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公开(公告)号：US20160308110A1
公开(公告)日：2016-10-20
申请号：US15100702
申请日：2013-12-20
Applicant: HITACHI, LTD.
Inventor： Hideki TANAKA , Tsuyoshi WAKUDA
CPC classification number: H01L39/10 , G01R33/3815 , H01F6/008 , H01L39/02 , H01L39/20 , H02H1/0007 , H02H7/001
Abstract: An object of the present invention is to provide a persistent current switch with high heating efficiency by simplifying the configuration of the persistent current switch and reducing the heat capacity. To achieve the object, a superconducting magnet in accordance with the present invention includes a superconducting coil, a persistent current switch, and one of an alternating-current power supply, a pulsed power supply, or a charge/discharge circuit. The one of the alternating-current power supply, the pulsed power supply, or the charge/discharge circuit is connected to a loop circuit of the superconducting coil and the persistent current switch such that it is in parallel with the persistent current switch.
Abstract translation: 本发明的目的是通过简化持久电流开关的结构并降低热容量来提供具有高加热效率的持久电流开关。 为了实现该目的，根据本发明的超导磁体包括超导线圈，持续电流开关以及交流电源，脉冲电源或充电/放电电路之一。 交流电源，脉冲电源或充电/放电电路中的一个连接到超导线圈和持续电流开关的环路电路，使其与持续电流开关并联。
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Patent Agency Ranking
公开(公告)号：US20240155951A1
公开(公告)日：2024-05-09
申请号：US18281342
申请日：2022-08-01
Applicant: HITACHI, LTD.
Inventor： Tsuyoshi WAKUDA
IPC: H10N60/84 , G01R33/38 , G01R33/3815 , H01F6/02 , H02H7/00
CPC classification number: H10N60/84 , G01R33/3804 , G01R33/3815 , H02H7/001 , H01F6/02
Abstract: There is provided a superconducting magnet device including: a superconducting coil (main coil) in which a superconducting wire material is wound; and a persistent current switch (PCS) electrically connected in parallel with the superconducting coil with respect to an excitation power supply for the superconducting coil, in which the excitation power supply is electrically connected to the superconducting coil and the persistent current switch via a current lead, the persistent current switch is provided with a PCS heater and a PCS heater power supply for transitioning from a super-conduction state to a normal conduction state, and a current supplied to the PCS heater winding from the PCS heater power supply flows to the heater via at least a part of the current lead.
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3.发明公开公开(公告)号：US20240125521A1
公开(公告)日：2024-04-18
申请号：US18277106
申请日：2021-12-28
Applicant: Hitachi, Ltd.
Inventor： Tsuyoshi WAKUDA
CPC classification number: F25B21/00 , H01F6/04 , F25B2321/0022
Abstract: A rotating magnetic field generation device of the present invention includes: a magnetic field generating unit including disks in which a plurality of magnets are arranged circumferentially, a magnetic field working space formed by stacking the disks at intervals to make the plurality of magnets face each other, and a shaft to which the stacked disks are fixed, the shaft being installed at a central axis of the disks; an adiabatic vacuum vessel in which the magnetic field generating unit is installed; and a drive mechanism that is installed in a room temperature region and rotates the shaft.
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公开(公告)号：US20210272722A1
公开(公告)日：2021-09-02
申请号：US17186223
申请日：2021-02-26
Applicant: HITACHI, LTD.
Inventor： Shinji FUJITA , Tsuyoshi WAKUDA , Yota ICHIKI , Motomune KODAMA
Abstract: A superconducting wire connector includes superconducting wires and a sintered body containing MgB2. The superconducting wires are connected by the sintered body. At least one of the superconducting wires includes a superconducting core having a first outer surface. The sintered body is in contact with the first outer surface. A method of connecting superconducting wires by a sintered body containing MgB2 includes exposing a superconducting core of at least one of the superconducting wires by removing a portion, positioned in the middle in a longitudinal direction of the at least one of the superconducting wires, of a metal sheath disposed around the superconducting core, disposing the at least one of the superconducting wires through a container, filling the container with a raw material of MgB2, and forming the sintered body being in contact with an outer surface of the superconducting core by sintering the raw material filled in the container.
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5.发明公开公开(公告)号：US20230317318A1
公开(公告)日：2023-10-05
申请号：US18022328
申请日：2021-08-06
Applicant: HITACHI, LTD.
Inventor： Shinji FUJITA , Yota ICHIKI , Motomune KODAMA , Tsuyoshi WAKUDA
Abstract: In the connection portion for a superconducting wire, a plurality of superconducting wires are integrated by a sintered body containing MgB2, end portions of the superconducting wires each having an outer peripheral surface of a superconducting filament exposed are inserted into a container in parallel. The container has an opening having a diameter larger than a wire diameter of the superconducting wires on at least one side in a longitudinal direction of the superconducting wires, and the sintered body is in contact with the outer peripheral surfaces of the superconducting filaments. The method for connecting a superconducting wire includes: exposing the outer peripheral surfaces of the superconducting filaments; inserting the superconducting wires into the container; filling the container with a raw material; and heat-treating the raw material to generate the sintered body. The raw material is pressurized in parallel to the longitudinal direction of the superconducting wires and then heat-treated.
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公开(公告)号：US20180012682A1
公开(公告)日：2018-01-11
申请号：US15544678
申请日：2016-02-03
Applicant: Hitachi Ltd.
Inventor： Yota ICHIKI , Tsuyoshi WAKUDA
CPC classification number: H01B12/02 , H01L39/02 , H01L39/141 , H01R4/28 , H01R4/68
Abstract: The problem is to attain a joint for multi-core superconducting wires having a high critical current property. The joint for superconducting wires of the present invention has a first sintered body containing MgB2 configured to fix a plurality of superconducting wires, and a second sintered body containing MgB2 configured to joint the superconducting wires.
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