Patents by Inventor Tatsuya Mori

Tatsuya Mori 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: 20240198467
    Abstract: A machine tool includes a bed, a column which is provided on the bed so as to be erected therefrom, a saddle which is a moving body supported by the column, and a tool spindle which is supported by the saddle and rotates a tool around a rotation center axis extending in a Z-axis direction parallel to a horizontal direction. The saddle has a frame portion which is provided so as to surround the tool spindle. The thickness of the frame portion in the Z-axis direction changes along a Y-axis direction parallel to a vertical direction, and becomes maximum at a first position-(Pa) closer to an upper end portion of the frame portion than a lower end portion of the frame portion.
    Type: Application
    Filed: April 15, 2021
    Publication date: June 20, 2024
    Applicant: DMG MORI CO., LTD.
    Inventors: Masahiko MORI, Mitsuru TAGA, Tadaharu MORIMOTO, Yoshinori YAMAMOTO, Tatsuya AIZAWA, Yusuke IKEDA, Naruhiro IRINO, Yosuke HIGUCHI, Hideki HARA
  • Patent number: 12014947
    Abstract: An electrostatic chuck includes a ceramic dielectric substrate, a base plate, and a first porous part. The ceramic dielectric substrate has a first major surface and a second major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided between the base plate and the first major surface. The ceramic dielectric substrate includes a first hole part. The first porous part includes a porous section, and a first compact section being more compact than the porous section. The porous section including a plurality of sparse portions including a plurality of pores including a first pore and a second pore, and a dense portion having a higher density than the sparse portion.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: June 18, 2024
    Assignee: Toto, Ltd.
    Inventors: Jun Shiraishi, Shuichiro Saigan, Tatsuya Mori, Masahiro Watanabe
  • Publication number: 20240189953
    Abstract: A machine tool includes a table, a first guide portion and a second guide portion that guide the table in the Z-axis direction and are arranged apart from each other in an X-axis direction, and a bed that includes a first guide mounting portion and a second guide mounting portion on which the first guide portion and the second guide portion are mounted respectively, and is provided with an opening portion which is located between the first guide mounting portion and the second guide mounting portion and penetrates in a Y-axis direction. The first guide mounting portion and the second guide mounting portion are respectively provided with a first facing surface and a second facing surface which face each other across the opening portion. The bed further includes a rib portion which is located in the opening portion and connected to the first facing surface and the second facing surface.
    Type: Application
    Filed: April 15, 2021
    Publication date: June 13, 2024
    Applicant: DMG MORI CO., LTD.
    Inventors: Masahiko MORI, Mitsuru TAGA, Tadaharu MORIMOTO, Yoshinori YAMAMOTO, Tatsuya AIZAWA, Yusuke IKEDA, Naruhiro IRINO, Yosuke HIGUCHI, Hideki HARA
  • Publication number: 20240159572
    Abstract: A resolver includes a rotor attached to a shaft of a rotating body, a stator, an excitation circuit, and an angle computation unit configured to compute a rotation angle of the rotor. Each tooth of the stator has line-symmetry with respect to a line connecting a center of a core back of the stator and centers of the teeth in a circumferential direction as viewed from an axial direction. A rotor outline is expressed by a function Rr(x(?), y(?)) defined by Equations (1) to (3), where an x and a y axes are axes of an orthogonal coordinate system having a center of the shaft as an origin, and an angle from a reference axis is ?, where a minimum distance from the center of the core back to the teeth is Ri, and a maximum distance is Ro, and a number of salient poles of the rotor is Nx.
    Type: Application
    Filed: April 15, 2021
    Publication date: May 16, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroko IKEDA, Shohei FUJIKURA, Kenta MOTOYOSHI, Yu HIROTANI, Hidenori SASAKI, Tatsuya MORI
  • Patent number: 11981849
    Abstract: Semiconductor nanoparticles are provided. The semiconductor nanoparticles contains Ag, at least one of In and Ga, and Se. An Ag content is 10 mol % to 30 mol %, a total content of the at least one of In and Ga is 15 mol % to 35 mol %, and an Se content is 35 mol % to 55 mol % in the semiconductor nanoparticles. The semiconductor nanoparticles emit light having an emission spectrum with a peak emission wavelength in a range of 500 nm to 900 nm, and a half bandwidth of 250 meV or less upon irradiation with light in a wavelength range of 350 nm to less than 500 nm.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: May 14, 2024
    Assignees: NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM, OSAKA UNIVERSITY, NICHIA CORPORATION
    Inventors: Tsukasa Torimoto, Tatsuya Kameyama, Hiroki Yamauchi, Chie Miyamae, Yuki Mori, Susumu Kuwabata, Taro Uematsu, Daisuke Oyamatsu
  • Publication number: 20240136915
    Abstract: A power converter includes: a multiphase inverter circuit including a plurality of switching elements; a plurality of current sensors each configured to detect a current of the inverter circuit and output a value of the current detected; a terminal voltage detector configured to detect a voltage of each terminal of a load connected to the inverter circuit and output a value of the voltage detected; a switching element drive circuit configured to control the plurality of switching elements of the inverter circuit according to a switching pattern given; a fault detector configured to detect a fault in the inverter circuit or the plurality of current sensors; and a fault identifier configured to, after the fault detector detects the fault, switch the switching pattern to be given to the switching element drive circuit according to types of faults detectable by the fault detector, and perform identification processing of identifying a type and a location of the fault in the inverter circuit or the plurality of cu
    Type: Application
    Filed: April 13, 2021
    Publication date: April 25, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroya NATSUHARA, Isao KEZOBO, Tatsuya MORI, Chiaki FUJIMOTO, Atsushi ITO, Yusuke TAKARADA
  • Patent number: 11958544
    Abstract: A control device for an electric power steering device includes an inverter converting direct current voltage into alternating current voltage, and apply to a synchronous motor; and a controller for converting three-phase current flowing in the synchronous motor into d-axis and q-axis currents, performing proportional integral control for a deviation between q-axis current command and the q-axis current so that the q-axis current follows the q-axis current command, to calculate q-axis voltage command, performing proportional integral control to calculate d-axis voltage command, converting the d-axis and q-axis voltage commands into three-phase voltage command, and controlling the inverter based on the three-phase voltage command. A q-axis proportional gain used in the proportional integral control for the q-axis current is obtained using a time constant of a q-axis current control system, a q-axis or d-axis inductance, and a constant greater than zero and less than one.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: April 16, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Yu Hirotani
  • Publication number: 20240121530
    Abstract: A light detector is configured such that a light receiving portion having APDs and a peripheral portion are provided on a first principal surface of a p-type semiconductor substrate, and further includes a back electrode provided on a second principal surface of the semiconductor substrate and a p-type first separation portion provided between the light receiving portion and the peripheral portion. The APD has, on a first principal surface side, an n-type region and a p-epitaxial layer contacting the n-type region in a Z-direction. The peripheral portion has an n-type MISFET provided at a p-well and an n-well provided to surround entire side and bottom portions of the p-well.
    Type: Application
    Filed: December 15, 2023
    Publication date: April 11, 2024
    Inventors: Tatsuya KABE, Hideyuki ARAI, Hisashi AIKAWA, Yuki SUGIURA, Akito INOUE, Mitsuyoshi MORI, Kentaro NAKANISHI, Yusuke SAKATA
  • Publication number: 20240120646
    Abstract: There is provided a metal plate antenna transmitting and receiving wireless signals conforming to a prescribed communication standard, wherein an antenna width is designed to satisfy radiation resistance achieving a prescribed standing wave ratio in a resonant mode in which a loop length of the metal plate antenna is 1.5 wavelength of a wireless signal conforming to the prescribed communication standard.
    Type: Application
    Filed: September 6, 2023
    Publication date: April 11, 2024
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Koji INAFUNE, Kenichi KOGA, Tatsuya KOIKE, Satoshi MORI
  • Patent number: 11942813
    Abstract: When a module controller of a battery system detects an abnormality of a battery module, the module controller selects the battery module without stopping the battery module. After that, the module controller compares a current value of a current supplied to a load, with a total value of rated currents of all battery modules that are normal and that are supplying power to the load. When the current value of the current supplied to the load is greater than the total value of the rated currents of the battery modules, the module controller performs a control to stop all the battery modules. When the current value of the current supplied to the load is less than or equal to the total value of the rated currents of all the battery modules that are supplying power to the load, the module controller performs a control to stop the abnormal battery module and not to stop the normal battery modules.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: March 26, 2024
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Tatsuya Suzuki, Michiya Mori
  • Patent number: 11936309
    Abstract: A permanent-magnet-synchronous electric motor control device includes: a reference voltage value calculation unit for calculating a reference voltage value; an output voltage value calculation unit for calculating an output voltage value on the basis of a voltage command; a current weakening command calculation unit for calculating a current weakening command on the basis of the reference voltage value and the output voltage value; a voltage command calculation unit for calculating the voltage command on the basis of the current weakening command; and a power converter for supplying power to a permanent-magnet-synchronous electric motor on the basis of the voltage command. The current weakening command calculation unit calculates the current weakening command in which a high-frequency component is amplified on the basis of the difference between the reference voltage value and the output voltage value.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: March 19, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuya Tsuchimoto, Tatsuya Mori, Akira Furukawa, Isao Kezobo, Genki Fujii
  • Patent number: 11936311
    Abstract: To provide a controller for motor which can reduce a torque ripple up to high frequency, without amplifying unnecessary noise and vibration. A controller for motor estimates an interlinkage flux based on the applied voltage and the detection value of current; estimates an output torque based on the detection value of current and the estimation value of interlinkage flux; extracts a pulsation component from the estimation value of output torque; calculates a voltage command correction value based on the extraction value of pulsation component; calculates a voltage command after superimposing by superimposing the voltage command correction value on the voltage command basic value; and applies voltage to winding based on the voltage command after superimposing.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: March 19, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Isao Kezobo, Masahiko Orii, Tatsuya Mori, Seiji Sawada, Kenta Kubo
  • Patent number: 11927882
    Abstract: A quartz glass plate has a quartz glass plate body and a quartz glass member adhered to the quartz glass plate body through an adhesive layer, where the adhesive layer contains silica, and a sum of concentrations of Li, Na, and K ions, being alkali metal ions and Ca ions, being alkaline earth metal ions contained in the adhesive layer is 10 ppm by mass or less. Consequently, a step with a uniform thickness can be formed, and a quartz glass plate is not easily damaged by irradiation with a light containing an ultraviolet ray.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: March 12, 2024
    Assignee: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
    Inventors: Tatsuya Mori, Akira Sato, Atsushi Shimada, Yuya Yokosawa, Nobumasa Yoshida
  • Publication number: 20240067258
    Abstract: A rotating machine control device comprises: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotating machine, based on a first direct-current voltage that has been output from a direct-current power supply of the first system; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotating machine, based on a second direct-current voltage that has been output from a direct-current power supply of the second system; a first controller; and a second controller, in that the first controller and the second controller each limit an own system voltage command related to a voltage to be applied to the three-phase windings of an own system by use of a direct-current voltage of an other system, in a case where a direct-current voltage of the own system is higher than the direct-current voltage of the other system, and also generate a value obtained by normalizing the own system voltag
    Type: Application
    Filed: April 16, 2021
    Publication date: February 29, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tomohiro TAMARU, Tatsuya MORI, Chiaki FUJIMOTO
  • Publication number: 20240072284
    Abstract: A fuel cell system for a load device may include a fuel cell, a battery, and a controller configured to control the fuel cell and the battery. The controller may be configured to: cumulatively calculate first accumulated electric energy generated by the fuel cell; cumulatively calculate a power generation efficiency average at the time of storage of the first accumulated electric energy; calculate required power generation efficiency to generate electric power that meets a power demand of the load device; under a first condition where the power generation efficiency average is lower than the required power generation efficiency, cause the fuel cell to generate electric power that meets the power demand; and under a second condition where the power generation efficiency average is higher, cause the fuel cell to generate electric power at a specific operating point and cause the battery to discharge deficient electric power.
    Type: Application
    Filed: August 10, 2023
    Publication date: February 29, 2024
    Inventors: Tatsuya FUKAMI, Kenji SATO, Hiroaki MORI
  • Publication number: 20240063746
    Abstract: To provide a controller for rotary machine which can reduce the effective value of the bus line AC component, by utilizing the degree of freedom that two set of armature windings and two sets of inverters are provided, without necessity to synchronize the on/off control timing of the switching devices of first set, and the on/off control timing of the switching devices of second set. A controller for rotary machine calculates the utilization factor setting command which makes the utilization factor ratio change from 1 to 1 so that an effective value of a bus line AC component which is an AC component superimposed on a bus current which flows through a bus line connecting between the DC power source and the two set of inverters becomes lower than a case where the utilization factor ratio is 1 to 1.
    Type: Application
    Filed: March 1, 2021
    Publication date: February 22, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Akira FURUKAWA
  • Publication number: 20240051598
    Abstract: A rotary machine control device includes: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotary machine, according to a first direct-current voltage; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotary machine; a first controller that generates a command value of a d-axis electric current of the first system, according to a direct-current voltage minimum value and a command value of the rotary machine, the direct-current voltage minimum value being a lower one of the first direct-current voltage and the second direct-current voltage, that generates a command value of a q-axis electric current of the first system, according to the direct-current voltage minimum value and the command value of the d-axis electric current of the first system, and that controls the first inverter, according to the command value of the d-axis electric current of the first system and the c
    Type: Application
    Filed: April 16, 2021
    Publication date: February 15, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuya TSUCHIMOTO, Tatsuya MORI, Chiaki FUJIMOTO, Kenta KUBO
  • Publication number: 20240025472
    Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can set a control gain which is used for controlling the d-axis current command value based on the q-axis current deviation between the current command value of q-axis and the current detection value of q-axis, considering the response of the current of q-axis. A controller for rotary electric machine changes the current command value of d-axis, based on a value obtained by multiplying a proportional gain to a q-axis current deviation which is a deviation between the current command value of q-axis and the current detection value of q-axis; and changes the proportional gain in inverse proportion to the rotational angle speed.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 25, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Jun KITAGAWA, Masahiko ORll, Kenta KUBO, Kenta SAWADA
  • Publication number: 20240007021
    Abstract: A modulation control unit calculates a voltage offset on the basis of fundamental or basic voltage references, and calculates modification voltage references by performing superposition of the voltage offset on the basic voltage references; and an inverter converts, on the basis of the modification voltage references calculated by the modulation control unit, a DC voltage into three-phase voltages whose voltages are applied to three-phase windings of an alternating current rotating machine, wherein, in a case in which the basic voltage references are transformed into three-phase voltage references, and when the three-phase voltage references are defined as a maximum phase, an intermediate phase and a minimum phase in decreasing order of value, the modulation control unit calculates a first voltage offset on the basis of the DC voltage, on that of the maximum phase, and on that of sum of squares of the basic voltage references.
    Type: Application
    Filed: December 15, 2020
    Publication date: January 4, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masahiko ORII, Tatsuya MORI, Kenta KUBO, Kento OGIWARA
  • Publication number: 20230412100
    Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can increases decreases an increase amount of the current of d-axis in the negative direction appropriately, and can perform the weakening magnetic flux appropriately, irrespective of increase and decrease in the rotational angle speed, without using the information on the inductance and the interlinkage flux of the rotor. A controller for rotary electric machine, in a case where the current command value of q-axis is a positive value, changes the current command value of d-axis, based on a deviation between an offset q-axis current command value obtained by subtracting the q-axis offset value of the positive value from the current command value of q-axis, and the current detection value of q-axis.
    Type: Application
    Filed: November 30, 2020
    Publication date: December 21, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun KITAGAWA, Tatsuya MORI, Masahiko ORII, Kenta KUBO, Kenta SAWADA