公开(公告)号：US5305174A

公开(公告)日：1994-04-19

申请号：US753945

申请日：1991-09-03

申请人： Masao Morita ,  Toshiaki Ueda ,  Yukio Kurosawa ,  Hiroshi Arita ,  Tokio Yamagiwa

发明人： Masao Morita ,  Toshiaki Ueda ,  Yukio Kurosawa ,  Hiroshi Arita ,  Tokio Yamagiwa

IPC分类号： H02H9/02 ,  F02B75/02 ,  H02H3/02 ,  H02H7/30 ,  H02H3/08

CPC分类号： H02H7/30 ,  H02H3/025 ,  F02B2075/027

摘要： An electrical power system protection device includes a circuit breaker and a switch connected in series to a power line. The protection device also has a current limiting element connected in parallel to the circuit breaker. When the level of electrical current flowing in the power line, detected by a current detector, has exceeded a predetermined first set level, a first over-current detector delivers immediately a trip command to the circuit breaker. As a consequence, fault current is commutated to the current limiting element so that any drop of voltage in the power line upstream of the circuit breaker is greatly suppressed. When a state in which a predetermined second set level is exceeded by the detected current level is continued beyond a predetermined period, a second over-current detector delivers an off command to the switch, thus protecting the upstream portion of the power line against the fault in this power line. The current level is set to fall within a range which activates a momentary element of an over-current relay of a receiving end breaker of a downstream sub-system connected to the power line. In the event of a failure in the downstream power line, the receiving end breaker is tripped immediately so that the sound portion of the power line is reset to a normal state of operation.

摘要翻译： 电力系统保护装置包括断路器和与电力线串联连接的开关。 保护装置还具有与断路器并联连接的限流元件。 当由电流检测器检测到的在电力线中流动的电流的电平已经超过预定的第一设定电平时，第一过电流检测器立即向断路器提供跳闸命令。 因此，故障电流被转换到限流元件，从而大大抑制了在断路器上游的电力线中的任何电压下降。 当预定的第二设定电平超过检测到的电流电平的状态持续超过预定周期时，第二过电流检测器向开关递送关断命令，从而保护电力线的上游部分免受故障 在这条电力线上。 当前电平被设定为在激活连接到电力线的下游子系统的接收端断路器的过电流继电器的瞬时元件的范围内。 在下游电力线路发生故障的情况下，接收端子断路器立即跳闸，使得电力线路的声音部分被复位到正常的操作状态。

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：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.

公开(公告)号：US5473494A

公开(公告)日：1995-12-05

申请号：US942810

申请日：1992-09-10

申请人： Yukio Kurosawa ,  Youichi Ohshita ,  Masaru Watanabe ,  Isao Nishida ,  Yoshihito Asai ,  Tokio Yamagiwa

发明人： Yukio Kurosawa ,  Youichi Ohshita ,  Masaru Watanabe ,  Isao Nishida ,  Yoshihito Asai ,  Tokio Yamagiwa

IPC分类号： H02H7/22 ,  H02H9/00 ,  H02H9/04 ,  H02H3/00

CPC分类号： H02H7/22 ,  H02H9/005

摘要： An electrical power supply system includes an electrical power source system connected to a bus bar and a plurality of electric power transmission systems each connected via circuit breakers to the bus bar. The supply system has overvoltage suppression equipments each installed between the transmission system and the ground. The overvoltage suppression equipment includes a switching device and an impedance connected to the switching device. The switching device in a sound transmission system is closed when the circuit breaker operates in other faulty transmission system, thereby an overvoltage being occurred on the sound system is effectively suppressed.

摘要翻译： 电源系统包括连接到母线的电源系统和多个电力传输系统，每个电力传输系统通过断路器连接到汇流条。 供电系统具有各自安装在传输系统和地面之间的过电压抑制设备。 过压抑制设备包括开关装置和连接到开关装置的阻抗。 当断路器在其他故障传输系统中工作时，声音传输系统中的开关装置闭合，从而有效地抑制了在声音系统上发生的过电压。

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：US5563459A

公开(公告)日：1996-10-08

申请号：US613132

申请日：1990-11-15

申请人： Yukio Kurosawa ,  Hiroshi Arita ,  Kunio Hirasawa ,  Tadashi Sato

发明人： Yukio Kurosawa ,  Hiroshi Arita ,  Kunio Hirasawa ,  Tadashi Sato

IPC分类号： H01H33/59 ,  F02B75/02 ,  H01H9/54 ,  H01H9/56

CPC分类号： H01H9/56 ,  F02B2075/027 ,  H01H9/563 ,  Y10T307/957

摘要： An apparatus for controlling a switching device provided for breaking or closing a power line connecting a power source to a load in an electric power system includes a switching timing control unit for controlling the timing to apply a breaking signal to said switching device in response to a breaking signal externally applied thereto so that the contacts of said switching device are opened during a period of time when the current flowing through said power line first reaches its peak value from a zero value and for controlling the timing of applying a closing signal to said switching device in response to a closing command preferably externally applied thereto so that the contacts of said switching device are closed when the voltage of said power source becomes a predetermined value depending upon whether said load is capacitive or inductive, and an operating unit for opening and closing said contacts of said switching device in response to said breaking and closing signals, respectively.

摘要翻译： 一种用于控制开关装置的装置，其用于断开或关闭将电源连接到电力系统中的负载的电力线路，包括切换定时控制单元，用于响应于所述切换装置控制对所述开关装置施加断路信号的定时 在外部施加的断开信号，使得在流经所述电力线的电流首先从零值到达其峰值的时间段期间，所述开关装置的触点断开，并且用于控制将闭合信号施加到所述开关的定时 装置，其响应于优选地外部施加到其上的关闭命令，使得当所述电源的电压根据所述负载是电容性还是电感而变为预定值时，所述开关装置的触点闭合，以及用于打开和关闭的操作单元 所述开关装置的所述触点响应于所述断开和闭合信号 太好了

公开(公告)号：US5467049A

公开(公告)日：1995-11-14

申请号：US91623

申请日：1993-07-15

申请人： Junzo Kida ,  Hiroshi Arita ,  Yukio Kurosawa

发明人： Junzo Kida ,  Hiroshi Arita ,  Yukio Kurosawa

IPC分类号： G05F1/12 ,  H03K17/10 ,  H03K17/725 ,  H03K17/72

CPC分类号： H03K17/725 ,  H03K17/105

摘要： A solid-state switch has a plurality of gate turn-off thyristors connected in the rungs of a ladder circuit and a plurality of diodes connected in the side rails of the ladder circuit. The anode of the first gate turn-off thyristor is connected to the cathodes of the first and second diodes, the cathode of the first gate turn-off thyristor is connected to the anodes of the third and fourth diodes. The cathode of the second gate turn-off thyristor is connected to the anode of the second diode and the anode of the fifth diode, the anode of the second gate turn-off thyristor is connected to the cathode of the fourth diode and the cathode of the sixth diode. The anode of the first diode and the cathode of the third diode are connected together at a common point, which is selected to be one terminal of the switch. The cathode of the fifth diode and the anode of the sixth diode or the anode of one and the cathode of the other one of the last two diodes of the ladder circuit are connected together at a common point, which is selected to be the other terminal of the switch.

摘要翻译： 固态开关具有连接在梯形电路的梯级中的多个栅极截止晶闸管和连接在梯形电路的侧轨中的多个二极管。 第一栅极截止晶闸管的阳极连接到第一和第二二极管的阴极，第一栅极截止晶闸管的阴极连接到第三和第四二极管的阳极。 第二栅极截止晶闸管的阴极连接到第二二极管的阳极和第五二极管的阳极，第二栅极截止晶闸管的阳极连接到第四二极管的阴极和第四二极管的阴极 第六个二极管。 第一二极管的阳极和第三二极管的阴极在共同的点连接在一起，其被选择为开关的一个端子。 第五二极管的阴极和第六二极管的阳极或一个的阳极和梯形电路的最后两个二极管中另一个的另一个的阴极在共同的点连接在一起，其被选择为另一个端子 的开关。

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：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。