公开(公告)号：US4430536A

公开(公告)日：1984-02-07

申请号：US389969

申请日：1982-06-18

申请人： Yukio Kurosawa ,  Akira Wada ,  Kiyoji Iwashita ,  Hideaki Tsuda

发明人： Yukio Kurosawa ,  Akira Wada ,  Kiyoji Iwashita ,  Hideaki Tsuda

IPC分类号： H01H33/66 ,  H01H33/664

CPC分类号： H01H33/6644

摘要： A vacuum interrupter comprises a vacuum vessel, at least a pair of electrical conductor rods extending from interior to exterior of the vacuum vessel, and at least a pair of separable composite electrodes respectively connected to the tip of the electrical conductor rods. Each of the composite electrodes has a main electrode, a parallel magnetic field generator for generating a parallel magnetic field which acts on an arc created when one main electrode is separated from the other, and a magnetic field suppressor of high electrical conductivity embedded in a central portion of the main electrode for partly cancelling the parallel magnetic field. In the vacuum interrupter, when the parallel magnetic field permeates through the magnetic field suppressor, eddy current flow is caused therein. A magnetic field due to the eddy current has a polarity opposite to that of the parallel magentic field and partly cancels the parallel magnetic field. Intensity of the parallel magnetic field then becomes smaller at the central portion than that at the other peripheral portion, and the arc tends to shift from the magnetic field suppressor to the outer peripheral portion, thereby preventing fusion damage of the magnetic field suppressor.

摘要翻译： 真空断路器包括真空容器，至少一对从真空容器的内部延伸到外部的电导体棒，以及分别连接到电导体棒的尖端的至少一对可分离的复合电极。 每个复合电极具有主电极，平行磁场发生器，用于产生平行磁场，其作用于当一个主电极彼此分离时产生的电弧，以及嵌入中心的高导电性的磁场抑制器 用于部分地消除平行磁场的主电极部分。 在真空断路器中，当并联磁场渗透通过磁场抑制器时，在其中引起涡流。 由于涡流引起的磁场具有与平行磁场相反的极性，并且部分地抵消了平行磁场。 平行磁场的强度在中心部分的强度比其他周边部分的强度变小，电弧趋于从磁场抑制器向外周部分移动，从而防止磁场抑制器的熔断。

公开(公告)号：US4427857A

公开(公告)日：1984-01-24

申请号：US319985

申请日：1981-11-10

申请人： Nobuo Abe ,  Hiroyuki Sugawara ,  Yukio Kurosawa ,  Akira Wada ,  Kiyoji Iwashita

发明人： Nobuo Abe ,  Hiroyuki Sugawara ,  Yukio Kurosawa ,  Akira Wada ,  Kiyoji Iwashita

IPC分类号： H01H33/66 ,  H01H33/664

CPC分类号： H01H33/6644 ,  H01H33/6643

摘要： A vacuum interrupter of parallel magnetic field electrode type comprising a pair of separatable arc electrodes disposed within a vacuum vessel, with each being provided on its back side with a conductive rod extending outwardly of the vacuum vessel. Coil electrodes are electrically connected between the associated arc electrode and rod for applying parallel magnetic fields to arc, and slits are formed in the arc electrodes for suppressing eddy currents of the arc electrodes resulting from the parallel fields. A reinforcement member of an electric conductivity higher than a main surface portion of the arc electrode is provided on the back side of the arc electrode opposite to said main surface portion so that the resulting arc current flows uniformly through the reinforcement member so that a higher interruption efficiency can be obtained for the vacuum interrupter.

摘要翻译： 一种并联磁场电极型真空断路器，包括设置在真空容器内的一对可分离的电弧电极，每个在其后侧设置有一个向该真空容器向外延伸的导电棒。 线圈电极电连接在相关联的电弧电极和棒之间，用于将平行磁场施加到电弧上，并且在电弧电极中形成狭缝以抑制由平行场引起的电弧电极的涡流。 在电弧电极的与所述主表面部分相对的背面上设置有比电弧电极的主表面部分高的电导率的加强部件，使得所产生的电弧电流均匀地流过加强部件，使得较高的中断 可以获得真空断路器的效率。

公开(公告)号：US4546222A

公开(公告)日：1985-10-08

申请号：US584903

申请日：1984-02-29

申请人： Ryuji Watanabe ,  Akira Wada ,  Hisashi Ando ,  Seiki Shimizu ,  Yukio Kurosawa ,  Kiyoji Iwashita

发明人： Ryuji Watanabe ,  Akira Wada ,  Hisashi Ando ,  Seiki Shimizu ,  Yukio Kurosawa ,  Kiyoji Iwashita

IPC分类号： H01H33/66 ,  H01H1/02 ,  H01H33/664

CPC分类号： H01H33/6644 ,  H01H1/0203

摘要： Disclosed is a vacuum switch having a container and a pair of contact electrodes, and a method of manufacturing the same, in which at least one of the contact electrodes is constituted by a member made up of a skeleton containing cobalt as its principal component with pores into which a copper alloy containing copper as its principal component, silver, and a low melting point and high vapor pressure element having substantially no or very low solid-solubility with respect to the copper at a room temperature is impregnated.

摘要翻译： 公开了一种具有容器和一对接触电极的真空开关及其制造方法，其中至少一个接触电极由包含钴作为主要成分的骨架构成的构件构成，具有孔 浸渍含有铜作为其主要成分的铜合金，银，以及在室温下相对于铜基本上没有或非常低的固溶度的低熔点和高蒸气压元素。

公开(公告)号：US4704506A

公开(公告)日：1987-11-03

申请号：US881961

申请日：1986-07-03

申请人： Yukio Kurosawa ,  Kiyoji Iwashita ,  Morihisa Matumoto ,  Takanao Kurasawa ,  Syunkichi Endo

发明人： Yukio Kurosawa ,  Kiyoji Iwashita ,  Morihisa Matumoto ,  Takanao Kurasawa ,  Syunkichi Endo

IPC分类号： H01H33/66 ,  H01H33/664

CPC分类号： H01H33/6642

摘要： A cylindrical coil electrode incorporated in a vacuum interrupter comprises a cylindrical body having an opening at one end thereof, two electrical connections provided between the edge surface of the opening of the cylindrical body and a main electrode, two arcuate slits formed on the cylindrical body between the two electrical connections, two arcuate current paths formed in the cylindrical body by the arcuate slits beginning as a respective electrical connection and ending at a rod, and two current blocking slits formed on the cylindrical body at positions where one end of each of the current paths laps the other end of the other current paths. Because of the above structure, one-turn current flows throughout the current paths so that a uniform axial magnetic field can be applied to the main electrode, and an arc current can be uniformly distributed over the entire surface of the main electrode, thereby improving the current interruption performance of the vacuum interrupter.

摘要翻译： 结合在真空断路器中的圆筒形线圈电极包括在其一端具有开口的圆柱形主体，设置在圆柱体的开口的边缘表面和主电极之间的两个电连接，形成在圆柱体上的两个弧形狭缝 两个电连接，通过由相应的电连接开始并终止于杆的弓形狭缝形成在圆柱形主体中的两个弧形电流路径，以及形成在圆柱体上的两个电流阻塞狭缝，其中每个电流的一端 路径使其他当前路径的另一端相交。 由于上述结构，单向电流流过电流路径，从而可以对主电极施加均匀的轴向磁场，并且电弧电流可以均匀分布在主电极的整个表面上，从而改善 真空断路器的电流中断性能。

公开(公告)号：US4695689A

公开(公告)日：1987-09-22

申请号：US799484

申请日：1985-11-19

申请人： Yukio Kurosawa ,  Kiyoji Iwashita

发明人： Yukio Kurosawa ,  Kiyoji Iwashita

IPC分类号： H01H33/66 ,  H01H33/664

CPC分类号： H01H33/664 ,  H01H2033/6648 ,  H01H33/6642

摘要： A pair of separable disc shaped electrodes for a vacuum circuit breaker, each including an annular contact part formed around the outer circumferential portion of the electrode on the facing surface to the other electrode, a round recessed part formed on the inner portion thereof and surrounded by the annular contact part, an elastic support plate placed on the non-facing surface thereof and three straight grooves extending from the outer periphery of the annular contact part to the inner periphery thereof so that arcing on the round recessed part is prevented during a circuit breaking operation of the vacuum circuit breaker.

摘要翻译： 一种用于真空断路器的可分离盘状电极，每个包括形成在与其相对的电极的相对表面上的电极的外周部分周围的环形接触部分，形成在其内部的圆形凹部，并被 环形接触部分，放置在其不相对表面上的弹性支撑板和从环形接触部分的外周延伸到其内周边的三个直槽，使得在断路期间防止圆形凹部上的电弧 真空断路器的运行。

公开(公告)号：US5759646A

公开(公告)日：1998-06-02

申请号：US699148

申请日：1996-08-16

申请人： Shoji Kano ,  Nobuo Kawada ,  Ryoji Nakajima ,  Yukio Kurosawa

发明人： Shoji Kano ,  Nobuo Kawada ,  Ryoji Nakajima ,  Yukio Kurosawa

IPC分类号： C04B41/87 ,  C04B35/583 ,  C04B41/50 ,  C04B41/51 ,  C04B41/85 ,  C04B41/88 ,  C30B15/10 ,  C30B23/06 ,  C30B35/00 ,  H01L21/203 ,  B01L3/04

CPC分类号： C04B41/009 ,  C04B41/5001 ,  C04B41/5133 ,  C04B41/85 ,  C04B41/88 ,  C30B15/10 ,  C30B23/06 ,  C30B35/002 ,  Y10T428/131 ,  Y10T428/1317

摘要： Proposed is an improvement in a vessel, e.g., crucible, of pyrolytic boron nitride (PBN) used, for example, in the process of molecular beam epitaxy for melting silicon and the like at a high temperature. Different from conventional PBN crucibles used for such a process, in which contamination of high-purity silicon is unavoidable by the reaction of molten silicon with PBN or a thermal decomposition products of boron nitride, the inventive PBN vessel is provided on the surface with a protective coating layer of pyrolytic graphite or a refractory metal such as platinum so as not to cause troubles due to contamination of high-purity silicon melted therein with the crucible materials.

摘要翻译： 提出了在例如用于在高温下熔化硅等的分子束外延过程中使用的热解氮化硼（PBN）的容器（例如坩埚）的改进。 与用于这种工艺的常规PBN坩埚不同，其中高纯度硅的污染是熔融硅与PBN或氮化硼的热分解产物的反应所不可避免的，本发明的PBN容器在表面上提供有保护 热解石墨或难熔金属如铂的涂层，以免由于用坩埚材料熔化的高纯度硅的污染而引起麻烦。

公开(公告)号：US5502290A

公开(公告)日：1996-03-26

申请号：US483878

申请日：1995-06-07

申请人： Osamu Koyanagi ,  Kunio Hirasawa ,  Masanori Tsukushi ,  Yukio Kurosawa ,  Tadashi Sato ,  Youichi Ohshita

发明人： Osamu Koyanagi ,  Kunio Hirasawa ,  Masanori Tsukushi ,  Yukio Kurosawa ,  Tadashi Sato ,  Youichi Ohshita

IPC分类号： H01H33/34 ,  H01H33/56

CPC分类号： H01H33/34 ,  H01H33/563

摘要： A switching mechanism for use e.g. in a circuit breaker of an underground electric substation has a movable rod which causes opening and closing of an electrical contact and a hydraulic operating system. The hydraulic operating system uses a hydraulic fluid which has a high flammability temperature or is incombustible. Thus, even if such fluid leaks from the hydraulic operating system, the risk of fire or explosion is minimized. The hydraulic operating system may have a sealed tank for the fluid, preferably with a variable volume expansion chamber. In a further development, the hydraulic operating system and possibly parts of the movable rod, is enclosed in a casing which is sealed and is filled with a gas which does not support combustion therein. Thus, the risk of fire or explosion is further reduced. The casing may have a variable volume expansion chamber.

摘要翻译： 一种切换机制。 在地下电力变电站的断路器中具有使电触头和液压操作系统打开和关闭的活动杆。 液压操作系统使用具有高可燃性温度或不燃的液压油。 因此，即使这种液体从液压操作系统泄漏，也会使火灾或爆炸的风险最小化。 液压操作系统可以具有用于流体的密封罐，优选地具有可变体积膨胀室。 在进一步的发展中，液压操作系统和可能的可移动杆的部分被封装在密封的壳体中并且填充有不支持燃烧的气体。 因此，进一步降低了火灾或爆炸的危险。 壳体可以具有可变体积膨胀室。

公开(公告)号：US5274205A

公开(公告)日：1993-12-28

申请号：US37529

申请日：1993-03-26

申请人： Masanori Tsukushi ,  Akira Hashimoto ,  Minori Satoh ,  Yukio Kurosawa ,  Kunio Hirasawa ,  Fumihiro Endo ,  Tokio Yamagiwa

发明人： Masanori Tsukushi ,  Akira Hashimoto ,  Minori Satoh ,  Yukio Kurosawa ,  Kunio Hirasawa ,  Fumihiro Endo ,  Tokio Yamagiwa

IPC分类号： H01H33/70 ,  H01H33/88

CPC分类号： H01H33/703 ,  H01H33/7076

摘要： A gas blast circuit breaker comprises an insulation nozzle for blowing extinguishing gas to an arc generated between a stationary contact and a movable contact. The nozzle has a throat section into and out of which one of the two contacts is movable and a divergent section provided downstream of the throat section. A slanting surface for increasing a reflectivity of energy intensity of the arc is formed on the divergent section of the nozzle. The nozzle is formed of a fluoroplastic material and boron nitride powder of not more than 15 vol. % is added as a filler.

摘要翻译： 燃气断路器包括用于将灭火气体吹送到在固定触点和可动触头之间产生的电弧的绝缘喷嘴。 喷嘴具有进入和离开两个触点中的一个可移动的喉部，以及设置在喉部的下游的发散部分。 在喷嘴的发散部分上形成用于增加电弧能量强度的反射率的倾斜表面。 喷嘴由氟塑料材料和不超过15体积的氮化硼粉末形成。 加入％作为填料。

公开(公告)号：US5038082A

公开(公告)日：1991-08-06

申请号：US489666

申请日：1990-03-07

申请人： Hiroshi Arita ,  Kouzi Suzuki ,  Hiroyuki Sugawara ,  Yukio Kurosawa

发明人： Hiroshi Arita ,  Kouzi Suzuki ,  Hiroyuki Sugawara ,  Yukio Kurosawa

IPC分类号： B01D59/34 ,  H01H33/66 ,  H01J17/56 ,  H01J21/18 ,  H01S3/097 ,  H01T2/00

CPC分类号： H01J17/56 ,  H01J21/18

摘要： A vacuum switch apparatus has an electrically insulating vacuum enclosure which is evacuated to a vacuum degree of 2.times.10.sup.-2 Torr or less. One set of anode and cathode electrodes is arranged in the vacuum enclosure, having capacity which permits the flow of a discharge current of at least 1 KA therebetween and being operable to switch the discharge current at least 10.sup.6 shots. A high voltage power supply applies a high voltage of at least 20 KV across the anode and cathode electrodes. An electron beam irradiation unit irradiates an electron beam on the anode electrode through the cathode electrode. A control electrode is arranged between the beam irradiation unit and the cathode electrode, for controlling passage and interception of the electron beam. A control voltage power supply applies a control voltage to the control electrode. An electromagnetic coil is arranged at least exteriorly of the vacuum enclosure, for generating electromagnetic force which prevents the electron beam, emitted from the electron beam irradiation unit and reaching the anode electrode through the control and cathode electrodes, from being scattered.

公开(公告)号：US4975800A

公开(公告)日：1990-12-04

申请号：US321382

申请日：1989-03-10

申请人： Youichi Oshita ,  Akira Hashimoto ,  Yukio Kurosawa ,  Yoshiaki Inui ,  Tokio Yamagiwa

发明人： Youichi Oshita ,  Akira Hashimoto ,  Yukio Kurosawa ,  Yoshiaki Inui ,  Tokio Yamagiwa

IPC分类号： G01R31/327 ,  H01H11/00 ,  H02H3/50

CPC分类号： H01H11/0062 ,  G01R31/3274 ,  H02H3/50

摘要： A contact abnormality detection system for use in a gas-insulated switchgear or other power transmission or distribution apparatus. A gas-insulated switchgear includes a hermetic housing, an insulating gas sealed in the housing, and conductors in the housing having contacts for providing a path for a large current and being electrically insulated from the housing. An abnormality in the contacts causes the contacts to generate vibrations when a large current flows through them. A vibration detector detects vibrations generated by the switchgear including the vibrations generated by the contacts. The frequency spectrum of the vibrations detected by the vibration detector is analyzed to detect if the vibrations contain frequency components in the range of 200 to 500 Hz which meet predetermined criteria. If the vibrations do contain such frequency components, a contact abnormality decision unit decides that the contacts exhibit a contact abnormality, thereby permitting the abnormality to be identified before the contacts fail.