JP2003025049A - Control unit for fluidity of molten metal - Google Patents
Control unit for fluidity of molten metalInfo
- Publication number
- JP2003025049A JP2003025049A JP2001208178A JP2001208178A JP2003025049A JP 2003025049 A JP2003025049 A JP 2003025049A JP 2001208178 A JP2001208178 A JP 2001208178A JP 2001208178 A JP2001208178 A JP 2001208178A JP 2003025049 A JP2003025049 A JP 2003025049A
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- terminal
- common bus
- mold
- side common
- winding
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はモールド内の溶融金
属の流動制御装置に係り、特に、隣接して配置された複
数のモールドに適用される溶融金属の流動制御装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten metal flow control device in a mold, and more particularly to a molten metal flow control device applied to a plurality of adjacently arranged molds.
【０００２】[0002]
【従来の技術】製鉄所において溶鋼からスラブを製造す
る連続鋳造装置においては、レードル内の溶鋼をダンデ
シュを介してモールド内に注入した後、モールドの底か
ら引き抜きロールで成形する。この場合、モールド内の
溶鋼に水平方向の温度分布が存在する場合には、スラブ
に表面割れやシェル破断が生じ易くなる。2. Description of the Related Art In a continuous casting apparatus for producing a slab from molten steel in an iron mill, molten steel in a ladle is poured into a mold through a dandesh, and then molded from a bottom of the mold by a roll. In this case, when the molten steel in the mold has a temperature distribution in the horizontal direction, the slab is likely to be surface-cracked or shell-ruptured.
【０００３】そこで、表面割れやシェル破断の発生を抑
制するためにモールド上方に電磁石を設置し、溶鋼表面
にモールド内循環力を発生させ、溶鋼をモールド内で循
環させることが提案されている。この電磁石はモールド
の周囲に設置されるため、モールドの交換等のために移
動する場合は電磁石も一緒に移動する必要がある。Therefore, in order to suppress the occurrence of surface cracks and shell breaks, it has been proposed to install an electromagnet above the mold to generate a circulating force in the mold on the surface of the molten steel and circulate the molten steel in the mold. Since this electromagnet is installed around the mold, it is necessary to move the electromagnet together when the mold is moved for replacement of the mold.
【０００４】一方、電磁石に電力を供給する電源は大規
模なシステムであり、移動することは困難である。そこ
で、電源と電磁石の間の接断を容易にするため、電源と
電磁石の間にはオートジョイント（ＡＪ）と呼ばれる接
続素子がモールド当たり２個設置されている。On the other hand, the power supply for supplying electric power to the electromagnet is a large-scale system and is difficult to move. Therefore, in order to facilitate connection and disconnection between the power source and the electromagnet, two connecting elements called an auto joint (AJ) are installed between the power source and the electromagnet per mold.
【０００５】そして、１つのタンディシュに対して複数
のモールドが隣接配置される場合には設置モールド台数
の２倍のＡＪを設置することが必要となる。図１は３台
のモールドが隣接配置される場合に適用される従来の結
線図であって、３台のモールド１１、１２及び１３が隣
接配置される。各モールド１１、１２及び１３の周囲に
は溶鋼駆動用の電磁石用コイル１１１、１２１、及び１
３１が設置されており、３つの独立した単相交流電源１
１２、１２２、及び１３２から電力の供給を受ける。When a plurality of molds are arranged adjacent to one tundish, it is necessary to install twice as many AJs as the number of installed molds. FIG. 1 is a conventional wiring diagram applied when three molds are arranged adjacent to each other, and three molds 11, 12 and 13 are arranged adjacent to each other. Around the respective molds 11, 12 and 13, electromagnet coils 111, 121 and 1 for driving molten steel are provided.
31 installed, 3 independent single-phase AC power supplies 1
Power is supplied from 12, 122, and 132.
【０００６】そして、各コイルと電源の間の接続線路に
は、各モールド当たり２つのＡＪ１１３、１２３、１３
３並びに１１４、１２４、１３４が設置されている。Then, in the connection line between each coil and the power source, two AJs 113, 123, 13 are provided for each mold.
3 and 114, 124, and 134 are installed.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、ＡＪは
電磁石用の大電力を確実に伝達するため定常的な保守が
必須であり、省力化及び稼働率向上の観点から設置台数
を低減することが望まれている。本発明は上記課題に鑑
みなされたものであって、並列に配置された複数のモー
ルドに適用した場合にもＡＪの設置台数を低減すること
のできる溶融金属の流動制御装置を提供することを目的
とする。However, the AJ requires constant maintenance in order to reliably transmit a large amount of electric power for the electromagnet, and it is desirable to reduce the number of installed units from the viewpoint of labor saving and improvement of operating rate. It is rare. The present invention has been made in view of the above problems, and an object thereof is to provide a molten metal flow control device capable of reducing the number of installed AJs even when applied to a plurality of molds arranged in parallel. And
【０００８】[0008]
【課題を解決するための手段】本発明に係る溶融金属の
流動制御装置は、各モールドの周囲に巻き始め端子から
巻き終わり端子に向かって同一方向に巻回されるｎ個の
電磁石用コイルと、ｎ個の電磁石用コイルのそれぞれに
予め定められた電圧かつ相互に予め定められた位相差を
有する電力を供給するｎ台の電源と、ｎ台の電源の一方
の端子を共通に接続する電源側共通バスと、モールド側
共通バスであってモールド側共通バスを流れる電流の時
間平均値が最小となるように選択された各モールドの巻
き始め端子又は巻き終わり端子の一方が接続されるモー
ルド側共通バスと、電源側共通バスとモールド側共通バ
スを電気的に接続する１つの共通オートジョイントと、
ｎ台の電源の他方の端子とモールドの巻き始め端子又は
巻き終わり端子のモールド側共通バスに接続されていな
い端子を電気的に接続するｎ個のオートジョイントと、
を具備する。A molten metal flow control apparatus according to the present invention includes n electromagnet coils wound around the respective molds in the same direction from a winding start terminal to a winding end terminal. , N power supplies for supplying power having a predetermined voltage and a mutually predetermined phase difference to each of the n electromagnet coils, and a power supply commonly connecting one terminal of the n power supplies. Side common bus and a mold side common bus connected to one of the winding start terminal or winding end terminal of each mold selected so that the time average value of the current flowing through the molding side common bus is minimized. A common bus and one common auto joint that electrically connects the common bus on the power supply side and the common bus on the mold side,
n auto-joints for electrically connecting the other terminal of the n power sources and the terminals not connected to the mold side common bus of the winding start terminal or winding end terminal of the mold,
It is equipped with.
【０００９】本発明にあっては、ｎ台のモールドと電源
は（ｎ＋１）個のオートジョイントで接続される。In the present invention, the n molds and the power source are connected by (n + 1) auto joints.
【００１０】[0010]
【発明の実施の形態】図２は本発明に係る溶融金属の流
動制御装置の構成図であって、３つのモールド１１、１
２及び１３が隣接して配置されており、各モールド１
１、１２及び１３の周囲には電磁石用コイル１１１、１
２１及び１３１が配置されている。そして、各電磁石用
コイル１１１、１２１及び１３１は独立した３つの電源
１１２、１２２及び１３２によって励磁され、各モール
ド１１、１２及び１３内の溶鋼に対して水平方向の循環
力を与える。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a block diagram of a molten metal flow control device according to the present invention.
2 and 13 are arranged adjacent to each other, and each mold 1
Electromagnetic coils 111, 1 around 1, 12, and 13
21 and 131 are arranged. Then, the electromagnet coils 111, 121 and 131 are excited by three independent power sources 112, 122 and 132, and apply a circulating force in the horizontal direction to the molten steel in the molds 11, 12 and 13.
【００１１】各コイル１１１、１２１及び１３１の一方
の端子１１１ａ、１２１ａ及び１３１ａはモールド側共
通バス１４１で共通に接続されるが、モールド側共通バ
ス１４１は共通ＡＪ１４２を介して電源側共通バス１４
３に接続される。そして、電源側共通バス１４３は３つ
の電源１１２、１２２及び１３２の一方の端子１１２
ａ、１２２ａ及び１３２ａに共通に接続されている。The terminals 111a, 121a and 131a of one of the coils 111, 121 and 131 are commonly connected by the mold side common bus 141, and the mold side common bus 141 is connected to the power source side common bus 14 via the common AJ142.
3 is connected. The common bus 143 on the power source side is one terminal 112 of the three power sources 112, 122 and 132.
a, 122a, and 132a are commonly connected.
【００１２】第１の電磁石用コイル１１１の他方の端子
１１１ｂは第１の電源１１２の他方の端子１１２ｂと第
１のＡＪ１１３を介して接続され、第２の電磁石用コイ
ル１２１の他方の端子１２１ｂは第２の電源１２２の他
方の端子１２２ｂと第２のＡＪ１２３を介して接続さ
れ、第３の電磁石用コイル１３１の他方の端子１３１ｂ
は第３の電源１３２の他方の端子１３２ｂと第３のＡＪ
１３３を介して接続される。The other terminal 111b of the first electromagnet coil 111 is connected to the other terminal 112b of the first power source 112 via the first AJ 113, and the other terminal 121b of the second electromagnet coil 121 is It is connected to the other terminal 122b of the second power source 122 via the second AJ 123, and the other terminal 131b of the third electromagnet coil 131.
Is the other terminal 132b of the third power source 132 and the third AJ
It is connected via 133.
【００１３】上記接続によれば、３台のモールドに対し
４個のＡＪを使用すればよく、従来の接続方法と比較し
てＡＪを２個削減することができる。これをｎ台のモー
ルドの場合に敷衍すると、共通バスを適用することによ
りｎ台のモールドに対してｎ＋１個のＡＪの使用で足
り、ｎ−１個のＡＪを低減することができる。According to the above connection, it is sufficient to use four AJs for three molds, and it is possible to reduce two AJs as compared with the conventional connection method. If this is applied to the case of n molds, by using a common bus, it is sufficient to use n + 1 AJs for n molds, and it is possible to reduce n-1 AJs.
【００１４】なお、各モールドの電磁石用コイルのａ端
子及びｂ端子のいずれを共通バス１４１に接続するか
は、共通バス１４１及び１４３を流れる電流が最小にな
るように決定されるので、図２は接続回路の一例を示し
ているにすぎない。即ち、同一方向に巻回された電磁石
用コイルを有するＮ台のモールドが隣接設置される場合
は［数２］で表される共通バスに流れる１周期の平均電
流Ｉcom が最小になるように、各モールドごとに共通バ
スに接続する端子をａ側かｂ側かを決定する。なお、電
磁石用コイルの巻き始め端子をａ端子、巻き終わり端子
をｂ端子とする。It should be noted that which of the terminals a and b of the electromagnet coil of each mold is connected to the common bus 141 is determined so that the current flowing through the common buses 141 and 143 is minimized. Shows only an example of the connection circuit. That is, when N molds having electromagnet coils wound in the same direction are installed adjacent to each other, one cycle of the average current I com flowing through the common bus represented by [Equation 2] is minimized. , For each mold, determine whether the terminal connected to the common bus is a side or b side. The winding start terminal of the electromagnet coil is a terminal and the winding end terminal is b terminal.
【００１５】[0015]
【数２】 [Equation 2]
【００１６】例えば、全てのモールドの電磁石用コイル
の励磁電流が同振幅同位相である場合は、各モールドの
ａ端子及びｂ端子を流れる電流は［数３］で表される。For example, when the exciting currents of the electromagnet coils of all the molds have the same amplitude and the same phase, the currents flowing through the terminals a and b of each mold are represented by [Equation 3].
【００１７】[0017]
【数３】 [Equation 3]
【００１８】図３は３個のモールドの電磁石用コイルを
同振幅同位相の電流で励磁した場合の接続図であって、
第１及び３モールド１１及び１３の電磁石用コイルのａ
端子１１１ａ及び１３１ａと第２モールド１２の電磁石
用コイルのｂ端子１２１ｂをモールド側共通バス１４１
に接続する。このように接続すれば、第１モールド１１
の電磁石用コイルのａ端子を流れる電流Ｉ1a（ｔ）と、
それに隣接する第２モールドのｂ端子流れる電流Ｉ
2b（ｔ）の和は常に零となる、即ち［数４］が成立する
ので、共通バスを流れる電流は第３モールド１３の電磁
石用コイルのａ端子を流れる電流Ｉ3a（ｔ）に等しくな
り最小となる。FIG. 3 is a connection diagram of three molded electromagnet coils excited by currents of the same amplitude and phase.
A of coil for electromagnet of first and third molds 11 and 13
The terminals 111a and 131a and the b terminal 121b of the electromagnet coil of the second mold 12 are connected to the mold side common bus 141.
Connect to. With this connection, the first mold 11
Current I 1a (t) flowing through the a terminal of the electromagnet coil of
The current I flowing through the b terminal of the second mold adjacent to it
Since the sum of 2b (t) is always zero, that is, [Equation 4] is established, the current flowing through the common bus becomes equal to the current I 3a (t) flowing through the a terminal of the electromagnet coil of the third mold 13. It is the smallest.
【００１９】[0019]
【数４】 [Equation 4]
【００２０】次に、各モールドの電磁石用コイルを流れ
る電流が同振幅であり、位相が３６０°／ｎに設定され
る場合は以下のようになる。この場合は各モールドのａ
端子及びｂ端子を流れる電流は［数５］で表される。Next, when the currents flowing through the electromagnet coils of the respective molds have the same amplitude and the phase is set to 360 ° / n, the following is performed. In this case, a of each mold
The current flowing through the terminal and the b terminal is represented by [Equation 5].
【００２１】[0021]
【数５】 [Equation 5]
【００２２】この場合は［数６］が成立するので、図２
に示すように各モールドのａ端子を共通バスに接続すれ
ば共通バスを流れる電流は零で最小となる。In this case, since [Equation 6] is established, FIG.
If the a terminal of each mold is connected to the common bus as shown in (3), the current flowing through the common bus is zero and the minimum.
【００２３】[0023]
【数６】 [Equation 6]
【００２４】さらに、隣接するモールドの電磁石用コイ
ルを相互に１８０°の位相差を有する同振幅の電流で励
磁した場合は、ｎ番目のモールドの電磁石用コイルのａ
端子を流れる電流Ｉna（ｔ）及びｎ＋１番目のモールド
の電磁石用コイルのａ端子を流れる電流Ｉn+1a（ｔ）は
［数７］で表される。Further, when the electromagnet coils of the adjacent molds are excited by currents of the same amplitude having a phase difference of 180 ° from each other, a of the electromagnet coil of the nth mold is excited.
The current I na (t) flowing through the terminal and the current I n + 1a (t) flowing through the a terminal of the electromagnet coil of the (n + 1) th mold are represented by [Equation 7].
【００２５】[0025]
【数７】 [Equation 7]
【００２６】従って、［数８］が成立するので隣接する
モールドのａ端子同士を接続すれば、モールド側共通バ
ス１４１を流れる電流は最小となる。Therefore, since [Equation 8] is established, the current flowing through the mold side common bus 141 is minimized by connecting the a terminals of the adjacent molds.
【００２７】[0027]
【数８】 [Equation 8]
【００２８】[0028]
【発明の効果】本発明に係る溶融金属の流動制御装置に
よれば、ｎ台のモールドと電源を（ｎ＋１）個のオート
ジョイントによって接続することが可能となり、オート
ジョイント数を低減することができる。According to the molten metal flow control device of the present invention, it is possible to connect the n molds and the power source by (n + 1) auto joints, thereby reducing the number of auto joints. .
【図１】従来の結線図である。FIG. 1 is a conventional wiring diagram.
【図２】本発明に係る溶融金属の流動制御装置の構成図
である。FIG. 2 is a configuration diagram of a molten metal flow control device according to the present invention.
【図３】全てのモールドの電磁石用コイルを同振幅同位
相の電流で励磁した場合の接続図である。FIG. 3 is a connection diagram when all electromagnet coils of a mold are excited by currents of the same amplitude and the same phase.
１１、１２、１３…モールド １１１、１２１、１３１…電磁石用コイル １１２、１２２、１３２…電源 １１３、１２３、１３３…オートジョイント １４１…モールド側共通バス １４２…共通オートジョイント １４３…電源側共通バス 11, 12, 13 ... Mold 111, 121, 131 ... Electromagnetic coil 112, 122, 132 ... Power supply 113, 123, 133 ... Auto joint 141 ... Mold side common bus 142 ... Common auto joint 143 ... Common bus on power supply side
Claims (2)
って各モールドの周囲に同一方向に巻回されるｎ個（ｎ
＝２，３・・・Ｎ）の電磁石用コイルと、 前記ｎ個の電磁石用コイルのそれぞれに予め定められた
電圧かつ相互に予め定められた位相差を有する電力を供
給するｎ台の電源と、 前記ｎ台の電源の一方の端子を共通に接続する電源側共
通バスと、 モールド側共通バスであって、そこを流れる電流の時間
平均値が最小となるように選択された各モールドの前記
巻き始め端子又は巻き終わり端子の一方が接続されるモ
ールド側共通バスと、 前記電源側共通バスと前記モールド側共通バスを電気的
に接続する１つの共通オートジョイントと、 前記ｎ台の電源の他方の端子と、前記モールドの巻き始
め端子又は巻き終わり端子の前記モールド側共通バスに
接続されていない端子を電気的に接続するｎ個のオート
ジョイントと、を具備する溶融金属の流動制御装置。1. n pieces (n) wound in the same direction around each mold from a winding start terminal to a winding end terminal.
= 2, 3 ... N), and n power sources for supplying electric power having a predetermined voltage and a mutually predetermined phase difference to each of the n electromagnet coils. A power source side common bus that commonly connects one terminal of the n power sources, and a mold side common bus, wherein each mold is selected so that the time average value of the current flowing therethrough is minimized. A mold side common bus to which one of a winding start terminal or a winding end terminal is connected, one common autojoint electrically connecting the power source side common bus and the mold side common bus, and the other of the n power sources Of the molten metal, and n auto-joints for electrically connecting terminals of the winding start terminal or winding end terminal of the mold that are not connected to the mold side common bus. Motion control device.
って各モールドの周囲に同一方向に巻回されるｎ個（ｎ
＝２，３・・・Ｎ）の電磁石用コイルと、 前記ｎ個の電磁石用コイルのそれぞれに同電圧かつ相互
に予め定められた位相差を有する電力を供給するｎ台の
電源と、 前記ｎ台の電源の一方の端子を共通に接続する電源側共
通バスと、 前記ｎ個の電磁石用コイルの各々の巻き始め端子（ａ）
又は巻き終わり端子（ｂ）から電磁石用コイルに流入す
る方向を正としたときに、［数１］で定義される平均電
流（Ｉcom ）が最小となるように前記電磁石用コイル毎
に選択された巻き始め端子（ａ）又は巻き終わり端子
（ｂ）の一方が接続されるモールド側共通バスと、 前記電源側共通バスと前記モールド側共通バスを電気的
に接続する１つの共通オートジョイントと、 前記ｎ台の電源の他方の端子と、前記モールドの巻き始
め端子又は巻き終わり端子の前記モールド側共通バスに
接続されていない端子を電気的に接続するｎ個のオート
ジョイントと、を具備する溶融金属の流動制御装置。 【数１】 2. n pieces (n) wound in the same direction around each mold from a winding start terminal to a winding end terminal.
= 2,3 ... N), n power supplies for supplying electric power having the same voltage and a mutually predetermined phase difference to each of the n electromagnet coils, and n. Power source side common bus for commonly connecting one terminal of the power source of the stand, and winding start terminal (a) of each of the n electromagnet coils
Alternatively, each of the electromagnet coils is selected so that the average current (I com ) defined by [Equation 1] is minimized when the direction in which the winding end terminal (b) flows into the electromagnet coil is positive. A mold side common bus to which one of the winding start terminal (a) or the winding end terminal (b) is connected, and one common autojoint that electrically connects the power source side common bus and the mold side common bus, Melting, comprising: the other terminal of the n power supplies; and n auto joints that electrically connect the winding start terminal or the winding end terminal of the mold, which is not connected to the mold side common bus. Metal flow control device. [Equation 1]
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| JP2001208178A JP4648584B2 (en) | 2001-07-09 | 2001-07-09 | Molten metal flow control device |
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| JP4648584B2 JP4648584B2 (en) | 2011-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09135563A (en) * | 1995-11-08 | 1997-05-20 | Nippon Steel Corp | Rotating field generator and continuous casting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09135563A (en) * | 1995-11-08 | 1997-05-20 | Nippon Steel Corp | Rotating field generator and continuous casting machine |
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