JP3570601B2 - Electromagnetic stirrer - Google Patents

Electromagnetic stirrer Download PDF

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JP3570601B2
JP3570601B2 JP05410797A JP5410797A JP3570601B2 JP 3570601 B2 JP3570601 B2 JP 3570601B2 JP 05410797 A JP05410797 A JP 05410797A JP 5410797 A JP5410797 A JP 5410797A JP 3570601 B2 JP3570601 B2 JP 3570601B2
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magnetic pole
phase
pole core
adjacent
mold
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JPH10230349A (en
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功 中川
良市 末永
裕 渕上
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、連続鋳造設備で使用する電磁攪拌装置に関する。
【０００２】
【従来の技術】
従来、溶融金属の連続鋳造を行う場合、電磁攪拌装置の内部に設けた鋳型内金属に低周波電磁場を印加することにより回転運動を生じさせ、鋳片製品の品質向上を図るようにした３相突極型電磁攪拌装置が提案されている（例えば、特開昭５３−２５２３５号公報）。
図５は従来の電磁攪拌装置を示す縦方向断面図である。図において、１は磁気閉回路を形成する円筒状のヨーク、２はヨーク１の後述する磁極鉄心に装着されたコイルである。３はヨーク１とコイル２を格納するとともにヨ−ク１とコイル２に冷却水を流す水路を兼ねたフレ−ム、３１、３２はフレ−ム３に設けた水路の冷却水入口、同出口、４はヨ−ク１の軸心近傍に配置され溶融金属を流す鋳型、５は溶融金属、６は鋳型４の冷却水用水路、６１、６２は鋳型冷却水の入口、同出口である。このような構成において、コイル２にＵ相、Ｖ相、Ｗ相の３相電源を接続して交流電流を流し、磁極間中心に３相回転磁界を発生させることにより、鋳型４内にある溶融金属５に撹拌力を与え、介在物の浮上による鋳片表面形状の改善もしくは鋳片表層部の気泡の浮上による未脱酸鋼の連鋳化、または鋳片等軸晶の向上および中心偏析の低減による鋳片内部品質の改善等に大きな効果があることが知られている。
次に電磁攪拌装置の磁極およびコイルの配置を説明する。図６は図５のＡＡ’線に沿う横方向断面図である。ヨーク１の内周面上に沿って突出した複数の磁極鉄心１１〜１６が６０°ピッチで配置され、磁極鉄心１１〜１６を取り囲むようにそれぞれコイル２１〜２６が装着されている。
第１の磁極鉄心１１に装着するコイル２１をＵ相とし、第３の磁極鉄心１３に装着するコイル２３をＶ相とし、第５の磁極鉄心１５に装着するコイル２５をＷ相とし、それぞれＮ極となるように３相交流を流し、これらのコイルを装着した磁極鉄心１１、１３、１５とヨ−ク１の軸心を隔てて対向した位置にある磁極鉄心１４、１６、１２には、これらと同相のコイルを装着し、それぞれＳ極となるように３相交流を流し、磁極間中心に３相回転磁界を発生させることにより、中心近傍に配置させた鋳型４内の溶融金属５に回転力Ｆｒ を付与させている。
【０００３】
【発明が解決しようとする課題】
ところが、従来技術では磁極幅ｌｐ が狭いため、磁極から出た磁束ΦＵ 、ΦＶ 、ΦＷ の減衰が大きく、溶融金属５の回転力を大きくするために多大なアンペアターン（電流とコイルターン数の積）を要することになり、装置が大掛かりになるばかりか、制約寸法が厳しい設備には、取り付けることができないという問題があった。
そこで、本発明は、多大なアンペアターンを要することなく溶融金属の回転力を大きくする巻線を有した小型の電磁攪拌装置を提供することを目的とする。
【０００４】
【課題を解決するための手段】
上記問題を解決するため、本発明は次のような構成にしたものである。
（１） 溶融金属を流す鋳型の周囲に設けられるとともにその内周面上に沿って等ピッチで配置され突出した複数の磁極鉄心を有するヨークと、前記磁極鉄心を取り囲むように装着されたコイルからなり、回転磁界を発生させる電磁攪拌装置において、前記磁極鉄心に装着されたコイルは、３相交流を流すことにより前記磁極鉄心の根元側と前記磁極鉄心の鋳型側とが互いに異なる極性を有する二つの積重ね体からなり、第１の磁極鉄心およびこれと隣り合う第２の磁極鉄心の根元側に装着するコイルがＵ相であり、第３の磁極鉄心およびこれと隣り合う第４の磁極鉄心の根元側に装着するコイルがＶ相であり、第５の磁極鉄心およびこれと隣り合う第６の磁極鉄心の根元側に装着するコイルがＷ相であり、前記隣り合う磁極鉄心の根元側に装着されたコイルは、前記ヨ−クの軸心を隔てて対向した位置にある隣り合う磁極鉄心の鋳型側のコイルと同相としたものである。
（２） 請求項１に記載の電磁攪拌装置において、前記隣り合う同相とした磁極鉄心の根元側に巻回されたコイル同志および前記隣り合う同相とした磁極鉄心の鋳型側に巻回されたコイル同志を接続して一体化したものである。
（３） 溶融金属を流す鋳型の周囲に設けられるとともにその内周面上に沿って不等ピッチで配置され突出した複数の磁極鉄心を有するヨークと、前記磁極鉄心を取り囲むように装着されたコイルからなり、回転磁界を発生させる電磁攪拌装置において、前記磁極鉄心に装着されたコイルは、３相交流を流すことにより前記磁極鉄心の根元側と前記磁極鉄心の鋳型側とが互いに異なる極性を有する二つの積重ね体からなり、第１の磁極鉄心およびこれと隣り合う第２の磁極鉄心の根元側に装着するコイルがＵ相であり、第３の磁極鉄心およびこれと隣り合う第４の磁極鉄心の根元側に装着するコイルがＶ相であり、第５の磁極鉄心およびこれと隣り合う第６の磁極鉄心の根元側に装着するコイルがＷ相であり、前記隣り合う磁極鉄心の根元側に装着されたコイルは、前記ヨ−クの軸心を隔てて対向した位置にある隣り合う磁極鉄心の鋳型側のコイルと同相としたものである。
（４） 請求項３に記載の電磁攪拌装置において、前記隣り合う同相とした磁極鉄心の根元側に巻回されたコイル同志および前記隣り合う同相とした磁極鉄心の鋳型側に巻回されたコイル同志を接続して一体化したものである。
【０００５】
【発明の実施の形態】
以下、本発明の実施例を図に基づいて説明する。従来例と同じ構成要素については同一符号を付し、従来例と異なる要素には新たな符号を付して説明を施す。図１は本発明の第１の実施例を示す電磁攪拌装置の横方向断面図である。図において、複数の磁極鉄心１１〜１６は６０°の等ピッチでヨークに配置されており、２１１、２１２、２２１、２２２、２３１、２３２、２４１、２４２、２５１、２５２、２６１、２６２は各磁極鉄心１１〜１６に装着されたコイルである。第１の磁極鉄心１１の根元側とこれと隣り合う第２の磁極鉄心１２の根元側に装着するコイル２１１、２２１をＵ相とし、第３の磁極鉄心１３の根元側とこれと隣り合う第４の磁極鉄心１４の根元側に装着するコイル２３１、２４１をＶ相とし、第５の磁極鉄心１５の根元側とこれと隣り合う第６の磁極鉄心１６の根元側に装着するコイル２５１、２６１をＷ相とし、それぞれＮ極となるように３相交流を流し、一方、各々の磁極鉄心の鋳型４側に装着されるコイル２１２、２２２、２３２、２４２、２５２、２６２は、ヨ−ク１の軸心を隔てて対向した位置にある磁極鉄心の根元側に装着されたコイルと同相とし、それぞれＳ極となるように３相交流を流すと、各相のＮ極の磁極鉄心からＳ極の磁極鉄心へ向かう方向に生じる磁束Φｕ 、Φｖ 、Φｗ が鋳型４内の溶融金属５を通過し磁極間中心に３相回転磁界が発生する。これにより磁界の回転方向と同一方向に回転力が発生し、ヨ−ク１の軸心近傍に配置された鋳型４内の溶融金属５が攪拌される。
なお、本実施例ではヨ−ク１における磁極鉄心１１〜１６の配置を等ピッチとしたが、これに限定されず不等ピッチとしたものでも良い。例えば、これらの磁極鉄心の中で互いに隣り合う二つの磁極鉄心１１と１２の間のピッチをそれ以外の互いに隣り合う他の磁極鉄心の間の間隔より大きくする。
【０００６】
次に、本発明の第２の実施例を説明する。図２は第２の実施例を示す電磁攪拌装置の横方向断面図である。図において、第１の実施例と異なる点は、隣り合う同相とした磁極鉄心の根元側に巻回されたコイル同志を接続して一体化し、また、隣り合う同相とした磁極鉄心の鋳型側に巻回されたコイル同志を接続して一体化したものである。すなわち、コイル２７１と２８２がＵ相、コイル２８１と２９２がＶ相となり、コイル２９１と２７２がＷ相となる。
このような構成において、磁極鉄心の根元側に巻回されたコイルがＮ極、鋳型側に巻回されたコイルがＳ極となるように３相交流を流すと、各相のＮ極の磁極鉄心からＳ極の磁極鉄心へ向かう方向に生じる磁束Φｕ 、Φｖ 、Φｗ が鋳型４内の溶融金属５を貫通し磁極間中心に３相回転磁界が発生する。これにより磁界の回転方向と同一方向に回転力が発生し、ヨ−ク１の軸心近傍に配置された鋳型４内の溶融金属５が攪拌される。
【０００７】
次に、本発明の第１の実施例に記載された構成の電磁攪拌装置を実際に製作し、装置の内部に鋳型を設けていない状態での磁束密度を計測した。図３は電磁攪拌装置の磁極鉄心間のギャップにおける磁束密度の大きさの円周方向分布を示しており、従来の装置と同一アンペアタ−ン数で比較したものである。これより磁束密度は従来のものと比較して２倍大きいことを確認した。したがって、本発明では、従来と同等の磁束密度を発生させるために必要なアンペアタ−ン数を従来の半分にすることができ、従来よりも磁極鉄心からでる磁極の減衰を抑えることができる。
図４は本電磁攪拌装置の軸心近傍に配置させた鋳型内における溶融金属の流速の大きさを示したものであり、これより溶融金属の流速は従来技術と比べて２倍鷹いことを確認した。したがって、本発明では、従来と同等の流速を得るために必要なアンペアタ−ン数を従来の半分にすることができ、従来よりも電磁攪拌装置のサイズをより小型にすることができる。
なお、上記に述べた特性は第２の実施例に記載された構成の電磁攪拌装置でも同じ効果が得られることを確認した。
【０００８】
【発明の効果】
以上述べたように、本発明によれば、従来技術の半分のアンペアターン数で中心近傍に配置させた溶融金属に回転力を付与することができるため、装置自体をコンパクト化することが可能となるとともに、寸法制約が厳しい設備にも十分対応できる高信頼性の電磁攪拌装置を得る効果がある。
【図面の簡単な説明】
【図１】本発明の第１の実施例を示す電磁攪拌装置の横方向断面図である。
【図２】本発明の第２の実施例を示す同装置の横方向断面図である。
【図３】電磁攪拌装置の磁極鉄心間のギャップにおける磁束密度の円周方向分布を示す図である。
【図４】電磁攪拌装置の中心近傍に配置させた鋳型内における溶融金属の流速の大きさを示す図である。
【図５】従来例を示す電磁攪拌装置の縦方向断面図である。
【図６】図５のＡＡ’線に沿う横方向断面図である。
【符号の説明】
１：ヨ−ク
１１〜１６：磁極鉄心
２１１、２１２、２２１、２２２、２３１、
２３２、２４１、２４２、２５１、２５２、
２６１、２６２，２７１，２７２，２８１，
２８２，２９１，２９２：コイル
４：鋳型
５：溶融金属、
Ｆｒ ：回転力
ｌｐ ：磁極幅
ΦＵ 、ΦＶ 、ΦＷ ：磁束[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electromagnetic stirring device used in a continuous casting facility.
[0002]
[Prior art]
Conventionally, when performing continuous casting of molten metal, a low-frequency electromagnetic field is applied to metal in a mold provided inside an electromagnetic stirrer to generate rotational motion, thereby improving the quality of a slab product. A salient pole type electromagnetic stirrer has been proposed (for example, JP-A-53-25235).
FIG. 5 is a longitudinal sectional view showing a conventional electromagnetic stirring device. In the figure, 1 is a cylindrical yoke forming a magnetic closed circuit, and 2 is a coil mounted on a magnetic pole core of the yoke 1 to be described later. Numeral 3 denotes a frame which stores the yoke 1 and the coil 2 and also serves as a channel for flowing cooling water to the yoke 1 and the coil 2. Numerals 31 and 32 denote cooling water inlets and outlets of channels provided in the frame 3. Reference numeral 4 denotes a mold arranged near the axis of the yoke 1 to flow molten metal, 5 denotes molten metal, 6 denotes a cooling water channel of the mold 4, and 61 and 62 denote inlets and outlets of mold cooling water. In such a configuration, a three-phase power supply of U-phase, V-phase, and W-phase is connected to the coil 2 to flow an alternating current to generate a three-phase rotating magnetic field at the center between the magnetic poles. A stirring force is applied to the metal 5 to improve the surface shape of the slab due to the floating of inclusions or to continuously cast undeoxidized steel by floating bubbles in the surface layer of the slab, or to improve the equiaxed crystal and the segregation of the center of the slab. It is known that the reduction has a great effect in improving the internal quality of the slab and the like.
Next, the arrangement of the magnetic poles and coils of the electromagnetic stirrer will be described. FIG. 6 is a cross-sectional view taken along the line AA ′ in FIG. A plurality of magnetic pole cores 11 to 16 protruding along the inner peripheral surface of the yoke 1 are arranged at a pitch of 60 °, and coils 21 to 26 are mounted so as to surround the magnetic pole cores 11 to 16, respectively.
The coil 21 mounted on the first magnetic pole core 11 is U-phase, the coil 23 mounted on the third magnetic pole core 13 is V-phase, and the coil 25 mounted on the fifth magnetic pole core 15 is W-phase. A three-phase alternating current is passed so as to be a pole, and the magnetic pole irons 14, 16, 12 which are opposed to the magnetic pole irons 11, 13, 15 mounted with these coils across the axis of the yoke 1, A coil having the same phase as these is mounted, and a three-phase alternating current is applied so as to be an S pole, and a three-phase rotating magnetic field is generated at the center between the magnetic poles, so that the molten metal 5 in the mold 4 arranged near the center is formed. a rotational force F r is made to grant.
[0003]
[Problems to be solved by the invention]
However, since a narrow pole width l p in the prior art, the magnetic flux [Phi U exiting from the pole, [Phi V, [Phi W attenuation is large, and considerable ampere turns (current in order to increase the rotational force of the molten metal 5 coils (The product of the number of turns)), which not only increases the size of the device, but also makes it impossible to mount the device on equipment having strictly restricted dimensions.
Therefore, an object of the present invention is to provide a small electromagnetic stirrer having a winding that increases the rotational force of a molten metal without requiring a large ampere turn.
[0004]
[Means for Solving the Problems]
In order to solve the above problem, the present invention has the following configuration.
(1) A yoke which is provided around a casting mold for flowing molten metal and has a plurality of magnetic pole cores which are arranged at an equal pitch along the inner peripheral surface thereof and has a plurality of magnetic pole cores, and a coil mounted so as to surround the magnetic pole cores In the electromagnetic stirrer for generating a rotating magnetic field, the coil mounted on the magnetic pole core has a different polarity between the base side of the magnetic pole core and the mold side of the magnetic core by flowing three-phase alternating current. The coil mounted on the base side of the first magnetic pole core and the second magnetic pole core adjacent to the first magnetic pole core is U-phase, and the third magnetic pole core and the fourth magnetic pole core adjacent thereto have the same structure. The coil mounted on the base side is the V phase, and the coil mounted on the base side of the fifth magnetic pole core and the adjacent sixth magnetic pole core is the W phase, and mounted on the base side of the adjacent magnetic pole core. The attached coil has the same phase as that of the coil on the mold side of the adjacent magnetic pole core located at a position opposed to the yoke axis.
(2) The electromagnetic stirrer according to claim 1, wherein the coils wound on the base side of the adjacent in-phase magnetic pole cores and the coils wound on the mold side of the adjacent in-phase magnetic pole cores. They are connected and integrated.
(3) A yoke having a plurality of magnetic pole cores provided around the casting mold through which the molten metal flows and arranged at irregular pitches along the inner peripheral surface thereof, and a coil mounted so as to surround the magnetic pole cores In the electromagnetic stirrer for generating a rotating magnetic field, the coil mounted on the magnetic pole iron has different polarities at the base side of the magnetic pole core and the mold side of the magnetic pole core by flowing three-phase alternating current. The coil mounted on the base side of the first magnetic pole core and the second magnetic pole core adjacent to the first magnetic pole core is a U-phase, and includes the third magnetic pole core and the fourth magnetic pole core adjacent thereto. The coil mounted on the base side of the V pole is the V phase, the coil mounted on the base side of the fifth magnetic pole core and the sixth magnetic pole core adjacent thereto is the W phase, and the coil mounted on the base side of the adjacent magnetic pole core is The mounted coil has the same phase as that of the coil on the mold side of the adjacent magnetic pole core located at a position opposed to the yoke axis.
(4) The electromagnetic stirrer according to claim 3, wherein the coils wound on the base side of the adjacent in-phase magnetic pole cores and the coils wound on the mold side of the adjacent in-phase magnetic pole cores. They are connected and integrated.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components as those in the conventional example will be denoted by the same reference numerals, and components different from those in the conventional example will be denoted by new reference numerals and described. FIG. 1 is a transverse sectional view of an electromagnetic stirrer showing a first embodiment of the present invention. In the drawing, a plurality of magnetic pole iron cores 11 to 16 are arranged on a yoke at an equal pitch of 60 °, and 211, 212, 221, 222, 231, 232, 241, 242, 251, 252, 261 and 262 are each magnetic poles. It is a coil attached to iron cores 11-16. The coils 211 and 221 mounted on the base side of the first magnetic pole core 11 and the base side of the second magnetic pole core 12 adjacent thereto have a U-phase, and the base side of the third magnetic pole core 13 is adjacent to the third side. The coils 231 and 241 mounted on the base side of the fourth magnetic pole core 14 are V-phase, and the coils 251 and 261 mounted on the base side of the fifth magnetic pole core 15 and the base side of the sixth magnetic pole core 16 adjacent thereto. Is a W-phase, and a three-phase alternating current is passed so as to have N poles, respectively. On the other hand, the coils 212, 222, 232, 242, 252, 262 mounted on the mold 4 side of the respective magnetic pole cores are the yoke 1 When the three-phase alternating current is applied so that the coils are in the same phase as the coils mounted on the base side of the magnetic pole irons at positions opposing each other with the axis of the magnetic poles in the opposite directions, the magnetic poles of the N poles of each phase are shifted to the S poles. Magnetic flux Φ u , Φ generated in the direction toward the magnetic pole iron v, [Phi w is 3-phase rotating magnetic field is generated in the passage to the inter-pole around the molten metal 5 in the mold 4. As a result, a rotating force is generated in the same direction as the rotating direction of the magnetic field, and the molten metal 5 in the mold 4 arranged near the axis of the yoke 1 is stirred.
In the present embodiment, the arrangement of the magnetic pole cores 11 to 16 in the yoke 1 is equal pitch. However, the present invention is not limited to this. For example, the pitch between two pole cores 11 and 12 adjacent to each other in these pole cores is set to be larger than the interval between the other pole cores adjacent to each other.
[0006]
Next, a second embodiment of the present invention will be described. FIG. 2 is a transverse sectional view of an electromagnetic stirrer showing a second embodiment. In the figure, the difference from the first embodiment is that the coils wound around the bases of the adjacent in-phase magnetic pole cores are connected and integrated, and the adjacent in-phase magnetic pole cores are connected to the mold side. The wound coils are connected and integrated. That is, the coils 271 and 282 are in the U phase, the coils 281 and 292 are in the V phase, and the coils 291 and 272 are in the W phase.
In such a configuration, when a three-phase alternating current is applied so that the coil wound on the base side of the magnetic pole core becomes the N pole and the coil wound on the mold side becomes the S pole, the N pole of each phase is turned on. Magnetic fluxes Φ u , Φ v , Φ w generated in the direction from the iron core toward the S pole magnetic core penetrate the molten metal 5 in the mold 4 to generate a three-phase rotating magnetic field at the center between the magnetic poles. As a result, a rotating force is generated in the same direction as the rotating direction of the magnetic field, and the molten metal 5 in the mold 4 arranged near the axis of the yoke 1 is stirred.
[0007]
Next, an electromagnetic stirrer having the configuration described in the first embodiment of the present invention was actually manufactured, and the magnetic flux density was measured without a mold provided inside the apparatus. FIG. 3 shows the circumferential distribution of the magnitude of the magnetic flux density in the gap between the magnetic pole cores of the electromagnetic stirrer, and is compared with the conventional device at the same amper turn number. From this, it was confirmed that the magnetic flux density was twice as large as the conventional one. Therefore, in the present invention, the number of ampere-turns required to generate a magnetic flux density equivalent to that of the related art can be reduced to half that of the related art, and the attenuation of the magnetic pole coming out of the magnetic pole core can be suppressed as compared with the related art.
FIG. 4 shows the magnitude of the flow rate of the molten metal in the mold placed near the axis of the electromagnetic stirring device. From this, it can be seen that the flow rate of the molten metal is twice as large as that of the prior art. confirmed. Therefore, in the present invention, the number of ampere turns required to obtain the same flow rate as the conventional one can be halved, and the size of the electromagnetic stirrer can be made smaller than before.
In addition, it was confirmed that the same effects can be obtained with the electromagnetic stirrer having the configuration described in the second embodiment.
[0008]
【The invention's effect】
As described above, according to the present invention, a rotating force can be applied to the molten metal disposed near the center with half the number of ampere turns of the conventional technology, so that the apparatus itself can be made compact. In addition, there is an effect that a highly reliable electromagnetic stirrer that can sufficiently cope with equipment with strict dimensional restrictions is obtained.
[Brief description of the drawings]
FIG. 1 is a transverse cross-sectional view of an electromagnetic stirrer showing a first embodiment of the present invention.
FIG. 2 is a lateral cross-sectional view of the same device showing a second embodiment of the present invention.
FIG. 3 is a view showing a circumferential distribution of a magnetic flux density in a gap between magnetic pole cores of an electromagnetic stirrer.
FIG. 4 is a diagram showing the magnitude of the flow velocity of a molten metal in a mold placed near the center of an electromagnetic stirring device.
FIG. 5 is a longitudinal sectional view of an electromagnetic stirrer showing a conventional example.
6 is a lateral sectional view taken along line AA ′ of FIG.
[Explanation of symbols]
1: Yoke 11 to 16: magnetic pole cores 211, 212, 221, 222, 231,
232, 241, 242, 251, 252,
261, 262, 271, 272, 281,
282, 291, 292: coil 4: mold 5: molten metal,
F r: rotational force l p: pole width Φ U, Φ V, Φ W : flux

Claims (4)

溶融金属を流す鋳型の周囲に設けられるとともにその内周面上に沿って等ピッチで配置され突出した複数の磁極鉄心を有するヨークと、前記磁極鉄心を取り囲むように装着されたコイルからなり、回転磁界を発生させる電磁攪拌装置において、
前記磁極鉄心に装着されたコイルは、３相交流を流すことにより前記磁極鉄心の根元側と前記磁極鉄心の鋳型側とが互いに異なる極性を有する二つの積重ね体からなり、第１の磁極鉄心およびこれと隣り合う第２の磁極鉄心の根元側に装着するコイルがＵ相であり、第３の磁極鉄心およびこれと隣り合う第４の磁極鉄心の根元側に装着するコイルがＶ相であり、第５の磁極鉄心およびこれと隣り合う第６の磁極鉄心の根元側に装着するコイルがＷ相であり、前記隣り合う磁極鉄心の根元側に装着されたコイルは、前記ヨ−クの軸心を隔てて対向した位置にある隣り合う磁極鉄心の鋳型側のコイルと同相としたことを特徴とする電磁攪拌装置。A yoke having a plurality of magnetic pole cores protruding and arranged at equal pitches along the inner peripheral surface of a mold for flowing molten metal, and a coil mounted so as to surround the magnetic pole cores, In an electromagnetic stirrer that generates a magnetic field,
The coil mounted on the pole core is formed of two stacked bodies having different polarities at the base side of the pole core and the mold side of the pole core by flowing three-phase alternating current, and the first pole core and The coil mounted on the base side of the second magnetic pole core adjacent thereto is the U phase, and the coil mounted on the base side of the third magnetic core and the fourth magnetic pole core adjacent thereto is the V phase, The coil mounted on the root side of the fifth magnetic pole core and the sixth magnetic pole core adjacent thereto is W-phase, and the coil mounted on the root side of the adjacent magnetic pole core is the axis of the yoke. An electromagnetic stirrer characterized in that it has the same phase as that of a coil on the mold side of an adjacent magnetic pole iron which is located at a position facing away from the mold. 前記隣り合う同相とした磁極鉄心の根元側に巻回されたコイル同志および前記隣り合う同相とした磁極鉄心の鋳型側に巻回されたコイル同志を接続して一体化した請求項１に記載の電磁攪拌装置。The coil according to claim 1, wherein the coils wound around the base of the adjacent in-phase magnetic pole core and the coils wound around the mold of the adjacent in-phase magnetic core are connected and integrated. Electromagnetic stirrer. 溶融金属を流す鋳型の周囲に設けられるとともにその内周面上に沿って不等ピッチで配置され突出した複数の磁極鉄心を有するヨークと、前記磁極鉄心を取り囲むように装着されたコイルからなり、回転磁界を発生させる電磁攪拌装置において、
前記磁極鉄心に装着されたコイルは、３相交流を流すことにより前記磁極鉄心の根元側と前記磁極鉄心の鋳型側とが互いに異なる極性を有する二つの積重ね体からなり、第１の磁極鉄心およびこれと隣り合う第２の磁極鉄心の根元側に装着するコイルがＵ相であり、第３の磁極鉄心およびこれと隣り合う第４の磁極鉄心の根元側に装着するコイルがＶ相であり、第５の磁極鉄心およびこれと隣り合う第６の磁極鉄心の根元側に装着するコイルがＷ相であり、前記隣り合う磁極鉄心の根元側に装着されたコイルは、前記ヨ−クの軸心を隔てて対向した位置にある隣り合う磁極鉄心の鋳型側のコイルと同相としたことを特徴とする電磁攪拌装置。A yoke having a plurality of magnetic pole cores protruded and arranged at irregular pitches along the inner peripheral surface thereof provided around a mold for flowing molten metal, and a coil mounted so as to surround the magnetic pole cores, In an electromagnetic stirrer that generates a rotating magnetic field,
The coil mounted on the pole core is formed of two stacked bodies having different polarities at the base side of the pole core and the mold side of the pole core by flowing three-phase alternating current, and the first pole core and The coil mounted on the base side of the second magnetic pole core adjacent thereto is the U phase, and the coil mounted on the base side of the third magnetic core and the fourth magnetic pole core adjacent thereto is the V phase, The coil mounted on the root side of the fifth magnetic pole core and the sixth magnetic pole core adjacent thereto is W-phase, and the coil mounted on the root side of the adjacent magnetic pole core is the axis of the yoke. An electromagnetic stirrer characterized in that it has the same phase as that of a coil on the mold side of an adjacent magnetic pole iron which is located at a position facing away from the mold. 前記隣り合う同相とした磁極鉄心の根元側に巻回されたコイル同志および前記隣り合う同相とした磁極鉄心の鋳型側に巻回されたコイル同志を接続して一体化した請求項３に記載の電磁攪拌装置。4. The coil according to claim 3, wherein the coils wound on the base side of the adjacent in-phase magnetic pole cores and the coils wound on the mold side of the adjacent in-phase magnetic pole cores are connected and integrated. Electromagnetic stirrer.
JP05410797A 1997-02-20 1997-02-20 Electromagnetic stirrer Expired - Fee Related JP3570601B2 (en)

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