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    PULSE WIDTH MODULATED POWER INVERTER OUTPUT CONTROL
    2.
    发明申请
    PULSE WIDTH MODULATED POWER INVERTER OUTPUT CONTROL 审中-公开
    脉宽调制电源逆变器输出控制

    公开(公告)号：WO2007025173A2

    公开(公告)日：2007-03-01

    申请号：PCT/US2006/033290

    申请日：2006-08-25

    Applicant: CONSARC CORPORATION ,  KEOUGH, Graham A.

    Inventor： KEOUGH, Graham A.

    IPC: H05B3/60

    CPC classification number: H05B6/067 ,  H02M2001/0054 ,  H02M2007/53878 ,  Y02B70/1491

    Abstract: A method is provided for output control of a pulse width modulated power inverter used with a substantially resistive, single phase, ac load such as an electro-slag remelting furnace. In one application of the method, during each of the inverter's half cycle outputs, active switching devices are alternatively pulsed on and off during the half cycle so that only half of the switching transients in the half cycle are handled by one of the active switching devices.

    Abstract translation: 提供了一种用于与诸如电渣重熔炉的基本上电阻的单相交流负载一起使用的脉宽调制功率逆变器的输出控制的方法。 在该方法的一个应用中，在每个逆变器的半周期输出期间，有源开关器件在半周期期间交替地脉冲接通和断开，使得半周期中仅一半的开关瞬变由有源开关器件中的一个处理

    COLD CRUCIBLE INDUCTION FURNACE WITH EDDY CURRENT DAMPING
    3.
    发明申请
    COLD CRUCIBLE INDUCTION FURNACE WITH EDDY CURRENT DAMPING 审中-公开
    具有EDDY电流阻尼的冷致电感炉

    公开(公告)号：WO2005072207A3

    公开(公告)日：2006-08-03

    申请号：PCT/US2005001678

    申请日：2005-01-14

    Applicant: CONSARC CORP ,  ROBERTS RAYMOND J ,  KEOUGH GRAHAM A

    Inventor： ROBERTS RAYMOND J ,  KEOUGH GRAHAM A

    IPC: F27D7/06 ,  F27D3/00 ,  H05B6/06 ,  H05B6/22 ,  H05B6/24 ,  H05B6/34

    CPC classification number: F27B14/14 ,  F27B14/063 ,  F27D11/06 ,  H05B6/24

    Abstract: Apparatus and method are provided for damping the induced fluid flow, particularly in the region of the base plate (14), in an electrically conductive material that is heated and melted in a cold crucible induction furnace (10). Damping is accomplished by establishing a dc magnetic field (99)such that flow of the electrically conductive liquid metal in that dc magnetic field (99) would induce eddy currents in the liquid metal (93) which would generate forces that tend to oppose the flow. The dc magnetic field (99) may be established by dc current flow in the ac induction coil (68) that induces current in the material, dc current flow in a separate dc coil (73, 75), or coils, constructed to prevent excessive induced losses, by discrete magnets, or a combination of any of the three prior methods.

    Abstract translation: 提供了一种设备和方法，其特征在于在冷坩埚感应炉（10）中被加热和熔化的导电材料中，特别是在基板（14）的区域中阻尼引起的流体流动。 通过建立直流磁场（99）来实现阻尼，使得在该直流磁场（99）中的导电液体金属的流动将在液态金属（93）中引起涡流，这将产生倾向于与流动相反的力 。 直流磁场（99）可以通过交流感应线圈（68）中的直流电流来建立，其感应材料中的电流，直流电流在单独的直流线圈（73,75）或线圈中流动，构造成防止过量 由分立磁体引起的损耗，或三种现有方法中任何一种的组合。

    COLD CRUCIBLE INDUCTION FURNACE
    5.
    发明申请
    COLD CRUCIBLE INDUCTION FURNACE 审中-公开

    公开(公告)号：WO2005072167A3

    公开(公告)日：2005-08-11

    申请号：PCT/US2005/001433

    申请日：2005-01-14

    Applicant: CONSARC CORP. ,  KEOUGH, Graham, A.

    Inventor： KEOUGH, Graham, A.

    IPC: F27D7/06 ,  F27D3/00 ,  H05B6/06 ,  H05B6/34 ,  H05B6/22

    Abstract: A cold crucible induction furnace (10) has a slotted-wall (12) with a slotted inner annular protrusion (11) that is disposed around the base (14) of the crucible's melting chamber. The protrusions (11) may be separated from the base (14) by a gap (18) that can be filled with an electrical insulating material. Slots may also be provided in the protrusions (11) and/or the outer perimeter of the base (14).

    PULSE WIDTH MODULATED POWER INVERTER OUTPUT CONTROL
    6.
    发明申请
    PULSE WIDTH MODULATED POWER INVERTER OUTPUT CONTROL 审中-公开
    脉宽调制电力逆变器输出控制

    公开(公告)号：WO2007025173A3

    公开(公告)日：2007-10-11

    申请号：PCT/US2006033290

    申请日：2006-08-25

    Applicant: CONSARC CORP ,  KEOUGH GRAHAM A

    Inventor： KEOUGH GRAHAM A

    IPC: H02P5/00 ,  H02M1/00 ,  H02M7/5387

    CPC classification number: H05B6/067 ,  H02M2001/0054 ,  H02M2007/53878 ,  Y02B70/1491

    Abstract: A method is provided for output control of a pulse width modulated power inverter used with a substantially resistive, single phase, ac load such as an electro-slag remelting furnace. In one application of the method, during each of the inverter's half cycle outputs, active switching devices are alternatively pulsed on and off during the half cycle so that only half of the switching transients in the half cycle are handled by one of the active switching devices.

    Abstract translation: 提供了一种用于输出控制的脉冲宽度调制功率逆变器的方法，所述逆变器与基本上电阻的单相交流负载（例如电渣重熔炉）一起使用。 在该方法的一个应用中，在每个逆变器的半周期输出期间，在半周期期间有源开关器件交替脉冲地导通和关断，使得半周期中仅一半的开关瞬变由一个有源开关器件 。

    COLD CRUCIBLE INDUCTION FURNACE WITH EDDY CURRENT DAMPING
    7.
    发明申请
    COLD CRUCIBLE INDUCTION FURNACE WITH EDDY CURRENT DAMPING 审中-公开
    具有EDDY电流阻尼的冷致电感炉

    公开(公告)号：WO2005072207A2

    公开(公告)日：2005-08-11

    申请号：PCT/US2005/001678

    申请日：2005-01-14

    Applicant: CONSARC CORP. ,  ROBERTS, Raymond J. ,  KEOUGH, Graham A.

    Inventor： ROBERTS, Raymond J. ,  KEOUGH, Graham A.

    IPC: F27D3/00 ,  H05B6/06 ,  H05B6/24

    CPC classification number: F27B14/14 ,  F27B14/063 ,  F27D11/06 ,  H05B6/24

    Abstract: Apparatus and method are provided for damping the induced fluid flow, particularly in the region of the base plate, in an electrically conductive material that is heated and melted in a cold crucible induction furnace. Damping is accomplished by establishing a dc magnetic field such that flow of the electrically conductive liquid metal in that dc magnetic field would induce eddy currents in the liquid metal which would generate forces that tend to oppose the flow. The dc magnetic field may be established by dc current flow in the ac induction coil that induces current in the material, dc current flow in a separate dc coil, or coils, constructed to prevent excessive induced losses, by discrete magnets, or a combination of any of the three prior methods. The dc magnetic field may also be established by dc current flow in one or more dc coils disposed around a magnetic pole piece located below the base of the furnace. One end of the magnetic pole piece is located adjacent to the bottom of the crucible base, so that the pole piece concentrates the dc field into the lower portion of the molten electrically conductive material.

    Abstract translation: 提供了一种设备和方法，用于在冷坩埚感应炉中加热和熔化的导电材料中阻尼诱发的流体流动，特别是在基板的区域中。 通过建立直流磁场来实现阻尼，使得在该直流磁场中的导电液体金属的流动将导致液态金属中的涡流，其将产生趋向于与流动相反的力。 直流磁场可以通过交流感应线圈中的直流电流来建立，该感应线圈在材料中引起电流，直流电流在单独的直流线圈中流动，或者通过分立的磁体来构造以防止过度的感应损耗，或组合 以前的三种方法中的任何一种。 直流磁场也可以通过设置在位于炉底部的磁极片周围的一个或多个直流线圈中的直流电流来建立。 磁极片的一端位于坩埚底部的底部附近，使得极片将直流场集中到熔融导电材料的下部。

    COLD CRUCIBLE INDUCTION FURNACE
    8.
    发明申请
    COLD CRUCIBLE INDUCTION FURNACE 审中-公开
    冷冻感应炉

    公开(公告)号：WO2005072167A2

    公开(公告)日：2005-08-11

    申请号：PCT/US2005001433

    申请日：2005-01-14

    Applicant: CONSARC CORP ,  KEOUGH GRAHAM A

    Inventor： KEOUGH GRAHAM A

    IPC: H05B6/22 ,  H05B6/24

    CPC classification number: H05B6/24 ,  F27B14/063 ,  F27B14/14

    Abstract: A cold crucible induction furnace has a slotted-wall with a slotted inner annular protrusion that is disposed around the base of the crucible's melting chamber. The protrusions may be separated from the base by a gap that can be filled with an electrical insulating material. Slots may also be provided in the protrusions and/or the outer perimeter of the base.

    Abstract translation: 冷坩埚感应炉具有开槽壁，该开槽壁设置在坩埚熔化室的底部周围的开槽内环形突起。 突起可以通过可以用电绝缘材料填充的间隙与基部分离。 槽也可以设置在基座的突起和/或外周中。

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