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: 20230013379
    Abstract: Provided is a resolver capable of increasing an accuracy of a detected angle of the resolver. The resolver includes: a stator; and a rotor, wherein the rotor includes a plurality of salient poles; wherein the stator includes: a stator core having a plurality of teeth, and a plurality of winding groups each of which is provided on each of the plurality of teeth, wherein the winding groups are divided into two systems, wherein the numbers of turns of the excitation windings are distributed in a form of a sine wave of Ne-th spatial order, wherein each of the numbers of turns of a first output windings and the numbers of turns of a second output windings are distributed in a form of a sine wave of |Ne±Nx|-th spatial order, and wherein the following expressions are satisfied, Nout1=N1 cos{|Ne±Nx|(i?1)/Ns×2?+?}, Nout2=N1 cos{|Ne±Nx|(i?1)/Ns×2?+?}, and 90(deg)<|???|<140(deg).
    Type: Application
    Filed: January 17, 2020
    Publication date: January 19, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroko IKEDA, Tatsuya MORI, Toshihiro MATSUNAGA, Kenji IKEDA, Kenta KUBO
  • Publication number: 20230001979
    Abstract: To provide a control apparatus for AC rotary machine and an electric power steering apparatus which can reduce the error component of the current detection value close to the mechanical resonance period of AC rotary machine. A control apparatus for AC rotary machine detects currents which flow into three-phase windings at a current detection period which is a first natural number times of a carrier period; calculates current detection values, by performing a current addition processing which adds current detection values detected at this time, and current detection values detected before an addition period which is a second natural number times of the current detection period; and calculates the voltage command values of three-phase based on the current detection values after current addition processing, wherein the second natural number is set to a natural number that the addition period becomes the closest to the half period of the mechanical resonance period.
    Type: Application
    Filed: January 15, 2020
    Publication date: January 5, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Kenta KUBO, Itaru IKI, Yu HIROTANI
  • Publication number: 20220393627
    Abstract: To provide a motor controller which can suppress occurrence of a torque difference between systems, even if a DC voltage difference occurs between systems, in the case where each system is provided with a DC power source. A motor controller is provided with a first controller that controls so that the first q-axis current detection value approaches the second q-axis current detection value or the second q-axis current command value obtained from the second controller, when determining that the first DC voltage is higher than the second DC voltage; and a second controller that controls so that the second q-axis current detection value approaches the first q-axis current detection value or the first q-axis current command value obtained from the first controller, when determining that the second DC voltage is higher than the first DC voltage.
    Type: Application
    Filed: November 27, 2019
    Publication date: December 8, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun KITAGAWA, Tatsuya MORI, Hiroko IKEDA, Haruna KOYAMA, Kenta KUBO
  • Publication number: 20220376641
    Abstract: To provide an AC rotary machine apparatus which can determine the operation stop of the control circuit of the other system with good accuracy. An AC rotary machine apparatus, including: a resolver is provided with a first system excitation winding, first system two output windings, a second system excitation winding, and second system two output windings, in which a magnetic interference occurs between a first system and a second system; a first system control circuit that applies AC voltage with a first period to the first system excitation winding; and a second system control circuit that applies AC voltage with a second period to the second system excitation winding, wherein the first system control circuit determines whether the operation of the second system control circuit stops, based on the components of the second period extracted from the first system output signals.
    Type: Application
    Filed: September 26, 2019
    Publication date: November 24, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Hiroko IKEDA, Toshihiro MATSUNAGA, Kenji IKEDA, Kenta KUBO
  • Publication number: 20220363310
    Abstract: The redundant resolver includes: a resolver body having a rotor, a stator opposed to the rotor and having Ns teeth arranged in a circumferential direction, and an excitation winding and two phases of output windings wound on the stator; an excitation circuit configured to supply power to the excitation winding; and an angle calculation unit configured to calculate a rotation angle on the basis of signals from the two phases of output windings. The stator is divided in the circumferential direction into M pieces which serve as M tooth blocks, N (M?N) redundancy systems are formed on the basis of the M tooth blocks. The excitation circuit and the angle calculation unit are provided to each system so as be independent among the systems. Gap magnetic flux densities at both end portions of each tooth block are set to change mildly.
    Type: Application
    Filed: November 18, 2019
    Publication date: November 17, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroko IKEDA, Tatsuya MORI, Toshihiro MATSUNAGA, Kenji IKEDA, Kenta KUBO
  • Publication number: 20220296502
    Abstract: Non-aqueous patches comprising lidocaine, which is not dissolved and is present in a crystalline state, have poor permeability to the skin. Therefore, non-aqueous patches have a high concentration of lidocaine. It is pointed out that lidocaine has an adverse effect on the heart. Prolonged use of a high concentration of lidocaine causes side effects, such as shock, rubor, and irritating sensation. External preparations comprising more than 5 mass % of lidocaine are designated as powerful drugs, and cannot be used as household (nonprescription) medicine. Provided is a non-aqueous patch that is effective to relieve muscle pain, the non-aqueous patch comprising lidocaine and/or its reactant, and a dissolving agent composed of an organic acid and a polyalcohol, which are contained in a base.
    Type: Application
    Filed: February 8, 2022
    Publication date: September 22, 2022
    Inventors: Tatsuya MORI, Naoyuki SAIDA
  • Patent number: 11431273
    Abstract: To provide a controller for a rotary machine which can simplify a configuration required for checking the shutoff function of the switching device, and an electric power steering apparatus therewith. A controller for a rotary machine performs a high potential side forcible shutoff which forcibly shuts off a high potential side switching device of a diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes positive, or a low potential side forcible shutoff which forcibly shuts off a low potential side switching device of the diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes negative; and determines failure of the device shutoff unit based on a detection value of current or voltage when performing the high potential side forcible shutoff or the low potential side forcible shutoff.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: August 30, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Furukawa, Tatsuya Mori, Munenori Yamamoto
  • Patent number: 11417556
    Abstract: According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, a base plate, and first and second porous parts. The ceramic dielectric substrate includes first and second major surfaces. The second major surface is opposite to the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided in the ceramic dielectric substrate and is opposite to the gas feed channel. The second porous part is provided in the base plate and is opposite to the gas feed channel. The ceramic dielectric substrate includes a first hole part positioned between the first major surface and the first porous part. The first porous part includes a first porous region including pores and a first dense region. The second porous part includes a second porous region including pores and a second dense region.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: August 16, 2022
    Assignee: Toto Ltd.
    Inventors: Jun Shiraishi, Shuichiro Saigan, Tatsuya Mori, Masahiro Watanabe, Yuki Sasaki
  • Publication number: 20220224266
    Abstract: To provide a controller for AC rotary electric machine and an electric power steering apparatus which can superimposes a cancellation current for canceling the torque ripple component on the winding current in feedforward manner and cancel the torque ripple component. A controller for AC rotary electric machine calculates an oscillation voltage command value of q-axis which has the same frequency as the torque ripple component; calculates a reverse phase of the torque ripple component based on the current information and the magnetic pole position; calculates a correction phase corresponding to the phase delay of the actual current with respect to the oscillation voltage command value of q-axis; and sets a phase of the oscillation voltage command value of q-axis to a phase obtained by advancing the reverse phase of the torque ripple component by the correction phase.
    Type: Application
    Filed: July 30, 2019
    Publication date: July 14, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Masahiko ORII, Genki FUJII, Yu HIROTANI
  • Publication number: 20220224172
    Abstract: In a redundancy resolver device, winding groups of different systems are arranged at different positions in a circumferential direction of a stator core. The winding groups of each system include: an excitation winding group consisting of a plurality of excitation windings, and being connected to corresponding one of excitation circuits; a first output winding group; and a second output winding group. Each of the teeth has corresponding one of the excitation windings wound therearound. When two of the excitation windings belonging to different systems and being arranged side by side is the circumferential direction of the stator core are defined as a first end excitation winding and a second end excitation winding, respectively, the first end excitation winding and the second end excitation winding are applied with excitation signals to generate magnetic fluxes in the same direction of radial directions of the stator core.
    Type: Application
    Filed: May 24, 2019
    Publication date: July 14, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroko IKEDA, Tatsuya MORI, Kenta MOTOYOSHI, Kodai OKAZAKI, Kenji IKEDA, Yosuke SUGINO, Seiji SAWADA, Kenta KUBO, Toshihiro MATSUNAGA
  • Publication number: 20220199452
    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: Application
    Filed: March 9, 2022
    Publication date: June 23, 2022
    Inventors: Jun SHIRAISHI, Shuichiro SAIGAN, Tatsuya MORI, Masahiro WATANABE
  • Publication number: 20220181998
    Abstract: An electric motor control device, capable of suppressing a torque ripple even when electrical characteristics on a motor have errors or variations, comprises: a fundamental electric-current instruction generator for outputting d-axis and q-axis fundamental electric-current instructions for outputting fundamental torque from the motor having saliency; a position dependency component generator for outputting a position dependency component(s) of the motor according to its rotational position; an electric current correction instruction calculator for calculating d-axis and q-axis current correction instructions from the d-axis and q-axis fundamental electric-current instructions, and the position dependency component(s); an electric current correction instruction superposition unit for generating d-axis and q-axis current instructions by performing superposition of the d-axis and q-axis current correction instructions on the d-axis and q-axis fundamental electric-current instructions; and an electric current con
    Type: Application
    Filed: June 27, 2019
    Publication date: June 9, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masahiko ORII, Isao KEZOBO, Tatsuya MORI, Genki FUJII
  • Publication number: 20220166356
    Abstract: To provide a controller for rotary electric machine which can suppress the increase in the switching frequency by the voltage for estimation while reducing the estimation delay of the magnetic pole position (the rotational angle). A controller for rotary electric machine turns on and off switching devices which the inverter has and applies voltage to the winding, based on a comparison result between the voltage command and the carrier wave; generates the voltage command for estimation of a preliminarily set one period on a stationary coordinate system fixed to the winding; generates the carrier wave of the same one period as the one period of the voltage command for estimation; extracts the frequency component of the one period of the voltage command for estimation from the current detection value; and estimates a rotational angle based on the frequency component.
    Type: Application
    Filed: June 4, 2019
    Publication date: May 26, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun KITAGAWA, Tatsuya MORI, Isao KEZOBO, Seiji SAWADA, Kenta KUBO
  • Publication number: 20220120590
    Abstract: There has been a problem that a rotation second-order angle error due to a phase difference between a sine signal and a cosine signal deviating from ?/2 cannot be reduced. Therefore, provided is an angle detection device that can suppress a second-order angle error caused due to the phase difference between a first sine signal and a second sine signal deviating from ?/2, by calculating a detection angle from a first detection signal based on the sum of two sine signals having different phases and a second detection signal based on the difference of the two sine signals.
    Type: Application
    Filed: July 4, 2019
    Publication date: April 21, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira FURUKAWA, Tatsuya MORI
  • Patent number: 11309204
    Abstract: According to one embodiment, 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. As projected on a plane perpendicular to a first direction from the base plate to the ceramic dielectric substrate, the first compact section is configured to overlap the first hole part, and the porous section is configured not to overlap the first hole part.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: April 19, 2022
    Assignee: Toto Ltd.
    Inventors: Jun Shiraishi, Shuichiro Saigan, Tatsuya Mori, Masahiro Watanabe
  • Publication number: 20220115570
    Abstract: Provided is a silica glass member for hermetic sealing of an ultraviolet SMD LED element to be suitably used for hermetic sealing of, and as a transmission window material for, a surface mount-type package (SMD) having an ultraviolet LED mounted thereon and configured to emit ultraviolet light in a wavelength range of from 200 nm to 350 nm.
    Type: Application
    Filed: December 22, 2021
    Publication date: April 14, 2022
    Inventors: Akira FUJINOKI, Hiroyuki NISHIMURA, Akira SATO, Yuya YOKOSAWA, Tatsuya MORI
  • Publication number: 20220103102
    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: Application
    Filed: May 30, 2019
    Publication date: March 31, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Isao KEZOBO, Masahiko ORII, Tatsuya MORI, Seiji SAWADA, Kenta KUBO
  • Publication number: 20220103110
    Abstract: A power conversion device is configured to acquire, from a current detector at a timing A, a first phase current detection value in a first phase being a phase corresponding to a phase voltage command to be compared to a first carrier wave signal, calculate a first phase current calculation value corresponding to the first phase based on an acquisition result, acquire, from the current detector at a timing B, a second phase current detection value in a second phase being a phase corresponding to a phase voltage command to be compared to a second carrier wave signal, and to calculate a second phase current calculation value corresponding to the second phase based on an acquisition result.
    Type: Application
    Filed: February 19, 2019
    Publication date: March 31, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Akira FURUKAWA, Kenta KUBO
  • Patent number: 11278623
    Abstract: Non-aqueous patches comprising lidocaine, which is not dissolved and is present in a crystalline state, have poor permeability to the skin. Therefore, non-aqueous patches have a high concentration of lidocaine. It is pointed out that lidocaine has an adverse effect on the heart. Prolonged use of a high concentration of lidocaine causes side effects, such as shock, rubor, and irritating sensation. External preparations comprising more than 5 mass % of lidocaine are designated as powerful drugs, and cannot be used as household (nonprescription) medicine. Provided is a non-aqueous patch that is effective to relieve muscle pain, the non-aqueous patch comprising lidocaine and/or its reactant, and a dissolving agent composed of an organic acid and a polyalcohol, which are contained in a base.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: March 22, 2022
    Assignees: ITOCHU CHEMICAL FRONTIER Corporation, OISHI KOSEIDO CO., LTD.
    Inventors: Tatsuya Mori, Naoyuki Saida
  • Patent number: 11276602
    Abstract: According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, a base plate, and a first porous part. The ceramic dielectric substrate includes first and second major surfaces, and at least one groove. The second major surface is opposite to the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided between the groove and the gas feed channel. The ceramic dielectric substrate includes holes communicating with the groove and the gas feed channel and piercing the ceramic dielectric substrate in a first direction from the base plate toward the ceramic dielectric substrate. The first porous part includes at least one porous region including pores, and at least one dense region denser than the porous region. The porous region further includes at least one dense part.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: March 15, 2022
    Assignee: Toto Ltd.
    Inventors: Jun Shiraishi, Shuichiro Saigan, Tatsuya Mori, Masahiro Watanabe, Yuki Sasaki