Patents by Inventor Toshihisa Shimizu

Toshihisa Shimizu 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: 11264806
    Abstract: An operation voltage control circuit device includes a column of selective electrical conduction elements connected in series, a column of capacitors connected in parallel to the selective electrical conduction elements, inverted voltage generation units alternately inserted between the selective electrical conduction elements and the capacitors, and electrode connection terminals connected in parallel to the capacitors between a pair of output terminals and connected to power supply cells connected in series to each other. The column of the selective electrical conduction elements are alternately grouped and are controlled to be alternately switched to an electrical conduction state or a cutoff state.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: March 1, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo Metropolitan Public University Corporation
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Patent number: 11107936
    Abstract: An output voltage control circuit device includes a rectifying unit configured to permit a flow of a current from a negative electrode side to a positive electrode side of a power supply cell, a voltage generation unit, through which a current is able to flow in both directions between both ends inserted between a negative electrode of an odd-numbered power supply cell counted from the negative electrode side of the power supply cells and an anode of the rectifying unit, and a generated voltage between both ends is able to be cyclically inverted; a voltage holding capacitor, and a voltage control circuit unit configured to generate a voltage, a direction of which is cyclically inverted, between both ends of the voltage generation unit on the negative electrode side of the power supply cells.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: August 31, 2021
    Assignees: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan University
    Inventors: Shinichi Urabe, Kazuki Obata, Toshihisa Shimizu
  • Publication number: 20210066924
    Abstract: An operation voltage control circuit device includes a column of selective electrical conduction elements connected in series, a column of capacitors connected in parallel to the selective electrical conduction elements, inverted voltage generation units alternately inserted between the selective electrical conduction elements and the capacitors, and electrode connection terminals connected in parallel to the capacitors between a pair of output terminals and connected to power supply cells connected in series to each other. The column of the selective electrical conduction elements are alternately grouped and are controlled to be alternately switched to an electrical conduction state or a cutoff state.
    Type: Application
    Filed: August 26, 2020
    Publication date: March 4, 2021
    Applicants: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan Public University Corporation
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Publication number: 20200321482
    Abstract: An output voltage control circuit device includes a rectifying unit configured to permit a flow of a current from a negative electrode side to a positive electrode side of a power supply cell, a voltage generation unit, through which a current is able to flow in both directions between both ends inserted between a negative electrode of an odd-numbered power supply cell counted from the negative electrode side of the power supply cells and an anode of the rectifying unit, and a generated voltage between both ends is able to be cyclically inverted; a voltage holding capacitor, and a voltage control circuit unit configured to generate a voltage, a direction of which is cyclically inverted, between both ends of the voltage generation unit on the negative electrode side of the power supply cells.
    Type: Application
    Filed: March 19, 2020
    Publication date: October 8, 2020
    Applicants: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan University
    Inventors: Shinichi Urabe, Kazuki Obata, Toshihisa Shimizu
  • Patent number: 10483763
    Abstract: In a photovoltaic device or an operating point control circuit in which a current is output from a corresponding power supply cell or capacitor to between output terminals by periodically cutting off switching elements which are connected in series to a plurality of power supply cells and/or capacitors connected in series between the output terminals via inductors, cutoff duty ratios of all the switching elements are uniformly fixed to the same value in one cycle in which all the switching elements are cut off once.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: November 19, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan University
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Patent number: 10326271
    Abstract: A solar power generation system includes: solar cells, or solar cells and at least one capacitor, connected in series between output terminals; an accompanying circuit provided for each of the solar cells, or each of the solar cells and each of the at least one capacitor, the accompanying circuit including an inductor and a switching device arranged in series; and a power generation operating point control device. The solar cells, or the solar cells and the at least one capacitor, are divided into units, of which adjacent units share one of the solar cells or one of the at least one capacitor. The power generation operating point control device is provided for each of the units, and is configured to control connection and disconnection of the switching device so as to optimize power generating capacity of the unit for which the power generation operating point control device is provided.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: June 18, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOKYO METROPOLITAN UNIVERSITY
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Patent number: 9935466
    Abstract: Three or more photovoltaic cell units connected in series include a unit holding a voltage between output terminals, a first voltage holding unit group having a voltage holding unit holding a voltage between an anode-side terminal and a cathode-side terminal for each photovoltaic cell unit set with respect to each set of the (2k+1)th and (2k+2)th photovoltaic cell units connected in series to each other counted from the anode side, and a second voltage holding unit group having a voltage holding unit holding a voltage between an anode-side terminal and a cathode-side terminal for each photovoltaic cell unit set with respect to each set of the (2k+2)th and (2k+3)th photovoltaic cell units connected in series to each other counted from the anode side.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 3, 2018
    Assignees: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan University
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Publication number: 20180062392
    Abstract: In a photovoltaic device or an operating point control circuit in which a current is output from a corresponding power supply cell or capacitor to between output terminals by periodically cutting off switching elements which are connected in series to a plurality of power supply cells and/or capacitors connected in series between the output terminals via inductors, cutoff duty ratios of all the switching elements are uniformly fixed to the same value in one cycle in which all the switching elements are cut off once.
    Type: Application
    Filed: August 10, 2017
    Publication date: March 1, 2018
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Publication number: 20170373497
    Abstract: A solar power generation system includes: solar cells, or solar cells and at least one capacitor, connected in series between output terminals; an accompanying circuit provided for each of the solar cells, or each of the solar cells and each of the at least one capacitor, the accompanying circuit including an inductor and a switching device arranged in series; and a power generation operating point control device. The solar cells, or the solar cells and the at least one capacitor, are divided into units, of which adjacent units share one of the solar cells or one of the at least one capacitor. The power generation operating point control device is provided for each of the units, and is configured to control connection and disconnection of the switching device so as to optimize power generating capacity of the unit for which the power generation operating point control device is provided.
    Type: Application
    Filed: June 22, 2017
    Publication date: December 28, 2017
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOKYO METROPOLITAN UNIVERSITY
    Inventors: Shinichi URABE, Toshihisa SHIMIZU
  • Patent number: 9672965
    Abstract: A reactor includes a laminated core formed by laminating soft-magnetic ribbons in a lamination direction. The laminated core has a gap formed across a magnetic path direction in the laminated core. The laminated core also has a flat facing surface that faces the gap and a pair of flat side surfaces that are respectively on opposite sides of the facing surface in the lamination direction. The laminated core further has a pair of first corner curved surfaces that are formed between the facing surface and the pair of side surfaces. Each of the first corner curved surfaces has a width in the lamination direction greater than the thickness of each of the soft-magnetic ribbons. For each of the first corner curved surfaces, a length of the first corner curved surface in the magnetic path direction is greater than the width of the first corner curved surface in the lamination direction.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: June 6, 2017
    Assignees: DENSO CORPORATION, TOKYO METROPOLITAN UNIVERSITY
    Inventors: Takahiro Tera, Hiroshi Taki, Toshihisa Shimizu
  • Publication number: 20170085088
    Abstract: An electric power generation operation point control circuit device includes: a first capacitor connected in parallel to a photovoltaic cell via the pair of electrode connection terminals between the pair of output terminals; a first switching element connected in parallel to the photovoltaic cell via the pair of electrode connection terminals and the inductor between the pair of output terminals and causing a conduction state or a non-conduction state between the connected terminals; and a second capacitor connected in series to the first capacitor between a first electrode connection terminal and a first output terminal and causing the conduction state or the non-conduction state between the connected terminals.
    Type: Application
    Filed: September 16, 2016
    Publication date: March 23, 2017
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Publication number: 20170085092
    Abstract: Three or more photovoltaic cell units connected in series include a unit holding a voltage between output terminals, a first voltage holding unit group having a voltage holding unit holding a voltage between an anode-side terminal and a cathode-side terminal for each photovoltaic cell unit set with respect to each set of the (2k+1)th and (2k+2)th photovoltaic cell units connected in series to each other counted from the anode side, and a second voltage holding unit group having a voltage holding unit holding a voltage between an anode-side terminal and a cathode-side terminal for each photovoltaic cell unit set with respect to each set of the (2k+2)th and (2k+3)th photovoltaic cell units connected in series to each other counted from the anode side.
    Type: Application
    Filed: September 16, 2016
    Publication date: March 23, 2017
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Patent number: 9602049
    Abstract: In a circuit device controlling an operating point of each of two or more series-connected photovoltaic cells or other power supply cells in a module, the output voltage of the module can be boosted without reducing the generated electric power. The operating point control circuit device includes capacitors connected in parallel to the respective series-connected cells, switching elements connected in parallel to the respective series-connected cells through an inductor, an additional capacitor connected in series to the capacitor row, and an additional switching element connected in series to the switching element row. The switching elements are controlled to shut off electrical conduction between the corresponding terminals connected thereto in the same predetermined cycle and in mutually different periods so as to always establish a condition that one switching element is in the non-conductive state and the others are is in the conductive state.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: March 21, 2017
    Assignees: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan University
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Publication number: 20160322931
    Abstract: In a circuit device controlling an operating point of each of two or more series-connected photovoltaic cells or other power supply cells in a module, the output voltage of the module can be boosted without reducing the generated electric power. The operating point control circuit device includes capacitors connected in parallel to the respective series-connected cells, switching elements connected in parallel to the respective series-connected cells through an inductor, an additional capacitor connected in series to the capacitor row, and an additional switching element connected in series to the switching element row. The switching elements are controlled to shut off electrical conduction between the corresponding terminals connected thereto in the same predetermined cycle and in mutually different periods so as to always establish a condition that one switching element is in the non-conductive state and the others are is in the conductive state.
    Type: Application
    Filed: April 27, 2016
    Publication date: November 3, 2016
    Applicants: Toyota Jidosha Kabushiki Kaisha, Tokyo Metropolitan University
    Inventors: Shinichi Urabe, Toshihisa Shimizu
  • Publication number: 20150332825
    Abstract: A reactor includes a laminated core formed by laminating soft-magnetic ribbons in a lamination direction. The laminated core has a gap formed across a magnetic path direction in the laminated core. The laminated core also has a flat facing surface that faces the gap and a pair of flat side surfaces that are respectively on opposite sides of the facing surface in the lamination direction. The laminated core further has a pair of first corner curved surfaces that are formed between the facing surface and the pair of side surfaces. Each of the first corner curved surfaces has a width in the lamination direction greater than the thickness of each of the soft-magnetic ribbons. For each of the first corner curved surfaces, a length of the first corner curved surface in the magnetic path direction is greater than the width of the first corner curved surface in the lamination direction.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Takahiro TERA, Hiroshi TAKI, Toshihisa SHIMIZU
  • Patent number: 8138744
    Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: March 20, 2012
    Assignees: Honda Motor Co., Ltd.
    Inventors: Masao Nagano, Mitsuaki Hirakawa, Toshihisa Shimizu
  • Publication number: 20100320982
    Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.
    Type: Application
    Filed: August 4, 2010
    Publication date: December 23, 2010
    Inventors: Masao NAGANO, Mitsuaki HIRAKAWA, Toshihisa SHIMIZU
  • Patent number: 7808355
    Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: October 5, 2010
    Assignees: Honda Motor Co., Ltd.
    Inventors: Masao Nagano, Mitsuaki Hirakawa, Toshihisa Shimizu
  • Publication number: 20080297126
    Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.
    Type: Application
    Filed: February 5, 2008
    Publication date: December 4, 2008
    Inventors: Masao Nagano, Mitsuaki Hirakawa, Toshihisa Shimizu
  • Patent number: 5946606
    Abstract: The present invention provides an internal wrap test circuit in a radio equipment which is capable of conducting an internal wrap test, which radio equipment including two transmitting systems in which a transmission signal is amplified by a power amplifier and the amplified transmission signal is outputted in such a manner as to be changed over by a changeover switch to first and second circulators respectively connected to a first antenna and a second antenna, and two receiving systems in which received signals inputted through the first and second antennas are respectively transmitted to a first low noise amplifier and a second low noise amplifier via said first and second circulators, respectively, wherein the internal wrap test circuit includes a local oscillator which is connected to the power amplifier and to the first and second low noise amplifiers so as to control each gain of the power amplifier and the first and second low noise amplifiers, and the transmission signal is lowered to a fixed level t
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: August 31, 1999
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Toshihisa Shimizu