Patents by Inventor Kenji Ogawa

Kenji Ogawa 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: 20210120637
    Abstract: An induction heating device is provided. The induction heating device comprises a plurality of induction heating devices disposed at intervals along the circumference of a ring-shaped workpiece, a setting unit for setting induction heating conditions, and a switching control unit. Each of the plurality of induction heating devices comprises heating coils disposed facing areas to be heated of the workpiece, a plurality of transformers connected to the heating coils in parallel, a plurality of matching units connected to any one of the plurality of transformers, an inverter unit having a rectifier unit and an inverter unit, an inverter control unit having a rectification control unit, and a group of switches.
    Type: Application
    Filed: December 28, 2020
    Publication date: April 22, 2021
    Applicant: NETUREN CO., LTD.
    Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
  • Patent number: 10913485
    Abstract: Based on the result of determination by a friction transition state determination unit, an assist command value correction unit corrects a basic assist command value in such a way that the hysteresis width of steering torque at a time of turning steering increases; then, a current driving unit controls a motor current in such a way that the motor current coincides with a current command value obtained by correcting the basic assist command value by use of an assist command correction value.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: February 9, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taizo Toda, Masaya Endo, Kenji Ogawa
  • Publication number: 20190183855
    Abstract: An evaluation system for replication activity of HBV capable of visualizing and quantifying replication of HBV DNA in a short period of time inexpensively, safely, and rapidly and a method for evaluation using the system are developed and provided. Moreover, a novel composition for inhibiting HBV replication with a mode of action different from that of conventional anti-HBV drugs is developed and provided. A therapeutic agent for hepatitis B comprising as an active ingredient an HBV-Pol activity inhibitor consisting of a phosphorylation inhibitor that inhibits phosphorylation of a TxY motif present in Terminal protein region of HBV-Pol is provided.
    Type: Application
    Filed: August 10, 2017
    Publication date: June 20, 2019
    Applicant: RIKEN
    Inventor: Kenji OGAWA
  • Publication number: 20190039641
    Abstract: Based on the result of determination by a friction transition state determination unit, an assist command value correction unit corrects a basic assist command value in such a way that the hysteresis width of steering torque at a time of turning steering increases; then, a current driving unit controls a motor current in such a way that the motor current coincides with a current command value obtained by correcting the basic assist command value by use of an assist command correction value.
    Type: Application
    Filed: April 26, 2016
    Publication date: February 7, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taizo TODA, Masaya ENDO, Kenji OGAWA
  • Patent number: 10196085
    Abstract: In an electric power steering device assisted by a brushless motor, an induced voltage from a brushless motor is detected when a main power supply is off. The motor is determined to be in a high rpm state when the induced voltage is in a first transient state from a voltage?a high rpm detection threshold Th1 to a voltage?Th1, thereby setting an intermittent excitation cycle of a revolution angle sensor connected to the motor to a short cycle. The motor is determined to be in a low rpm state when the induced voltage becomes a voltage?a high rpm detection threshold Th2 after a wait period corresponding to an electrical angle between peaks or valleys of an output voltage has elapsed in a second transient state from a voltage?Th1 to a voltage?Th2, thereby setting the cycle to a long cycle.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: February 5, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hajime Iida, Hiroshi Gokan, Kenji Ogawa
  • Patent number: 10000235
    Abstract: The steering control device includes: current command value 1 calculation unit 11 which determines current command value 1 based on a vehicle speed and a steering torque; current command value 2 calculation unit 14 which determines current command value 2 based on a filtered differential value of the steering torque; and current drive unit 10 which drives motor 5 so that the value of the motor current matches the sum of current command values 1 and 2. When a first crossover frequency represents the crossover frequency of control open loop characteristics in the steering control device as obtained when current command value 2 is determined using a differential value of the steering torque which has not been filtered, the notch frequency of the notch filter is set to be greater than the mechanical resonance frequency of the steering control device and smaller than the first crossover frequency.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: June 19, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taizo Toda, Kenji Ogawa, Masaya Endo
  • Patent number: 9993896
    Abstract: A laser welding method for welding materials having different thicknesses includes abutting two plates having different thicknesses such that one surface of the thin plate and one surface the thick plate are made flush with each other; and thereafter welding the plates by applying a laser beam to abutting surfaces thereof, wherein the laser beam is directed obliquely relative to an abutting end face of the thick plate, a target position of the laser beam is determined on the abutting end face of the thick plate, and a target position depth D on the abutting end face of the thick plate is determined based on the formula t/3?D?t where t is a thickness of the abutting end face of the thin plate.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: June 12, 2018
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Kazuaki Hosomi, Kenji Ogawa, Takefumi Nakako, Keiji Yamamoto
  • Patent number: 9896124
    Abstract: A steering control apparatus is obtained which includes an assist instruction-value correction device for calculating, based on a result of a friction transition-state determination device, an assist correction value in order to obtain an assist instruction-value after its correction being made by correcting a basic assist instruction-value so that a hysteresis width of steering torque increases at the time of turn-back steering, and an electric current driving device for driving a motor so that an electric current of the motor is coincident with an electric current instruction-value therefor after its correction being made on the basis of the assist instruction-value after its correction being made; and the friction transition-state determination device determines the friction transition-state by integrating a differential value of steering-shaft reaction torque using an integrator having a limiting function to an upper or lower limit value defined in advance.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: February 20, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taizo Toda, Masaya Endo, Yoshihiko Kimpara, Kenji Ogawa
  • Patent number: 9896122
    Abstract: Provided is a steering control device, including: an actuator for applying a steering assist torque to a steering system of a vehicle; a vehicle turning state detection section for detecting a state amount representing a turning state of the vehicle; a steering-holding determination section for determining a steering-holding state of the steering system; a storing section for storing, when the steering-holding determination section determines that the steering system is in the steering-holding state, the state amount detected by the vehicle turning state detection section as a steering-holding determination state amount; a steering assist torque calculation section for calculating the steering assist torque based on an absolute value of the steering-holding determination state amount; and an actuator control section for controlling the actuator based on the calculated steering assist torque.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: February 20, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Endo, Yoshihiko Kimpara, Kenji Ogawa, Taizo Toda
  • Publication number: 20170369092
    Abstract: In an electric power steering device assisted by a brushless motor, an induced voltage from a brushless motor is detected when a main power supply is off. The motor is determined to be in a high rpm state when the induced voltage is in a first transient state from a voltage ?a high rpm detection threshold Th1 to a voltage?Th1, thereby setting an intermittent excitation cycle of a revolution angle sensor connected to the motor to a short cycle. The motor is determined to be in a low rpm state when the induced voltage becomes a voltage?a high rpm detection threshold Th2 after a wait period corresponding to an electrical angle between peaks or valleys of an output voltage has elapsed in a second transient state from a voltage–Th1 to a voltage?Th2, thereby setting the cycle to a long cycle.
    Type: Application
    Filed: February 26, 2015
    Publication date: December 28, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hajime IIDA, Hiroshi GOKAN, Kenji OGAWA
  • Publication number: 20170297145
    Abstract: Provided is a laser welding method of materials having different thicknesses that can achieve excellent weld strength regardless of the thickness of a thick plate, and a welded member having different thicknesses.
    Type: Application
    Filed: June 1, 2015
    Publication date: October 19, 2017
    Inventors: Kazuaki HOSOMI, Kenji OGAWA, Takefumi NAKAKO, Keiji YAMAMOTO
  • Patent number: 9738307
    Abstract: Provided are a steering control device and the like, including the steps of: calculating a steering assist torque to be applied to an actuator for applying the steering assist torque to a steering system of a vehicle in order to improve return characteristics of the steering system; determining a steering state of a driver; correcting the steering assist torque depending on a result of the steering state determination; and controlling the actuator depending on the corrected steering assist torque, in which the step of determining a steering state of a driver includes determining the steering state of the driver based on a combination of at least two of the following: a manually-operating steering state determination; an abrupt steering wheel return determination; a high-acceleration steering wheel return determination; a manual return steering determination; and an additional-steering determination.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: August 22, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Endo, Hidetoshi Ikeda, Isao Kezobo, Kenji Ogawa, Taizo Toda
  • Patent number: 9730278
    Abstract: In order to provide an induction heating cooking device in which a supporting configuration of a heating coil unit is simple and can be easily assembled, and which can accurately and constantly maintain a distance between a top plate and heating coils, opposite side surfaces of a framework laid out below the top plate are configured to have first vertical parts, first horizontal parts, and second vertical parts. A heating coil supporting member that supports the heating coils is disposed to be bridged between the first horizontal parts of the opposite side surfaces of the framework, and the heating coil unit having the heating coil is configured to be securely supported by the first horizontal parts.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: August 8, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hidekazu Suzuki, Tomoya Takahashi, Kenji Ogawa, Hiroshi Isago, Shumpei Ando, Masahiro Yokono, Ryuuji Nagata, Katsuyuki Aihara, Shozo Ushio
  • Publication number: 20170217484
    Abstract: The steering control device includes: current command value 1 calculation unit 11 which determines current command value 1 based on a vehicle speed and a steering torque; current command value 2 calculation unit 14 which determines current command value 2 based on a filtered differential value of the steering torque; and current drive unit 10 which drives motor 5 so that the value of the motor current matches the sum of current command values 1 and 2. When a first crossover frequency represents the crossover frequency of control open loop characteristics in the steering control device as obtained when current command value 2 is determined using a differential value of the steering torque which has not been filtered, the notch frequency of the notch filter is set to be greater than the mechanical resonance frequency of the steering control device and smaller than the first crossover frequency.
    Type: Application
    Filed: September 12, 2014
    Publication date: August 3, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taizo TODA, Kenji OGAWA, Masaya ENDO
  • Patent number: 9673748
    Abstract: A motor control circuit controls an operation of a motor based on an input voltage and a control parameter. A voltage-abnormality detection unit detects abnormality of the input voltage by comparing the input voltage with an allowable voltage range. A memory stores therein a plurality of allowable voltage range candidates made to correspond to a plurality of reference voltages and a plurality of control parameter candidates made to correspond to the plurality of reference voltages. A reference-voltage acquisition unit acquires reference voltage information specifying one of the plurality of reference voltages.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: June 6, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kenji Ogawa
  • Patent number: 9642267
    Abstract: An antenna includes two elements having an antenna element which resonates by a frequency f1 and a ground wire element which resonates by a frequency f2 higher than the frequency f1. The antenna element is directed so that an antenna radiation part is located to be substantially parallel to a surface of a casing on which an operating part is provided. The ground wire element is directed so that a ground wire radiation part is located substantially vertically to the surface of the casing on which the operating part is provided. Further, a space between a feeding terminal connecting part of the antenna element and a ground terminal connecting part of the ground wire element is set to be equal to a space between a feeding terminal and a ground terminal and the feeding terminal connecting part is arranged to be parallel to the ground terminal connecting part.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: May 2, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kenji Ogawa, Yoshio Koyanagi, Kouta Aoki
  • Publication number: 20170066474
    Abstract: A steering control apparatus is obtained which includes an assist instruction-value correction device for calculating, based on a result of a friction transition-state determination device, an assist correction value in order to obtain an assist instruction-value after its correction being made by correcting a basic assist instruction-value so that a hysteresis width of steering torque increases at the time of turn-back steering, and an electric current driving device for driving a motor so that an electric current of the motor is coincident with an electric current instruction-value therefor after its correction being made on the basis of the assist instruction-value after its correction being made; and the friction transition-state determination device determines the friction transition-state by integrating a differential value of steering-shaft reaction torque using an integrator having a limiting function to an upper or lower limit value defined in advance.
    Type: Application
    Filed: May 30, 2014
    Publication date: March 9, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taizo TODA, Masaya ENDO, Yoshihiko KIMPARA, Kenji OGAWA
  • Patent number: 9522695
    Abstract: Provided are a steering control device and a steering control method therefor, which reduce a steering feeling of discomfort due to a pulsed change (short abrupt change) in steering assist torque caused when control such as steering wheel return control is turned on/off, and which acquire a sufficient control effect even when high control response is required, by reducing a fluctuation in steering assist torque caused when one steering assist torque is selected from two or more steering assist torques by low-pass filtering, and by correcting the low-pass filtering depending on a change amount of the selected steering assist torque.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: December 20, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Endo, Yoshihiko Kimpara, Hidetoshi Ikeda, Kenji Ogawa, Taizo Toda
  • Patent number: 9515581
    Abstract: Provided is a motor control device that includes an inverter circuit that includes a plurality of P-side switching elements and a plurality of N-side switching elements and drives a motor via a plurality of motor terminals; a first dynamic brake that brakes the motor by turning on all the phases of the plurality of P-side switching elements or turning on all the phases of the plurality of N-side switching elements; a second dynamic brake that brakes the motor by connecting dynamic brake resistors between the motor terminals; and a control unit that switches, according to the motor speed, between the first dynamic brake and the second dynamic brake, which are the dynamic brakes that brake the motor.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: December 6, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kenji Ogawa
  • Patent number: 9426879
    Abstract: For providing an electric connection box including a metal core board, which can limit increase of a size thereof and be prevented from bending along the slit, the electric connection box 10 includes a metal core board 1, in which a plurality of core metal plates 21, 22 is laminated and insulation resin is filled between each of the plurality of core metal plates 21, 22. The plurality of core metal plates 21, 22 are provide with slits 3A, 3B to divide the core metal plates 21, 22 to a plurality of separate plates 21a, 21b, 22a, 22b and be filled with insulation resin. The slits 3A, 3B is formed not to overlap each other on the same one line when viewing in a vertical direction about the metal core board 1. The electric connection box 10 distributes electric power inputted from a plurality of power systems to each separate plates 21a, 21b, 22a, 22b.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: August 23, 2016
    Assignee: YAZAKI CORPORATION
    Inventors: Manabu Ooishi, Maki Sugiura, Kazuhiro Yamamoto, Kenji Ogawa