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    POWER SUPPLY SYSTEM FOR AN ELECTRIC ARC FURNACE
    2.
    发明公开
    POWER SUPPLY SYSTEM FOR AN ELECTRIC ARC FURNACE 审中-公开

    公开(公告)号：US20230199924A1

    公开(公告)日：2023-06-22

    申请号：US17926233

    申请日：2021-05-19

    申请人： CEA GROUP S.R.L.

    发明人： Oreste FUSARI

    IPC分类号： H05B7/148 ,  H05B7/00 ,  H02M7/217 ,  H02M7/219 ,  H02M1/12

    CPC分类号： H05B7/148 ,  H05B7/005 ,  H02M7/2173 ,  H02M7/219 ,  H02M1/126

    摘要： A power supply system for an arc furnace, suitable for converting voltage of a three-phase electric power network into power supply voltage for the arc furnace, has an indirect AC/AC converter having a converter input and a converter output, and a matching apparatus having a matching transformer having a secondary side connectable to the arc furnace and a primary side operatively connected to the converter output. An input transformer group, inserted between the indirect AC/AC converter and the three-phase electric power network, has an input transformer primary side connectable to the three-phase electric power system, an input transformer secondary side connected to the converter input, a first input transformer and a second input transformer. Each of the first and second input transformers has three mutually displaced groups of secondary windings, each of which has a winding for each phase corresponding to a phase of the three-phase electric power network.

    DEVICE AND METHOD FOR CONTROLLING AN ELECTRIC ARC FURNACE IN THE INITIAL PHASE OF A MELTING PROCESS
    6.
    发明申请
    DEVICE AND METHOD FOR CONTROLLING AN ELECTRIC ARC FURNACE IN THE INITIAL PHASE OF A MELTING PROCESS 审中-公开
    在熔融过程初期控制电弧炉的装置和方法

    公开(公告)号：US20150215998A1

    公开(公告)日：2015-07-30

    申请号：US14428691

    申请日：2013-10-09

    申请人： MASCHINENFABRIK REINHAUSEN

    发明人： Klaus Krueger ,  Dieter Dohnal ,  Karsten Viereck ,  Alexei Babizki

    IPC分类号： H05B7/148 ,  F27D19/00

    CPC分类号： H05B7/148 ,  F27D19/00 ,  F27D2019/0037 ,  H05B7/144 ,  Y02P10/256 ,  Y02P10/259

    摘要： Disclosed is a device and a method for regulating an electric arc furnace (10) in the initial phase of a smelting process. A sensor (16) for measuring the present voltage and a sensor (15) for measuring the presently flowing current are provided in each line (7) of the electric arc furnace (10). The actual impedance (Zist) is time-dependently calculated by a control and regulating unit (30). An on-load tap changer (20) that is constructed as a semiconductor tap changer, is assigned to a furnace transformer (6) with a primary side (6P) and a secondary side (6S). The semiconductor tap changer (20) realizes a cycle time of a few milliseconds.

    摘要翻译： 公开了一种在冶炼过程的初始阶段调节电弧炉（10）的装置和方法。 用于测量当前电压的传感器（16）和用于测量当前流动电流的传感器（15）设置在电弧炉（10）的每条线（7）中。 实际阻抗（Zist）由控制和调节单元（30）时间依赖性地计算。 被构造为半导体分接开关的有载分接开关（20）被分配给具有初级侧（6P）和次级侧（6S）的炉式变压器（6）。 半导体分接开关（20）实现了几毫秒的周期时间。

    METHOD FOR CONTROLLING A MELT PROCESS IN AN ARC FURNACE AND SIGNAL PROCESSING COMPONENT, PROGRAM CODE AND DATA MEDIUM FOR PERFORMING SAID METHOD
    10.
    发明申请
    METHOD FOR CONTROLLING A MELT PROCESS IN AN ARC FURNACE AND SIGNAL PROCESSING COMPONENT, PROGRAM CODE AND DATA MEDIUM FOR PERFORMING SAID METHOD 有权
    用于控制电弧炉熔融过程的方法和信号处理组件，程序代码和数据介质，用于执行方法

    公开(公告)号：US20120183010A1

    公开(公告)日：2012-07-19

    申请号：US13498760

    申请日：2010-09-14

    申请人： Björn Dittmer ,  Arno Döbbeler ,  Klaus Krüger ,  Sascha Leadbetter ,  Thomas Matschullat ,  Detlef Rieger

    发明人： Björn Dittmer ,  Arno Döbbeler ,  Klaus Krüger ,  Sascha Leadbetter ,  Thomas Matschullat ,  Detlef Rieger

    IPC分类号： H05B7/148

    CPC分类号： H05B7/148 ,  C21C5/5211 ,  C21C2005/5288 ,  C21C2300/06 ,  F27B3/28 ,  F27D19/00 ,  F27D21/00 ,  Y02P10/216 ,  Y02P10/256 ,  Y02P10/259 ,  Y02P10/286

    摘要： A method for controlling a melt process in an arc furnace and signal processing component, program code, and data medium for performing said method are provided. According to the method, sound signals or vibrations from the interior of the furnace container are captured by solid-borne sound sensors, from which characteristic values can be derived for the distribution of melting material, melt, and slag in the furnace fill. A characteristic value SM for thermal radiation impinging on the furnace wall of the container, a characteristic value M for the lumpiness of the melting material in the volume of furnace fill, and a characteristic value MM for the change to the portion of solid melting material contacting the furnace wall are generated in priority sequence. The energy distribution at the electrodes is changed by a control system analyzing the characteristic values in priority sequence, such that thermal load peaks are dampened or even completely prevented. To this end, the strand impedances stored as target values are modified. If the control is not sufficient, the thermal power of the arc is reduced as a subordinate means. A rapidly and reliably effective operating regime for the processes in the arc furnace can thereby be implemented.

    摘要翻译： 提供了一种用于控制电弧炉中的熔融过程的方法和用于执行所述方法的信号处理组件，程序代码和数据介质。 根据该方法，由固体声音传感器捕获来自炉容器内部的声音信号或振动，从而可以从熔炉材料，熔体和炉渣在炉子填充物中的分布获得特征值。 暴露在容器炉壁上的热辐射的特征值SM，熔化材料在炉料体积中的块状物的特征值M，以及与熔融材料接触部分变化的特征值MM 炉壁以优先顺序生成。 通过分析优先级序列中的特征值的控制系统改变电极处的能量分布，使得热负荷峰值被抑制或甚至完全防止。 为此，修改存储为目标值的线束阻抗。 如果控制不充分，则电弧的热功率作为从属方式减小。 因此可以实现电弧炉中的工艺的快速可靠的有效操作方案。