Patents by Inventor Takayuki Takashige

Takayuki Takashige 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: 8353172
    Abstract: There is provided a control device of a permanent-magnet type synchronous motor that sets a synchronous operation current at start-up in response to a current limiting value determined from the temperature of an inverter that supplies three-phase power to the permanent-magnet type synchronous motor, that monitors an output voltage or an output current of the inverter during a rotation stabilizing period after start-up, and that updates the synchronous operation current using this output voltage or output current.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: January 15, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige, Koji Nakano, Takashi Nakagami
  • Patent number: 8308442
    Abstract: There is provided an integrated electric compressor having a circuit configuration capable of decreasing the size thereof while restraining current ripples. In an inverter of the electric compressor, by providing a capacitor 13 and a reactor 14 between a power source and an inverter board 12, the ripples of a driving voltage is restrained, and a motor can be driven with high efficiency and the size of a housing can be decreased. Further, by connecting the capacitor 13 and the reactor 14 to a power board 16 by using a bus bar 23, the voltage ripple restraining effect is further increased, and the capacitor 13 and the reactor 14 are unitized integrally by the bus bar 23 to improve the assembling workability of the power board 16.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: November 13, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kenji Tsutsui, Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Koji Nakano
  • Publication number: 20120234030
    Abstract: Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor integrally including a compressor, an electric motor that drives the compressor, and an inverter including a temperature sensor that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller estimates a discharge temperature of the compressor on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter, for the rotational speed of the compressor, and for the motive force of the compressor in a refrigerating cycle.
    Type: Application
    Filed: August 26, 2010
    Publication date: September 20, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takayuki Hagita, Takayuki Takashige, Nobuya Nakagawa, Mikihiko Ishii, Takeshi Hirano, Koji Nakano, Masayuki Ishikawa
  • Patent number: 8253020
    Abstract: An object of the present invention is to facilitate welding connection of an enameled wire to a busbar to increase accuracy and reliability of the welding, and inverter-integrated electric compressor by reducing processes of welding operation. In a busbar connection structure for closely contacting, welding and connecting an enameled wire end portion (27A, 28A) of a coil onto an external connection bent surface (35) formed on a busbar (33), a through hole (36, 46) through which the end portion (27A, 28A) of the enameled wire (27, 28) passes is formed on the inside of a base portion of the bent surface (35) of the busbar (33), and the end portion (27A, 28A) of the enameled wire (27, 28) is passed through the through hole (36, 46), positioned onto a welding point (35A) of the bent surface (35), and welded and connected onto the bent surface (35).
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: August 28, 2012
    Assignee: Mitsubishi Heavy Industries Ltd.
    Inventors: Kazuki Niwa, Makoto Hattori, Takayuki Takashige, Atsushi Takai
  • Patent number: 8162627
    Abstract: An integrated-inverter electric compressor is provided, in which a change of the combination of weld plating layers provided on weld surfaces of an electrical connection terminal of an inverter can be allowed for easily. In an integrated-inverter electric compressor in which an inverter is integrally fitted to a compressor housing and an electrical connection terminal that electrically connects the inverter to an electric motor and/or an external power source is provided, one end of the electrical connection terminal has a wire-bonding weld surface for the inverter, the wire-bonding weld surface being provided with a weld plating layer for welding a bonding wire thereto, whereas the other end of the electrical connection terminal has weld surfaces for the electric motor and/or the external power source, the weld surfaces of two sides being respectively provided with different weld plating layers for connecting lead wires, bus bars, or terminals thereto.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: April 24, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Takashi Nakagami, Koji Nakano
  • Patent number: 8159100
    Abstract: There is provided an integrated electric compressor that is improved in reliability. Bus bar connection is employed for electrical connection between a power board 16 and the power source side and between the power board 16 and the motor side, and welding is employed for joining a bus bar to a capacitor 13 and a reactor 14, for joining board-side terminal parts of the bus bar to PN terminals 20a and 20b, and for joining UVW terminals 25a, 25b and 25c to housing-side terminals 28a, 28b and 28c. By employing resistance welding for the welding, the terminals can be joined to each other with stabilized quality. Further, since flat joint plates are provided on one end side of the housing-side terminals 28a, 28b and 28c, and the UVW terminals 25a, 25b and 25c are welded thereto, reliable joints between terminals can also be attained in these portions.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: April 17, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masaharu Tanaka, Koji Nakano, Takashi Nakagami, Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Hiroyuki Kamitani
  • Patent number: 8123490
    Abstract: There is provided an apparatus for controlling an electric compressor, which can actuate the electric compressor rapidly through a simpler and lower-cost configuration while achieving reduction in weight, cost, and assembling time of the electric compressor. In the case where a pressure difference between the inlet side and the outlet side of the compressor body is present when a motor of the electric compressor is actuated, the motor is actuated at a number of revolutions lower than that in the normal mode. Thereby, even if a refrigerant has been liquefied on the outlet side of the compressor body, for example, the motor can be actuated by performing such action as to push out the liquefied refrigerant. In this case, the number of revolutions of the motor is increased by being changed stepwise or linearly, by which the number of revolutions of the motor is caused to reach a required number of revolutions as early as possible while surely performing the actuation.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: February 28, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masahiro Goto, Koji Nakano, Takashi Nakagami, Makoto Hattori, Takayuki Takashige, Kazuki Niwa
  • Publication number: 20120045353
    Abstract: Provided is an inverter-integrated electric compressor in which the layout of a wiring path connected to an IPM is optimized, the wiring path is simplified, and the noise interference due to disturbance is suppressed, thereby improving the controllability. In an inverter-integrated electric compressor in which an inverter box is provided on the outer periphery of a housing accommodating a compressor and a motor, the inverter box integrally accommodating an inverter device, the inverter device includes an IPM constituting an inverter circuit, and UVW output terminals arranged on one side of the IPM are disposed, in the inverter box, so as to face a glass-sealed terminal that applies power from the inverter device to the motor.
    Type: Application
    Filed: September 22, 2010
    Publication date: February 23, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takayuki Watanabe, Hiroyuki Kamitani, Takayuki Takashige, Masayuki Ishikawa, Takeshi Hirano, Yuki Ichise
  • Publication number: 20110243757
    Abstract: The present invention has an object to detect a three-phase AC motor current with high accuracy only with DC input current measuring means to a three-phase PWM inverter, and reduce resonance of a DC power supply by a ripple current in driving an AC motor with a DC current via a three-phase PWM inverter. A carrier wave Cry_e earlier than that of a V phase is used to sample a U phase and a carrier wave Cry_l always later than that of the V phase is used to sample a W phase. Thus, a sampling time sufficiently longer than an interval Ts of the carrier waves Cry_e, Cry_m and Cry_l can be ensured, and the current can be easily detected.
    Type: Application
    Filed: February 18, 2010
    Publication date: October 6, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kenichi Aiba, Takayuki Takashige
  • Publication number: 20110236235
    Abstract: An object is to provide an inverter module that can ensure satisfactory anti-vibration strength, moisture resistance, and isolation for each of the upper and lower boards of the inverter module and that can reduce the weight and cost, and to provide an integrated-inverter electric compressor. In an inverter module (21) in which a power system board (23) and a control board (31) are integrated via a resin case (22), the inverter module (21) is configured such that the power system board (23), on which a semiconductor switching device (24) is mounted, is provided at the lower part of the resin case (22) and the control board (31), on which a control-and-communication circuit is mounted, is provided thereabove.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 29, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa, Takayuki Takashige, Koji Nakano, Takashi Nakagami, Shunsuke Yakushiji
  • Patent number: 8007255
    Abstract: An inverter-integrated electric compressor enhances vibration resistance of an inverter apparatus integrated with a housing without degrading cooling performance, reduction in weight, or the ease of assembly of the inverter apparatus. An inverter-integrated electric compressor has an inverter apparatus integrated with an inverter storage box of housing. The inverter apparatus includes a metal plate secured in an inverter storage box, a plurality of power semiconductor switching elements mounted on the metal plate, a power substrate on which a power-related control circuit for operating the power semiconductor switching elements is mounted, and a busbar assembly formed by integrating a plurality of busbars with an insulator. The metal plate includes a protrusion extending in a width direction perpendicular to a motor shaft direction of an electric motor.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: August 30, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Koji Nakano, Shunsuke Yakushiji
  • Publication number: 20100172764
    Abstract: There is provided an electric compressor that can protect a component to be protected from heat damage according to a capability of the component. The electric compressor 10 includes a compression mechanism 11, an electric motor 12 that drives the compression mechanism 11, and a control portion 13 that controls to drive the electric motor 12, incorporated into a single casing, and further includes a temperature detector 14 that detects a temperature of one or more components that constitute one or both of the control portion 13 and the electric motor 12, and a current detector 15 that detects a current flowing through the component.
    Type: Application
    Filed: June 24, 2008
    Publication date: July 8, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Koji Nakano, Takashi Nakagami, Hideto Noyama, Masahiko Asai, Makoto Hattori, Takayuki Takashige
  • Publication number: 20100086413
    Abstract: There is provided an electric compressor capable of being actuated rapidly. During the time when the operation of an automotive air conditioner is stopping, by heating a motor 12, a refrigerant on the outlet side 11b of a compressor body 11 is heated. Thereby, the temperature of refrigerant on the outlet side 11b is raised, and the refrigerant is prevented from being liquefied on the outlet side 11b of the compressor body 11, by which the automotive air conditioner can be actuated rapidly. Besides, by rotating the motor 12 at the number of revolutions lower than that at the time of normal operation, the refrigerant liquefied on the outlet side lib of the compressor body 11 may be pushed out.
    Type: Application
    Filed: March 14, 2008
    Publication date: April 8, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tadahiro Matsukawa, Takayuki Takashige, Kenichi Aiba, Koji Toyama
  • Publication number: 20100074770
    Abstract: An integrated-inverter electric compressor is provided, in which a change of the combination of weld plating layers provided on weld surfaces of an electrical connection terminal of an inverter can be allowed for easily. In an integrated-inverter electric compressor in which an inverter is integrally fitted to a compressor housing and an electrical connection terminal that electrically connects the inverter to an electric motor and/or an external power source is provided, one end of the electrical connection terminal has a wire-bonding weld surface for the inverter, the wire-bonding weld surface being provided with a weld plating layer for welding a bonding wire thereto, whereas the other end of the electrical connection terminal has weld surfaces for the electric motor and/or the external power source, the weld surfaces of two sides being respectively provided with different weld plating layers for connecting lead wires, bus bars, or terminals thereto.
    Type: Application
    Filed: September 5, 2008
    Publication date: March 25, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Takashi Nakagami, Koji Nakano
  • Publication number: 20100064706
    Abstract: There is provided a control device of a permanent-magnet type synchronous motor that sets a synchronous operation current at start-up in response to a current limiting value determined from the temperature of an inverter that supplies three-phase power to the permanent-magnet type synchronous motor, that monitors an output voltage or an output current of the inverter during a rotation stabilizing period after start-up, and that updates the synchronous operation current using this output voltage or output current.
    Type: Application
    Filed: May 18, 2007
    Publication date: March 18, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige, Koji Nakano, Takashi Nakagami
  • Publication number: 20100024457
    Abstract: The present invention has an object to provide an on-vehicle air conditioner that can prevent breakage or the like caused by applying a high voltage. In an inverter system 20 that controls an operation of a motor 30 of a compressor for the on-vehicle air conditioner, a motor control microcomputer 24 operates by converting a voltage supplied from an on-vehicle battery power source 50 into a low voltage. Thus, the motor control microcomputer 24 is operated to perform failure diagnosis of a high voltage circuit Cb without a high voltage power source 40 being turned on. The failure diagnosis can be performed without power being supplied from the high voltage power source 40 to the high voltage circuit Cb, thereby preventing the high voltage circuit Cb from being broken by applying the high voltage even when there is some failure in the high voltage circuit Cb.
    Type: Application
    Filed: September 28, 2007
    Publication date: February 4, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takehiro Adachi, Koji Nakano, Takashi Nakagami, Makoto Hattori, Kazuki Niwa, Takayuki Takashige
  • Publication number: 20100018243
    Abstract: There is provided an integrated electric compressor that is improved in reliability. Bus bar connection is employed for electrical connection between a power board 16 and the power source side and between the power board 16 and the motor side, and welding is employed for joining a bus bar to a capacitor 13 and a reactor 14, for joining board-side terminal parts of the bus bar to PN terminals 20a and 20b, and for joining UVW terminals 25a, 25b and 25c to housing-side terminals 28a, 28b and 28c. By employing resistance welding for the welding, the terminals can be joined to each other with stabilized quality. Further, since flat joint plates are provided on one end side of the housing-side terminals 28a, 28b and 28c, and the UVW terminals 25a, 25b and 25c are welded thereto, reliable joints between terminals can also be attained in these portions.
    Type: Application
    Filed: September 28, 2007
    Publication date: January 28, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masaharu Tanaka, Koji Nakano, Takashi Nakagami, Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Hiroyuki Kamitani
  • Patent number: 7652902
    Abstract: An object is to provide an integrated-inverter electric compressor that can enhance assembly and vibration resistance of power semiconductor switching devices and control substrates thereof constituting the inverter device. The integrated-inverter electric compressor, in which an inverter device is installed in an inverter container provided on an outer circumference of a housing, includes a plurality of IGBTs constituting the inverter device and a guide member having a plurality of guide holes for passing terminals of the IGBTs provided between the control substrate and the IGBTs. The guide member is provided with at least one first positioning pin, fitted in positioning holes provided in a mounting surface of the IGBT, in one side surface facing the IGBT, and at least one second positioning pin, fitted in positioning holes provided in the control substrate, in another side surface facing the control substrate.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: January 26, 2010
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Koji Nakano, Shunsuke Yakushiji, Makoto Ebisawa
  • Publication number: 20100014988
    Abstract: There is provided an integrated electric compressor having a circuit configuration capable of decreasing the size thereof while restraining current ripples. In an inverter of the electric compressor, by providing a capacitor 13 and a reactor 14 between a power source and an inverter board 12, the ripples of a driving voltage is restrained, and a motor can be driven with high efficiency and the size of a housing can be decreased. Further, by connecting the capacitor 13 and the reactor 14 to a power board 16 by using a bus bar 23, the voltage ripple restraining effect is further increased, and the capacitor 13 and the reactor 14 are unitized integrally by the bus bar 23 to improve the assembling workability of the power board 16.
    Type: Application
    Filed: September 28, 2007
    Publication date: January 21, 2010
    Applicant: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kenji Tsutsui, Makoto Hattori, Takayuki Takashige, Kazuki Niwa, Koji Nakano
  • Publication number: 20090263255
    Abstract: There is provided an apparatus for controlling an electric compressor, which can actuate the electric compressor rapidly through a simpler and lower-cost configuration while achieving reduction in weight, cost, and assembling time of the electric compressor. In the case where a pressure difference between the inlet side and the outlet side of the compressor body is present when a motor of the electric compressor is actuated, the motor is actuated at a number of revolutions lower than that in the normal mode. Thereby, even if a refrigerant has been liquefied on the outlet side of the compressor body, for example, the motor can be actuated by performing such action as to push out the liquefied refrigerant. In this case, the number of revolutions of the motor is increased by being changed stepwise or linearly, by which the number of revolutions of the motor is caused to reach a required number of revolutions as early as possible while surely performing the actuation.
    Type: Application
    Filed: September 28, 2007
    Publication date: October 22, 2009
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masahiro Goto, Koji Nakano, Takashi Nakagami, Makoto Hattori, Takayuki Takashige, Kazuki Niwa