Patents by Inventor Yoshihito Asao

Yoshihito Asao 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: 20210057958
    Abstract: A breathing device includes a ventilator, which is arranged on an end surface of the control unit provided with a connector on an opposite side of an output shaft of a rotating machine so as to protrude from an inside of the electric power steering device toward an outside of the electric power steering device, and is configured to provide a breathing action through ventilation between the inside and the outside. The ventilator protrudes in a horizontal direction or upward with respect to the horizontal direction.
    Type: Application
    Filed: July 5, 2018
    Publication date: February 25, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toyoaki UDO, Yoshihito ASAO
  • Patent number: 10913488
    Abstract: An electric power steering device of a steer-by-wire type includes: a steering input mechanism, which includes a steering wheel to be operated by a driver; a reaction force motor, which is configured to apply a steering reaction force to the steering wheel; a steering motor, which is configured to output a steering force; a steering mechanism, which is prevented from being mechanically connected to the steering input mechanism, and is configured to steer a steered wheel through the steering force generated by the steering motor; and a drive control device, which is configured to carry out drive control for the steering motor and the reaction force motor. At least one of the steering motor or the reaction force motor is constructed of a double-winding motor of a double-inverter type in which each of windings is duplexed, and the respective duplexed windings are individually driven by two inverters.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: February 9, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Akutsu, Yoshihito Asao
  • Patent number: 10916983
    Abstract: A permanent-magnet motor includes a through-hole expansion portion provided in a through-hole for inserting a permanent magnet into the rotor core of a permanent-magnet motor, and a bridge portion that surrounds adjacent through-hole expansion portions and forms part of the outer circumferential surface of the rotor core; the bridge portion has a small-thickness portion that is formed to be smaller than that of a portion, other than the bridge portion, of the rotor core.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: February 9, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Aida, Masafumi Okazaki, Satoru Akutsu, Yoshihito Asao, Yuji Takizawa
  • Patent number: 10906577
    Abstract: A power-source connector is situated at or in the vicinity of the radial-direction middle portion of a housing and is fixed to the housing, and a first connection portion and a second connection portion for connecting the winding terminal of an armature winding with a control circuit unit are substantially symmetrically arranged at positions corresponding to the radial-direction peripheral portions of the power-source connector.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: February 2, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kentaro Urimoto, Yoshihito Asao
  • Publication number: 20210001918
    Abstract: There is provided an electric power steering apparatus in which at least one of a motor housing and a control unit has a respiratory apparatus that performs a respiratory action, based on an inner pressure change in at least one of the motor housing and the control unit.
    Type: Application
    Filed: May 22, 2018
    Publication date: January 7, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshihito ASAO, Yoshihiko ONISHI, Toyoaki UDO
  • Patent number: 10873233
    Abstract: There is provided a case of an electric apparatus and the manufacturing method therefor in which a sealing material, the portion of which at the depth is cured without being heated, is utilized at the junction portion of two or more case members. The case of the electric apparatus has a gap forming portion that form a gap in a junction portion where two or more case members for containing an electric apparatus are joined to each other and a sealing material filled into the gap between the gap forming portion; the sealing material is a two-liquid-mixed addition-reaction-curable sealing material that has a normal-temperature curability and includes a platinum catalyst.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: December 22, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideya Nishikawa, Yoshihito Asao, Tomo Ide
  • Patent number: 10840832
    Abstract: A permanent-magnet three-phase duplex motor is provided with two systems, namely a system that includes a first three-phase winding and a first inverter circuit, and a system that includes a second three-phase winding and a second inverter circuit, and a controlling apparatus is configured such that when one system fails, the controlling apparatus stops operation of the inverter circuit of the failed system, and controls operation of the inverter circuit of the normal system to increase the driving current that is supplied from the inverter circuit of the normal system, and the first three-phase winding and the second three-phase winding are configured such that magnetic fields that act on the permanent magnets in a demagnetizing direction when the increased driving current is supplied from the inverter circuit of the normal system are equal to magnetic fields that normally act on the permanent magnets in the demagnetizing direction.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: November 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Akutsu, Yoshihito Asao
  • Patent number: 10793182
    Abstract: An integrated electric power steering apparatus in which a control unit 1 or 101 for controlling a motor 2 is disposed inside a housing, the control unit 1 or 101 is disposed so as to be coaxial to an output shaft 21 of the motor 2, and in which the control unit 1 or 101 and the motor 2 are integrated, wherein: the control unit 1 or 101 includes a circuit board 4 and an intermediate member 36; main parts are mounted to the circuit board 4; wiring is disposed on the intermediate member 36; the circuit board 4 and the intermediate member 36 are stacked; the parts are mounted to first and second surfaces of the circuit board 4; and a portion of the housing and first surfaces of the parts are placed in direct contact or are placed in contact so as to have a heat-transferring member interposed.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: October 6, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihito Asao, Akihiko Mori
  • Patent number: 10759467
    Abstract: Provided is an integrated electric power steering apparatus including a positive-side wiring pattern configured to connect a positive side of a power supply and a positive side of an inverter circuit and a negative-side wiring pattern configured to connect a negative side of the power supply and a negative side of the inverter circuit, in which one of the wiring patterns is formed on a central side of a wiring board and another of the wiring patterns is formed on an outer periphery side of the wiring board. A plurality of switching elements forming the inverter circuit are mounted between the positive-side wiring pattern and the negative-side wiring pattern formed on the wiring board.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: September 1, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Isao Sonoda, Shunsuke Fushie, Yoshihito Asao, Akihiko Mori
  • Publication number: 20200247462
    Abstract: An electric power steering device of a steer-by-wire type includes: a steering input mechanism, which includes a steering wheel to be operated by a driver; a reaction force motor, which is configured to apply a steering reaction force to the steering wheel; a steering motor, which is configured to output a steering force; a steering mechanism, which is prevented from being mechanically connected to the steering input mechanism, and is configured to steer a steered wheel through the steering force generated by the steering motor; and a drive control device, which is configured to carry out drive control for the steering motor and the reaction force motor. At least one of the steering motor or the reaction force motor is constructed of a double-winding motor of a double-inverter type in which each of windings is duplexed, and the respective duplexed windings are individually driven by two inverters.
    Type: Application
    Filed: December 28, 2015
    Publication date: August 6, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Satoru AKUTSU, Yoshihito ASAO
  • Patent number: 10734868
    Abstract: In this vehicle electronic control device, a control board having an electronic component mounted thereon is housed inside a case and a connector portion for connecting the control board to the outside is formed integrally with the case. The connector portion is formed by a housing portion covering the control board, and a terminal portion integrally embedded in the housing portion. The terminal portion has: a terminal for external connection, protruding from the housing portion; and an intermediate path portion extending from the terminal and connected to the control board. An exposure portion which allows the intermediate path portion to be exposed over the entire periphery thereof is formed in a part of the housing portion. An interface sealing member for sealing the interface between the housing portion and the intermediate path portion is provided in the exposure portion.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: August 4, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kohei Ushio, Yoshihito Asao, Akihiko Mori
  • Patent number: 10710628
    Abstract: The motor unit includes a motor case containing a stator and a rotor fixed to an output shaft; the control unit includes a unit case containing constituent members of the control unit that controls the motor unit; the motor unit and the control unit are fixed to each other in such a way that an axle-direction end, at the unit case side, of the motor case is made to abut on an axle-direction end, at the motor unit side, of the unit case and then the both ends are bonded to each other.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: July 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihito Asao, Akihiko Mori
  • Publication number: 20200220423
    Abstract: Provided is an electric drive device capable of achieving redundant supply of power from outside and achieving downsizing. An electric drive device, including: a motor; a controller configured to control driving of the motor; and a power supply connector electrically connected to the controller, the power supply connector including: a power supply connector housing; and a first power supply terminal and a second power supply terminal, which are provided in the power supply connector housing and electrically connected to separate external power sources, respectively.
    Type: Application
    Filed: August 4, 2016
    Publication date: July 9, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hideya NISHIKAWA, Yoshihito ASAO
  • Patent number: 10696320
    Abstract: In the electric power steering apparatus according to the present invention, a circuit board and an intermediate member are disposed so as to be juxtaposed in an axial direction of a rotating shaft, a connector is formed integrally on the intermediate member, and is disposed so as to pass through and protrude from a notch in a housing, and at least one of a cylindrical portion of a motor case, a frame, and the housing is configured so as to bear stress in the axial direction of the rotating shaft, that acts on the connector during insertion and removal of the connector.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: June 30, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihito Asao, Akihiko Mori
  • Patent number: 10673309
    Abstract: An inverter-integrated motor according to the present invention is configured such that an inverter module and a motor are integrated so as to line up in an axial direction of the motor, the inverter module is configured into a single member in which are integrated: a power portion that includes an inverter; and a control portion that includes a microcomputer, and the motor includes: a rotor; a stator; and a pair of housings that include bearings that support a shaft of the rotor.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: June 2, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Akutsu, Yoshihito Asao
  • Patent number: 10644642
    Abstract: To provide a three phase duplexing motor for electric power steering apparatus that can manage increase in a supply current and can manage influence on motor, when increasing a supply current to the three phase windings of the normal set. An three phase duplexing motor for electric power steering apparatus sets 0 to a supply current to three phase winding of abnormality occurrence set, and increases a supply current to three phase windings of the normal set, with a preliminarily set increase upper limit current value as an upper limit.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 5, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Akutsu, Yoshihito Asao
  • Patent number: 10618545
    Abstract: In an electric power steering apparatus, a control unit includes: a power module that is in surface contact with a heatsink, and in which a plurality of switching elements are mounted internally; a holder that places the power module in close contact with the heat sink, and that also positions the power module; and a controlling circuit board that is disposed so as to be separated axially from the holder, and on which a central processing unit (CPU) is mounted; and the power module is disposed on a first surface of a first side of the holder, and a circumferential surface of a capacitor that suppresses electric power supply pulsation is disposed so as to be in close contact with a capacitor recess portion that is formed on a second surface of a second side of the holder.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: April 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihito Asao, Akihiko Mori
  • Patent number: 10548213
    Abstract: An electronic controlling apparatus includes a circuit board in which conductor layers and insulating layers are disposed alternately. In some embodiments, thicknesses of an upper portion outer conductor layer that is disposed on a first surface of the circuit board and a lower portion outer conductor layer that is disposed on a second surface of the circuit board are identical and have greatest thickness among the conductor layers, or thicknesses of a first outermost position inner conductor layer and a second outermost position inner conductor layer that are positioned at two end portions inside the circuit board are identical and have greatest thickness among the conductor layers, and the conductor layers are disposed symmetrically so as to have a central plane in a thickness direction of the circuit board as a plane of symmetry. In some embodiments, thicknesses and arrangements of conductor layers are not symmetrical in the thickness direction of the circuit board.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: January 28, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomohiko Nagashima, Yoshihito Asao
  • Patent number: 10479398
    Abstract: A control unit for controlling an electric motor has on a wiring board at least an inverter circuit including two or more switching devices for supplying an electric current to the electric motor and a CPU for outputting command signals to the inverter circuit; the control unit, as an inverter module in which the wiring board is mounted in a housing with which a connector is integrated, is integrally fixed to the motor.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kentaro Urimoto, Yoshihito Asao, Akihiko Mori
  • Publication number: 20190291780
    Abstract: Provided is an electric power steering device including: a front-wheel steering mechanism, which is provided to front wheels of a vehicle, and includes a front-wheel steering motor as a drive source; and a rear-wheel steering mechanism, which is provided to rear wheels of the vehicle, and includes a rear-wheel steering motor as a drive source, wherein the rear-wheel steering motor is configured to be a double-inverter three-phase duplex motor, the double-inverter three-phase duplex motor including two three-phase windings and two inverters each configured to individually drive one of the two three-phase windings. Therefore, the electric power steering device is capable of, even when a failure has occurred in the steering motor of the rear-wheel steering mechanism, maintaining a function of the rear-wheel steering mechanism to secure behavior stability of the vehicle.
    Type: Application
    Filed: October 4, 2016
    Publication date: September 26, 2019
    Inventors: Satoru AKUTSU, Yoshihito ASAO