Patents by Inventor Jiro Okada

Jiro Okada 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: 9575127
    Abstract: Provided are a motor control device (1) for controlling a motor (2) having a plurality of phases, for quickly and accurately detecting a phase in which an open-state fault has occurred when the open-state fault occurs in a target phase. When a power-supply voltage (Vb) is equal to or higher than a predetermined voltage (Vthr), a motor rotation speed (?) is equal to or lower than a predetermined speed (?thr), a target x-phase voltage command (Vx*) is not in the vicinity of zero, a current (Ix) of the target x-phase is equal to or lower than a predetermined current (Iu_thr), and a state in which a control error is equal to or larger than a predetermined error is detected over a predetermined time period or longer, occurrence of an open-state fault in the target phase is determined.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: February 21, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Isao Kezobo, Masahiro Iezawa, Susumu Zeniya, Eiji Iwami, Yusuke Fujiki, Hiroyuki Kishioka, Sadaaki Kamei, Yoshihiko Kimpara, Jiro Okada
  • Publication number: 20160229444
    Abstract: An initial check is executed individually on each group of a plurality of groups constituted by a plurality of multiphase windings (3a, 3b) of a motor (3) and a plurality of inverter circuits (9a, 9b) corresponding respectively thereto, opening/closing control is executed on a plurality of relays (6a, 6b) in accordance with an implementation result of the initial check so that respective timings at which power is supplied to the plurality of inverter circuits are offset, and drive control is executed on the plurality of inverter circuits in accordance with the implementation result of the initial check. so that respective currents passed through the plurality of multiphase windings are offset.
    Type: Application
    Filed: November 8, 2013
    Publication date: August 11, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Taizo TODA, Jiro OKADA
  • Patent number: 9346487
    Abstract: The apparatus herein provided includes a plurality of systems including driving circuits (20a, 20b) for driving motor coils (3a, 3b) corresponding thereto, and a control unit (10) for controlling control values of the driving circuits (20a, 20b), wherein, when a fault occurs in at least one of the plurality of systems including the motor coils (3a, 3b), the control unit (10) decreases a control value of a system(s) in which the fault occurs from an ordinary time control value or stops the drive by the system(s) in which the fault occurs, and also increases a control value of another system(s) in which the fault does not occur to more than an ordinary time control value.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: May 24, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiko Kimpara, Akihiko Mori, Masaki Matsushita, Jiro Okada
  • Patent number: 9344019
    Abstract: Provided is a control device for an AC rotating machine, for controlling the AC rotating machine including a plurality of sets of windings. The control device includes: a plurality of inverters each including, in respective phases, switching elements for controlling voltages to be applied to respective phases of the windings; current control portion for issuing voltage commands corresponding to the voltages to the respective inverters to control currents flowing through the windings; and failure detection portion for detecting at least one of a short-circuit failure or an open-circuit failure in each of the switching elements. The current control portion sets, in accordance with the failure detected by the failure detection portion, the same potential side of the respective phases of a faulty-side inverter in the same state as in the detected failure, and continues control on a normal-side inverter except for the faulty-side inverter.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: May 17, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Furukawa, Yoshihiko Kimpara, Jiro Okada
  • Patent number: 9225279
    Abstract: A control apparatus for AC rotating machine includes: a voltage command calculation means for calculating voltage commands on two rotational axes; a first voltage application means for applying voltages to first windings of a multiple-winding AC rotating machine having at least the first windings and second windings based on the voltage commands on two rotational axes output by the voltage command calculation means; and a second voltage application means for applying voltages to the second windings based on the voltage commands on two rotational axes output by the voltage command calculation means, wherein the second voltage application means applies voltages to the second windings based on the deviations between the currents fed to the first windings and the currents fed to the second windings.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: December 29, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiko Kimpara, Akira Furukawa, Shunsuke Nakajima, Jiro Okada
  • Publication number: 20150298727
    Abstract: The apparatus herein provided includes a plurality of systems including driving circuits (20a, 20b) for driving motor coils (3a, 3b) corresponding thereto, and a control unit (10) for controlling control values of the driving circuits (20a, 20b) wherein, when a fault occurs in at least one of the plurality of systems including the motor coils (3a, 3b), the control unit (10) decreases a control value of a system(s) in which the fault occurs from an ordinary time control value or stops the drive by the system(s) in which the fault occurs, and also increases a control value of another system(s) in which the fault does not occur to more than an ordinary time control value.
    Type: Application
    Filed: January 11, 2012
    Publication date: October 22, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshihiko KIMPARA, Akihiko MORI, Masaki MATSUSHITA, Jiro OKADA
  • Patent number: 8981704
    Abstract: Provided are a motor controller for suppressing a torque pulsation with a simple configuration and obtaining a sufficient output torque in the case of an open-type fault occurring in any one of windings of a motor and inverters, and an electric power steering device using the motor controller. In the motor controller for controlling a current supplied from and a voltage applied from a power source with respect to the motor including winding sets of a plurality of systems, when a fault determination unit (31) determines the occurrence of the open-type fault, the supply of the currents to the windings of one of the systems in which the fault has occurred is stopped by control performed on switching elements included in the inverter of the faulty system, whereas the supply of the currents to the windings of the normal system in which the fault has not occurred is continued.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: March 17, 2015
    Assignee: Mitsubishi Electronic Corporation
    Inventors: Masaya Endo, Isao Kezobo, Yoshihiko Kimpara, Jiro Okada
  • Publication number: 20140368150
    Abstract: Provided is a control device for an AC rotating machine, for controlling the AC rotating machine including a plurality of sets of windings. The control device includes: a plurality of inverters each including, in respective phases, switching elements for controlling voltages to be applied to respective phases of the windings; current control portion for issuing voltage commands corresponding to the voltages to the respective inverters to control currents flowing through the windings; and failure detection portion for detecting at least one of a short-circuit failure or an open-circuit failure in each of the switching elements. The current control portion sets, in accordance with the failure detected by the failure detection portion, the same potential side of the respective phases of a faulty-side inverter in the same state as in the detected failure, and continues control on a normal-side inverter except for the faulty-side inverter.
    Type: Application
    Filed: May 11, 2012
    Publication date: December 18, 2014
    Inventors: Akira Furukawa, Yoshihiko Kimpara, Jiro Okada
  • Publication number: 20140253009
    Abstract: A control apparatus for AC rotating machine includes: a voltage command calculation means for calculating voltage commands on two rotational axes; a first voltage application means for applying voltages to first windings of a multiple-winding AC rotating machine having at least the first windings and second windings based on the voltage commands on two rotational axes output by the voltage command calculation means; and a second voltage application means for applying voltages to the second windings based on the voltage commands on two rotational axes output by the voltage command calculation means, wherein the second voltage application means applies voltages to the second windings based on the deviations between the currents fed to the first windings and the currents fed to the second windings.
    Type: Application
    Filed: May 22, 2012
    Publication date: September 11, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshihiko Kimpara, Akira Furukawa, Shunsuke Nakajima, Jiro Okada
  • Patent number: 8751962
    Abstract: In regards to the conventional technology for performing operational inputs by referring a GUI and by means of a touch sensor, there exists a problem in which the relationship of correspondence between on-screen locations of selection items on a GUI and touchpad locations cannot be accurately grasped. Moreover, cases in which a touch panel equipped with an information display function instead of a touch sensor is used cause problems in that the cost thereof or power consumed thereby can be relatively high, etc. In order to solve the problems described as above, the present invention provides a remote control that selects an icon on a GUI as a target of operation using a touch sensor, and which is characterized by a configuration that allows a user to easily identify the relationship of correspondence by brightening of a touch sensor on a touchpad corresponding to icon arrangement on a GUI.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: June 10, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takeshi Yarita, Keiichiro Sato, Takamasa Shimizu, Jiro Okada
  • Publication number: 20140054103
    Abstract: Provided are a motor control device (1) for controlling a motor (2) having a plurality of phases, for quickly and accurately detecting a phase in which an open-state fault has occurred when the open-state fault occurs in a target phase. When a power-supply voltage (Vb) is equal to or higher than a predetermined voltage (Vthr), a motor rotation speed (?) is equal to or lower than a predetermined speed (?thr), a target x-phase voltage command (Vx*) is not in the vicinity of zero, a current (Ix) of the target x-phase is equal to or lower than a predetermined current (Iu_thr), and a state in which a control error is equal to or larger than a predetermined error is detected over a predetermined time period or longer, occurrence of an open-state fault in the target phase is determined.
    Type: Application
    Filed: May 7, 2012
    Publication date: February 27, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Isao Kezobo, Masahiro Iezawa, Susumu Zeniya, Eiji Iwami, Yusuke Fujiki, Hiroyuki Kishioka, Sadaaki Kamei, Yoshihiko Kimpara, Jiro Okada
  • Publication number: 20130299271
    Abstract: Provided are a motor controller for suppressing a torque pulsation with a simple configuration and obtaining a sufficient output torque in the case of an open-type fault occurring in any one of windings of a motor and inverters, and an electric power steering device using the motor controller. In the motor controller for controlling a current supplied from and a voltage applied from a power source with respect to the motor including winding sets of a plurality of systems, when a fault determination unit (31) determines the occurrence of the open-type fault, the supply of the currents to the windings of one of the systems in which the fault has occurred is stopped by control performed on switching elements included in the inverter of the faulty system, whereas the supply of the currents to the windings of the normal system in which the fault has not occurred is continued.
    Type: Application
    Filed: February 21, 2013
    Publication date: November 14, 2013
    Inventors: Masaya ENDO, Isao KEZOBO, Yoshihiko KIMPARA, Jiro OKADA
  • Publication number: 20130290901
    Abstract: In regards to the conventional technology for performing operational inputs by referring a GUI and by means of a touch sensor, there exists a problem in which the relationship of correspondence between on-screen locations of selection items on a GUI and touchpad locations cannot be accurately grasped. Moreover, cases in which a touch panel equipped with an information display function instead of a touch sensor is used cause problems in that the cost thereof or power consumed thereby can be relatively high, etc. In order to solve the problems described as above, the present invention provides a remote control that selects an icon on a GUI as a target of operation using a touch sensor, and which is characterized by a configuration that allows a user to easily identify the relationship of correspondence by brightening of a touch sensor on a touchpad corresponding to icon arrangement on a GUI.
    Type: Application
    Filed: December 27, 2011
    Publication date: October 31, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Yarita, Keiichiro Sato, Takamasa Shimizu, Jiro Okada
  • Publication number: 20050268088
    Abstract: A vehicle control system is such that a mobile device transmits a cipher code to an in-vehicle control device based on pre-stored data, and the in-vehicle control device decrypts the received cipher code based on pre-stored data, in order to output a necessary control signal to equipment mounted to a vehicle, the vehicle control system including: the mobile device and the in-vehicle control device each having a memory circuit for storing data for producing cipher related data including a cipher key and an ID code, which are a source of the cipher code; wherein the vehicle control system produces the cipher related data by reading out data in the memory circuits and subjecting the data to a predetermined process determined in advance, and performs production and decryption of the cipher code based on the produced cipher related data.
    Type: Application
    Filed: October 13, 2004
    Publication date: December 1, 2005
    Inventors: Jiro Okada, Tadahiko Urano, Yukihiro Hamamura