Patents by Inventor Mineo Yamamoto

Mineo Yamamoto 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: 11190069
    Abstract: A consequent-pole-type rotor includes a first rotor core having a first insertion hole, and a second rotor core having a second insertion hole, the second rotor core being stacked on the first rotor core such that the first insertion hole and the second insertion hole together form a space accommodating a permanent magnet. The first insertion hole has an opening at a first circumferential position of the first rotor core, and the second insertion hole is occluded at least at a second circumferential position of the second rotor core. The second circumferential position corresponds to the first circumferential position.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: November 30, 2021
    Assignee: Mitsubishi Elextric Corporation
    Inventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 11063484
    Abstract: The rotor of the electric motor includes a rotor magnet. The rotor magnet includes a yoke, and a resin magnet part formed of a resin material containing rare-earth magnetic powder, which is disposed outside the yoke. Multiple pedestals and multiple connecting portions are formed on an end surface of the yoke. The connecting portion joins together the adjacent pedestals. The connecting portions are disposed in a middle position of the end surface in the radial direction. The connecting portions each have a height less than the height of the pedestals. The present invention gains advantage in that the amount of rare-earth magnetic powder used in the rotor magnet can be reduced.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: July 13, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mineo Yamamoto, Tomoaki Oikawa, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 11031831
    Abstract: An electric motor includes an annular stator and a consequent-pole-type rotor including an annular rotor core disposed on the inner side of the stator and a plurality of permanent magnets disposed inside the rotor core and arrayed in a circumferential direction of the rotor core, in which the stator is covered with an unsaturated polyester resin.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: June 8, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 11005350
    Abstract: A permanent-magnet synchronous motor includes: an annular stator core; a cylindrical rotor disposed inside the stator core, and having a first end face in an axial direction of the stator core and a second end face in the axial direction; a disk-shaped sensor magnet having a plurality of magnetic poles disposed circumferentially, and having a third end face and a fourth end face; and a magnetic sensor disposed so as to be opposed to the fourth end face in the axial direction, and detecting a rotating position of the sensor magnet. When a first thickness means the axial thickness at the center of each of the magnetic poles and a second thickness means the axial thickness of an inter-magnetic-pole portion between adjacent magnetic poles of the magnetic poles, the second thickness is greater than the first thickness.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: May 11, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takaya Shimokawa, Kazuhiko Baba, Koji Yabe, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Hiroki Aso, Yuto Urabe
  • Patent number: 10923971
    Abstract: A stator includes a stator core having a first tooth and a second tooth adjacent to each other, a coil having a first winding portion wound around the first tooth and a second winding portion wound around the second tooth, a spacer inserted into a gap between the first winding portion and the second winding portion, and a molding resin covering the stator core, the coil, and the spacer. The spacer is shaped from a plastic material identical with a plastic material of which the molding resin is composed.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: February 16, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Patent number: 10897174
    Abstract: A stator to which a power supply lead wire for supplying electric power is connected, includes a stator core, a winding wound around the stator core, a winding terminal connected to the winding, a circuit board connecting the power supply lead wire and the winding terminal to each other and having a surface facing the stator core, a power supply terminal provided on the surface and connected to the power supply lead wire, and a wiring pattern provided on the surface and connecting the winding terminal and the power supply terminal to each other.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: January 19, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Patent number: 10855134
    Abstract: A motor includes a rotor having a shaft, a stator provided so as to surround the rotor, a first bearing and a second bearing rotatably supporting the shaft and disposed at a distance from each other in an axial direction of the shaft, a molded resin part covering the stator and having a bearing support part supporting the first bearing, a bracket attached to the molded resin part, supporting the second bearing, and having conductivity, and a conductive member provided in contact with both of the bearing support and the bracket.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: December 1, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Ishii, Tomoaki Oikawa, Mineo Yamamoto, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 10855126
    Abstract: An electric motor includes a stator and a consequent-pole-type rotor including an annular rotor core disposed on an inner side of the stator and a plurality of permanent magnets disposed inside the rotor core and arrayed in a circumferential direction of the rotor core. The rotor core includes at least one slit provided inside the rotor core and disposed on an outer side of each of the permanent magnets in a radial direction of the rotor core, and at least one slit provided on an outer circumferential surface of the rotor core and disposed between the permanent magnets adjacent to each other.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: December 1, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe, Takaya Shimokawa, Koji Yabe
  • Publication number: 20200373795
    Abstract: A motor includes a stator to which a substrate can be stably secured without increasing the size of the substrate. An air-conditioning apparatus includes the motor. At an end portion of the stator in the axial direction thereof, a substrate on which electronic components are mounted is provided. The stator includes: a stator core formed by stacking electromagnetic steel sheets, and including a plurality of teeth; insulators provided on the stator core; and a wire wound around the teeth, the teeth being coated with the insulators. The insulators have outer walls provided on respective core backs of the stator core.
    Type: Application
    Filed: January 18, 2018
    Publication date: November 26, 2020
    Inventors: Mineo YAMAMOTO, Hiroyuki ISHII, Junichiro OYA, Yuto URABE
  • Patent number: 10763712
    Abstract: A consequent-pole-type rotor including a rotor core and a permanent magnet 1 disposed inside the rotor core, includes a first rotor core having a first region into which the permanent magnet is inserted and a second rotor core that has a second region communicating with the first region and is stacked on the first rotor core, wherein a second width is larger than a first width, where the first width is a width of the first region in a radial direction of the rotor core and the second width is a width of the second region in the radial direction of the rotor core.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: September 1, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryogo Takahashi, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
  • Patent number: 10754278
    Abstract: An image forming apparatus including: a fixer that fixes a toner image formed on a recording medium by pressing and heating the recording medium nipped in a nip portion formed by causing two rotating bodies to pressedly abut on each other, and conveying the recording medium by rotating the rotating bodies; a motor that drives the rotating bodies by transmitting a torque to at least one of the rotating bodies; a torque detector that detects the torque transmitted to the rotating body by the motor; a temperature detector that detects temperature of the rotating body; a speed detector that detects a conveyance speed for conveying the recording medium by the fixer; and a controller that corrects the detected torque based on at least any one of the detected temperature and the detected conveyance speed and predicts a life of the fixer based on the corrected torque.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: August 25, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Masayuki Fukunaga, Toshiaki Tanaka, Masayuki Watanabe, Mineo Yamamoto
  • Publication number: 20200208859
    Abstract: An electric motor includes a stator, a rotor, and a magnetic sensor. The stator has an iron core and a magnetic flux coil. The rotor has a rotary shaft and a cylindrical rotor magnet. The magnetic sensor has a sensor unit that outputs an electric signal based on an applied magnetic flux. The rotor magnet is disposed so as to face the iron core of the stator. The rotor magnet has a main magnet unit and a sensor magnet unit that is formed integrally with the main magnet unit and has an external diameter smaller than an external diameter of the main magnet unit. The magnetic sensor is disposed beside the sensor magnet unit. An outer circumferential edge of the sensor magnet unit is located farther away from the rotary shaft than a center of the sensor unit. The magnetic sensor is configured such that a center of the sensor unit and a center of the magnetic sensor do not match each other, and the center of the sensor unit is closer to the sensor magnet unit than the center of the magnetic sensor.
    Type: Application
    Filed: September 11, 2017
    Publication date: July 2, 2020
    Inventors: Junichiro OYA, Mineo YAMAMOTO, Hiroyuki ISHII, Yuto URABE, Takaya SHIMOKAWA
  • Patent number: 10673291
    Abstract: A permanent-magnet electric motor includes an annular stator core, a rotor core, and a rotating-position detection sensor. In each of a plurality of magnet insertion holes formed in the rotor core, a rare-earth magnet and a ferrite magnet are disposed adjacent to each other in an axial direction of the rotor core. The rotor core has an axial length longer than an axial length of the stator core. The rare-earth magnet is disposed in each of the magnet insertion holes to be opposed to the stator core in a radial direction of the stator core. The ferrite magnet disposed in each of the magnet insertion holes is disposed between the rare-earth magnet disposed in the corresponding magnet insertion hole and the rotating-position detection sensor.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: June 2, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe, Takaya Shimokawa
  • Patent number: 10608483
    Abstract: A stator includes a plurality of winding sections circumferentially disposed at an equal interval; a spacer inserted into a space between the winding sections; and a resin section filling the space into which the spacer is inserted.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: March 31, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Patent number: 10598393
    Abstract: An electric-power control device including a substrate of an annular shape in which a through hole is formed and a connector is arranged in a peripheral part, the electric-power control device driving an electric motor. On the substrate, a power semiconductor module is mounted on a first region on one side relative to a straight line connecting the center of the through hole to the center of the connector, and a microcomputer is mounted on a second region on the other side. Furthermore, a first ground pattern part that is formed extending from the power semiconductor module toward the connector in the first region and a second ground pattern part that is formed extending from the microcomputer toward the connector in the second region are provided on the substrate.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: March 24, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Junichiro Oya, Mineo Yamamoto, Hiroyuki Ishii, Yuto Urabe
  • Patent number: 10601285
    Abstract: An object of the present invention is to obtain a wiring board that achieves both of high mounting position accuracy and high solder strength in a circumferential direction. On the wiring board, an electronic component including a plurality of pins is mounted. The wiring board includes a base substrate, a plurality of wires provided on the base substrate, a resist covering the wires, and a plurality of footprints connected to the wires and having entire surfaces exposed in openings of the resist. The pins are soldered to the footprints by reflow. In the openings of the resist, directions in which the pins are led out are parallel to directions in which the wires are led out.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: March 24, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Junichiro Oya, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Yuto Urabe
  • Patent number: 10602006
    Abstract: An operation terminal is held by and detachable from a holder on an MFP. The operation terminal includes a touch panel with a display region for an operation screen for the MFP. The touch panel senses an external object touching the display region. A vibrator unit applies vibration to the display region. In response to the touch panel sensing the object, a response controller unit instructs the vibrator unit to apply to the display region vibration responsive to the object. The response controller unit checks whether the operation terminal is held by or detached from the holder at the time the touch panel senses the object, and when the operation terminal is held by the holder, sets the responsive vibration to a level lower than when the operation terminal is detached from the holder.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: March 24, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Mineo Yamamoto, Isao Watanabe, Toshikazu Higashi, Hiroshi Yamaguchi
  • Patent number: 10594184
    Abstract: The stator includes a stator core having a first tooth and a second tooth adjacent to each other, a coil having a first winding portion wound around the first tooth and a second winding portion wound around the second tooth, a resin chip disposed in in a gap between the first winding portion and the second winding portion, and a molding resin covering the stator core, the coil, and the resin chip.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: March 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
  • Publication number: 20190386530
    Abstract: A consequent-pole-type rotor including a rotor core and a permanent magnet 1 disposed inside the rotor core, includes a first rotor core having a first region into which the permanent magnet is inserted and a second rotor core that has a second region communicating with the first region and is stacked on the first rotor core, wherein a second width is larger than a first width, where the first width is a width of the first region in a radial direction of the rotor core and the second width is a width of the second region in the radial direction of the rotor core.
    Type: Application
    Filed: August 22, 2016
    Publication date: December 19, 2019
    Inventors: Ryogo TAKAHASHI, Tomoaki OIKAWA, Mineo YAMAMOTO, Hiroyuki ISHII, Hiroki ASO, Junichiro OYA, Yuto URABE
  • Patent number: 10491082
    Abstract: A permanent-magnet electric motor includes: a rotor; and a rotational-position detection sensor configured to detect a rotational position of the rotor. The rotor includes: a rotating shaft; an annular ferrite magnet disposed on an outer circumferential surface of the rotating shaft; and a rare-earth magnet disposed on an outer circumferential surface of the ferrite magnet, and a length from a center of the ferrite magnet in an axial direction of the ferrite magnet to an end face of the ferrite magnet on a side of the rotational-position detection sensor in the axial direction of the ferrite magnet is longer than a length from a center of the rare-earth magnet in an axial direction of the rare-earth magnet to an end face of the rare-earth magnet on a side of the rotational-position detection sensor in the axial direction of the rare-earth magnet.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: November 26, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe, Takaya Shimokawa