Device for a unipolarly operated electrical circuit component
    14.
    发明授权
    Device for a unipolarly operated electrical circuit component 失效
    用于单极操作电路元件的装置

    公开(公告)号:US5047911A

    公开(公告)日:1991-09-10

    申请号:US223035

    申请日:1988-07-22

    CPC classification number: H02M3/3353 H02M3/335

    Abstract: The invention relates to a device (20) for a unipolarly operated component (9) capable of storing energy. This device (20) can be applied, for example, in an asymmetrical half bridge circuit (1). It compensates the dc magnetic flux which originates due to the unipolar operation and, hence permits making relatively small in size the component (9) capable of storing energy. Using a current converter (25, 32) with suitable winding ratio as an automatic and load-dependent compensation device, moreover, permits very flexible adaptation to load changes. Such adaptation is, in particular, required when very high pulsating current occurs on the primary side with simultaneous secondary no-load operation.

    Abstract translation: 本发明涉及一种用于能够存储能量的单极操作部件(9)的装置(20)。 该装置(20)可以应用于例如非对称半桥电路(1)中。 它补偿由于单极操作而产生的直流磁通,因此允许使能够存储能量的部件(9)的尺寸相对较小。 此外,使用具有适当绕组比率的电流转换器(25,32)作为自动和负载相关的补偿装置,允许非常灵活地适应负载变化。 特别地,当具有同时的二次空载操作的初级侧发生非常高的脉动电流时,特别需要这种适配。

    Directly heatable crucible for induction melting furnaces
    15.
    发明授权
    Directly heatable crucible for induction melting furnaces 失效
    用于感应熔炼炉的直接可加热坩埚

    公开(公告)号:US5022044A

    公开(公告)日:1991-06-04

    申请号:US391125

    申请日:1989-08-09

    CPC classification number: F27D9/00 F27B14/061 F27B14/10 H05B6/24

    Abstract: In a directly heatable crucible 3 for induction melting furnaces, especially for melting refractory and highly-pure metals, including an inductor coil 11 surrounding a crucible 3 and a housing 5, which at least partially encloses the inductor coil 11 and the crucible 3 and which forms together with the external wall 9, 9' of the crucible a closed chamber having an annular portion 10 and a flat cylindrical base portion 10'. This chamber is passed through by a cooling agent and the crucible 3 is made of the material to be molten.

    Abstract translation: 在用于感应熔炼炉的直接可加热坩埚3中,特别是用于熔化难熔和高纯度金属,包括围绕坩埚3的电感线圈11和壳体5,其至少部分地包围电感线圈11和坩埚3, 与坩埚的外壁9,9'一起形成具有环形部分10和平坦圆柱形基部10'的封闭室。 该室由冷却剂通过,坩埚3由待熔融的材料制成。

    Device and method for the control and monitoring of an electron beam for
metal working
    16.
    发明授权
    Device and method for the control and monitoring of an electron beam for metal working 失效
    用于金属加工的电子束的控制和监控的装置和方法

    公开(公告)号:US4973818A

    公开(公告)日:1990-11-27

    申请号:US327830

    申请日:1989-03-23

    CPC classification number: H01J37/302 H01J37/305

    Abstract: A device and a method for the control and monitoring of a deflectable electron beam is provided for the working of metal wherein the electron beam is not permitted to go beyond an allowed working area. With this device with the aid of a Teach-In method the limits are entered into a computer. The computer generates an image of the areas allowed for the electron beam in a particular area of a special memory. This memory is so organized that the addresses of the point of the particular areas correspond to the digitized coordinates of the point of impingement of the electron beam. The characterization of the allowed and forbidden target points of the electron beam takes place through placing or deleting respectively the assigned bits in the special memories.

    Abstract translation: 提供了一种用于控制和监测可偏转电子束的装置和方法,用于金属加工,其中电子束不允许超过允许的工作区域。 借助于“Teach-In”方法,该设备将限制输入计算机。 计算机在特殊存储器的特定区域中产生电子束允许的区域的图像。 该存储器是如此组织的,使得特定区域的点的地址对应于电子束的撞击点的数字化坐标。 电子束允许和禁止的目标点的表征通过分别放置或删除特殊存储器中的指定位来进行。

    Apparatus for controlling the distance of a melting electrode from the
surface of the melted material in a vacuum arc furnace
    17.
    发明授权
    Apparatus for controlling the distance of a melting electrode from the surface of the melted material in a vacuum arc furnace 失效
    用于在真空电弧炉中控制熔融电极与熔融材料表面的距离的装置

    公开(公告)号:US4797897A

    公开(公告)日:1989-01-10

    申请号:US110721

    申请日:1987-08-10

    CPC classification number: H05B7/152 Y02P10/256 Y02P10/259

    Abstract: Apparatus for controlling the distance of a melting electrode from the surface of melted material in a vacuum arc furnace which uses short circuits caused by the droplets between the melting electrode and the surface of the melted material as a control criterion. The short circuits occurring within a given period of time--the so-called droplet rate--are determined and supplied to an averager which is connected with a controller that controls an electric driving mechanism for the melting electrode. According to the invention, the controller is responsive to a signal representing the difference between the reciprocal value of the droplet rate signal formed by the averager and a desired time, this desired time being equal to the desired average time between two consecutive droplet short circuits.

    Abstract translation: PCT No.PCT / DE87 / 00487 Sec。 371日期1987年8月10日 102(e)日期1987年8月10日PCT申请日1986年11月29日PCT公开号 公开号WO87 / 03772 日期:1987年6月18日。用于在熔化电极和熔融材料表面之间的液滴引起的短路的真空电弧炉中控制熔融电极与熔融材料表面的距离的装置作为控制标准 。 在给定时间段内发生的短路(即所谓的液滴速率)被确定并提供给与控制熔融电极的电驱动机构的控制器连接的平均器。 根据本发明,控制器响应于表示由平均器形成的液滴速率信号的倒数值与期望时间之间的差的信号,该期望时间等于两个连续液滴短路之间的期望平均时间。

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