Patents by Inventor Tatsuro Sakamoto

Tatsuro 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: 11201538
    Abstract: Provided is a power conversion device capable of directly performing a protection operation according to the state of a cooler. A control unit includes: a semiconductor switching element loss calculation unit which calculates a loss in a semiconductor switching element with use of a switching state of the semiconductor switching element, and a current detection value or a voltage detection value; and a cooler state estimation unit which estimates a state of a cooler on the basis of a loss calculation value from the semiconductor switching element loss calculation unit and a temperature detection value from a temperature detector. The control unit limits current flowing to the semiconductor switching element on the basis of the state of the cooler.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: December 14, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventor: Tatsuro Sakamoto
  • Publication number: 20210366813
    Abstract: This power semiconductor module includes: a bus bar to which each of first main electrodes of semiconductor switching elements is joined; a heat-dissipating metal substrate to which each of second main electrodes of the semiconductor switching elements is joined; and a control gate terminal connected to each of gate pads of the semiconductor switching elements by a bonding wire, wherein at least two of the plurality of semiconductor switching elements are arranged adjacently to each other on the heat-dissipating metal substrate and electrically connected in parallel to form one arm.
    Type: Application
    Filed: January 29, 2021
    Publication date: November 25, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventor: Tatsuro SAKAMOTO
  • Publication number: 20210166863
    Abstract: An object is to increase an inductance value without blocking a leakage magnetic flux and improve cooling performance by directly cooling a coil and a core by a cooler via cooling members. Winding cooling portions for cooling the coil are in contact with a cooler via coil cooling members formed by non-fluid material, core cooling portions for cooling the core are in contact with the cooler via core cooling members formed by non-fluid material, and a resin mold member covering the coil and the core retains the coil and the core and fixes the coil and the core to the cooler.
    Type: Application
    Filed: October 16, 2020
    Publication date: June 3, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventor: Tatsuro Sakamoto
  • Publication number: 20210143745
    Abstract: A power conversion device which is premised on converting electric power supplied from a power source with use of a magnetic component, includes: a plurality of bus bars configured to supply electric power to a load; current sensor elements which are respectively provided for the plurality of bus bars, and are configured to detect magnetic fluxes generated when electric currents flow through the plurality of bus bars; and a plate-like magnetic shield plate which is arranged on a straight line connecting the magnetic component and the current sensor element, and is configured to shield magnetic fluxes directed from the magnetic component to one or more current sensor elements.
    Type: Application
    Filed: April 1, 2019
    Publication date: May 13, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventor: Tatsuro SAKAMOTO
  • Publication number: 20200382003
    Abstract: Provided is a power conversion device capable of directly performing a protection operation according to the state of a cooler. A control unit includes: a semiconductor switching element loss calculation unit which calculates a loss in a semiconductor switching element with use of a switching state of the semiconductor switching element, and a current detection value or a voltage detection value; and a cooler state estimation unit which estimates a state of a cooler on the basis of a loss calculation value from the semiconductor switching element loss calculation unit and a temperature detection value from a temperature detector. The control unit limits current flowing to the semiconductor switching element on the basi3 of the state of the cooler.
    Type: Application
    Filed: March 23, 2020
    Publication date: December 3, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Tatsuro SAKAMOTO
  • Publication number: 20200203064
    Abstract: A power conversion device includes an isolation transformer, the isolation transformer including: a primary winding; a secondary winding; and a magnetic shield portion configured to suppress magnetic interference between the primary winding and the secondary winding by interrupting a magnetic flux generated by a current flowing through each of the primary winding and the secondary winding. The magnetic shield portion is formed of, for example, a magnetic shield plate arranged between the primary winding and the secondary winding.
    Type: Application
    Filed: April 9, 2018
    Publication date: June 25, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Tatsuro SAKAMOTO
  • Publication number: 20130120667
    Abstract: According to one embodiment, a remote control apparatus includes a first input module, a second input module, a transmit/receive module and a controller. The first input module is configured to input a gesture pattern. The second input module is configured to input starting of an application. The transmit/receive module is configured to transmit information on the gesture pattern and to transmit or receive a command. The controller is configured to activate the first input module if starting of a particular application is input via the second input module, to transmit a command requesting specification of an operation mode for the starting of the particular application after touch-on via the first input module, and to set the operation mode based on reception of a command specifying the operation mode.
    Type: Application
    Filed: January 10, 2013
    Publication date: May 16, 2013
    Inventor: Tatsuro Sakamoto
  • Publication number: 20110079450
    Abstract: According to one embodiment, a small device includes a first touchpad, a second touchpad, a board and a housing. The first touchpad has a first input surface on a surface of the first touchpad. The second touchpad has a second input surface on a surface of the second touchpad. The second input surface allows a rubbing operation continuing from the first input surface of the first touchpad. The board has a first detector configured to detect push-down input from the first touchpad and second detector configured to detect input by the rubbing operation. The first detector is provided at a position where the first detection section is opposed to the first touchpad. The second detector is provided at a position where the second detection section is opposed to the second touchpad. The housing positions the second touchpad and the board and covers the board.
    Type: Application
    Filed: July 16, 2010
    Publication date: April 7, 2011
    Inventor: Tatsuro Sakamoto
  • Publication number: 20110080253
    Abstract: According to one embodiment, a remote control apparatus includes a first input module, a second input module, a transmit/receive module and a controller. The first input module is configured to input a gesture pattern. The second input module is configured to input starting of an application. The transmit/receive module is configured to transmit information on the gesture pattern and to transmit or receive a command. The controller is configured to activate the first input module if starting of a particular application is input via the second input module, to transmit a command requesting specification of an operation mode for the starting of the particular application after touch-on via the first input module, and to set the operation mode based on reception of a command specifying the operation mode.
    Type: Application
    Filed: August 16, 2010
    Publication date: April 7, 2011
    Inventor: Tatsuro Sakamoto
  • Publication number: 20100329645
    Abstract: According to one embodiment, a program recording apparatus is provided, which includes a storage configured to hold files, a console module configured to select a program when operated, a reception processing circuit configured to play back the program selected at the console module, while receiving the program, a presence detection sensor configured to detect a non-viewed state in which the program being played back by the reception processing circuit is not viewed, and a recording controller configured to record the program selected, as a file, in the storage, and to erase the file of the program from the storage if the program is confirmed not set to a non-viewed state before the program comes to an end.
    Type: Application
    Filed: June 17, 2010
    Publication date: December 30, 2010
    Inventor: Tatsuro Sakamoto
  • Publication number: 20100225017
    Abstract: The object of the present invention is to provide a method for producing a thermally expandable base material for vehicle interior enabling production of an interior material for vehicle that is lightweight and has sufficient sound-absorbing properties, high stiffness and the like, and a method for producing a base material for vehicle interior. The present method for producing a thermally expandable base material for vehicle interior is characterized by comprising: mixing a synthetic resin emulsion, a thermally expandable microcapsule emulsion, and a resin-based adhesive emulsion; impregnating an inorganic fiber mat with the emulsion mixture; drying the mat at a temperature lower than a thermal expansion starting point of the thermally expandable microcapsule; heating the mat at a temperature at which a synthetic resin powder melts and which is lower than the thermal expansion starting point of the thermally expandable microcapsule; hot-pressing and cooling the mat.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 9, 2010
    Inventors: Yukihiro Nakagawa, Noriaki Nakagawa, Goro Takahashi, Tatsuro Sakamoto