotation of a rotor; a signal amplifier that amplifies a difference between an output signal of each of the plurality of magnetic sensors and an average signal that is an average of the output signals of the plurality of magnetic sensors; and a pulse signal generation unit that converts an output signal of the signal amplifier into a pulse signal.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: May 31, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Masaki Yoshinaga, Tomohiro Fukumura, Taro Amagai, Akiko Ikeda, Kengo Araki
  • Control method of moving body and control system of moving body
    Patent number: 11345033
    Abstract: The disclosure provides a control method of a moving body and a control system of a moving body, which allow a control part to calculate a fragment of a moving path between the moving body and a target according to position information of the moving body and the target, and transmit the fragment to the moving body. The above steps are repeatedly executed in sequence until the moving body reaches the target.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: May 31, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Chun-Hsien Liu, Bo Yi Li, Sheng-Jen Chen, Chih-Hsiang Chen, Yung-Chih Pan, Chi-Ying Lee
  • Stator, motor, and electric power steering device
    Patent number: 11342805
    Abstract: A stator comprises: a stator core placed in a circular ring shape around a central axis that extends vertically, onto which coil wires are wound; a first support member placed over the stator core; and a second support member placed over the first support member, the first support member having receiving grooves for guiding the coil wires coming out of the stator core, wherein the receiving grooves are grooves that open to the top and extend in a direction along the top surface of the first support member, the second support member having through-holes that axially support the coil wires, wherein the second support member at least partially overlaps the receiving grooves of the first support member in an axial view.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: May 24, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Hiroshi Ogawa, Yoshinobu Arao, Yoshiaki Yamashita
  • Motor
    Patent number: 11342812
    Abstract: In an aspect of the motor of the present invention, the motor includes a shaft centered on a center axis extending in a predetermined direction, and a stator located radially outside of the shaft. The stator has a coil wound around the stator. The motor further includes a housing member having a substantially cylindrical shape with a bottom, where the housing member accommodates substantially the entire stator, and supports the shaft, a cooling medium with which the housing member is filled, where the stator and the coil is immersed in the cooling medium, and a rotor that rotates radially outside of the housing member with the center axis of the shaft as a rotation center.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 24, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yoshinobu Nakamura, Takaaki Bando, Daisuke Ogasawara, Tsutomu Furukawa, Kazutoshi Matsuda
  • Motor
    Patent number: 11336146
    Abstract: A motor includes a rotor including a shaft centered on a vertically extending center axis, a stator radially opposite to the rotor and including coils, a bearing supporting the shaft, and a bus bar assembly on an upper side in an axial direction of the stator. The bus bar assembly includes bus bars including a terminal portion connected to a lead wire drawn out from the coil and a bus bar holder holding the bus bars. The terminal portion includes a slit which extends axially downward and into which the lead wire is fitted. The width of the slit is narrower than the diameter of the lead wire.
    Type: Grant
    Filed: November 4, 2020
    Date of Patent: May 17, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yuhei Yamaguchi, Ryusuke Sato, Hisashi Fujihara, Keigo Nakamura
  • Motor
    Patent number: 11336145
    Abstract: A motor includes a rotor, a stator, and first bus bars electrically connected to the stator on one axial direction side of the stator. The stator includes a stator core including a core back extending in a circumferential direction, teeth extending radially from the core back, and coils defined by winding a conducting wire, each of which is mounted on the teeth. A first conducting wire and a second conducting wire which are two respective ends of the conducting wire extend to one axial direction side from each of the coils. The first bus bars are neutral point bus bars connecting two or more first conducting wires as neutral points. The second conducting wire is connected to a power supply that supplies power to the stator.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: May 17, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yoshiaki Yamashita, Shunsuke Murakami, Kosuke Ogawa
  • Stator assembly of a blowing device having terminal PIN secured to a circuit board
    Patent number: 11336143
    Abstract: A stator assembly for use in a motor includes an annular stator and a circuit board. The stator having an annular shape is centered on a central axis extending vertically. The circuit board is above the stator in an axial direction. The stator includes a stator core, an insulator, a conductive wire, and a terminal pin. The stator core includes teeth. The insulator covers at least a portion of the stator core. The conductive wire is wound around the teeth via the insulator to define a coil. The terminal pin extends axially upward from an upper surface of the insulator and is connected to an end portion of the conductive wire. The circuit board includes a solder portion on an upper surface. The solder portion enables electrical connection with the terminal pin and is covered with a coating layer.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: May 17, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Tsuyoshi Yasumura, Yuta Iwasaki, Kohei Kurazono, Yuya Horii
  • Drive apparatus and oil changing method
    Patent number: 11333238
    Abstract: A drive apparatus includes a motor; a reduction gear connected to the motor; a differential connected to the reduction gear, for rotating an axle about a differential axis; a housing including a gear housing portion housing the reduction gear and the differential; and an oil housed in the gear housing portion. The differential includes a gear for rotating about the differential axis. An end portion of the gear is lower than the reduction gear, and is configured to soak in the oil. The housing includes an oil drain hole and an oil feed hole for joining an interior of the housing and a space outside of the housing, a first stopper member removably in the oil drain hole, and a second stopper member removably in the oil feed hole. Each of the oil drain hole and the oil feed hole is in a portion of the gear housing portion.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: May 17, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Shuhei Nakamatsu
  • Motor
    Patent number: 11329527
    Abstract: A motor includes a motor main body, a housing, a heat sink, a controller, a connector, and a cover that surrounds the controller and the connector. The heat sink includes a connector holder including an open outer side in a radial direction and holding the connector. The motor includes a ring-shaped cover joint portion that surrounds the controller and includes a stepped portion that includes a first surface and a second surface. The cover includes a cylindrical portion that faces the first surface in the radial direction. The motor includes a waterproof material that seals a portion between the cylindrical portion and the first surface or a portion between the cylindrical portion and the second surface.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: May 10, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Takashi Hattori, Yuichi Nishikawa, Yuki Hamada, Yu Kuwamoto
  • Power conversion device, motor module, and electric power steering device
    Patent number: 11329588
    Abstract: A power conversion device includes a first inverter, a second inverter, and a control circuit that performs Pulse Width Modulation (PWM) control of switching elements of the first and second inverters according to at least one switching scheme. For an H bridge of each phase, the control circuit performs PWM control according to at least one switching scheme that turns on a high-side switching element in one of a pair of legs and switches a low-side switching element in another of the pair of legs, or turns on a low-side switching element in one of the pair of legs and switches a high-side switching element in another of the pair of legs.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: May 10, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Shuji Endo, Kaori Nabeshi
  • IMPELLER AND CENTRIFUGAL FAN HAVING THE IMPELLER
    Publication number: 20220128061
    Abstract: An impeller, rotating about a central axis includes a cup portion having a bottom portion and a cylindrical portion, a base portion, 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, and the ring-shaped rib portion extends axially from the base portion in a direction opposite the vanes.
    Type: Application
    Filed: January 3, 2022
    Publication date: April 28, 2022
    Applicant: NIDEC CORPORATION
    Inventors: QIANG MA, Toshifumi FUKUI, Fengwen YANG
  • Method of manufacturing coil and method of manufacturing motor
    Patent number: 11316414
    Abstract: A method of manufacturing a coil includes forming a wound body by winding a coil wire in multiple layers, and forming a coil by pressing the wound body using a die surrounding the wound body and compressively deforming the wound body. The wound body has a contour of a rectangular or substantially rectangular shape in cross section, and includes coil wire portions located in the cross section of the coil wire, the coil wire portions being aligned along each side of the rectangular or substantially rectangular shape. The coil has a contour of a fan shape or approximate fan shape in the cross section, where the coil wire portions are aligned in a direction along an arc and a radial direction of the fan shape or approximate fan shape.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: April 26, 2022
    Assignee: NIDEC CORPORATION
    Inventor: Shigeharu Sumi
  • Method of manufacturing rotor, rotor, and motor
    Patent number: 11316416
    Abstract: A method of manufacturing a rotor includes forming plates each including a scrap portion that has a center hole and core plate portions that are disposed continuously with the scrap portion on an inner side of the center hole and that each defines a portion of a corresponding one of the outer cores forming a multilayer body including the outer cores by stacking the plates, setting at least a portion of the multilayer body and a portion of the inner core in a mold with a gap therebetween in the radial direction, forming a molded body by pouring a molten filling material into a gap in the mold and forming the filling section, at least a portion of the filling section being positioned between the outer cores, and separating the scrap portion and the core plate portions from each other.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: April 26, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Yasuaki Nakahara, Keisuke Saito, Takeshi Honda, Hirofumi Muto, Osamu Fujimoto
  • Electric motor with busbar unit
    Patent number: 11309774
    Abstract: An electric motor includes a rotor rotatable about a rotation axis, and a stator that externally surrounds the rotor and includes a stator core and coils wound on the stator core. The windings are defined by a winding wire including winding wire end portions that are electrically contacted at end surfaces thereof by busbars held at least partially in a busbar holder, and include a ground contact to connect the stator to a ground potential. The ground contact includes a first end region received in a longitudinal groove on an outside of the stator core.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: April 19, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Pascual Guardiola, Thomas Kübler
  • Calibration apparatus and calibration method
    Patent number: 11298827
    Abstract: A calibration apparatus of a robot that includes an arm, a joint attached to the arm, a motor provided to the joint, and a gear speed reducer provided between the motor and the joint includes setting circuitry that sets a destination position of the end of the arm in a predetermined three-dimensional space, acquiring circuitry that acquires an angle of the joint when the end of the arm is moved to the destination position, adjusting circuitry that adjusts the angle acquired by the acquiring circuitry in accordance with rotational angle transmission error in gears of the gear speed reducer, and correcting circuitry that corrects Denavit-Hartenberg (DH) parameters of the robot by using the angle adjusted by the adjusting circuitry.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: April 12, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Vineet Jacob Kuruvilla, Haruhiro Tsuneta
  • Fan and electromechanical device
    Patent number: 11303184
    Abstract: A fan and an electromechanical device are provided. The fan includes: an impeller, a motor, a motor support portion, a wire, and a wire lead-out portion. The wire lead-out portion includes: a base portion; a wire holding portion limiting movement of the wire in a first direction; and a wire locking portion, formed at an end of the wire holding portion and extending along the extension direction of the base portion, wherein the wire locking portion limits a movement of the wire in a second direction perpendicular to both the first direction and the extension direction of the base portion. The wire locking portion includes a blocking portion that does not extend beyond the wire holding portion in the extension direction of the base portion, and an extension portion extending from the blocking portion to an outer side of the wire holding portion along the extension direction of the base portion.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: April 12, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Qiang Ma, Toshifumi Fukui