Patents by Inventor Kunihiko Matsuda

Kunihiko Matsuda 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: 20240313523
    Abstract: A monitoring voltage output unit outputs a monitoring voltage that has a positive correlation with the current flowing through a shunt resistor connected in series with an upper arm element and a lower arm element of each phase. A monitoring circuit monitors an inverter overcurrent abnormality due to an upper arm element or a lower arm element of one or more phases being stuck in an ON state based on the monitoring voltage. A comparator of the monitoring circuit outputs an overcurrent flag of a pulse signal when the monitoring voltage is larger than a reference value. A determination unit determines that an inverter overcurrent is abnormal and stop energization of an inverter, when a cumulative output time of the overcurrent flag of at least one phase reaches a time threshold or when number of outputs of the overcurrent flag reaches a number threshold.
    Type: Application
    Filed: May 21, 2024
    Publication date: September 19, 2024
    Inventor: KUNIHIKO MATSUDA
  • Patent number: 12062979
    Abstract: A drive device for driving a load includes: an inverter unit having an upper arm element and a lower arm element and converting electric power supplied to the load; and a charge pump circuit that supplies a gate voltage to the upper arm element. An output voltage of the charge pump circuit is variable according to an inverter input voltage input from an inverter input wiring to a high potential side of the inverter unit.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: August 13, 2024
    Assignee: DENSO CORPORATION
    Inventor: Kunihiko Matsuda
  • Publication number: 20240266849
    Abstract: A reverse connection protection relay of a power supply device is provided in a power supply line between a battery and an input capacitor and is parallel connected with a diode that allows current flow from a battery side to a power converter side, and interrupts the current flow from the power converter side to the battery side when the protection relay is turned off. At a time of initial check, a booster circuit performs an overboost process in which a target voltage is temporarily raised above a value during normal operation. A precharge circuit applies a boosted voltage to an electrode on a high potential side of the input capacitor. A monitoring circuit detects an abnormal due to being stuck in an ON state or in an OFF state of the protection relay according to a post-relay voltage that is a voltage on the inverter side of the protection relay.
    Type: Application
    Filed: March 28, 2024
    Publication date: August 8, 2024
    Inventor: KUNIHIKO MATSUDA
  • Publication number: 20240195324
    Abstract: A power supply apparatus includes a power converter, pull-up and pull-down resistors, a reverse-connection protective relay, a controller, and a dark current cut switch. The power converter includes upper-arm and lower-arm switching elements being connected in series between a power supply line and a ground line, and converts a DC power of a battery and supplies the converted DC power to a load. The pull-up resistor is connected between the power supply line and a common connection node between the upper-arm and lower-arm switching elements, and the pull-down resistor is connected between the common connection node and a ground. The reverse-connection protective relay cuts off a current from the power converter to the battery. The controller controls the power converter and the reverse-connection protective relay. The dark current cut switch cuts off a dark current flowing to the ground through the pull-up resistor and the pull-down resistor.
    Type: Application
    Filed: February 22, 2024
    Publication date: June 13, 2024
    Inventor: KUNIHIKO MATSUDA
  • Patent number: 11952972
    Abstract: A booster is mounted on a vehicle having an idle stop function. The booster boosts an input voltage supplied from a battery, and outputs the boosted input voltage to an in-vehicle device. The booster includes a booster circuit and an output voltage sensor. The booster circuit is a chopper-type, and includes a reactor having one end connected to the battery and a switching element connected between an other end of the reactor and a ground. The output voltage sensor detects an output voltage of the booster circuit.
    Type: Grant
    Filed: July 20, 2022
    Date of Patent: April 9, 2024
    Assignee: DENSO CORPORATION
    Inventor: Kunihiko Matsuda
  • Publication number: 20240088758
    Abstract: A drive device includes a motor with two sets of motor windings and a control unit. The control unit has a board on which an electronic component related to energization control of the motor windings are mounted, a connector unit, and a cover member that covers control components including the board, and is provided on one side in a axial direction of the motor. The connector unit has two main connectors and at least one sub connector used for connection with an outside, and these openings are provided so as to face a side opposite to the motor. The main connectors are connected with a power supply and a communication network. The sub connector has an opening separate from that of the main connector and is connected to a separate member.
    Type: Application
    Filed: November 16, 2023
    Publication date: March 14, 2024
    Inventors: Tomoaki YOSHIMI, Yasufumi MATSUO, Kunihiko MATSUDA
  • Publication number: 20230097198
    Abstract: A drive device for driving a load includes: an inverter unit having an upper arm element and a lower arm element and converting electric power supplied to the load; and a charge pump circuit that supplies a gate voltage to the upper arm element. An output voltage of the charge pump circuit is variable according to an inverter input voltage input from an inverter input wiring to a high potential side of the inverter unit.
    Type: Application
    Filed: November 29, 2022
    Publication date: March 30, 2023
    Inventor: Kunihiko MATSUDA
  • Publication number: 20230079227
    Abstract: A first circuit energizes a steering assist actuator to electrically assist steering of a driver. A second circuit is provided in a same housing as the first circuit and energizes a positional actuator to move a steering position. A controller operates the first and second circuits to control operations of the steering assist actuator and the positional actuator. The controller changes a priority between the first circuit and the second circuit in a start period, in which the steering control device is started, a normal operation period, in which the steering control device is operated normally, and a stop period, in which the steering control device is stopped. The priority includes at least one of an order of operating the first circuit and the second circuit, output allocation between the first circuit and the second circuit, and output magnitude between the first circuit and the second circuit.
    Type: Application
    Filed: November 8, 2022
    Publication date: March 16, 2023
    Inventors: TAKASHI SUZUKI, HIDEKI KABUNE, TOSHIHIRO FUJITA, KUNIHIKO MATSUDA, HARUKI AMANO
  • Publication number: 20220356861
    Abstract: A booster is mounted on a vehicle having an idle stop function. The booster boosts an input voltage supplied from a battery, and outputs the boosted input voltage to an in-vehicle device. The booster includes a booster circuit and an output voltage sensor. The booster circuit is a chopper-type, and includes a reactor having one end connected to the battery and a switching element connected between an other end of the reactor and a ground. The output voltage sensor detects an output voltage of the booster circuit.
    Type: Application
    Filed: July 20, 2022
    Publication date: November 10, 2022
    Inventor: Kunihiko MATSUDA
  • Patent number: 11471770
    Abstract: A game server 30 includes: a processing unit 38 that deletes an item obtained by a user and increases the value of a parameter on the basis of an experience value of the deleted item when a condition preset by the user is satisfied; an item box 35 that stores the item obtained by the user when the condition is not satisfied; and a present box 36 that stores the item obtained by the user when the condition is not satisfied and the number of items stored in the item box 35 has reached an upper-limit value.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: October 18, 2022
    Assignee: CYGAMES, INC.
    Inventors: Kodai Wada, Kunihiko Matsuda, Satoshi Hiroshima
  • Patent number: 11345397
    Abstract: Switching elements are mounted on a substrate and switch energization of motor windings. A lead wire set connects phase coils of the motor windings to the substrate. The switching elements, the lead wire set, a power terminal which is a power supply terminal and a ground terminal, and a control circuit unit are provided for each system. The switching elements, the lead wire set and the power terminal are collectively arranged in a power region for each system, and the lead wire sets are arranged in rotational symmetry.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 31, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kunihiko Matsuda, Katsuhiko Hayashi, Takaharu Kozawa
  • Patent number: 11219836
    Abstract: An information processing program causes a computer to execute control processing in which: when a battle by a first character group including a first character and a second character group including various second characters is started, control is executed so as to display display target parameters for the second characters on a display medium, and a first number, which is the number of the second characters, is stored; a second number, which is the number of second characters determined as participating in the battle on the basis of determination parameters, which are parameters for determining whether or not to permit participation in the battle, is stored in iterative processing that is iterated during the battle; the display mode of the display target parameters on the display medium is changed in accordance with a condition regarding at least one of the first number and the second number in the iterative processing.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: January 11, 2022
    Assignee: CYGAMES, INC.
    Inventors: Satoshi Nakajima, Tetsuya Fukuhara, Kunihiko Matsuda
  • Publication number: 20210138346
    Abstract: A game server 30 includes: a processing unit 38 that deletes an item obtained by a user and increases the value of a parameter on the basis of an experience value of the deleted item when a condition preset by the user is satisfied; an item box 35 that stores the item obtained by the user when the condition is not satisfied; and a present box 36 that stores the item obtained by the user when the condition is not satisfied and the number of items stored in the item box 35 has reached an upper-limit value.
    Type: Application
    Filed: January 22, 2021
    Publication date: May 13, 2021
    Applicant: CYGAMES, INC.
    Inventors: Kodai Wada, Kunihiko Matsuda, Satoshi Hiroshima
  • Publication number: 20200246708
    Abstract: An information processing program causes a computer to execute control processing in which: when a battle by a first character group including a first character and a second character group including various second characters is started, control is executed so as to display display target parameters for the second characters on a display medium, and a first number, which is the number of the second characters, is stored; a second number, which is the number of second characters determined as participating in the battle on the basis of determination parameters, which are parameters for determining whether or not to permit participation in the battle, is stored in iterative processing that is iterated during the battle; the display mode of the display target parameters on the display medium is changed in accordance with a condition regarding at least one of the first number and the second number in the iterative processing.
    Type: Application
    Filed: April 24, 2020
    Publication date: August 6, 2020
    Applicant: CYGAMES, INC.
    Inventors: Satoshi Nakajima, Tetsuya Fukuhara, Kunihiko Matsuda
  • Publication number: 20200140004
    Abstract: Switching elements are mounted on a substrate and switch energization of motor windings. A lead wire set connects phase coils of the motor windings to the substrate. The switching elements, the lead wire set, a power terminal which is a power supply terminal and a ground terminal, and a control circuit unit are provided for each system. The switching elements, the lead wire set and the power terminal are collectively arranged in a power region for each system, and the lead wire sets are arranged in rotational symmetry.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 7, 2020
    Inventors: Kunihiko MATSUDA, Katsuhiko HAYASHI, Takaharu KOZAWA
  • Patent number: 8333259
    Abstract: A magnetic sensor disposed in an axial direction of a shaft of a motor detects the rotation angle of the rotor by detecting magnetism of the magnet that is disposed on one end of the shaft. A first and second conducting wires extend in parallel with an axis of the shaft, and are equidistantly positioned relative to the axis, on a virtual circle that has a center point on the axis of the shaft. The electric current flowing in the first conducting wire and the electric current flowing in the second conducting wire have the same magnitude and the same flow direction with each other at any time. When the first conducting wire and the second conducting wire are on opposite sides relative to the center point of the virtual circle, the magnetic fields around the conducting wires cancel with each other, thereby enabling accurate detection of the rotation angle.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: December 18, 2012
    Assignee: Denso Corporation
    Inventor: Kunihiko Matsuda
  • Publication number: 20120031697
    Abstract: A magnetic sensor disposed in an axial direction of a shaft of a motor detects the rotation angle of the rotor by detecting magnetism of the magnet that is disposed on one end of the shaft. A first and second conducting wires extend in parallel with an axis of the shaft, and are equidistantly positioned relative to the axis, on a virtual circle that has a center point on the axis of the shaft. The electric current flowing in the first conducting wire and the electric current flowing in the second conducting wire have the same magnitude and the same flow direction with each other at any time. When the first conducting wire and the second conducting wire are on opposite sides relative to the center point of the virtual circle, the magnetic fields around the conducting wires cancel with each other, thereby enabling accurate detection of the rotation angle.
    Type: Application
    Filed: August 4, 2011
    Publication date: February 9, 2012
    Applicant: DENSO CORPORATION
    Inventor: Kunihiko Matsuda