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).

  • Patent number: 11418070
    Abstract: Phase coils include a first phase coil and a second phase coil, the phase coils are configured by connecting together end portions of the coil terminals of the first phase coil and the second phase coil that extend outward from identical radial positions in the slots axially outside the stator core so as to be radially outside a coil end group, and the coil terminals of the first phase coils of the phase coils of three phases include joint coil portions that extend outward from the slots within a pitch of one magnetic pole, are then bent so as to extend in an identical circumferential direction, and are placed in close proximity to the end portions of the coil terminals of the second phase coils that are intended for connection therewith.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: August 16, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Aida, Saki Shimada, Yoshihito Asao, Satoru Akutsu
  • Patent number: 11394268
    Abstract: Provided is an electric power steering device, including: a motor; and a control device, wherein the motor includes a case having a cylindrical shape, wherein the control device includes: a housing having a cylindrical shape, wherein the case and the housing are coupled to each other in a state in which an outer peripheral end portion at one end portion of the case and an outer peripheral end portion at one end portion of the housing face each other, wherein a first sealing material is disposed between the case and the housing, wherein a connector is disposed between the case and the housing, wherein a second sealing material is disposed between the housing and the connector, and wherein a part of the first sealing material and a part of the second sealing material adhere to each other.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: July 19, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toyoaki Udo, Yoshihito Teshima, Yoshihito Asao
  • Patent number: 11173952
    Abstract: With an object of allowing steering wheel operation to be carried out easily at a normal time and when an abnormality occurs, the invention includes a motor having two windings and a control unit having two control systems that supply control signals to each winding of the motor, and when an abnormality occurs in one winding of the motor or in one system inside the control unit, a supply of current to the winding in which the abnormality has occurred is cut to zero, and the motor is driven by a predetermined current necessary at a normal time being supplied to the other winding, while at a time of a normal drive when no abnormality has occurred, the current supply is shared between the two windings, whereby the motor is driven.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: November 16, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihito Asao, Satoru Akutsu, Akihiko Mori
  • Publication number: 20210237794
    Abstract: There is provided an electric power steering apparatus in which a motor housing that contains motor constituent members and has a waterproofing function and a control unit case that contains control apparatus constituent members and has a waterproofing function are provided, in which an output axle of a motor extends to the outside of the motor housing while maintaining the waterproofing function, and in which a respiratory apparatus that performs a respiratory action, based on an inner pressure change, is provided in the motor housing.
    Type: Application
    Filed: May 22, 2018
    Publication date: August 5, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshihiko ONISHI, Yoshihito ASAO
  • Patent number: 11046356
    Abstract: [Problem] In an electric power steering device that includes a filter section, the electric power steering device in which a motor and a control unit are integrated with each other, a device that aims to improve the noise suppression function of the filter section and improve workability is provided. [Solution] In an electric power steering device that includes a filter section, the electric power steering device in which a motor and a control unit are integrated with each other, the control unit includes a filter module forming the filter section connected near a connector for power supply placed in an outermost portion, and this filter module is configured with wiring for electric conduction, coils and, and a filter substrate on which capacitors are mounted.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: June 29, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kentaro Urimoto, Tomohiko Nagashima, Yoshihito Asao
  • Patent number: 11001297
    Abstract: To provide an electric motor control system and an electric power steering apparatus that torque of the electric motor can be increased for ensuring of steering performance even at the time of abnormality occurrence. The controller is provided with 2 sets of control systems which control a supply current to each set of the windings. When abnormality occurs in one set of the windings and the control system, the electric motor control system sets 0 to supply current to all phase or partial phase windings of abnormality occurrence set, and increase supply current to normal set of the windings up to an irreversible current that increase an irreversible demagnetizing factor of the permanent magnet more than the normal time.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 11, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takizawa, Satoru Akutsu, Yoshihito Asao
  • Patent number: 10985628
    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: Grant
    Filed: August 4, 2016
    Date of Patent: April 20, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideya Nishikawa, Yoshihito Asao
  • Publication number: 20210091625
    Abstract: Provided is an electric power steering device, including: a motor; and a control device, wherein the motor includes a case having a cylindrical shape, wherein the control device includes: a housing having a cylindrical shape, wherein the case and the housing are coupled to each other in a state in which an outer peripheral end portion at one end portion of the case and an outer peripheral end portion at one end portion of the housing face each other, wherein a first sealing material is disposed between the case and the housing, wherein a connector is disposed between the case and the housing, wherein a second sealing material is disposed between the housing and the connector, and wherein a part of the first sealing material and a part of the second sealing material adhere to each other.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 25, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toyoaki UDO, Yoshihito TESHIMA, Yoshihito ASAO
  • 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