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1. 发明专利

JPH10214713A SUPERCONDUCTING COIL 失效
公开(公告)号：JPH10214713A
公开(公告)日：1998-08-11
申请号：JP1548397
申请日：1997-01-29
申请人： FUJI ELECTRIC CO LTD
发明人： TAKITA KIYOSHI
IPC分类号： H01F6/06
摘要： PROBLEM TO BE SOLVED: To effectively support an electro-magnetic force and secure thermal stability even with a large coil in which an electro-magnetic force applied to a winding is increased, by alternately winding a high-temperature superconductive wire and a composite material having a ceramic layer on the outer circumference of a parallel connection body of stainless steel and copper or the like. SOLUTION: A superconducting coil has a structure forming a pancake coil in which a high-temperature superconductive wire 2 and a composite material 3 are alternately arranged by superimposing and simultaneously winding the high-temperature superconductive wire 2 and the composite material 3 in a groove provided on a spool 1. The high-temperature superconductive wire 2 is a silver sheath tape wire formed in the shape of thin tape by burying a high-temperature superconductor 21 in a silver sheath 22. The composite material 3 is made by forming a ceramic layer 33 made of alumina on the outer circumference of a metal composite material having a stainless steel 32 inside, which is a high-strength material, and a copper 31 outside, which is a high thermal conductive material. With this superconducting coil, an electro-magnetic force applied thereto is appropriately supported and excellent thermal stability is provided.

2. 发明专利

JPH10116725A SUPERCONDUCTING MAGNET DEVICE 失效
公开(公告)号：JPH10116725A
公开(公告)日：1998-05-06
申请号：JP21616497
申请日：1997-08-11
申请人： FUJI ELECTRIC CO LTD
发明人： BONO TAKAAKI , TOMIOKA AKIRA , SAKAKI KIYOSHI , TAKITA KIYOSHI
IPC分类号： H01F6/04
摘要： PROBLEM TO BE SOLVED: To make it possible to remove heat generated due to an AC loss effectively even when an exiting operation and a degaussing operation are performed at high speed and to operate this device stably without generating a normal conducting transition. SOLUTION: In a device, a superconducting coil is formed in such a way that a superconducting wire 10 is wound on a cooling bobbin 5 to be layerlike, that its side faces are supported by a cooling flange 4A and a cooling flange 4B and that a cooling plate 6 is arranged on the outer circumference. The device is cooled to a cryogenic temperature so as to be used by using an attached refrigerating machine while the cooling flange 4A, the cooling bobbin 5, the cooling plate 6 and the cooling flange 4B are cooled by superconduction. In this case, a superconducting cooling plate 11 which is composed of a copper alloy as a good heat-conducting material is inserted between layers of the wound superconducting wire 10, and both ends of them are inserted into grooves formed on the cooling flanges 4A, 4B so as to be bonded thermally.

3. 发明专利

JPH0950911A CURRENT LEAD FOR AC SUPERCONDUCTING DEVICE 失效
公开(公告)号：JPH0950911A
公开(公告)日：1997-02-18
申请号：JP20013195
申请日：1995-08-07
申请人： TAKEO MASAKATSU , FUNAKI KAZUO , IWAKUMA NARITAKA , FUJI ELECTRIC CO LTD
发明人： TAKEO MASAKATSU , FUNAKI KAZUO , IWAKUMA NARITAKA , TAKITA KIYOSHI , YASUKAWA YUKIO , ITO IKUO , KAMIIDE TOSHIO , HIGAMI HISAAKI
IPC分类号： H01L39/00 , H01F6/00 , H01F6/06 , H01L39/04 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To suppress the lowering of current-carrying capacity due to the generation of the differences of a current between a plurality of oxide superconducting conductors constituting low-temperature side leads to make it feasible to safely use them and further to prevent the increase of heat entry due to an AC magnetic field. SOLUTION: In a current lead which makes an AC current from an AC power source 18 flow into a superconducting coil 1 placed in a vacuum insulation container 14 and immersed in liquid helium 11, comprises a high-temperature side lead 6 and a low-temperature side lead 7 with a plurality of built-in oxide superconducting conductors, and is cooled by supplying liquid nitrogen to the lower end of the high-temperature side lead 6 from a lead cooling medium supply tube 19, an AC magnetic field shield 20 comprising cylindrical and electrically good conductive metal is provided in the periphery of the low-temperature side lead 7 to uniformize an AC magnetic field applied to the plurality of oxide superconducting conductors and further to reduce it.

4. 发明专利

JPH08339915A CURRENT LEAD FOR SUPERCONDUCTING DEVICE 失效
公开(公告)号：JPH08339915A
公开(公告)日：1996-12-24
申请号：JP14299895
申请日：1995-06-09
申请人： FUJI ELECTRIC CO LTD
发明人： TATSUKAWA MASAHIRO , TAKITA KIYOSHI , SAKAKI KIYOSHI , YASUKAWA YUKIO
IPC分类号： H01L39/04 , H01F6/00
摘要： PURPOSE: To prevent breakdown caused by thermal stress and to use the lead safely for a long period in the current lead using an oxide superconductor for the lead on the side of low temperature. CONSTITUTION: In the lead on the side of a low temperature, wherein a low- temperature side conductor 13A made of an oxide superconductor is contained an outer tube 14, and coated by flows of low-temperature helium gas, a plurality of slits 18 and 19 extending in the longitudinal direction are provided at both end parts of the cylindrical low-temperature side conductor 13A and inserted into the recess parts of an intermediate connecting body 15A comprising an excellent conducting metal connected to a high-temperature side conductor 11 and a low-temperature terminal 14A comprising also the excellent conducting metal and connected.

5. 发明专利

JPH06231952A CURRENT LEAD OF SUPERCONDUCTING MAGNET DEVICE 失效
公开(公告)号：JPH06231952A
公开(公告)日：1994-08-19
申请号：JP1911793
申请日：1993-02-08
申请人： FUJI ELECTRIC CO LTD
发明人： TAKITA KIYOSHI , NOSE SHINICHI
IPC分类号： H01B12/02 , H01F6/00 , H01F6/02 , H01F6/04 , H01F7/22
摘要： PURPOSE:To acquire a current lead wherein penetration heat to a low temperature side is little and a current can be supplied to a superconductive coil by preventing an oxide superconductor of a low temperature side lead from being damaged even if quench is generated in the oxide superconductor. CONSTITUTION:The lead is comprised of a series connector of a high temperature side lead 4 consisting of a good conductive metal and a low temperature side lead 45 consisting of an oxide superconductor. It is contained in a tubular container and is cooled by refrigerant gas of a low temperature, and is provided with a by-pass circuit parallel to a low temperature side lead which becomes conductive by detecting an abnormal voltage of the low temperature side lead generated by quench of the oxide superconductor. A by-pass circuit 41 is comprised of a switching element 42 which turns on upon detection of an abnormal voltage of a low temperature side lead and an oxide superconductive connection conductor 43 which connects the switching element to an oxide superconductor 47 of the low temperature side lead in parallel, and is contained in a parallel branch tube 44.

6. 发明专利

JPH05114754A CURRENT LEAD INSULATING SUPPORT STRUCTURE OF SUPERCONDUCTIVE EQUIPMENT 失效
公开(公告)号：JPH05114754A
公开(公告)日：1993-05-07
申请号：JP27436591
申请日：1991-10-23
申请人： FUJI ELECTRIC CO LTD
发明人： ITO IKUO , TAKITA KIYOSHI
IPC分类号： H01L39/04
摘要： PURPOSE:To prevent troubles such as breakage of a bellows and a ceramic tube by a method wherein reinforcements whose upper lower end are linked to an upper flange provided to the normal-temperature terminal of a current lead and a lower flange connected to a vacuum heat insulating chamber respectively are provided. CONSTITUTION:The upper and the lower end of a reinforcing member 20 are linked and fixed to an upper flange 5 provided to the normal-temperature terminal 1A of a current lead 1 and a lower flange 6 connected to a vacuum heat insulating chamber 2 respectively. The reinforcing member 20 is arranged in a dry coolant gas atmosphere shut off from the outside air, and a cylindrical insulator (FRP tube) 21 can be protected against contaminants. By this setup, a normal-temperature port 7 can be mechanically reinforced without deteriorating a ceramic tube 3 in voltage-resistant properties, a current lead 1 can be prevented from swinging due to an external force, and troubles such as the deformation of a bellows 4 or breakage of the ceramic tube 3 can be prevented.

7. 发明专利

JPH04350979A LEAD WIRE FOR MEASUREMENT OF CRYOSTAT 失效
公开(公告)号：JPH04350979A
公开(公告)日：1992-12-04
申请号：JP12411791
申请日：1991-05-29
申请人： FUJI ELECTRIC CO LTD
发明人： TAKITA KIYOSHI
IPC分类号： H01L39/06
摘要： PURPOSE:To achieve that creeping heat conducted to the inside of a low- temperature container for a cryostat from the outside by using a lead wire for measurement use as a heat-conducting medium is restrained to be a little. CONSTITUTION:For a low-temperature container, for a cryostat, which is composed of a combination of a helium container 2 housing a superconducting magnet 1, radiant shields 4, 5 and a vacuum container 6, an oxide superconducting conductor is adopted as a lead wire, for measurement use, which has been wired between various kinds of measuring sensors such as a thermometer 10, a liquid-level indicator 11 and the like which are arranged inside the container through a service port 8 of the low-temperature container. Halfway parts in the lead wire are coupled to the radiant shields for the low- temperature container via heat-conducting members 17 so as to conduct heat.

8. 发明专利

JPH04130605A CURRENT LEAD OF SUPERCONDUCTING ELECTROMAGNET DEVICE 失效
公开(公告)号：JPH04130605A
公开(公告)日：1992-05-01
申请号：JP25097290
申请日：1990-09-20
申请人： FUJI ELECTRIC CO LTD
发明人： TAKITA KIYOSHI
IPC分类号： H01F6/00 , H01L39/06
摘要： PURPOSE:To stabilize a current lead mechanically, thermally and magnetically and to lessen the vaporization loss of liquid helium by a method wherein superconducting conductors are formed of an oxide superconductor covered with a metal of a good conductivity as their main conductor, are jointed to the interiors of recessed grooves in a heat stabilizing material consisting of a material of a good conductivity, are supported by the grooves and the current lead is held by a reinforcing material of a low heat conductivity. CONSTITUTION:Superconducting conductors 11 respectively consist of an oxide superconductor 11A covered with a metal cover 11B of a good conductive metal, are housed in recessed grooves 12A formed in a heat stabilizing material 12 and are jointed to the interiors of the grooves. A path 14 for helium gas IG is held by the recessed grooves formed in the material 12 between a reinforcing material 13 and the material 12 and a unit conductor part 10 is constituted. The conductor part 10 is housed in an outer cylinder 15 consisting of a low-heat conductivity and low-conductivity metal material and a current lead 20 is formed. The lead 20 constituted in such a way is installed on an electromagnet device and in the case and excitation current is fed to a superconducting coil, the current lead is cooled with the low-temperature helium gas IG to pass through the path 14 and a superconducting state is held in the conductors 11A.

9. 发明专利

JPS6225473A CURRENT LEAD FOR SUPPLYING CURRENT TO SUPERCONDUCTIVE DEVICE 失效
公开(公告)号：JPS6225473A
公开(公告)日：1987-02-03
申请号：JP16450385
申请日：1985-07-25
申请人： FUJI ELECTRIC CO LTD
发明人： ITO IKUO , ISHIHARA AKIRA , SHINDO YOSHIHIKO , TAKITA KIYOSHI
IPC分类号： H01F6/00 , H01L39/02 , H01L39/04
摘要： PURPOSE:To obtain a current lead which has preferable cooling characteristics by cutting linear slits in combination with a spiral step on the peripheral surface of a lead conductor material, and connecting slits in series therebetween to form a spiral groove and a heat sink fin. CONSTITUTION:A lead conductor 8 of round rod is indexed to n sections (indexed at 90 deg. in case of n=4). When the pitch of a heat sink fin 11 is p, the position is displaced by x=p/n axially between adjacent sections and linear slits 10a are cut so that the groove width (a) become p>a>x, the slits 10a are connected in series to form a spiral groove 10. The depth (b) is the size for crossing part of the adjacent slit at the end of the slit except the prescribed energizing section at the center of a thin unit 8. Since the slit is linear, it can be formed to be narrow and deep by a milling machine to obtain a large heat sink area, cooling gas becomes disturbulent in a step between the slits 10 to further increase a thermal exchangeability.

10. 发明专利

JPS6130087A Superconducting electromagnet device 失效
标题翻译：超导电子设备
公开(公告)号：JPS6130087A
公开(公告)日：1986-02-12
申请号：JP15181084
申请日：1984-07-20
申请人： Fuji Electric Co Ltd , Fuji Electric Corp Res & Dev Ltd
发明人： ISHIHARA AKIRA , TAKITA KIYOSHI
IPC分类号： H01F6/00 , H01L39/04
CPC分类号： H01L39/04
摘要： PURPOSE:To prevent a low-temperature gas from flowing out of a heat insulating vessel and atmospheric moisture from entering the vessel when a current lead is loaded into or unloaded from the vessel, by providing a partition wall between the upper and lowr spaces in the vessel, and further providing a valve mechanism which opens and closes a current lead receiving through-hole when the current lead is fitted into and removed from the through-hole, respectively. CONSTITUTION:A partition wall 9 having a through-hole 9b capable of receiving or receiving a current lead 1 is provided in the center inside a heat insulating vessel. A valve mechanism 20 is disposed on the lower side of the partition wall 9. When the lead 1 is removed, the valve mechanism 20 acts in such a manner that a connecting blobk 7 is pressed by the force from a compression spring 12 which acts on a base 18 as a support which is suspended from the partition wall 9, and the block 17 is thereby pressed against the partition wall 9 to close the through-hole 9b while hermetically sealing it by a packing 14. Thus, there is no fear of He gas H1 in the lower space 16 leaking out to the upper space. When the lead 1 is fitted into the through-hole 9b, the block 17 is presses downward by the distal end 1c of the lead 1 pushed into the through-hole 9b, and the spring 12 is thereby compressed, thus bringing the mechanism 20 into an open condition. In consequence, the gas H1 is led in the direction of the arrows to cool the lead 1.
摘要翻译：目的：为了防止低温气体从绝热容器流出，大气中的水分不会进入容器，当电流引线从容器装入或卸载时，通过在上部和下部空间之间设置分隔壁并且进一步提供一种阀机构，当电流引线分别装配到通孔中并从通孔中移除时，该机构分别打开和关闭电流引线接收通孔。构成：具有能够接收或接收电流引线1的通孔9b的隔壁9设置在绝热容器内的中心。阀机构20设置在分隔壁9的下侧。当引线1被移除时，阀机构20以这样的方式起作用，即连接弹簧7被来自压缩弹簧12的作用力作为从分隔壁9悬挂的支撑体的基部18，并且块17因此被压靠在分隔壁9上，以封闭通孔9b，同时用密封件14密封。因此，不必担心他在下部空间16中的气体H1泄漏到上部空间。当导线1装配到通孔9b中时，块17被推入通孔9b中的引线1的远端1c向下按压，弹簧12被压缩，从而使机构20进入一个开放的条件。因此，气体H1沿箭头的方向被引导以冷却引线1。

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