公开(公告)号：US20240272107A1

公开(公告)日：2024-08-15

申请号：US18567069

申请日：2022-06-09

Applicant: NAGAOKA UNIVERSITY OF TECHNOLOGY ,  KOA CORPORATION

Inventor： Tomoichiro OKAMOTO ,  Kenichi IGUCHI ,  Yukiko OTA ,  Ryosuke KOMATSU ,  Tetsuro TANAKA ,  Katsuhide NISHIZAWA

IPC: G01N27/12 ,  G01N33/00

CPC classification number: G01N27/125 ,  G01N33/0036

Abstract: An oxygen sensor element that can achieve electric power saving without losing sensor characteristics has a structure in which an outer surface of a ceramic sintered body as a sensing layer made of a composition LnBa2Cu3O7−δ (Ln denotes rare earth element) is covered with heat insulating layers. A heat insulating material having a composition Ln2BaCuO5 is used for the heat insulating layers, and that composition Ln2BaCuO5 is added with 20 mol % of LnBa2Cu3O7−δ. This allows a sintering behavior of the heat insulating layers to come close to a sintering behavior of the sensing layer, and can thus prevent the occurrence of separation of the layers and cracks. The oxygen sensor element has a sandwich structure where the sensing layer is sandwiched between the heat insulating layers, thereby reducing the amount of heat dissipated from the sensing layer, and making it possible to achieve electric power saving.

公开(公告)号：US20240217061A1

公开(公告)日：2024-07-04

申请号：US18044862

申请日：2021-09-15

Applicant: National University Corporation Nagaoka University of Technology ,  Sanoh Industrial Co., Ltd.

Inventor： Hideo Aida ,  Natsuko Omiya

IPC: B24B49/12 ,  G01N23/2254

CPC classification number: B24B49/12 ,  G01N23/2254 ,  G01N2223/611

Abstract: Provided are a polishing state analysis prediction program, a storage, a cathodeluminescence device, and a polishing state analysis prediction method. The polishing state analysis prediction program to predict a future polishing state of a polishing-target substrate to be polished based on a cathodeluminescence image of the polishing-target substrate, the image being obtained by a cathodeluminescence method, the program, when executed by a computer, causing the computer to perform: calculating average light emission intensity data or average luminance data from the cathodeluminescence image of each predetermined time after start of polishing the substrate; and plotting the average light emission intensity data or the average luminance data, and deriving a formula representing a fitting curve resulted from the plotting by using a predetermined function.

公开(公告)号：US20230093066A1

公开(公告)日：2023-03-23

申请号：US17789278

申请日：2020-12-25

Applicant: NAGAOKA UNIVERSITY OF TECHNOLOGY ,  NISSAN CHEMICAL CORPORATION ,  UNIVERSITY OF HYOGO

Inventor： Tomoyuki SASAKI ,  Hiroshi ONO ,  Nobuhiro KAWATSUKI ,  Kohei GOTO ,  Kimiaki TSUTSUI

IPC: G02F1/1337 ,  G02F1/01

Abstract: The present invention provides a polarization-independent terahertz wave control element, and provides a method for manufacturing a polarization-independent terahertz wave control element. The present invention provides a terahertz wave control element comprising: (A) a first flat plate having (A1) a first substrate, (A2) a first electrode formed on the first substrate, and (A3) a first liquid crystal alignment film formed on the first electrode; (B) a second flat plate having (B1) a second substrate, (B2) a second electrode formed on the second substrate, and (B3) a second liquid crystal alignment film formed on the second electrode; and (C) a liquid crystal present in a space formed by disposing (A) the first flat plate and (B) the second flat plate parallel to each other with a predetermined distance therebetween so that the first and second liquid crystal alignment films face each other, wherein (D1) the terahertz wave control element has a first portion in which the liquid crystal is aligned in a first direction parallel to (A) the first flat plate and (B) the second flat plate, and a second portion in which the liquid crystal is aligned in a second direction orthogonal to the first direction and parallel to (A) the first flat plate and (B) the second flat plate when no voltage is applied, (D2) the first portion has a first width, the second portion has a second width, the first and second portions are disposed adjacent to each other and alternately disposed in a predetermined cycle, (D3) when voltage is applied, the liquid crystal in each of the first portion and the second portion is aligned in a direction orthogonal to (A) the first substrate and (B) the second substrate, and (E) a phase change in which a terahertz wave transmitted through the terahertz wave control element is independent of the state of polarization.

公开(公告)号：US11177757B2

公开(公告)日：2021-11-16

申请号：US16754755

申请日：2017-12-07

Applicant: Mitsubishi Electric Corporation ,  National University Corporation Nagaoka University of Technology

Inventor： Sota Sano ,  Akira Satake ,  Kiyoshi Ohishi ,  Yuki Yokokura ,  Tenjiro Hiwatari

IPC: H02P27/06 ,  H02P21/22 ,  H02M7/5387

Abstract: The present invention includes a control amount calculation unit which calculates two or more control amounts each indicating a driving condition of a rotary electric machine on the basis of output current from and a switching state in a power converter; a limitation range-provided command value generation unit which generates limitation range-provided command values relative to command values for the control amounts; and a switching state determination unit which determines a switching state such that each control amount falls within the limitation range of the corresponding limitation range-provided command value. For at least one of the limitation range-provided command values, the limitation range thereof is temporally changed on the basis of the driving condition of the rotary electric machine.

公开(公告)号：US20210203261A1

公开(公告)日：2021-07-01

申请号：US16754755

申请日：2017-12-07

Applicant: Mitsubishi Electric Corporation ,  National University Corporation Nagaoka University of Technology

Inventor： Sota SANO ,  Akira SATAKE ,  Kiyoshi OHISHI ,  Yuki YOKOKURA ,  Tenjiro HIWATARI

IPC: H02P27/06 ,  H02P21/22 ,  H02M7/5387

Abstract: The present invention includes a control amount calculation unit which calculates two or more control amounts each indicating a driving condition of a rotary electric machine on the basis of output current from and a switching state in a power converter; a limitation range-provided command value generation unit which generates limitation range-provided command values relative to command values for the control amounts; and a switching state determination unit which determines a switching state such that each control amount falls within the limitation range of the corresponding limitation range-provided command value. For at least one of the limitation range-provided command values, the limitation range thereof is temporally changed on the basis of the driving condition of the rotary electric machine.

公开(公告)号：US20200295674A1

公开(公告)日：2020-09-17

申请号：US16650059

申请日：2018-09-20

Applicant: Mitsubishi Electric Corporation ,  National University Corporation Nagaoka University of Technology

Inventor： Yu KAWAI ,  Tatsuya OKUDA ,  Jun-ichi ITOH ,  Hoai Nam LE

IPC: H02M7/5387 ,  H02M1/08

Abstract: A power conversion device which reduces switching losses and stabilizes the output power. A switching-mode changer generates a reference signal for switching a mode of operation of the full-bridge circuit to a first switching mode or a second switching mode. In the first switching mode, an upper arm and a lower arm are switched synchronously, and a lower arm and an upper arm are non-conducting. In the second switching mode, the lower arm and the upper arm are switched synchronously, and the upper arm and the lower arm are non-conducting. The switching-mode changer adjusts the phase of the reference signal so that the reactive power is reduced.

公开(公告)号：US10374229B2

公开(公告)日：2019-08-06

申请号：US15553359

申请日：2016-02-17

Applicant: NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY ,  NIPPON ELECTRIC GLASS CO., LTD.

Inventor： Tsuyoshi Honma ,  Takayuki Komatsu ,  Satoshi Nakata ,  Hideo Yamauchi ,  Fumio Sato

IPC: H01M4/38 ,  H01M4/131 ,  H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02 ,  H01M10/0525 ,  H01M10/48

Abstract: A positive electrode active material for alkali-ion secondary batteries is provided which contains 20-55% of Na2O+Li2O, 10-60% of CrO+FeO+MnO+CoO+NiO, and 20-55% of P2O5+SiO2+B2O3 in terms of oxide-equivalent mol % and includes 50 mass % or more of an amorphous phase. According to the present invention, it is possible to provide a positive electrode active material for alkali-ion secondary batteries that enables high energy density and is excellent in the charge and discharge characteristics.

公开(公告)号：US20190149044A1

公开(公告)日：2019-05-16

申请号：US16133650

申请日：2018-09-17

Applicant: OMRON Corporation ,  NAGAOKA University of Technology

Inventor： Junichi ITOH ,  Katsutaka TANABE ,  Akihiro FUNAMOTO ,  Koji ANDO

IPC: H02M3/158 ,  H02M7/44 ,  H02M1/088

CPC classification number: H02M3/073 ,  H02M1/088 ,  H02M3/07 ,  H02M3/158 ,  H02M7/44 ,  H02M2001/0009 ,  H02M2001/0048

Abstract: A switching element with a small current capacity is provided to be able to be used in a DC-DC converter. The DC-DC converter includes a switching circuit in which a first switching element, a second switching element, a third switching element, and a fourth switching element are connected in series, a flying capacitor that is connected between a connection portion between the first switching element and the second switching element and a connection portion between the third switching element and the fourth switching element, a reactor that is connected between a connection portion between the second switching element and the third switching element and a positive electrode of an input unit, and a control circuit that turns on/off the switching element, in which the control circuit turns on/off the switching elements so that a peak value in a reactor current becomes equal to or smaller than a predetermined value.

公开(公告)号：US10042343B2

公开(公告)日：2018-08-07

申请号：US14842407

申请日：2015-09-01

Applicant: NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY ,  NABTESCO CORPORATION

Inventor： Kiyoshi Ohishi ,  Yuki Yokokura ,  Yosei Hirano ,  Koji Nakamura ,  Masataka Sato

IPC: G05D13/62 ,  G05B19/04

Abstract: This application discloses a control device for controlling a motor configured to drive an oscillatory cyclo-speed reducer including an oscillatory gear portion formed with at least one hole at an eccentric position. The control device includes an angle acquirer for acquiring input information about an input rotational angle indicating a rotational angle of the motor, an estimator for estimating an angular error between the input rotational angle and an output rotational angle indicating a rotational angle of the oscillatory cyclo-speed reducer based on a quantity of the hole(s) and a corrector for determining a compensation current value in correspondence to the angular error and setting a magnitude of a current to be supplied to the motor by correcting a command current value using the compensation current value.

公开(公告)号：US20170173716A1

公开(公告)日：2017-06-22

申请号：US15129490

申请日：2015-03-27

Applicant: IDEMITSU KOSAN CO., LTD. ,  Nagaoka University of Technology

Inventor： Tomohiko KITAMURA ,  YASUSHI FUKUZAWA ,  Ken YAMASHITA ,  Daiki HANAOKA

IPC: B23H1/08 ,  C10M119/02 ,  C10M169/06 ,  C10M129/40

CPC classification number: B23H1/08 ,  C10M119/02 ,  C10M129/26 ,  C10M129/32 ,  C10M129/40 ,  C10M169/06 ,  C10M171/00 ,  C10M2203/022 ,  C10M2203/024 ,  C10M2203/1025 ,  C10M2205/026 ,  C10M2205/0285 ,  C10M2207/12 ,  C10M2207/122 ,  C10M2207/126 ,  C10M2219/044 ,  C10N2210/01 ,  C10N2210/02 ,  C10N2240/201 ,  C10N2240/401

Abstract: An electrical discharge machining oil composition of the invention includes an organic acid metal salt and a base oil, in which the organic acid metal salt is an organic acid salt of a metal having an electronegativity on Pauling scale of 2 or less, and the present composition has a volume resistivity at 80 degrees C. of 2×10−5 TΩ·m or more and a kinematic viscosity at 40 degrees C. in a range from 0.5 mm2/s to 10 mm2/s.