Patents by Inventor Eisuke Takahashi

Eisuke Takahashi 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: 20190303767
    Abstract: A prediction method includes: acquiring time-series data of sets of a control input um and a control output ym as a sample of a control input u and a control output y; calculating, based on the time-series data, a value ?* that minimizes a value of an evaluation function J(?,?,um,ym) in a state where a parameter ? is set to a fixed value ?0, calculating a value ?* that minimizes the evaluation function J(?,?,um,ym) in a state where a parameter ? is set to the value ?*; and calculating a prediction value up of the control input u and a prediction value yp of the control output y corresponding to a desired value r, based on a transfer function C(?*) in which the parameter ? is set to the value ?* and on a target response transfer function Td(?*) in which the parameter ? is set to the value ?*.
    Type: Application
    Filed: February 25, 2019
    Publication date: October 3, 2019
    Inventor: Eisuke Takahashi
  • 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
  • Publication number: 20190129385
    Abstract: A method includes: acquiring time-series data of a control input and a control output; calculating a variable parameter that minimizes an evaluation function, based on observation values of the control input and the control output; and updating the variable parameter with the calculated variable parameter. The evaluation function includes: a first function part that evaluates an entire error that is a control error of the entire observation period and increases the output value as the entire error increases; and at least one of: a second function part that evaluates a sectional error that is a control error of a particular section in the observation period and increases the output value as the sectional error increases; and a third function part that evaluates an instantaneous error that is a control error of a particular time point in the observation period and increases the output value as the instantaneous error increases.
    Type: Application
    Filed: October 23, 2018
    Publication date: May 2, 2019
    Inventor: Eisuke TAKAHASHI
  • 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: 10090752
    Abstract: A power conversion device has a main switch connected to a positive electrode side line of a battery, at least one semiconductor power element connected between the main switch and a negative electrode voltage line, and an auxiliary circuit having an auxiliary switch, a resonance reactor and an auxiliary diode connected parallel to the main switch. The device further has a voltage detection part which detects an external side voltage of the main switch and a control circuit part performing a switching control of the main switch and the auxiliary switch based on the detection result of the voltage detection part. During the turned-off state of the main switch, the control circuit part turns off the auxiliary switch before the external side voltage of the main switch reaches an input voltage of the main switch. This external side voltage starts to increase when the auxiliary switch is turned on.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: October 2, 2018
    Assignee: DENSO CORPORATION
    Inventors: Masaya Takahashi, Eisuke Takahashi, Takuya Kiguchi
  • Publication number: 20180212510
    Abstract: A power conversion device has a main switch connected to a positive electrode side line of a battery, at least one semiconductor power element connected between the main switch and a negative electrode voltage line, and an auxiliary circuit having an auxiliary switch, a resonance reactor and an auxiliary diode connected parallel to the main switch. The device further has a voltage detection part which detects an external side voltage of the main switch and a control circuit part performing a switching control of the main switch and the auxiliary switch based on the detection result of the voltage detection part. During the turned-off state of the main switch, the control circuit part turns off the auxiliary switch before the external side voltage of the main switch reaches an input voltage of the main switch. This external side voltage starts to increase when the auxiliary switch is turned on.
    Type: Application
    Filed: December 27, 2017
    Publication date: July 26, 2018
    Applicant: DENSO CORPORATION
    Inventors: Masaya TAKAHASHI, Eisuke TAKAHASHI, Takuya KIGUCHI
  • Patent number: 9960678
    Abstract: In a power converter, a first electrical path connects between the series resonant circuit and a selected terminal from the high- and low-side input and output terminals of the power converter. An auxiliary diode is provided on one of the series resonant circuit and the first electrical path. An auxiliary switch, when turned on, causes an inductor current to flow through the auxiliary diode to the resonance inductor, thus storing electromagnetic energy into the resonance inductor, and causes the resonance inductor and the capacitance component of the series resonant circuit to resonate with each other. A second electrical path bypasses the auxiliary switch for flow of the inductor current. A discharge unit is provided on the second electrical path. The discharge unit is activated to discharge the electromagnetic energy stored in the resonance inductor via the second electrical path.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: May 1, 2018
    Assignees: DENSO CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Eisuke Takahashi, Masaya Takahashi, Kimihiro Nishijima
  • 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
  • Publication number: 20170373592
    Abstract: In a power converter, a first electrical path connects between the series resonant circuit and a selected terminal from the high- and low-side input and output terminals of the power converter. An auxiliary diode is provided on one of the series resonant circuit and the first electrical path. An auxiliary switch, when turned on, causes an inductor current to flow through the auxiliary diode to the resonance inductor, thus storing electromagnetic energy into the resonance inductor, and causes the resonance inductor and the capacitance component of the series resonant circuit to resonate with each other. A second electrical path bypasses the auxiliary switch for flow of the inductor current. A discharge unit is provided on the second electrical path. The discharge unit is activated to discharge the electromagnetic energy stored in the resonance inductor via the second electrical path.
    Type: Application
    Filed: June 21, 2017
    Publication date: December 28, 2017
    Applicants: DENSO CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Eisuke TAKAHASHI, Masaya TAKAHASHI, Kimihiro NISHIJIMA
  • 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
  • Patent number: 9821974
    Abstract: A conveying mechanism has a pair of nipping members configured to nip a sheet from both sides thereof at a nipping position and to convey the sheet from upstream to downstream side. The pair of nipping members includes a conveying roller. A controller performs: a motor controlling process of controlling the motor to perform a conveying operation of the sheet by rotation of the conveying roller; a reaction-force calculating process of calculating a reaction-force inference value which corresponds to reaction force that acts on the motor, by removing a friction component generated due to rotation of the motor from a disturbance inference value, the disturbance inference value being calculated from both a control input to the motor and a control output relative to the control input; and a warning process of outputting warning in response to occurrence of multiple feeding of the sheet, based on the reaction-force inference value.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: November 21, 2017
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Eisuke Takahashi
  • 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
  • Publication number: 20170225635
    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: Application
    Filed: February 10, 2017
    Publication date: August 10, 2017
    Applicant: DENSO CORPORATION
    Inventors: Kazuyoshi OBAYASHI, Eisuke TAKAHASHI
  • 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: 20170090444
    Abstract: There is provided a method of updating a setting value of a variable parameter, the method including: obtaining a time-series data of control input and a time-series data of control output observed in control with a controller; calculating a value of the variable parameter which minimizes an output value of an evaluation function based on the obtained time-series data of the control input and the control output; and updating the setting value of the variable parameter to the calculated value of the variable parameter. The evaluation function includes a first function part in which a first norm or a second norm changes depending on the value of the variable parameter, and a second function part of which specific frequency band has an amount, by which the output value of the evaluation function is increased, larger than that of any other frequency band.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 30, 2017
    Inventor: Eisuke Takahashi
  • Patent number: 9340046
    Abstract: A drive device includes: connection gears connected to driving objects; a movable gear movable between the connection gears; a drive source for rotating the movable gear; and at least one estimator each provided for a corresponding one of at least one of the connection gears and configured to: estimate a reaction-force estimate value, as an estimate value of a reaction force acting in a power transmission system from the drive source to the driving object, based on control input, control output, and a model of the power transmission system; and output the reaction-force estimate value. The model is configured such that the reaction-force estimate value falls within a set range in a state in which the movable gear is meshed with the connection gear. A controller detects mesh and/or separation between the movable gear and the at least one connection gear based on the reaction-force estimate value.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: May 17, 2016
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Eisuke Takahashi
  • Publication number: 20160089911
    Abstract: A drive device includes: connection gears connected to driving objects; a movable gear movable between the connection gears; a drive source for rotating the movable gear; and at least one estimator each provided for a corresponding one of at least one of the connection gears and configured to: estimate a reaction-force estimate value, as an estimate value of a reaction force acting in a power transmission system from the drive source to the driving object, based on control input, control output, and a model of the power transmission system; and output the reaction-force estimate value. The model is configured such that the reaction-force estimate value falls within a set range in a state in which the movable gear is meshed with the connection gear. A controller detects mesh and/or separation between the movable gear and the at least one connection gear based on the reaction-force estimate value.
    Type: Application
    Filed: September 28, 2015
    Publication date: March 31, 2016
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Eisuke TAKAHASHI
  • 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: 20150362614
    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: Application
    Filed: December 12, 2013
    Publication date: December 17, 2015
    Inventors: Kazuyoshi OBAYASHI, Akira KAMIYA, Eisuke TAKAHASHI, Keisuke TANI