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    • 32. 发明授权
    • Contact electrode material for vacuum interrupter and method of
manufacturing the same
    • 真空灭弧室接触极材料及其制造方法
    • US4686338A
    • 1987-08-11
    • US698865
    • 1985-02-06
    • Yoshiyuki KashiwagiYasushi NodaKaoru Kitakizaki
    • Yoshiyuki KashiwagiYasushi NodaKaoru Kitakizaki
    • C22C32/00H01H1/02B22F3/26C22C29/06H01H33/66
    • H01H1/0206C22C32/0052
    • A novel contact electrode material for vacuum interrupters is disclosed, by which the chopping current value inherent in contact material can be reduced so that it is possible to stably interrupt small lagging current due to inductive loads without generating surge voltages. The material is equivalent or superior to the conventional Cu-0.5Bi material in large current interrupting capability and dielectric strength. The material consists essentially of copper, chromium, iron or molybdenum and chromium carbide or molybdenum carbide. The metallographical microstructure is such that copper is infiltrated into a porous matrix formed by mutually bonding chromium powder, iron or molybdenum powder and metal carbide powder in diffusion state. In its manufacturing process, firstly copper is placed onto a powder mixture of chromium, iron or molybdenum, and chromium carbide or molybdenum carbide, and then the copper and the powder mixture is heated within a nonoxidizing atmosphere at a first temperature lower than the copper melting point and thereafter again at a second temperature higher than the copper melting point.
    • 公开了一种用于真空断路器的新型接触电极材料,通过该接触电极材料可以减小接触材料固有的斩波电流值,从而可以稳定地中断由于感性负载而导致的滞后电流,而不产生浪涌电压。 该材料相当于或优于传统的Cu-0.5Bi材料,具有大的电流中断能力和介电强度。 该材料基本上由铜,铬,铁或钼和碳化铬或碳化钼组成。 金相显微结构是铜渗透到通过相互键合铬粉末,铁或钼粉末和扩散状态的金属碳化物粉末形成的多孔基体中。 在其制造过程中,首先将铜放置在铬,铁或钼的粉末混合物和碳化铬或碳化钼上,然后铜和粉末混合物在非氧化气氛中在低于铜熔融的第一温度下加热 然后再次高于铜熔点的第二温度。
    • 33. 发明授权
    • Method and system for reconnecting inverter to rotating motors
    • 将变频器重新连接到旋转电机的方法和系统
    • US4607205A
    • 1986-08-19
    • US661309
    • 1984-10-16
    • Yasutami KitoKuniake Yasukawa
    • Yasutami KitoKuniake Yasukawa
    • H02P3/18H02P1/26H02P1/30H02P23/06H02P27/06H02P27/08
    • H02P27/08H02M7/53875H02P1/30H02P23/06H02P1/029
    • When an inverter is disconnected from a rotating motor due to power failure or motor accident, it is necessary to connect the inverter power again to the motor rotating by the inertia force in order to keep the motor rotating. To achieve the above reconnection, the inverter is controlled in accordance with the open-loop control method, without use of any motor speed detecting means, thus improving control response speed. In reconnection, the inverter is started at a frequency higher than the rotating motor speed and at a voltage lower than the rated value; only the frequency is decreased gradually but increased gradually again when the detected motor driving current reaches zero or the motor regenerated current starts flowing; and the voltage is raised when the detected motor regenerated current reaches its maximum value.
    • 当变频器由于电源故障或电机故障而与旋转电机断开连接时,需要再次将变频器的电源连接到通过惯性力旋转的电机,以保持电机的旋转。 为了实现上述重新连接,逆变器根据开环控制方式进行控制,不使用任何电动机速度检测装置,从而提高控制响应速度。 在重新连接时,逆变器以比旋转电动机速度高的频率和低于额定值的电压起动; 当检测到的电动机驱动电流达到零或电动机再生电流开始流动时,只有频率逐渐减小,但再次逐渐增加; 当检测到的电动机再生电流达到最大值时,电压升高。
    • 34. 发明授权
    • Vacuum interrupter
    • 真空灭弧室
    • US4584445A
    • 1986-04-22
    • US589295
    • 1984-03-14
    • Yoshiyuki KashiwagiYasushi NodaKaoru Kitakizaki
    • Yoshiyuki KashiwagiYasushi NodaKaoru Kitakizaki
    • H01H1/02H01H11/04H01H33/664H01H33/66
    • H01H33/6644H01H1/0203H01H11/04Y10T29/49206
    • A vacuum interrupter of more improved large current interrupting capability and dielectric strength is disclosed. The interrupter has a pair of separable contact-electrodes (13, 24), a vacuum envelope (4) generally electrically insulating and enclosing the pair therewithin, a contact-making portion (19) of 20 to 60% IACS electrical conductivity being a part of one contact-electrode (13) of the pair and being into and out of engagement with the other contact-electrode (24) of the pair, an arc-diffusing portion (20) of 2 to 30% IACS electrical conductivity being the other part of the one contact-electrode (13) and being electrically and mechanically connected to the contact-making portion (19) so as to be spaced from the other contact-electrode (24) when the contact-electrodes (13, 24) are into engagement, and means (14, 15) for applying an axial magnetic field in parallel to an arc established between the contact-electrodes (13, 24) when separated.
    • 公开了一种具有更大改善的大电流中断能力和介电强度的真空断路器。 断路器具有一对可分离的接触电极(13,24),一个通常电绝缘并在其内包围的真空外壳(4),具有20至60%IACS导电性的接触部分(19)是部分 的一对接触电极(13),与该对的另一个接触电极(24)进入和离开接合,2〜30%的IACS电导率的电弧扩散部分(20)是另一个 所述一个接触电极(13)的一部分并且当所述接触电极(13,24)是接触电极(13,24)时,与所述接触部分(19)电连接并机械连接以与所述另一个接触电极(24)间隔开 以及用于当分离时施加平行于在接触电极(13,24)之间建立的电弧的轴向磁场的装置(14,15)。
    • 35. 发明授权
    • Current-type GTO inverter using GTO in its surge voltage clamping circuit
    • 电流型GTO逆变器在其浪涌电压钳位电路中使用GTO
    • US4580205A
    • 1986-04-01
    • US587642
    • 1984-03-08
    • Kohki Matsuse
    • Kohki Matsuse
    • H02H7/12H02M1/00H02M5/45H02M7/515H02M7/757H02P27/06
    • H02M5/4505H02M7/515H02M7/5152H02M7/757
    • In a current type GTO inverter, commutation surge voltage is inevitably generated from an inductive load whenever each GTO is turned off. The commutation surge voltage thus generated is once stored in a capacitor through a diode surge voltage rectifier and then restored or regenerated to the DC source terminals of the GTO bridge-connected inverter through a pair of other GOTS turned on only when the capacitor voltage exceeds a predetermined value beyond the DC source voltage. After energy restoration, magnetic energy stored in a reactor is recharged in the same capacitor. The necessary elements are a capacitor, two GTOs, two diodes and a DC reactor, thus simplifying the circuit configuration and reducing the cost. Additionally, since no vibration circuits to turn off thyristors for restoring the energy charged in the capacitor to the GTO bridge-connected inverter are required, the circuit operation is stable at higher frequency range, in particular.
    • 在当前类型的GTO逆变器中,每当关闭GTO时,不可避免地从感性负载产生换向浪涌电压。 这样产生的换向浪涌电压一旦通过二极管浪涌电压整流器存储在电容器中,然后通过一对其他GOTS仅在电容器电压超过一个时才导通的GTO桥接逆变器的直流电源端子恢复或再生 超过DC源电压的预定值。 在能量恢复之后,储存在电抗器中的磁能在同一电容器中再充电。 必要的元件是电容器,两个GTO,两个二极管和一个直流电抗器,从而简化了电路配置并降低了成本。 此外,由于不需要振荡电路来关闭用于将电容器中充电的能量恢复到GTO桥连接的逆变器,所以电路操作尤其在更高的频率范围内是稳定的。
    • 36. 发明授权
    • Vacuum interrupter
    • 真空灭弧室
    • US4528432A
    • 1985-07-09
    • US611978
    • 1984-05-18
    • Katsuaki SenbaJunichi Warabi
    • Katsuaki SenbaJunichi Warabi
    • H01H33/66H01H33/662
    • H01H33/66207H01H2033/66215H01H2033/66223H01H2033/66276H01H33/66238
    • A vacuum interrupter, an envelope of which includes a pair of electrical lead rods of copper or copper-based alloy, one lead rod being brazed vacuum-tight to one end plate via a first tubular sealing member fitted onto one rod, and a bellows surrounding another lead rod, an outer end of the bellows being joined vacuum-tight to another end plate and an inner end of the bellows being brazed vacuum-tight to the other lead rod via a second tubular sealing member fitted onto the other lead rod. Each sealing member is made of an iron-based alloy and has an inner wall including a groove retaining solid brazing metal and two vacuum-tight brazing surfaces opposing each rod across a small clearance. The molten brazing metal permetates through the clearance due to wetablility and capillary action without erodingly diffusing into the opposing surfaces of the lead rods and the first and second sealing members.
    • 真空断路器,其外壳包括一对铜或铜基合金的电引线,一个引线通过安装在一个杆上的第一管状密封构件和一个围绕着波纹管的真空密封而被真空密封在一个端板上 另一个导杆,波纹管的外端被真空密封地连接到另一个端板,并且波纹管的内端通过安装在另一导杆上的第二管状密封构件被真空密封地焊接到另一个导杆。 每个密封件均由铁基合金制成,并具有内壁,该内壁包括保持固体钎焊金属的槽和两个隔着小间隙与每个杆相对的真空密封钎焊表面。 熔融钎焊金属由于润湿性和毛细作用而通过间隙排列,而不会侵蚀到引线杆和第一和第二密封构件的相对表面中。
    • 38. 发明授权
    • Vacuum interrupter
    • 真空灭弧室
    • US4499349A
    • 1985-02-12
    • US441735
    • 1982-11-15
    • Shinzo SakumaJunichi WarabiMasayuki KanoYutaka Kashimoto
    • Shinzo SakumaJunichi WarabiMasayuki KanoYutaka Kashimoto
    • H01H33/66H01H33/662
    • H01H33/66207H01H2033/66215H01H2033/66223
    • A vacuum interrupter has a hollow metallic cylinder, insulating end plates made of inorganic insulating material and connected to the opposite ends of the metallic cylinder, stationary and movable lead rods which extend into the metallic cylinder through the insulating end plates and which support separable electrical contacts, a bellows connecting the movable lead rod to the corresponding insulating end plate, and auxiliary sealing members which connect the metallic cylinder to both the insulating end plates by means of brazing. At least one of each pair of members to be brazed has a groove for solid brazing material which is closed from the vacuum chamber of the interrupter. The vacuum interrupter facilitates arrangement of the solid brazing material in a temporary assembly step and greatly reduces the amount of vaporized brazing material dispersed into the vacuum chamber of the interrupter in a vacuum brazing step. Thus, the interrupter is provided with improved dielectric strength.
    • 真空断路器具有中空的金属圆筒,由无机绝缘材料制成的绝缘端板,与金属圆筒的相对端连接,固定和可移动的导杆,其通过绝缘端板延伸到金属圆筒中,并且支撑可分离的电触头 将可动引线连接到相应的绝缘端板的波纹管以及通过钎焊将金属圆筒连接到两个绝缘端板的辅助密封构件。 要钎焊的每对构件中的至少一个具有用于固体钎焊材料的凹槽,其从断流器的真空室封闭。 真空断路器有助于在临时组装步骤中布置固体钎焊材料,并且在真空钎焊步骤中大大减少分散到断续器的真空室中的汽化钎料的量。 因此,断续器具有改善的介电强度。