Patents by Inventor Kazuyoshi Obayashi

Kazuyoshi Obayashi 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).

  • Publication number: 20220169193
    Abstract: A power supply system having a plurality of power systems is provided with a power output section in each of the power systems, an electrical load in each of the power systems, operating from power supplied by the power output section, main paths that connect the power output sections of adjacent ones of the power systems, an inter-system switch that establishes a conducting condition between the adjacent power systems by being turned on and establishes a disconnected condition between the adjacent power systems by being turned off, and an intra-system switch in each of the power systems, which is disposed on the main path between the power output section and the inter-system switch, and which establishes a conducting condition between the power output section and the electrical load by being turned on and establishes a disconnected condition between the power output section and the electrical load by being turned off.
    Type: Application
    Filed: February 16, 2022
    Publication date: June 2, 2022
    Applicant: DENSO CORPORATION
    Inventors: Koji MAZAKI, Kazuyoshi OBAYASHI, Tadatoshi ASADA
  • Publication number: 20220149665
    Abstract: A power supplying device includes a power transmission circuit transmitting AC power and a power transmission resonance circuit including a power transmission coil. A power receiving device includes a power reception resonance circuit including a power reception coil. When a coupling coefficient between the power transmission coil and the power reception coil is a predetermined coupling coefficient, resonance of a first resonance mode having a first resonance frequency and a second resonance mode having a second resonance frequency are generated, a resonance frequency of the power transmission resonance circuit and the power reception resonance circuit is set to a value which is one of the first and second resonance frequencies, and the set value is a frequency deviating from a reference resonance frequency of the power transmission resonance circuit alone by a predetermined deviation frequency or more. A driving frequency of the AC power is set to the set value.
    Type: Application
    Filed: January 25, 2022
    Publication date: May 12, 2022
    Applicant: DENSO CORPORATION
    Inventors: Kazuyoshi OBAYASHI, Nobuhisa YAMAGUCHI
  • Publication number: 20220032778
    Abstract: In an in-motion power supply system with a plurality of power supply segments to supply power to a vehicle, a vehicle position detection unit detects a position of the vehicle relative to each segment. An electrical characteristic acquisition unit acquires electrical characteristics in the segment involved in power transfer, and an abnormality determination unit uses the electrical characteristics to determine whether there is an abnormality in the segment involved in power transfer.
    Type: Application
    Filed: October 19, 2021
    Publication date: February 3, 2022
    Applicant: DENSO CORPORATION
    Inventors: Masaki KANESAKI, Mitsuru SHIBANUMA, Hayato SUMIYA, Takuya KIGUCHI, Eisuke TAKAHASHI, Shinpei TAKITA, Masaya TAKAHASHI, Kazuhiro UDA, Yuusei NAKAYASHIKI, Kazuyoshi OBAYASHI, Nobuhisa YAMAGUCHI
  • Publication number: 20220011379
    Abstract: A power supply system for moving body includes a first power source, a first current path, a second power source, a second current path. The first power source supplies electric power to a redundant load. The first current path connects the first power source and the redundant load. The second power source supplies electric power to the redundant load. The second current path connects the second power source and the redundant load.
    Type: Application
    Filed: September 23, 2021
    Publication date: January 13, 2022
    Applicant: DENSO CORPORATION
    Inventors: Kazuyoshi OBAYASHI, Masaya TAKAHASHI, Naoki KATAYAMA
  • Publication number: 20210402939
    Abstract: A power supply system for a mobile object, includes a normal power supply, a normal current path connected to the normal power supply, a redundant power supply, a redundant current path connected to the redundant power supply. The power supply system further includes a first current path connected to a first redundant load, and a second current path disposed in parallel with the first current path and connected to a second redundant load. The power supply system further includes a path switch including a first normal switch and a second normal switch, and a controller controlling the path switch. The normal power supply is connected to a normal load, and is connectable to at least one of the first redundant load and the second redundant load.
    Type: Application
    Filed: September 13, 2021
    Publication date: December 30, 2021
    Applicant: DENSO CORPORATION
    Inventors: Kazuyoshi OBAYASHI, Naoki KATAYAMA
  • Publication number: 20210391757
    Abstract: A dynamic wireless power transfer system performs, through a plurality of primary coils installed along a traveling direction of a road and a secondary coil mounted in a vehicle, power transfer to the vehicle while the vehicle is traveling. The secondary coil is an M-phase coil including M coils, M denoting an integer which is two or higher. The M coils each include a coil end extending along a front-rear direction of the vehicle and a main coil portion extending along a width direction of the vehicle, the M coils each being configured such that a magnetic resistance of a magnetic path where a magnetic flux of the coil end passes is higher than a magnetic resistance of a magnetic path where a magnetic flux of the main coil portion passes.
    Type: Application
    Filed: August 30, 2021
    Publication date: December 16, 2021
    Applicant: DENSO CORPORATION
    Inventors: Takuya KIGUCHI, Nobuhisa YAMAGUCHI, Eisuke TAKAHASHI, Hayato SUMIYA, Tomoyuki FUJIKAWA, Koji MAZAKI, Shimpei TAKITA, Masaki KANESAKI, Masaya TAKAHASHI, Kazuhiro UDA, Yusei NAKAYASHIKI, Mitsuru SHIBANUMA, Kazuyoshi OBAYASHI
  • Publication number: 20210143684
    Abstract: A contactless power feeding apparatus includes a plurality of primary coils mounted on a road and a power feed controller which uses a portion of the primary coils as a power transmitting coil to achieve delivery of electrical power from the power transmitting coil to a secondary coil mounted in a vehicle. The power feed controller uses a selected primary coil that is one of the primary coils other than the power transmitting coil to decrease a leakage of magnetic flux arising from excitation of the power transmitting coil. Instead of the selected primary coil, the secondary coil may be used to reduce the leakage of magnetic flux.
    Type: Application
    Filed: January 15, 2021
    Publication date: May 13, 2021
    Applicant: DENSO CORPORATION
    Inventors: Hayato SUMIYA, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI, Kazuyoshi OBAYASHI, Shimpei TAKITA, Koji MAZAKI, Mitsuru SHIBANUMA, Masaki KANESAKI, Takuya KIGUCHI, Kazuhiro UDA
  • Publication number: 20210114465
    Abstract: A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.
    Type: Application
    Filed: December 28, 2020
    Publication date: April 22, 2021
    Applicant: DENSO CORPORATION
    Inventors: Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI, Koji MAZAKI, Shimpei TAKITA, Hayato SUMIYA, Masaki KANESAKI, Takuya KIGUCHI, Kazuhiro UDA, Mitsuru SHIBANUMA, Kazuyoshi OBAYASHI, Tomoyuki FUJIKAWA, Masaya TAKAHASHI, Yusei NAKAYASHIKI
  • Patent number: 10862336
    Abstract: A non-contact power supply device includes: a power transmission coil that generates a magnetic flux by an alternating current; a power transmission circuit that supplies the alternating current to the power transmission coil; a power transmission side control circuit that controls the power transmission circuit; a power receiving coil that generates an alternating current by interlinking the magnetic flux generated in the power transmission coil; and a power receiving circuit that converts the alternating current supplied from the power receiving coil into a direct current, and supplies the direct current to the power supply target. The power transmission side control circuit obtains a voltage vector target value based on a relationship between a voltage vector and a current vector, and controls the power transmission circuit to set the voltage vector of the alternating current output from the power transmission circuit to be the voltage vector target value.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: December 8, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kazuyoshi Obayashi, Akira Kamiya, Eisuke Takahashi
  • Patent number: 10807547
    Abstract: A power supply apparatus configures an on-board power supply system that includes a first battery and a second battery. A first module and a first detecting unit are electrically connected to the first battery as a first electrical load. A second module and a second detecting unit are electrically connected to the second battery as a second electrical load. The first module and the second module configure an electric power steering apparatus. A starter is electrically connected to the first battery. The first battery and the second battery are electrically connected by a connection path. A resistor unit is provided on the connection path.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: October 20, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kazuyoshi Obayashi, Eisuke Takahashi
  • Publication number: 20200216002
    Abstract: A power supply system having a plurality of power systems is provided with a power output section in each of the power systems, an electrical load in each of the power systems, operating from power supplied by the power output section, main paths that connect the power output sections of adjacent ones of the power systems, an inter-system switch that establishes a conducting condition between the adjacent power systems by being turned on and establishes a disconnected condition between the adjacent power systems by being turned off, and an intra-system switch in each of the power systems, which is disposed on the main path between the power output section and the inter-system switch, and which establishes a conducting condition between the power output section and the electrical load by being turned on and establishes a disconnected condition between the power output section and the electrical load by being turned off.
    Type: Application
    Filed: March 20, 2020
    Publication date: July 9, 2020
    Applicant: DENSO CORPORATION
    Inventors: Koji MAZAKI, Kazuyoshi OBAYASHI, Tadatoshi ASADA
  • Patent number: 10279691
    Abstract: A contactless feeding pad includes a power-receiving side pad, a power-transmitting side pad, and an auxiliary pad. The power-transmitting side pad is different from the power-receiving side pad in size or shape and transmits electric power contactlessly to the power-receiving side pad while being situated oppositely to the power-receiving side pad. The auxiliary pad is installed between the power-transmitting side pad and the power-receiving side pad in close proximity to the power-transmitting side pad or the power-receiving side pad and forms a resonance circuit.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: May 7, 2019
    Assignee: DENSO CORPORATION
    Inventors: Kazuyoshi Obayashi, Kouji Mazaki, Eisuke Takahashi, Keisuke Tani
  • Patent number: 10230269
    Abstract: A contactless power supply system includes: a power supply pad including a power supply core formed of a magnetic material, and a power supply coil that uses the power supply core as a magnetic path; and a filter circuit including an inductor coil, the filter circuit being connected to the power supply pad. The power supply pads to which the respective filter circuits are connected are brought into a face-to-face relation so that electric power is transmitted from one power supply pad to the other power supply pad in a contactless manner. An inductor coil of at least either one of the filter circuits is provided to the power supply core of the power supply pad to which the filter circuit is connected, and the inductor coil uses the power supply core as a magnetic path.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: March 12, 2019
    Assignee: DENSO CORPORATION
    Inventors: Eisuke Takahashi, Kazuyoshi Obayashi, Kouji Mazaki, Takuro Tsutsui
  • Patent number: 10059284
    Abstract: A vehicle-mounted device control system includes a first vehicle-mounted device, a second vehicle-mounted device, and a control unit connected to the first vehicle-mounted device and the second vehicle-mounted device. The control unit includes signal transmission means that transmits a predetermined signal to the first vehicle-mounted device, cooperative control means that performs cooperative control in which the second vehicle-mounted device is controlled using information used by the first vehicle-mounted device when the first vehicle-mounted device responds to the predetermined signal, and alternative control means that performs alternative control in which the second vehicle-mounted device is controlled without using information, used by the first vehicle-mounted device, when the first vehicle-mounted device does not respond to the predetermined signal.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: August 28, 2018
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Eiichi Ishii, Kazuyoshi Obayashi, Masatoshi Takahara, Takashi Hayashi
  • Patent number: 9876365
    Abstract: A contactless power supply system for transferring power without contact between a primary side coil and a secondary side coil is provided. In the contactless power supply system, a manipulation unit manipulates a secondary side converter so that power outputted to a load is controlled to be a command value. The manipulation unit manipulates an input voltage of a primary side resonance circuit so that a current flowing in the primary side resonance circuit equals a product of a current flowing in the secondary side resonance circuit and a current coefficient. The current coefficient is defined as a square root of a specific value and the specific value is an equivalent resistance of the secondary side resonance circuit divided by an equivalent resistance of the primary side resonance circuit.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: January 23, 2018
    Assignee: DENSO CORPORATION
    Inventors: Kouji Mazaki, Nobuhisa Yamaguchi, Keisuke Tani, Eisuke Takahashi, Kazuyoshi Obayashi
  • Patent number: 9859709
    Abstract: A power control apparatus is applied to a vehicle provided with a receiving port connected with an external power supply device placed outside the vehicle and on-vehicle electrical loads including a second battery which stores power supplied from the external power supply device via the receiving port. The power control apparatus for vehicles has power supply processing means that performs a power supply process for supplying desired power to the loads during a stop of the vehicle. This power supply processing means predicts cost required to supply the desired power, based on future predicted power cost information, in planning a power supply process needed during the stop of the vehicle. This planned power supply process is performed.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: January 2, 2018
    Assignee: DENSO CORPORATION
    Inventors: Akira Sakamoto, Kazuyoshi Obayashi
  • Patent number: 9841524
    Abstract: A metal object detection device includes a plurality of detection coils, a capacitor configuring a resonant circuit in cooperation with each of at least two of the detection coils, a first series connection body, a second series connection body, a voltage applying unit, and a processing unit. The voltage applying unit applies an AC voltage to both ends of each of the first series connection body and the second series connection body. The processing unit performs a process for detecting the metal object on the basis of a potential difference between a connection point included in the first series connection body and a connection point included in the second series connection body.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: December 12, 2017
    Assignee: DENSO CORPORATION
    Inventors: Kazuyoshi Obayashi, Akira Kamiya, Eisuke Takahashi, Keisuke Tani
  • Publication number: 20170305282
    Abstract: A non-contact power supply device includes: a power transmission coil that generates a magnetic flux by an alternating current; a power transmission circuit that supplies the alternating current to the power transmission coil; a power transmission side control circuit that controls the power transmission circuit; a power receiving coil that generates an alternating current by interlinking the magnetic flux generated in the power transmission coil; and a power receiving circuit that converts the alternating current supplied from the power receiving coil into a direct current, and supplies the direct current to the power supply target. The power transmission side control circuit obtains a voltage vector target value based on a relationship between a voltage vector and a current vector, and controls the power transmission circuit to set the voltage vector of the alternating current output from the power transmission circuit to be the voltage vector target value.
    Type: Application
    Filed: January 27, 2016
    Publication date: October 26, 2017
    Applicant: DENSO CORPORATION
    Inventors: Kazuyoshi OBAYASHI, Akira KAMIYA, Eisuke TAKAHASHI
  • Patent number: 9748773
    Abstract: A contactless power supply device includes a power-transmitting-side pad and a power-receiving-side pad. Each of the power-transmitting-side pad and the power-receiving-side pad has a core and a coil. The core has a plate-shaped yoke portion. The coil has a first coil portion and a second coil portion. The first coil portion is arranged on a top surface of the yoke portion. The second coil portion is arranged along an outer periphery of the yoke portion.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: August 29, 2017
    Assignee: DENSO CORPORATION
    Inventors: Kouji Mazaki, Eisuke Takahashi, Kazuyoshi Obayashi
  • Patent number: RE47625
    Abstract: An EV priority switch is configured to allow a user to request a change between an EV priority mode and an HV mode. If an SOC of a power storage device is less than a first threshold value when the change to the HV mode is requested from the EV priority switch during the EV priority mode, an ECU changes the running mode to attain the HV mode and controls the SOC to be close to the SOC at the moment of a request for the change to the HV mode. If the SOC is greater than or equal to the first threshold value, the ECU maintains the EV priority mode. If the SOC reaches a second threshold value less than the first threshold value, the ECU forcefully changes the running mode to attain the HV mode.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: October 1, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masayuki Komatsu, Kazuyoshi Obayashi, Hiroki Sawada