Patents by Inventor Kazumichi Yoshida

Kazumichi Yoshida 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: 20200295689
    Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a ?-axis current component I? corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.
    Type: Application
    Filed: March 11, 2020
    Publication date: September 17, 2020
    Inventors: Yuta TACHIBANA, Hiroyuki YOSHIKAWA, Yuji KOBAYASHI, Kazumichi YOSHIDA, Daichi SUZUKI, Harumitsu FUJIMORI
  • Publication number: 20200295688
    Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.
    Type: Application
    Filed: February 18, 2020
    Publication date: September 17, 2020
    Applicant: KONICA MINOLTA, INC.
    Inventors: Hiroyuki YOSHIKAWA, Yuta TACHIBANA, Yuji KOBAYASHI, Kazumichi YOSHIDA, Daichi SUZUKI, Harumitsu FUJIMORI
  • Patent number: 10752461
    Abstract: A line member connection device which applies an adhesive tape includes: a supply reel which supplies the adhesive tape; a cutter which cuts the adhesive tape drawn from the supply reel; and an intermediate roller via which the adhesive tape drawn from the supply reel is directed to the cutter, the intermediate roller being disposed between the supply reel and the cutter, wherein in cross section taken along a rotation axis of the intermediate roller, a surface of the first roller which supports the adhesive tape is shaped to have a straight section parallel to the rotation axis, and a first inclined section inclined relative to the rotation axis.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: August 25, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazumichi Shimizu, Yoshihiro Owaki, Masaki Yoshida, Akihiro Yamamoto, Yu Kawai
  • Publication number: 20200251184
    Abstract: The present invention provides a classification analysis method, a classification analysis device, and a storage medium for classification analysis, which enable, with high accuracy, the classification analysis of particulate or molecular analytes. As a means for solving the problem, a data group of particle-passage detection signals is based which are detected by a nanopore device 8 in accordance with passage of subject particles through a through-hole 12. A feature value is obtained in advance which indicates the feature of the waveform of the pulse signals corresponding to the passage of the predetermined analyte and the feature value obtained in advance is set as the learning data for the machine learning. The feature value obtained from the pulse signals of said analyzed data is set as a variable and the classification analysis on the predetermined analytes in the analyzed data can be performed by executing a classification analysis program due to the machine learning.
    Type: Application
    Filed: December 12, 2017
    Publication date: August 6, 2020
    Applicant: Osaka University
    Inventors: Takashi WASHIO, Tomoji KAWAI, Masateru TANIGUCHI, Makusu TSUTSUI, Kazumichi YOKOTA, Akira ISHI, Takeshi YOSHIDA
  • Patent number: 10734932
    Abstract: A motor controller that controls a motor in which a rotor using a permanent magnet is rotated by a rotating magnetic field due to a current flowing through a winding: performs hold control that continuously causes a fixed excitation current to flow through the winding to cause a fixed magnetic field for suppressing rotation of the rotor to be generated in a suspension period in which the motor is stopped; performs hold enhancement control that enhances the fixed magnetic field with input of a timing signal defined in advance as a trigger, in the suspension period; and starts rotational excitation control that generates the rotating magnetic field when a rotation start timing arrives.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: August 4, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Harumitsu Fujimori, Yuji Kobayashi, Kazumichi Yoshida
  • Publication number: 20200235683
    Abstract: A control circuit of a motor control device estimates an initial magnetic pole position of a rotor using an inductive sensing scheme. When estimating the initial magnetic pole position, a drive circuit applies a voltage to a stator winding at each of L electrical angles (L?5) while changing the L electrical angles. An absolute value of an electrical angle difference of the voltage applied to the stator winding between an i-th time (2?i?L) and an i?1st time is 180?360/L degrees or more and 180+360/L degrees or less. An absolute value of an electrical angle difference of the voltage applied to the stator winding between a 1st time for initial position estimation and a last time before starting initial position estimation is 180?360/L degrees or more and 180+360/L degrees or less.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 23, 2020
    Applicant: KONICA MINOLTA, INC.
    Inventors: Daichi SUZUKI, Yuji KOBAYASHI, Kazumichi YOSHIDA, Harumitsu FUJIMORI, Yuta TACHIBANA, Hiroyuki YOSHIKAWA
  • Publication number: 20190341866
    Abstract: A motor controller that controls a motor in which a rotor using a permanent magnet is rotated by a rotating magnetic field due to a current flowing through a winding: performs hold control that continuously causes a fixed excitation current to flow through the winding to cause a fixed magnetic field for suppressing rotation of the rotor to be generated in a suspension period in which the motor is stopped; performs hold enhancement control that enhances the fixed magnetic field with input of a timing signal defined in advance as a trigger, in the suspension period; and starts rotational excitation control that generates the rotating magnetic field when a rotation start timing arrives.
    Type: Application
    Filed: April 11, 2019
    Publication date: November 7, 2019
    Applicant: KONICA MINOLTA, INC.
    Inventors: Harumitsu Fujimori, Yuji Kobayashi, Kazumichi Yoshida
  • Publication number: 20190257787
    Abstract: The present invention provides a number analyzing method, a number analyzing device, and a storage medium for number analysis, which enable, with high accuracy, analysis of the number or number distribution of particulate or molecular analytes according to the kinds of the analytes. A computer control program is executed on the basis of a data group of particle-passage detection signals which are detected by a nanopore device (8) in accordance with passage of subject particles through a through-hole (12). Also, a particle type distribution estimating program, which is a number deriving means, is executed, to estimate probability density on the basis of a data group based on feature values indicating feature of the waveforms of pulse signals which correspond to the passage of particles and which are obtained as the particle-passage detection signals. Thus, the number of particles can be derived for each particle type.
    Type: Application
    Filed: December 19, 2016
    Publication date: August 22, 2019
    Applicant: Osaka University
    Inventors: Takashi WASHIO, Tomoji KAWAI, Masateru TANIGUCHI, Makusu TSUTSUI, Kazumichi YOKOTA, Akira ISHI, Takeshi YOSHIDA
  • Publication number: 20190068099
    Abstract: A motor controller for controlling a brushless DC motor is provided. The motor controller includes a vector control unit configured to perform a sensorless vector control on the brushless DC motor in accordance with an input command value; a storage portion configured to store time-series control target values so that an amount of rotation angle of the brushless DC motor transitions in a same manner as an expected pattern; and a command portion configured to input, to the vector control unit, the control target values serially as the command value.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 28, 2019
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kazumichi Yoshida, Yuji Kobayashi, Harumitsu Fujimori
  • Publication number: 20180175751
    Abstract: A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet is provided. The rotor rotates by a rotating magnetic field caused by a current flowing through an armature. The controller starts a deceleration control of reducing a rotational speed of the rotor when a stop command is inputted in a state where the rotor rotates at a predetermined rotational speed; and performs a fixed excitation control when the rotational speed is reduced to a set speed. The fixed excitation control includes setting a current for causing a magnetic field vector for stopping the rotor at a target position in accordance with an amount of rotation of the rotor since the deceleration control has started and passing the current through the armature.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 21, 2018
    Applicant: Konica Minolta, Inc.
    Inventors: Kazumichi Yoshida, Katsuhide Sakai, Tomonobu Tamura, Hitoshi Asano, Harumitsu Fujimori
  • Publication number: 20180076750
    Abstract: A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet includes a drive portion configured to apply a current to a winding to drive the rotor; an estimating portion configured to estimate a position of magnetic pole of the rotor; and a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated position of magnetic pole and to control the drive portion to stop the rotor in response to a stop command inputted. The control unit controls, as the control to stop the rotor, the drive portion to determine a current for generating a magnetic field vector which draws the position of magnetic pole of the rotor to a stop position to stop the rotor based on a latest estimated position of magnetic pole, and to keep applying the current determined to the winding.
    Type: Application
    Filed: August 22, 2017
    Publication date: March 15, 2018
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kazumichi YOSHIDA, Katsuhide SAKAI, Tomonobu TAMURA, Hitoshi ASANO, Harumitsu FUJIMORI
  • Patent number: 4113441
    Abstract: A steam reactor comprises a pressure shell having inlet and outlet nozzles for each of a process gas and a heating gas, a plurality of metal catalyst tubes packed with a catalyst and located substantially vertically within the pressure shell, one and of each of the catalyst tubes being connected to a pipe and the other end being communicated with the inlet nozzle of the process gas; and a riser pipe located substantially vertically within the pressure shell, one end of the riser pipe being connected to the pipes and the other end being terminated in the outlet nozzle of the process gas. A support member is provided on the pressure shell to support the catalyst tubes and the riser pipe. The plurality of pipes which connect the catalyst tubes and the riser pipe have a diameter which is smaller than that of the catalyst tubes and the riser pipe and a structure capable of taking up the difference in thermal expansion between the catalyst tubes and the riser pipe.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: September 12, 1978
    Assignee: Director-General Agency of Industrial Science and Technology
    Inventors: Akira Suzuki, Kantaro Nakamura, Tetsuo Maejima, Masaru Kajiura, Toshio Aso, Shoichi Abe, Toshihisa Suzuki, Katsuaki Takemura, Masaya Kuno, Kazumichi Yoshida, Junji Yokokawa, Takeshi Miyasugi, Hiroshi Yagi, Kiyohisa Mukai