公开(公告)号：US06687284B1

公开(公告)日：2004-02-03

申请号：US10129104

申请日：2002-09-09

申请人： François Beauregard ,  Bruno Francoeur

发明人： François Beauregard ,  Bruno Francoeur

IPC分类号： H05B7144

CPC分类号： H05B7/00 ,  H05B7/144 ,  H05H1/36 ,  H05H1/48 ,  Y02P10/256 ,  Y02P10/259

摘要： To re-ignite efficiently an arc-furnace arc extending between an electrode and a material to be melt, a second energy supply is provided to maintain a plasma link between the electrode and the melting material when the arc-furnace arc is interrupted The electrode is supplied by a large current power supply including a large current conductor having a self inductance and being connected to the electrode. The second energy supply is an electrical power supply wherein a high frequency bypass impedance is provided in a supply path to the large current conductor at a distance from a capacitive circuit to allow a high frequency resonant circuit to be formed by the conductor section between the capacitive circuit and the bypass impedance without adversely affecting the large current power supply of the arc furnace. The capacitive circuit comprises an HF power supply injected in resonance with the resonant circuit to build an oscillating voltage and use the oscillating voltage to inject an HF current between the electrode and the melting metal in order to maintain the plasma link.

摘要翻译： 为了有效地重新点燃在电极和要熔化的材料之间延伸的电弧炉弧，当电弧炉电弧被中断时，提供第二能量供应源以保持电极和熔化材料之间的等离子体连接。电极是 由包括具有自感的大电流导体并连接到电极的大电流电源提供。 第二能量源是电源，其中在与电容电路相距一定距离处的大电流导体的供应路径中提供高频旁路阻抗，以允许高频谐振电路由导体部分形成在电容 电路和旁路阻抗，而不会对电弧炉的大电流电源产生不利影响。 电容电路包括与谐振电路共振注入的HF电源，以建立振荡电压，并使用振荡电压在电极和熔融金属之间注入HF电流，以维持等离子体连接。

公开(公告)号：US06519274B2

公开(公告)日：2003-02-11

申请号：US09778835

申请日：2001-02-08

申请人： Thomas Lai Wai Ma ,  Mohammad Sedighy ,  Brian Kenneth Perkins ,  Theodorus Anthonius Gerritsen ,  Janos Rajda

发明人： Thomas Lai Wai Ma ,  Mohammad Sedighy ,  Brian Kenneth Perkins ,  Theodorus Anthonius Gerritsen ,  Janos Rajda

IPC分类号： H05B7144

CPC分类号： H05B7/148 ,  C21C5/5211 ,  C21C5/5294 ,  Y02P10/216 ,  Y02P10/256 ,  Y02P10/259

摘要： A power control system for an AC electric arc furnace. The control system includes variable reactors located intermediate a furnace power supply and arc electrodes that are height adjustable. The control system monitors operating characteristics of the furnace that are indicative of the active power consumption of the furnace and adjusts the variable reactors and the electrode height so as to minimize variations in the active power consumption. Loss of electrode arc can be predicted and countered by lowering the electrodes and decreasing the reactance of the variable reactors.

公开(公告)号：US06660967B2

公开(公告)日：2003-12-09

申请号：US09941150

申请日：2001-08-28

申请人： Roger W. Brofft ,  Roger Lee Rieckers ,  William Roland Cooper

发明人： Roger W. Brofft ,  Roger Lee Rieckers ,  William Roland Cooper

IPC分类号： H05B7144

CPC分类号： F02B63/04 ,  F02B63/06 ,  F02B2075/1808

摘要： An integrated power unit for use in a bed of a pickup truck. A lower housing is sized to fit between the rear wheel wells of the pickup truck, and opposed upper housings extend over respective opposed sidewalls of the truck bed. The opposed upper housings are adjustable with respect to the lower housing, so that the integrated power unit may be used with various makes and models of pickup trucks. The lower housing contains an internal combustion engine for generating mechanical power, an alternator and electrically driven compressors. Ducting and baffles facilitate air flow and cooling in the lower housing. A fuel tank is formed by one of the upper housings, and a control panel is located in the other upper housing. Connections for electrical power and regulated and unregulated pneumatic power are available at the control panel.

公开(公告)号：US06608857B2

公开(公告)日：2003-08-19

申请号：US09846885

申请日：2001-05-01

申请人： Manoharan Thamodharan ,  Albrecht Wolf

发明人： Manoharan Thamodharan ,  Albrecht Wolf

IPC分类号： H05B7144

CPC分类号： H05B7/148 ,  H05B7/005 ,  H05B7/144 ,  Y02P10/256 ,  Y02P10/259

摘要： A new control method is used to regulate the reactive power consumption of an electric arc furnace. Active and reactive power values are used space vector variables and serve as control parameter of the power source, which consists of a furnace transformer with current controllers and a booster transformer. This method helps maintain constant reactive power consumption, reduce flicker at the point of common coupling and minimize the disturbances in the power system.

摘要翻译： 采用新的控制方法来调节电弧炉的无功功率消耗。 有功和无功功率值用空间矢量变量作为电源的控制参数，由具有电流控制器的炉式变压器和增压变压器组成。 该方法有助于保持无功功率消耗，减少公共耦合点的闪烁，并最大限度地减少电力系统的干扰。

公开(公告)号：US06226313B1

公开(公告)日：2001-05-01

申请号：US09419654

申请日：1999-10-18

申请人： Manoharan Thamodharan ,  Albrecht Wolf

发明人： Manoharan Thamodharan ,  Albrecht Wolf

IPC分类号： H05B7144

CPC分类号： H05B7/148 ,  H05B7/005 ,  H05B7/144 ,  Y02P10/256 ,  Y02P10/259

摘要： A power source for an arc furnace having an intermediate circuit transformer including a magnetic decoupled booster transformer and an AC main-driven converter. Such a power source comprises a current controller and a zero voltage switch. The current controller and the zero voltage switch are integrated in the intermediate circuit transformer. The zero voltage switch short-circuits the main reactance of the booster transformer whenever the current controller faces a current cut off and is blocked.

摘要翻译： 一种具有中间电路变压器的电弧炉的电源，该中间电路变压器包括一个磁性去耦升压变压器和一个AC主驱动转换器。 这种电源包括电流控制器和零电压开关。 电流控制器和零电压开关集成在中间电路变压器中。 当电流控制器面临电流切断并被阻塞时，零电压开关会使升压变压器的主电抗短路。

公开(公告)号：US06192065B1

公开(公告)日：2001-02-20

申请号：US09428919

申请日：1999-10-28

申请人： Jan Abraham Ferreira ,  Anthony Wayne Wewege

发明人： Jan Abraham Ferreira ,  Anthony Wayne Wewege

IPC分类号： H05B7144

CPC分类号： H05B7/00

摘要： In the operation of a dc arc furnace components of the furnace are monitored to detect unwanted arcs. A first low impedance path is continuously established between the components. When an arc is detected a second conductive path of a predetermined impedance is established between the components, in parallel to the first low impedance path, to extinguish the arc. After the arc has been extinguished the second path is open circuited to restore the furnace to normal operation.

摘要翻译： 在直流电弧炉的操作中，监测炉子的部件以检测不需要的电弧。 在组件之间连续建立第一个低阻抗路径。 当检测到电弧时，在与第一低阻抗路径平行的部件之间建立预定阻抗的第二导电路径以熄灭电弧。 电弧熄灭后，第二路径开路，将炉恢复正常运行。

公开(公告)号：US06603795B2

公开(公告)日：2003-08-05

申请号：US09778835

申请日：2001-02-08

申请人： Thomas Lai Wai Ma ,  Mohammad Sedighy ,  Brian Kenneth Perkins ,  Theodorus Anthonius Gerritsen ,  Janos Rajda

发明人： Thomas Lai Wai Ma ,  Mohammad Sedighy ,  Brian Kenneth Perkins ,  Theodorus Anthonius Gerritsen ,  Janos Rajda

IPC分类号： H05B7144

CPC分类号： H05B7/148 ,  C21C5/5211 ,  C21C5/5294 ,  Y02P10/216 ,  Y02P10/256 ,  Y02P10/259

摘要： A power control system for an AC electric arc furnace. The control system includes variable reactors located intermediate a furnace power supply and arc electrodes that are height adjustable. The control system monitors operating characteristics of the furnace that are indicative of the active power consumption of the furnace and adjusts the variable reactors and the electrode height so as to minimize variations in the active power consumption. Loss of electrode arc can be predicted and countered by lowering the electrodes and decreasing the reactance of the variable reactors.

摘要翻译： 交流电弧炉功率控制系统。 控制系统包括位于炉电源和高度可调的电弧电极之间的可变电抗器。 控制系统监测炉的操作特性，其指示炉的有功功率消耗，并且调节可变电抗器和电极高度，以便最小化有功功率消耗的变化。 可以通过降低电极和降低可变电抗器的电抗来预测和抵消电极电弧的损失。

公开(公告)号：US06466605B1

公开(公告)日：2002-10-15

申请号：US09597497

申请日：2000-06-20

申请人： J. Kenneth Wittle ,  Richard A. Hamilton ,  Charles S. Titus

发明人： J. Kenneth Wittle ,  Richard A. Hamilton ,  Charles S. Titus

IPC分类号： H05B7144

CPC分类号： C03B5/005 ,  C03B5/025 ,  F23G5/10 ,  F23G2202/20 ,  F23G2900/51001 ,  F27B3/085 ,  F27B3/12 ,  F27D1/0006 ,  F27D11/08 ,  F27D99/0006 ,  F27D2003/161 ,  F27D2099/0023 ,  F27D2099/0058 ,  F27D2099/006 ,  H05B7/06 ,  H05B7/109

摘要： An electrode assembly comprising concentric tubular electrodes is provided for high temperature processing of materials. The electrode assembly is connected with a power supply that includes switching means for alternatively operating the electrode assembly in a transferred mode of operation, in a non-transferred mode of operation, or according to a controlled sequence of non-transferred and transferred modes of operation. The power supply system includes variable inductors, such as leakage-coupled reactors, for controlling the electrical power supplied to the electrodes for producing a DC arc. The electrode assembly can be incorporated into an arc furnace for processing waste material in the furnace. The electrode assembly is also suitable for use in the practice of in-situ vitrification and remediation of contaminated soil. During in-situ vitrification, the electrode assembly may also be operated in the non-transferred mode, while being withdrawn from holes in the earth, to produce vitrified columns of soil. The vitrified columns of soil can be coalesced with similar adjacent columns of soil in order to form a composite or unitary subterranean mass or barrier for contaminated material in a selected area. Multiple electrode assemblies can be employed to treat contamination located within a large area. An AC potential can be applied to adjacent electrode assemblies in order to promote coalescence of the adjacent columns of treated soil to form a composite or unitary mass.

摘要翻译： 提供包括同心管状电极的电极组件用于材料的高温处理。 电极组件与包括切换装置的电源连接，该开关装置用于以非转移的操作模式或按照受控顺序的非转移和转移的操作模式在转移的操作模式中操作电极组件 。 电源系统包括可变电感器，例如泄漏耦合电抗器，用于控制提供给电极的电力以产生直流电弧。 电极组件可以并入电弧炉中，用于在炉中处理废料。 电极组件也适用于实际的现场玻璃化和污染土壤的修复。 在原位玻璃化期间，电极组件也可以在非转移模式下操作，同时从地球中的孔中取出，以产生玻璃化的土壤柱。 土壤的玻璃化柱可以与类似的相邻的土壤柱聚结，以便在选定的区域中形成用于受污染材料的复合或整体地下物质或屏障。 可以使用多个电极组件来处理位于大面积内的污染物。 可以将AC电势施加到相邻的电极组件，以便促进经处理的土壤的相邻列的聚结，以形成复合或单一质量。

公开(公告)号：US06421366B1

公开(公告)日：2002-07-16

申请号：US09959072

申请日：2001-11-21

申请人： Dirk Breker ,  Bernhard Espendiller ,  Guido Grund ,  Klaus Schmale

发明人： Dirk Breker ,  Bernhard Espendiller ,  Guido Grund ,  Klaus Schmale

IPC分类号： H05B7144

CPC分类号： H02J3/38 ,  F27B3/085 ,  F27B3/28 ,  H02M5/4585 ,  H05B7/005 ,  H05B7/144 ,  Y02P10/256 ,  Y02P10/259

摘要： The invention pertains to a process and to a device for supplying current to an electric-arc melting unit for melting and heating metal, especially steel, with a three-phase a.c. source, which sends the current via devices for producing direct current or alternating current to at least one electrode projecting into the vessel of the melting unit. The three-phase a.c. source (91) is followed by at least two power supply modules (41, 4n), connected in parallel, where each power supply module (41; 4n) has an uncontrolled three-phase bridge (51, 5n), a direct-current intermediate circuit (61, 6n), and a transistor unit (71, 7n) connected in series, and where, downline from the power supply modules (41, 4n) in the current flow direction, a common current-carrying line (31) leads to at least one electrode (21) of the melting unit (11) and away from at least one other electrode (22, 24).

摘要翻译： 本发明涉及一种方法和一种用于向电弧熔化单元提供电流的装置，用于熔化和加热金属，特别是钢，具有三相直流。 源，其将电流通过用于产生直流或交流的装置发送到突出到熔化单元的容器中的至少一个电极。 三相交流 源极（91）之后是至少两个并联连接的电源模块（41,4n），其中每个电源模块（41; 4n）具有不受控制的三相桥（51,5n），直流 中间电路（61,6n）和串联连接的晶体管单元（71,7n），并且其中，在电流流动方向上从电源模块（41,4n）下行的公共载流线（31） 导致熔化单元（11）的至少一个电极（21）并远离至少一个其它电极（22,24）。