Patents by Inventor Tadakazu HARADA

Tadakazu HARADA 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: 10399442
    Abstract: A solar battery system includes a first electronic control unit disposed in a vehicle cabin of a vehicle, the first electronic control unit including a control unit repeating a charging period and a stop period during a period of time from ignition-off to ignition-on of the vehicle, the charging period being a period of charging the electric storage device with generated electric power of a solar battery, the stop period being a period of stopping the charging of the electric storage device with the generated electric power of the solar battery. The control unit sets a length of each of the charging periods shorter as the temperature in the vehicle cabin is higher at the time of starting each of the charging periods.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: September 3, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tadakazu Harada
  • Patent number: 10348202
    Abstract: A modular dc-dc boost converter system is provided that can substantially improve efficiency over a wide range of input and output voltages. The system includes three modules: a buck module, a boost module, and a dc transformer module. These modules are interconnected such that the system output voltage is equal to the sum of the output voltages of adc-dc converter module and a dc transformer module. Depending on the operating point, one or more modules may operate in passthrough mode, leading to substantially reduced ac losses. The required capacitor size and the transistor voltage ratings are also substantially reduced, relative to a conventional single dc-dc boost converter operating at the same input and output voltages.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: July 9, 2019
    Assignee: The Regents of the University of Colorado, a body corporate
    Inventors: Hua Chen, Robert Warren Erickson, Dragan Maksimovic, Tadakazu Harada
  • Publication number: 20190126812
    Abstract: A headlight control system controls a headlight of a moving object. The moving object includes the headlight including a plurality of light emission units, and an imaging unit configured to capture images of circumstances in front. The headlight control system includes an irradiation pattern controller configured to perform control for changing at least one of presence or absence of light emission and a degree of light emission of each of the light emission units to change an irradiation pattern of the headlight to one of a plurality of irradiation patterns, an imaging controller configured to perform control such that the imaging unit captures the images of the circumstances in front for each of the irradiation patterns to acquire captured images, and a learning unit configured to learn an irradiation pattern suitable for the circumstances in front based on captured images captured for each of the irradiation patterns.
    Type: Application
    Filed: August 23, 2018
    Publication date: May 2, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tadakazu HARADA
  • Publication number: 20180026540
    Abstract: A modular dc-dc boost converter system is provided that can substantially improve efficiency over a wide range of input and output voltages. The system includes three modules: a buck module, a boost module, and a dc transformer module. These modules are interconnected such that the system output voltage is equal to the sum of the output voltages of adc-dc converter module and a dc transformer module. Depending on the operating point, one or more modules may operate in passthrough mode, leading to substantially reduced ac losses. The required capacitor size and the transistor voltage ratings are also substantially reduced, relative to a conventional single dc-dc boost converter operating at the same input and output voltages.
    Type: Application
    Filed: April 3, 2017
    Publication date: January 25, 2018
    Inventors: Hua Chen, Robert Warren Erickson, Dragan Maksimovic, Tadakazu Harada
  • Publication number: 20170267113
    Abstract: A solar battery system includes a first electronic control unit disposed in a vehicle cabin of a vehicle, the first electronic control unit including a control unit repeating a charging period and a stop period during a period of time from ignition-off to ignition-on of the vehicle, the charging period being a period of charging the electric storage device with generated electric power of a solar battery, the stop period being a period of stopping the charging of the electric storage device with the generated electric power of the solar battery. The control unit sets a length of each of the charging periods shorter as the temperature in the vehicle cabin is higher at the time of starting each of the charging periods.
    Type: Application
    Filed: March 14, 2017
    Publication date: September 21, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tadakazu HARADA
  • Patent number: 9614442
    Abstract: A modular dc-dc boost converter system is provided that can substantially improve efficiency over a wide range of input and output voltages. The system includes three modules: a buck module, a boost module, and a dc transformer module. These modules are interconnected such that the system output voltage is equal to the sum of the output voltages of adc-dc converter module and a dc transformer module. Depending on the operating point, one or more modules may operate in passthrough mode, leading to substantially reduced ac losses. The required capacitor size and the transistor voltage ratings are also substantially reduced, relative to a conventional single dc-dc boost converter operating at the same input and output voltages.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: April 4, 2017
    Assignee: The Regents of the University of Colorado, A Body Corporate
    Inventors: Hua Chen, Robert Warren Erickson, Jr., Dragan Maksimovic, Tadakazu Harada
  • Publication number: 20150303815
    Abstract: A modular dc-dc boost converter system is provided that can substantially improve efficiency over a wide range of input and output voltages. The system includes three modules: a buck module, a boost module, and a dc transformer module. These modules are interconnected such that the system output voltage is equal to the sum of the output voltages of adc-dc converter module and a dc transformer module. Depending on the operating point, one or more modules may operate in passthrough mode, leading to substantially reduced ac losses. The required capacitor size and the transistor voltage ratings are also substantially reduced, relative to a conventional single dc-dc boost converter operating at the same input and output voltages.
    Type: Application
    Filed: April 16, 2015
    Publication date: October 22, 2015
    Inventors: Hua Chen, Robert Warren Erickson, JR., Dragan Maksimovic, Tadakazu Harada
  • Patent number: 8604608
    Abstract: A semiconductor module is disclosed that includes a semiconductor element, a capacitor configured to be electrically connected to the semiconductor element and a heat sink, wherein the semiconductor and the capacitor are stacked with each other via the heat sink, and wherein the semiconductor element is disposed in a position overlapping with the capacitor as viewed from a stack direction.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: December 10, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Jiro Tsuchiya, Torahiko Sasaki, Makoto Imai, Hideki Tojima, Tadakazu Harada, Tomoaki Mitsunaga
  • Publication number: 20130009168
    Abstract: A semiconductor module is disclosed that includes a semiconductor element, a capacitor configured to be electrically connected to the semiconductor element and a heat sink, wherein the semiconductor and the capacitor are stacked with each other via the heat sink, and wherein the semiconductor element is disposed in a position overlapping with the capacitor as viewed from a stack direction.
    Type: Application
    Filed: April 17, 2012
    Publication date: January 10, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Jiro TSUCHIYA, Torahiko SASAKI, Makoto IMAI, Hideki TOJIMA, Tadakazu HARADA, Tomoaki MITSUNAGA