Patents by Inventor Tatsuya Kubo
Tatsuya Kubo 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).
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Patent number: 12189331Abstract: A positioning member defines a facing distance between a first rotating body and a second rotating body. The positioning member includes a fitting portion, a groove, and a restricting member. A fitted portion of the first rotating body is to be rotatably fitted into the fitting portion. The groove has a groove shape extending in a predetermined direction from an opening to an abutting portion. A shaft portion of the second rotating body is to be slidably movable in the groove. The restricting member restricts movement of the shaft portion in the predetermined direction in a state in which the shaft portion abuts on the abutting portion in the groove. The restricting member is detachably disposed on the groove.Type: GrantFiled: August 17, 2021Date of Patent: January 7, 2025Assignee: RICOH COMPANY, LTD.Inventors: Kazuki Yogosawa, Tatsuya Kubo, Yuuki Tsuchiya, Shinya Karasawa
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Patent number: 12184206Abstract: 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: GrantFiled: June 4, 2019Date of Patent: December 31, 2024Assignee: Mitsubishi Electric CorporationInventors: Jun Kitagawa, Tatsuya Mori, Isao Kezobo, Seiji Sawada, Kenta Kubo
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Patent number: 12166439Abstract: To provide a rotary electric machine apparatus which can perform current control which reduces a torque ripple component effectively, using a rotary electric machine in which the permanent magnet of the rotor has the skew structure which shifts the magnetic pole position in the circumferential direction at each position in the axial direction. When defining, as the current vector of most advanced phase, a current vector of current command values calculated on the dq-axis rotating coordinate system of most advanced phase, and defining, as the current vector of middle phase, a current vector of current command values calculated on the dq-axis rotating coordinate system of middle phase, the rotary electric machine apparatus brings a controlling current vector close to the current vector of most advanced phase from the current vector of middle phase, as the winding currents increase.Type: GrantFiled: March 2, 2020Date of Patent: December 10, 2024Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Kenta Kubo, Yu Hirotani
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Patent number: 12163809Abstract: A resolver body including a rotor having Nx (Nx is a natural number) salient poles, a stator facing the rotor and having Ns (Ns is an integer equal to or larger than 3) teeth arranged in a circumferential direction, and an excitation winding and two phases of output windings wound on each tooth; and an excitation circuit configured to apply voltage to the excitation winding. The excitation winding and the two phases of output windings wound on each of Nsm (Nsm is an integer equal to or larger than 2) teeth among the Ns teeth are set to be of a main system. The excitation winding and the two phases of output windings wound on each of Ns-Nsm teeth are set to be of a sub-system. The number Nsm of the teeth corresponding to the main system is larger than the number Ns-Nsm of the teeth corresponding to the sub-system.Type: GrantFiled: April 9, 2020Date of Patent: December 10, 2024Assignee: Mitsubishi Electric CorporationInventors: Hiroko Ikeda, Shohei Fujikura, Tatsuya Mori, Kenji Ikeda, Kenta Kubo, Toshihiro Matsunaga
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Publication number: 20240400895Abstract: Semiconductor nanoparticles that include a compound semiconductor mainly containing a Ag component, a Ge component, and a S component, wherein a content ratio of the Ag component to the Ge component is 1.0 or more and less than 7.Type: ApplicationFiled: August 12, 2024Publication date: December 5, 2024Inventors: Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Junya KUBO, Norikazu FUJIHIRA
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Patent number: 12155330Abstract: 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: GrantFiled: February 19, 2019Date of Patent: November 26, 2024Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Akira Furukawa, Kenta Kubo
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Patent number: 12152914Abstract: To solve a problem that the accuracy of angle detection deteriorates owing to noise voltage generated by eccentricity or variation in shape among rotors according to the number of magnetic poles of a rotor core of a multiple-system rotation sensor, the number S of magnetic poles of a stator core is, with the number R of the magnetic poles of the rotor core and the number N (N is a natural number equal to or larger than 2) of systems for stator windings, in a relationship of S=nRN (n is a natural number), system windings of each system are wound so as to be divided for every R magnetic poles among the S magnetic poles of the stator core, and a winding arrangement of the system windings of each system is made so as to achieve R-times rotational symmetry about a rotor rotation axis.Type: GrantFiled: April 9, 2020Date of Patent: November 26, 2024Assignee: Mitsubishi Electric CorporationInventors: Shohei Fujikura, Hiroko Ikeda, Tatsuya Mori, Kenji Ikeda, Kenta Kubo, Toshihiro Matsunaga
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Publication number: 20240387784Abstract: Provided is an efficient method for producing semiconductor nanoparticles that exhibit band edge emission. The method comprises performing a first heat treatment of a first mixture, which contains a Cu salt, a Ag salt, a salt containing at least one of In or Ga, a gallium halide, and an organic solvent, to obtain first semiconductor nanoparticles. At least one of the Cu salt, the Ag salt, or the salt containing at least one of In or Ga in the first mixture contains a compound having a bond formed of a metal and sulfur.Type: ApplicationFiled: July 8, 2022Publication date: November 21, 2024Applicants: NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM, OSAKA UNIVERSITY, NICHIA CORPORATIONInventors: Tsukasa TORIMOTO, Tatsuya KAMEYAMA, Susumu KUWABATA, Taro UEMATSU, Tomoya KUBO, Yohei IKAGAWA, Daisuke OYAMATSU
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Patent number: 12150359Abstract: A display device includes a plurality of pixel electrodes, a common electrode common to the plurality of pixel electrodes, and a light-emitting layer sandwiched between the plurality of pixel electrodes and the common electrode. The light-emitting layer includes quantum dots covered by ferritin. Each of the plurality of pixel electrodes and the quantum dots are bonded via a peptide modifying the ferritin.Type: GrantFiled: October 2, 2019Date of Patent: November 19, 2024Assignee: SHARP KABUSHIKI KAISHAInventors: Hirofumi Yoshikawa, Tatsuya Ryohwa, Masumi Kubo, Takahiro Doe, Masaki Yamamoto
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Patent number: 12150326Abstract: A display device includes: ferritin encaging a first quantum dot and modified with a first peptide bound to a first pixel electrode; and ferritin encaging a second quantum dot and modified with a second peptide bound to a second pixel electrode. A first metal material and a second metal material are of different types.Type: GrantFiled: October 2, 2019Date of Patent: November 19, 2024Assignee: SHARP KABUSHIKI KAISHAInventors: Hirofumi Yoshikawa, Tatsuya Ryohwa, Masumi Kubo, Takahiro Doe, Masaki Yamamoto
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Patent number: 12128967Abstract: 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: GrantFiled: January 15, 2020Date of Patent: October 29, 2024Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Kenta Kubo, Itaru Iki, Yu Hirotani
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Patent number: 12132423Abstract: To provide a controller for AC rotary electric machine which can suppress the increase in the unwanted sound while reducing noise. A controller for AC rotary electric machine switches n pieces of zero phase candidate voltage values in order for every switching period and calculate as a zero phase voltage value; by defining a deviation between the zero phase voltage value and a time lag zero phase voltage value delaying by a j times value of the switching period, as a zero phase time lag deviation value; j is a natural number which minimizes a difference between a half period of a mechanical resonance period, and the j times value of switching period; an effective value of the zero phase time lag deviation value becomes small, compared with an effective value of AC component of the zero phase voltage value.Type: GrantFiled: June 18, 2020Date of Patent: October 29, 2024Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Akira Furukawa, Kenta Kubo
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Patent number: 12085418Abstract: To provide an abnormality detection apparatus for resolver which can determine the abnormality of at least the first system, even if the period of the excitation AC voltage of the first system and the period of the excitation AC voltage of the second system are different periods, and the magnetic interference between systems occurs. An abnormality detection apparatus for resolver applies an AC voltage of a first period to a first system excitation winding; applies an AC voltage of a second period different from the first period to a second system excitation winding; calculates DC values of first system two output signals by performing a DC extraction processing; and determines abnormality of first system based on whether or not the DC values of first system two output signals are within a normal range.Type: GrantFiled: February 26, 2020Date of Patent: September 10, 2024Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
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SULFUR-BASED ACTIVE MATERIAL, ELECTRODE, LITHIUM-ION SECONDARY BATTERY, AND PRODUCING METHOD THEREOF
Publication number: 20240290969Abstract: Provided is a method of producing a sulfur-based active material, the method comprising the steps of: (1) mixing an acrylic resin, sulfur, and an iron compound comprising a divalent or trivalent iron ion to obtain a raw material; and (2) baking the raw material, characterized in that a volume energy density is improved while maintaining a capacity retention rate of the active material that constitutes an electrode of a lithium-ion secondary battery.Type: ApplicationFiled: March 31, 2022Publication date: August 29, 2024Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Fumiya CHUJO, Tatsuya KUBO -
Patent number: 12068702Abstract: In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.Type: GrantFiled: May 19, 2020Date of Patent: August 20, 2024Assignee: Mitsubishi Electric CorporationInventors: Masahiko Orii, Tatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
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Publication number: 20240272566Abstract: A toner container is attachable to and detachable from a body of an image forming apparatus and includes a substantially cylindrical container body and a substantially cylindrical cap. The container body conveys toner stored inside the container body. The cap has a through hole through which a toner conveying nozzle disposed in the body of the image forming apparatus is to be inserted into the container body. The through hole is in a central portion of the cap. The cap has a fitted portion to be fitted with a fitting portion disposed in the body of the image forming apparatus to position the cap non-rotatably to the body of the image forming apparatus. The fitted portion is disposed in each of an upper portion and a lower portion of the cap when the cap is attached to the body of the image forming apparatus.Type: ApplicationFiled: January 24, 2024Publication date: August 15, 2024Inventors: Kentaro NODERA, Tatsuya KUBO, Hideo YOSHIZAWA
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Patent number: 12058835Abstract: An information processing apparatus comprises a first heat generation circuit, a second heat generation circuit, a blocking assembly, and a processor. The blocking assembly performs a first operation of blocking air flowing from the first heat generation circuit toward the second heat generation circuit or a second operation of passing the air, and the processor is configure to instruct the blocking assembly to perform the first operation in a case where a temperature of the air is higher than a predetermined value, and instruct the blocking assembly to perform the second operation in a case where the temperature of the air is lower than the predetermined value.Type: GrantFiled: April 27, 2022Date of Patent: August 6, 2024Assignee: FUJITSU LIMITEDInventors: Kiichi Koyama, Tatsuya Sudo, Kazuo Tanaka, Hirotaka Shikada, Hiroshi Nagaoka, Hirofumi Konno, Takatoshi Katou, Nobuyoshi Aida, Masafumi Asano, Kazuo Kubo
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THREE-DIMENSIONAL MEMORY DEVICE CONTAINING SILICON OXYCARBIDE LINERS AND METHODS OF FORMING THE SAME
Publication number: 20240260266Abstract: A memory device includes an alternating stack of insulating layers and electrically conductive layers, such that a first electrically conductive layer of the electrically conductive layers is in contact with an underlying silicon oxycarbide liner and with an overlying silicon oxycarbide liner, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical semiconductor channel and a memory film containing a continuous memory material layer which continuously extends through the entire alternating stack.Type: ApplicationFiled: July 21, 2023Publication date: August 1, 2024Inventors: Naohiro HOSODA, Masanori TSUTSUMI, Shunsuke TAKUMA, Seiji SHIMABUKURO, Tatsuya HINOUE, Takashi KASHIMURA, Tomohiro KUBO, Hisakazu OTOI, Hiroyuki TANAKA, Takumi MORIYAMA, Ryota SUZUKI -
Publication number: 20240198534Abstract: A robot inspection system includes a coupling unit to which a mount table with a robot mounted thereon is coupled, a positioning mechanism positioning the coupling unit and the mount table, and an inspection unit performing an inspection of the robot with the mount table coupled to the coupling unit. Further, the mount table is transported to the coupling unit by an automatic guided vehicle. Furthermore, the inspection unit performs a plurality of types of inspections on the robot. Moreover, the coupling unit includes a recessed portion having an entry opening entered by the mount table, and the inspection unit is placed around the recessed portion.Type: ApplicationFiled: December 14, 2023Publication date: June 20, 2024Inventors: Shota URUMA, Tatsuya Kubo, Hiroyuki Shindo
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Publication number: 20240140642Abstract: A packing member, a toner container, and a packing method. The packing member contains the toner container, and the packing member includes a box containing the toner container with a gap between one side of the box and a container body and between the one side of the box and a large-dimension portion of the toner container, a first pressing portion that presses the container body, and a second pressing portion that presses the large-dimension portion. In the packing member, the large-dimension portion of the toner container is disposed at one end of the container body, and the large-dimension portion has a wider dimension than the container body in a direction orthogonal to a longitudinal direction of the toner container. In the packing member, the container body contacts, with first contact force, a first bearer inside the box to maintain the gap.Type: ApplicationFiled: October 26, 2023Publication date: May 2, 2024Inventors: Shuntaroh TAMAKI, Seiji TERAZAWA, Yosio SANO, Teruo SHIBATA, Tatsuya KUBO