Patents by Inventor Kazuyasu Sakamoto

Kazuyasu Sakamoto 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: 9479032
    Abstract: The rotary electric machine main body includes: a stator; a rotor that includes a rotating shaft and that is rotatable relative to the stator; and a supporting body that supports the stator and the rotor. The controlling apparatus includes a power circuit portion that is disposed around the rotating shaft, and that converts electric power that is received from the rotary electric machine main body or electric power that is supplied to the rotary electric machine main body between alternating current and direct current. The power circuit portion includes: a power module; and an electric power interconnecting part that includes a conductor that is connected to a terminal of the power module. The electric power interconnecting part is disposed so as to avoid overlapping with a region of the power module when the power circuit portion is viewed in an axial direction of the rotating shaft.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: October 25, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Kato, Masahiko Fujita, Kazuyasu Sakamoto
  • Patent number: 9401319
    Abstract: A semiconductor device is provided, in which a first lead (11) is joined with the bottom electrode (23) of a MOS-FET (21) with first solder (51), the top electrode (22) of the MOS-FET is joined with an internal lead (31) with second solder (52), the internal lead is joined with a projection (61) of a second lead with third solder (53), and the first lead, second lead, MOS-FET and internal lead are integrally molded using sealing resin (41), wherein the first solder and second solder include support members (54) and (55), respectively, located thereinside and positions of the internal lead and MOS-FET are stabilized by self-alignment.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: July 26, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Oga, Kazuyasu Sakamoto, Tsuyoshi Sugihara, Masaki Kato, Daisuke Nakashima, Tsuyoshi Jida, Gen Tada
  • Patent number: 9006879
    Abstract: The invention is to provide a semiconductor apparatus configured to position a semiconductor device reliably and easily without having a protruding portion formed in the bottom surface of the semiconductor device in the semiconductor apparatus. A semiconductor apparatus is fabricated by attaching a semiconductor device of a surface mount package type and a wiring member to a heat sink. A fitting portion in which the semiconductor device is fit is provided to the wiring member, so that the semiconductor device is positioned by fitting the semiconductor device into the fitting portion provided to the wiring member. According to the semiconductor apparatus of the invention, it becomes possible to position the semiconductor device at a high degree of accuracy.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: April 14, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Kato, Masahiko Fujita, Kazuyasu Sakamoto
  • Publication number: 20130307130
    Abstract: A semiconductor device is provided, in which a first lead (11) is joined with the bottom electrode (23) of a MOS-FET (21) with first solder (51), the top electrode (22) of the MOS-FET is joined with an internal lead (31) with second solder (52), the internal lead is joined with a projection (61) of a second lead with third solder (53), and the first lead, second lead, MOS-FET and internal lead are integrally molded using sealing resin (41), wherein the first solder and second solder include support members (54) and (55), respectively, located thereinside and positions of the internal lead and MOS-FET are stabilized by self-alignment.
    Type: Application
    Filed: June 9, 2011
    Publication date: November 21, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takuya Oga, Kazuyasu Sakamoto, Tsuyoshi Sugihara, Masaki Kato, Daisuke Nakashima, Tsuyoshi Jida, Gen Tada
  • Publication number: 20130187497
    Abstract: The rotary electric machine main body includes: a stator; a rotor that includes a rotating shaft and that is rotatable relative to the stator; and a supporting body that supports the stator and the rotor. The controlling apparatus includes a power circuit portion that is disposed around the rotating shaft, and that converts electric power that is received from the rotary electric machine main body or electric power that is supplied to the rotary electric machine main body between alternating current and direct current. The power circuit portion includes: a power module; and an electric power interconnecting part that includes a conductor that is connected to a terminal of the power module. The electric power interconnecting part is disposed so as to avoid overlapping with a region of the power module when the power circuit portion is viewed in an axial direction of the rotating shaft.
    Type: Application
    Filed: January 6, 2011
    Publication date: July 25, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masaki Kato, Masahiko Fujita, Kazuyasu Sakamoto
  • Patent number: 8299666
    Abstract: A dynamoelectric machine main body, power circuit modules and a field circuit module, and a control apparatus that has a heatsink that is prepared by die casting, and that is mounted integrally onto the dynamoelectric machine main body are included, the heatsink including a plurality of convex heat receiving portions that are disposed so as to project from a front surface of a base plate, and that have heat receiving surfaces, the power circuit modules and the field circuit module including seal main body portions that are constituted by an electrically insulating resin that seal switching elements so as to expose bottom surfaces of element heat radiating portions on reference surfaces that have a surface shape that corresponds to a shape of the heat receiving surfaces, and electrical insulation supporting layers being interposed between the bottom surfaces of the heat receiving surfaces and the element heat radiating portions.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: October 30, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Shirakata, Dai Nakajima, Masahiko Fujita, Masaki Kato, Kazuyasu Sakamoto, Takuya Oga
  • Publication number: 20110254148
    Abstract: The invention is to provide a semiconductor apparatus configured to position a semiconductor device reliably and easily without having a protruding portion formed in the bottom surface of the semiconductor device in the semiconductor apparatus. A semiconductor apparatus is fabricated by attaching a semiconductor device of a surface mount package type and a wiring member to a heat sink. A fitting portion in which the semiconductor device is fit is provided to the wiring member, so that the semiconductor device is positioned by fitting the semiconductor device into the fitting portion provided to the wiring member. According to the semiconductor apparatus of the invention, it becomes possible to position the semiconductor device at a high degree of accuracy.
    Type: Application
    Filed: October 20, 2010
    Publication date: October 20, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masaki KATO, Masahiko FUJITA, Kazuyasu SAKAMOTO
  • Publication number: 20110175496
    Abstract: A dynamoelectric machine main body, power circuit modules and a field circuit module, and a control apparatus that has a heatsink that is prepared by die casting, and that is mounted integrally onto the dynamoelectric machine main body are included, the heatsink including a plurality of convex heat receiving portions that are disposed so as to project from a front surface of a base plate, and that have heat receiving surfaces, the power circuit modules and the field circuit module including seal main body portions that are constituted by an electrically insulating resin that seal switching elements so as to expose bottom surfaces of element heat radiating portions on reference surfaces that have a surface shape that corresponds to a shape of the heat receiving surfaces, and electrical insulation supporting layers being interposed between the bottom surfaces of the heat receiving surfaces and the element heat radiating portions.
    Type: Application
    Filed: June 21, 2010
    Publication date: July 21, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuji SHIRAKATA, Dai Nakajima, Masahiko Fujita, Masaki Kato, Kazuyasu Sakamoto, Takuya Oga