Patents by Inventor Kouji Mazaki

Kouji Mazaki 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: 20220203848
    Abstract: A vehicle power supply system is configured to supply power to a vehicle from a power supply apparatus laid on a power supply lane of a vehicle travel path, the power supply apparatus includes a plurality of power supply segments laid in a preset interval along the power supply lane, and a controller configured to control the plurality of power supply segments. The controller is configured to estimate timing of the vehicle reaching a next power supply segment that supplies power next after a present power supply segment that is supplying power, from at least a vehicle velocity derived from a change in position of the vehicle, and cause the next power supply segment to start power supply at the timing estimated.
    Type: Application
    Filed: March 18, 2022
    Publication date: June 30, 2022
    Applicant: DENSO CORPORATION
    Inventors: Kouji MAZAKI, Nobuhisa YAMAGUCHI, Mitsuru SHIBANUMA
  • Publication number: 20220072965
    Abstract: In a moving-object power supply system, a control unit selects, as a power transmission segment, one of segments included in at least one power transmission section. The control unit supplies, through a power supply circuit, power to the power transmission segment to thereby generate a magnetic field through a power transmission coil of the power transmission segment. The control unit determines, based on an ascertained first electrical characteristic of the power transmission segment and an ascertained second electrical characteristic of at least one power non-transmission segment, whether there is a malfunction in each of the power transmission segment and the at least one power non-transmission segment.
    Type: Application
    Filed: November 17, 2021
    Publication date: March 10, 2022
    Applicant: DENSO CORPORATION
    Inventors: Kouji MAZAKI, Nobuhisa YAMAGUCHI, Eisuke TAKAHASHI, Mitsuru SHIBANUMA, Shinpei TAKITA, Masaya TAKAHASHI, Hayato SUMIYA, Masaki KANESAKI, Takuya KIGUCHI, Kazuhiro UDA, Yuusei NAKAYASHIKI
  • 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: 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: 9793719
    Abstract: A non-contact power supply apparatus includes a transmission-side pad, a transmission-side resonant circuit, a reception-side pad, a reception-side resonant circuit, a power transmission circuit, a power reception circuit, and a control circuit. The control circuit controls an alternating-current voltage supplied to the transmission-side pad and an alternating-current voltage supplied to the power reception circuit, so that a power factor of the alternating current supplied from the power transmission circuit to the transmission-side pad connected to the transmission-side resonant circuit and direct-current power supplied from the power supply circuit to an on-board battery are respectively set to target values. As a result, change in power factor can be suppressed even when the coupling coefficient of the transmission-side pad and the reception-side pad changes, and predetermined electric power can be transmitted.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: October 17, 2017
    Assignee: DENSO CORPORATION
    Inventors: Nobuhisa Yamaguchi, Akira Sakamoto, Kouji Mazaki, Kouki Nagura
  • 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
  • Publication number: 20170126059
    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: Application
    Filed: March 2, 2015
    Publication date: May 4, 2017
    Inventors: Eisuke TAKAHASHI, Kazuyoshi OBAYASHI, Kouji MAZAKI, Takuro TSUTSUI
  • Publication number: 20150380948
    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: Application
    Filed: February 4, 2014
    Publication date: December 31, 2015
    Inventors: Kouji MAZAKI, Nobuhisa YAMAGUCHI, Keisuke TANI, Eisuke TAKAHASHI, Kazuyoshi OBAYASHI
  • Publication number: 20150326031
    Abstract: A non-contact power supply apparatus includes a transmission-side pad, a transmission-side resonant circuit, a reception-side pad, a reception-side resonant circuit, a power transmission circuit, a power reception circuit, and a control circuit. The control circuit controls an alternating-current voltage supplied to the transmission-side pad and an alternating-current voltage supplied to the power reception circuit, so that a power factor of the alternating current supplied from the power transmission circuit to the transmission-side pad connected to the transmission-side resonant circuit and direct-current power supplied from the power supply circuit to an on-board battery are respectively set to target values. As a result, change in power factor can be suppressed even when the coupling coefficient of the transmission-side pad and the reception-side pad changes, and predetermined electric power can be transmitted.
    Type: Application
    Filed: November 29, 2013
    Publication date: November 12, 2015
    Inventors: Nobuhisa YAMAGUCHI, Akira SAKAMOTO, Kouji MAZAKI, Kouki NAGURA
  • Publication number: 20150076918
    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: Application
    Filed: March 20, 2013
    Publication date: March 19, 2015
    Inventors: Kouji Mazaki, Eisuke Takahashi, Kazuyoshi Obayashi
  • Publication number: 20150061585
    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: Application
    Filed: April 4, 2013
    Publication date: March 5, 2015
    Inventors: Kazuyoshi Obayashi, Kouji Mazaki, Eisuke Takahashi, Keisuke Tani