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1.发明授权公开(公告)号：US12244117B2
公开(公告)日：2025-03-04
申请号：US17397375
申请日：2021-08-09
Inventor： Weihua Jiang , Hiroshi Umeda
IPC: H01S3/097 , H01S3/038 , H01S3/0975
Abstract: A high-voltage pulse generation device configured to apply a pulsed high voltage to the space between a pair of discharge electrodes disposed in a laser chamber of a gas laser apparatus includes n transformer cores that form a transformer, where n is a natural number greater than or equal to two, n primary electric circuits of the transformer, the n primary electric circuits each having a first terminal connected to a reference potential and a second terminal connected to a charger, the n primary electric circuits each including one or more primary coils, one or more diodes connected in parallel to the one or more primary coils, and one or more pulse generators connected in parallel to the one or more primary coils, and a secondary electric circuit of the transformer, the secondary electric circuit including a secondary coil and connected to the pair of discharge electrodes.
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公开(公告)号：US20240413759A1
公开(公告)日：2024-12-12
申请号：US18700721
申请日：2021-11-09
Applicant: Mitsubishi Electric Corporation , National University Corporation Nagaoka University of Technology
Inventor： Yu KAWAI , Kikuo IZUMI , Junichi ITOH , Hiroki WATANABE
Abstract: In a DAB circuit including a first bridge and a second bridge, a boost circuit is shared by connecting reactors between a storage battery and the first bridge. In each leg of the first bridge, in order to increase an absolute value of a reactor current, an ON period of one switching element of a switching element on a high voltage side and a switching element on a low voltage side is provided, and then, an ON period of the other switching element is provided. An ON period length of the one switching element is set according to a control command value of a DC voltage input to the first bridge. An ON period length of the other switching element is set to a time length until an absolute value of the reactor current that has increased during the ON period of the one switching element returns to zero.
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公开(公告)号：US12166329B2
公开(公告)日：2024-12-10
申请号：US17396928
申请日：2021-08-09
Inventor： Weihua Jiang , Hiroshi Umeda , Koji Kakizaki
IPC: H01S3/13 , H01S3/091 , H01S3/097 , H01S3/0971 , H01S3/0973 , H01S3/0975 , H01S3/131 , G03F7/00 , G03F7/20 , H01F27/24 , H01F27/28 , H01S3/225
Abstract: A high voltage pulse generation device includes n transformer cores configuring a transformer, n being a natural number of 2 or more, each of the n transformer cores being configured to form a magnetic circuit along a first plane and to have a width in a first direction parallel to the first plane larger than a width in a second direction parallel to the first plane and perpendicular to the first direction; n primary electric circuits of the transformer connected in parallel to each other, each of the n primary electric circuits including at least one primary coil, and m pulse generation units connected in parallel to the at least one primary coil, m being a natural number equal to or more than 2; and a secondary electric circuit of the transformer including a secondary coil and connected to a pair of discharge electrodes.
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公开(公告)号：US12055742B2
公开(公告)日：2024-08-06
申请号：US17014620
申请日：2020-09-08
Inventor： Takeya Sakai , Moritsugu Sakamoto , Hiroshi Ono , Nobuhiro Kawatsuki
CPC classification number: G02B5/32 , C09K19/3852 , G01J4/00 , G02B27/0927 , G03H1/0256 , G03H1/28 , G03H2001/0264 , G03H2240/15 , G03H2250/38 , G03H2260/12
Abstract: A polarization diffraction element comprising including a film including a liquid crystalline material having photosensitivity, the film having at least one hologram recorded therein, and thereby having a property as a fork-shaped polarization grating having an anisotropic structure in which an optical axis continuously rotates toward a direction of a grating vector.
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公开(公告)号：US20230402942A1
公开(公告)日：2023-12-14
申请号：US18033586
申请日：2021-11-18
Applicant: Mitsubishi Electric Corporation , National University Corporation Nagaoka University of Technology
Inventor： Tenjiro HIWATARI , Sota SANO , Akira SATAKE , Kiyoshi OHISHI , Yuki YOKOKURA , Yuto KOBAYASHI
IPC: H02M7/5395 , H02P27/08 , H02M1/00
CPC classification number: H02M7/5395 , H02P27/08 , H02M1/0058
Abstract: A power conversion device comprises: power conversion circuitry for converting DC power into AC power and supplying it into a load according to a switching state quantity defined by combinations among switching parameters of switching devices; a voltage output calculation device for calculating a voltage output value on the power conversion circuitry, based on the switching state quantity; an integration value calculation device for acquiring a voltage reference integration value and a voltage output integration value by integrating a voltage reference value and the calculated voltage output value; a switching update-determination unit for outputting an update signal of the switching state quantity, based on the voltage reference integration value, its allowance value, and the voltage output integration value; and a switching determination table for determining a switching state quantity of the switching devices, based on the voltage reference integration value, the voltage output integration value and the update signal.
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Patent Agency Ranking
公开(公告)号：US20230175165A1
公开(公告)日：2023-06-08
申请号：US17911537
申请日：2021-03-16
Applicant: OHARA INC. , NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY , NATIONAL INSTITUTE OF TECHNOLOGY
Inventor： Sunao CHATANI , Masahiko INUI , Motohiro TAGAYA , Takuya Kataoka , Satoshi MOTOZUKA
Abstract: The present invention provides a crystal of a europium compound containing europium. The present invention enables the preparation of a crystal of a europium compound having a powder X-ray diffraction pattern having a first diffraction peak in diffraction angle (2θ) range of 34.3° to 36.1° in which a half width of the first diffraction peak is 1.8° or less, and/or having a second diffraction peak in diffraction angle (2θ) range of 28.6° to 29.6° and a third diffraction peak in diffraction angle (2θ) range of 36.8° to 38.4° in which a half width of the second diffraction peak is 1.0° or less and a half width of the third diffraction peak is 1.6° or less, and
being at least one compound selected from compounds represented by formulae (1) to (4):
EuClx (1)
Eu(OH)2 (2)
Eu(OH)2Cl (3)
EuOCl (4)
x is 0.05 or more and 5 or less.-
公开(公告)号：US11286449B2
公开(公告)日：2022-03-29
申请号：US16302828
申请日：2017-05-18
Applicant: Ohara Quartz CO., LTD. , NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY , National Institute of Technology
Inventor： Masahiko Inui , Sunao Chatani , Motohiro Tagaya , Satoshi Motozuka
Abstract: The purpose of the present invention is to provide a cell culture substratum which has excellent resistance to liquid culture media and low cytotoxicity, can achieve a high cell adhesion ratio and a high viability of cultured cells, has excellent thermal stability, and is less likely to absorbs ultraviolet ray. A cell culture substratum which is provided with a substrate made from an inorganic material and has multiple concavo-convex structures on a culturing surface thereof, wherein, when the concavo-convex structures are measured with an atomic force microscope in accordance with JISB0601 and JISR1683 (measured area: a 1 μm-square, cut-off value of a low-pass contour curve filter: 1 nm, cut-off value of a high-pass contour curve filter: 170 nm), the average of the lengths of contour curve elements of the concavo-convex structures is 1 to 170 nm as measured in at least one direction (when a curve showing long-wavelength components that are blocked by the high-pass contour curve filter is converted to a straight line by the least square method, the average line is a line that is parallel with the straight line and indicates a height cumulative relative frequency distribution in the contour curve of 50%).
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8.发明申请公开(公告)号：US20210367394A1
公开(公告)日：2021-11-25
申请号：US17397375
申请日：2021-08-09
Inventor： Weihua JIANG , Hiroshi UMEDA
IPC: H01S3/097 , H01S3/0975 , H01S3/038
Abstract: A high-voltage pulse generation device configured to apply a pulsed high voltage to the space between a pair of discharge electrodes disposed in a laser chamber of a gas laser apparatus includes n transformer cores that form a transformer, where n is a natural number greater than or equal to two, n primary electric circuits of the transformer, the n primary electric circuits each having a first terminal connected to a reference potential and a second terminal connected to a charger, the n primary electric circuits each including one or more primary coils, one or more diodes connected in parallel to the one or more primary coils, and one or more pulse generators connected in parallel to the one or more primary coils, and a secondary electric circuit of the transformer, the secondary electric circuit including a secondary coil and connected to the pair of discharge electrodes.
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公开(公告)号：US20210367393A1
公开(公告)日：2021-11-25
申请号：US17396928
申请日：2021-08-09
Inventor： Weihua JIANG , Hiroshi UMEDA , Koji KAKIZAKI
Abstract: A high voltage pulse generation device includes n transformer cores configuring a transformer, n being a natural number of 2 or more, each of the n transformer cores being configured to form a magnetic circuit along a first plane and to have a width in a first direction parallel to the first plane larger than a width in a second direction parallel to the first plane and perpendicular to the first direction; n primary electric circuits of the transformer connected in parallel to each other, each of the n primary electric circuits including at least one primary coil, and m pulse generation units connected in parallel to the at least one primary coil, m being a natural number equal to or more than 2; and a secondary electric circuit of the transformer including a secondary coil and connected to a pair of discharge electrodes.
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公开(公告)号：US10778116B2
公开(公告)日：2020-09-15
申请号：US16279179
申请日：2019-02-19
Applicant: National University Corporation Nagaoka University of Technology , FUJI ELECTRIC CO., LTD.
Inventor： Junichi Itoh , Koroku Nishizawa , Akio Toba , Akihiro Odaka
Abstract: A three-phase inverter includes three series circuits that are connected in parallel to a capacitor connected in parallel to a DC voltage source. Each of the three series circuits includes two semiconductor switching elements connected in series. A connection point between the two semiconductor switching elements is used as an AC output terminal for each phase. The three-phase inverter generates PWM pulses of three phases including a PWM pulse of one phase, whose pulse width of a positive side pulse in one switching cycle is the largest, and including PWM pulses of the other two phases such that a positional relationship between positive side pulses of the other two phases is a positional relationship in which an overlapping range on a time axis is smaller as compared with a state in which a positive side pulse of one phase encompasses a positive side pulse of the other pulse.
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