JP2891651B2 - C type coil - Google Patents
C type coilInfo
- Publication number
- JP2891651B2 JP2891651B2 JP16729695A JP16729695A JP2891651B2 JP 2891651 B2 JP2891651 B2 JP 2891651B2 JP 16729695 A JP16729695 A JP 16729695A JP 16729695 A JP16729695 A JP 16729695A JP 2891651 B2 JP2891651 B2 JP 2891651B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- electromagnetic steel
- pitch
- cooled copper
- sheets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- General Induction Heating (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、板材や帯板の端部
を加熱するエッジヒータ等のＣ型コイルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a C-shaped coil such as an edge heater for heating an end of a plate or a strip.
【０００２】[0002]
【従来の技術】炉等で加熱した板材は、次工程に搬送す
る際に、その端部が冷却され温度が中心部より下がる。
板幅方向の温度分布は、次工程で例えばめっきを行う場
合や圧延を行う場合等均一性が品質上重要なポイントと
なる。このため、板材の端部を加熱し、板幅方向の温度
分布を同一にするエッジヒータが用いられる。2. Description of the Related Art When a plate material heated in a furnace or the like is conveyed to the next step, its end is cooled and its temperature is lower than that of its center.
Regarding the temperature distribution in the plate width direction, uniformity is an important point in quality in the next step, for example, when plating or rolling is performed. For this reason, an edge heater that heats the end of the plate material and makes the temperature distribution in the plate width direction the same is used.
【０００３】エッジヒータとして、従来では、図２に示
すＣ型のエッジヒータが用いられ、加熱対象物である板
材１はエアギャップ２間に設置される。Ｃ型のエッジヒ
ータでは、磁束を通すための磁路（磁気回路を構成する
磁性体及びエアギャップ）を電磁鋼板３を組み合わせて
Ｃ型にすることで構成する。電磁鋼板３は鉄損（ジュー
ル発熱）を小さくするために複数枚重ね合わせて鉄心４
を構成する。また、磁束発生用に、ギャップの上下の鉄
心４部に、通常、水冷した銅パイプを用いた通電可能な
コイル５を設置する。更に、電磁鋼板３による鉄損が原
因の発熱量を除くために、複数枚重ねている電磁鋼板３
の所々に水冷銅板６を設け、通しボルト７で全体を締め
付けている。なお、コイル５には、高周波電流を供給す
る整合器及び電源が接続される（図示せず）。また、コ
イル５の内部には、冷却用の水８が供給され、大電流に
よるコイル５の発熱量を除いている。Conventionally, a C-type edge heater shown in FIG. 2 is used as an edge heater, and a plate 1 to be heated is placed between air gaps 2. The C-type edge heater is configured such that a magnetic path for passing a magnetic flux (a magnetic body and an air gap forming a magnetic circuit) is formed into a C-type by combining the electromagnetic steel sheets 3. In order to reduce iron loss (Joule heat), a plurality of magnetic steel sheets 3
Is configured. In order to generate magnetic flux, energizable coils 5 usually using water-cooled copper pipes are installed in the iron cores 4 above and below the gap. Further, in order to eliminate the heat value caused by iron loss due to the electromagnetic steel sheet 3, a plurality of stacked electromagnetic steel sheets 3
The water-cooled copper plate 6 is provided at several places, and the whole is fastened with through bolts 7. Note that a matching device and a power supply for supplying a high-frequency current are connected to the coil 5 (not shown). Further, cooling water 8 is supplied into the coil 5 to remove the heat generated by the coil 5 due to a large current.
【０００４】[0004]
【発明が解決しようとする課題】ところで、板材の上下
に設置されるＣ型コイルギャップの上下の鉄心の断面形
状は、電磁鋼板を複数枚重ねて組む制約上、矩形形状と
なる（図２のＡ−Ａ断面参照）。そして、板材を通板さ
せるためのＣ型コイルギャップは、板材の形状及び通板
性を考慮して、５０〜３００ｍｍ程度としている。ま
た、誘導加熱は、磁束が鉄心内部からギャップを通る際
に板材内部に発生する誘導電流を利用している。By the way, the cross-sectional shape of the iron core above and below the C-shaped coil gap installed above and below the plate material is rectangular due to the restriction of stacking a plurality of electromagnetic steel sheets (see FIG. 2). AA section). The C-shaped coil gap for passing the plate material is set to about 50 to 300 mm in consideration of the shape and the passability of the plate material. Further, the induction heating utilizes an induction current generated inside the plate material when the magnetic flux passes through the gap from inside the iron core.
【０００５】ところが、上記ギャップが広くなると、エ
アギャップの中心に近くなるに従い、磁束は鉄心断面積
と比べて広がる。この広がった磁束は、鉄心に戻る際
（磁束が鉄心に入る際）に電磁鋼板面を貫通することに
なる。[0005] However, when the gap is widened, the magnetic flux expands as compared with the cross-sectional area of the iron core as it approaches the center of the air gap. The spread magnetic flux penetrates the electromagnetic steel sheet surface when returning to the iron core (when the magnetic flux enters the iron core).
【０００６】従って、本来ならば、電磁鋼板の板厚方向
に垂直に貫通すべき磁束が、ある角度をもつため、電磁
鋼板に大きな誘導電流が流れ、電磁鋼板間で絶縁破壊が
起こり、鉄心の加熱という事態を招く。即ち、電磁鋼板
の板厚は、電磁鋼板の板厚方向に流れる誘導電流の流れ
る厚み（浸透深さ）の２倍より薄くする。板厚をこのよ
うに選定すると、電磁鋼板での発熱量（鉄損）は小さく
する事が出来る。ところが、複数枚の電磁鋼板間で絶縁
破壊が起こると、浸透深さの２倍より厚い電磁鋼板を使
ったことと同じ効果のため、鉄損が大きくなるのであ
る。Therefore, the magnetic flux that should normally penetrate perpendicularly to the thickness direction of the magnetic steel sheet has a certain angle, so that a large induced current flows through the magnetic steel sheet, dielectric breakdown occurs between the magnetic steel sheets, and This leads to heating. That is, the thickness of the electromagnetic steel sheet is set to be smaller than twice the thickness (permeation depth) of the induced current flowing in the thickness direction of the electromagnetic steel sheet. When the sheet thickness is selected in this manner, the calorific value (iron loss) of the magnetic steel sheet can be reduced. However, if dielectric breakdown occurs between a plurality of electromagnetic steel sheets, iron loss increases due to the same effect as using an electromagnetic steel sheet thicker than twice the penetration depth.
【０００７】前記加熱の原因を説明すると、Ｃ型コイル
では、ギャップ間で図３に示すような磁界９の分布とな
る。即ち、ギャップが広いため、上下鉄心４，４の中心
で鉄心断面積よりふくらむ形状となる。このふくらみの
ため、磁束は、鉄心板を貫通する（図中ａ部）ことにな
る。この磁束の貫通による電磁鋼板及び銅板内の誘導起
電力により、電磁鋼板表面の絶縁被膜が破れる程度の電
圧が印加されることになるのである。The cause of the heating will be described. In the C-shaped coil, the magnetic field 9 is distributed between the gaps as shown in FIG. That is, since the gap is wide, the upper and lower cores 4 and 4 have a shape that is larger than the core cross-sectional area at the center. Due to this swelling, the magnetic flux penetrates the iron core plate (a portion in the figure). Due to the induced electromotive force in the electromagnetic steel sheet and the copper sheet due to the penetration of the magnetic flux, a voltage is applied to the extent that the insulating coating on the surface of the electromagnetic steel sheet is broken.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
の本発明の構成は、所定ピッチで配した水冷銅板間に電
磁鋼板を複数枚重ねてＣ型形状となし、エアギャップ上
下の鉄心部に高周波電流を流すコイルを巻き、エアギャ
ップ間に板材を挾んで誘導加熱する装置において、前記
隣接する電磁鋼板間に絶縁紙を挾持させると共に、前記
水冷銅板間の電磁鋼板を水冷銅板より小さい寸法とした
ことを特徴とする。また、前記絶縁紙は電磁鋼板の板幅
方向面に磁界が貫通する部分に挾持されると、絶縁紙を
効率的に用いることができ、省資源の面で好適である。
また、前記水冷銅板のピッチを鉄心部外側では中心付近
のピッチと比べて小さくすると好適である。また、所定
ピッチで配した水冷銅板間に電磁鋼板を複数枚重ねてＣ
型形状となし、エアギャップ上下の鉄心部に高周波電流
を流すコイルを巻き、エアギャップ間に板材を挾んで誘
導加熱する装置において、前記隣接する電磁鋼板間に絶
縁紙を挾持させると共に、前記水冷銅板間の電磁鋼板の
寸法を、鉄心部外側では水冷銅板より小さくし、２〜３
段階の寸法を経て中心部の水冷銅板と同じ寸法としたこ
とを特徴とする。 また、前記絶縁紙は電磁鋼板の板幅方
向面に磁界が貫通する部分に挾持されると好適である。
また、前記水冷銅板のピッチを鉄心部外側では中心付近
のピッチと比べて小さくすると好適である。 According to the structure of the present invention, a plurality of electromagnetic steel plates are stacked between water-cooled copper plates arranged at a predetermined pitch to form a C-shape. a winding coil to flow a high frequency current, the apparatus for induction heating across the plate between the air gap, Rutotomoni is sandwiched insulating paper between the electromagnetic steel sheets to the adjacent, the
The electromagnetic steel sheet between the water-cooled copper plates is smaller than the water-cooled copper plate . Further, when the insulating paper is sandwiched between portions where a magnetic field penetrates the surface of the magnetic steel sheet in the width direction, the insulating paper can be used efficiently, which is preferable in terms of resource saving.
Further, it is preferable that the pitch of the water-cooled copper plate be smaller outside the core than in the vicinity of the center. Also prescribed
Plural electromagnetic steel sheets are stacked between water-cooled copper sheets
High frequency current in the iron core above and below the air gap
Wind the coil, and sandwich the plate between the air gaps.
In the device that conducts heat, the gap between the adjacent magnetic steel sheets
While holding the edge paper, the electromagnetic steel sheet between the water-cooled copper sheets
Dimensions are smaller than the water-cooled copper plate outside the core, 2-3
After the step size, the same size as the water-cooled copper plate in the center
And features. In addition, the insulating paper is in the width direction of the electromagnetic steel sheet.
It is preferable that the magnetic field is clamped by a portion through which a magnetic field penetrates.
In addition, the pitch of the water-cooled copper plate is near the center outside the iron core.
It is preferable that the pitch is smaller than the pitch of the first pitch.
【０００９】前記構成によれば、Ｃ型コイルのギャップ
間でふくらんだ磁束は上下の鉄心に、図３に示すように
入る。このため、側板及び側板に近い電磁鋼板には誘導
起電力が発生する。ところが、側板及び電磁鋼板の１枚
１枚の間に絶縁紙を挾んでいるため、電磁鋼板同士の絶
縁破壊、それに続く誘導電流の増大による加熱を防ぐ作
用を及ぼすことが可能となる。また、水冷銅板のピッチ
を磁束の集中し易い外側では中心と比べて小さくしてい
るために、磁束の遮蔽効果及び冷却性能を向上させるこ
とができる。また、電磁鋼板寸法を鉄心部外側では水冷
銅板より小さくしているために、磁束の遮蔽効果が相乗
されて、電磁鋼板の加熱を防ぐことができる。According to the above configuration, the magnetic flux swelling between the gaps of the C-shaped coil enters the upper and lower iron cores as shown in FIG. For this reason, an induced electromotive force is generated in the side plate and the electromagnetic steel plate near the side plate. However, since the insulating paper is sandwiched between the side plates and the magnetic steel sheets, it is possible to prevent dielectric breakdown between the magnetic steel sheets and to prevent a subsequent heating due to an increase in induced current. Further, since the pitch of the water-cooled copper plate is made smaller than the center at the outside where the magnetic flux is easily concentrated, the shielding effect of the magnetic flux and the cooling performance can be improved. Further, since the size of the electromagnetic steel sheet is smaller than that of the water-cooled copper sheet outside the iron core portion, the effect of shielding magnetic flux is synergistic, so that heating of the electromagnetic steel sheet can be prevented.
【００１０】[0010]
【発明の実施の形態】以下添付図面に基づいて、本発明
の一実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１１】図１に示すように、本発明によるＣ型コイ
ルの外形形状は、Ｃ型形状をなす鉄心４を、電磁鋼板３
を複数枚重ねたものと水冷銅板６と鉄心を締める側板１
０及び通しボルト７で構成する点で、図２に示した従来
のものと変わらない。但し、本発明では図４に示すよう
に、エアギャップ２上下の鉄心４において、外側水冷銅
板６のピッチを中心部と比べて小さくしている。更に、
図１及び図５に示すように、電磁鋼板３寸法を外側で
は、水冷銅板６より小さくし、段階（図示例では２段
階）を経て、中心部電極鋼板３寸法としている。As shown in FIG. 1, the outer shape of a C-shaped coil according to the present invention is such that an iron core 4 having a C-shaped shape is
, A water-cooled copper plate 6 and a side plate 1 for fastening an iron core
2 and the conventional bolt shown in FIG. However, in the present invention, as shown in FIG. 4, the pitch of the outer water-cooled copper plate 6 in the iron cores 4 above and below the air gap 2 is smaller than that in the center. Furthermore,
As shown in FIGS. 1 and 5, the outer dimensions of the electromagnetic steel sheet 3 are made smaller than those of the water-cooled copper sheet 6, and after the steps (two steps in the illustrated example), the central electrode steel sheet 3 is formed.
【００１２】また、エアギャップ２上下の鉄心４部に
は、水冷した銅製のコイル５を巻いて鉄心内部及びエア
ギャップに磁路内に磁束（磁界）を発生させる構造とな
っている。A water-cooled copper coil 5 is wound around the iron core 4 above and below the air gap 2 to generate a magnetic flux (magnetic field) inside the iron core and in the magnetic path in the air gap.
【００１３】更に、コイル５には、高周波電流を通すた
めの整合器及び高周波電源が接続される（図示せず）。
また、冷却用の水８も供給される。Further, a matching device for passing a high-frequency current and a high-frequency power source are connected to the coil 5 (not shown).
Further, cooling water 8 is also supplied.
【００１４】そして、本発明では、図１に示すように、
電磁鋼板３を複数枚重ねる構造に、更に電磁鋼板３同士
及び電磁鋼板３と水冷銅板６との間に絶縁紙１１を挾む
構成としている。In the present invention, as shown in FIG.
The structure is such that a plurality of magnetic steel sheets 3 are stacked, and further, insulating paper 11 is sandwiched between the magnetic steel sheets 3 and between the magnetic steel sheet 3 and the water-cooled copper plate 6.
【００１５】具体的には、上記構成を、磁界が電磁鋼板
３の板幅方向面に貫通する部分１３（図３参照）のみに
採用する。More specifically, the above configuration is applied only to the portion 13 (see FIG. 3) through which the magnetic field penetrates the surface of the magnetic steel sheet 3 in the width direction.
【００１６】このように構成されるため、鉄心断面３５
０ｍｍ×２００ｍｍで約１０００Ｋｗの投入電力、加熱
周波数５００ＨｚのＣ型コイルで、鉄心４を構成する電
磁鋼板３間に絶縁紙１１がない場合には、エアギャップ
２に近い鉄心先端の磁束が貫通する位置で過熱が発生し
て全電力を投入できなかった。ところが、電磁鋼板３間
の１枚，１枚に絶縁紙１１を挟み、水冷銅板６のピッチ
を鉄心４の外側では小さくし、かつ外側の電磁鋼板３を
水冷銅板６より小さくして２〜３段階の寸法を経て中心
部電磁鋼板３を水冷銅板６とほぼ等しくした本発明のＣ
型コイルでは、上記条件で問題なく運転できた。With this configuration, the iron core section 35
When the insulating paper 11 is not provided between the electromagnetic steel sheets 3 constituting the iron core 4 with a C-shaped coil of 0 mm × 200 mm, input power of about 1000 Kw and heating frequency of 500 Hz, the magnetic flux at the tip of the iron core close to the air gap 2 penetrates. Overheating occurred at the position and all power could not be supplied. However, the pitch of the water-cooled copper plate 6 is made smaller outside the iron core 4 and the outer electromagnetic steel plate 3 is made smaller than the water-cooled copper plate 6 by two to C of the present invention in which the central electromagnetic steel plate 3 is made substantially equal to the water-cooled copper plate 6
The type coil could be operated under the above conditions without any problem.
【００１７】[0017]
【発明の効果】以上説明したように本発明によれば、所
定ピッチで配した水冷銅板間に電磁鋼板を複数枚重ねて
Ｃ型形状となし、エアギャップ上下の鉄心部に高周波電
流を流すコイルを巻き、エアギャップ間に板材を挾んで
誘導加熱する装置において、前記隣接する電磁鋼板間に
絶縁紙を挾持させると共に電磁鋼板寸法を鉄心部外側で
は水冷銅板より小さくしたので、複数枚重ねている電磁
鋼板同士間での誘導起電力による絶縁破壊を防止できる
と共に磁束の遮蔽効果が得られ、電磁鋼板及び鉄心の過
熱の発生を回避してＣ型コイルを長時間に亙り安定して
運転できる。According to the present invention as described above, according to the present invention, where
A device that forms a C-shape by stacking multiple electromagnetic steel sheets between water-cooled copper sheets arranged at a constant pitch, winding coils that pass high-frequency current through the iron core above and below the air gap, and inducing heating by sandwiching the sheet material between the air gaps the Rutotomoni electromagnetic steel dimension is sandwiched insulating paper between the electromagnetic steel plate core portion outside of said adjacent
Is smaller than a water-cooled copper plate , so it is possible to prevent dielectric breakdown due to induced electromotive force between multiple stacked electromagnetic steel plates and obtain a magnetic flux shielding effect, avoiding the occurrence of overheating of the magnetic steel plates and iron core The C-shaped coil can be operated stably for a long time.
【図１】本発明の一実施例に係る鉄心の構成図である。FIG. 1 is a configuration diagram of an iron core according to an embodiment of the present invention.
【図２】従来のＣ型コイルの外形図である。FIG. 2 is an external view of a conventional C-shaped coil.
【図３】エアギャップでの磁束分布の説明図である。FIG. 3 is an explanatory diagram of a magnetic flux distribution in an air gap.
【図４】本発明に係るＣ型コイルの外形図である。FIG. 4 is an external view of a C-shaped coil according to the present invention.
【図５】本発明に係る鉄心外側の構成を説明する図であ
る。FIG. 5 is a view for explaining the configuration of the outside of the iron core according to the present invention.
１ 板材 ２ エアギャップ ３ 電磁鋼板 ４ 鉄心 ５ コイル ６ 水冷銅板 ７ 通しボルト ８ 冷却水 ９ 磁界 １０ 側板 １１ 絶縁紙 １３ 磁界が電磁鋼板幅方向に貫通する部分 DESCRIPTION OF SYMBOLS 1 Plate material 2 Air gap 3 Magnetic steel plate 4 Iron core 5 Coil 6 Water-cooled copper plate 7 Through bolt 8 Cooling water 9 Magnetic field 10 Side plate 11 Insulating paper 13 Portion where magnetic field penetrates in the width direction of magnetic steel plate
フロントページの続き (72)発明者 藤岡 宏規 広島県広島市西区観音新町四丁目６番22 号 三菱重工業株式会社 広島製作所内 (72)発明者 岩間 信男 東京都大田区城南島二丁目４番３号 株 式会社江口高周波内 (56)参考文献 実開 昭56−46195（ＪＰ，Ｕ) 実開 昭58−148897（ＪＰ，Ｕ) 特公 昭61−39716（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) H05B 6/00 - 6/10 H05B 6/14 - 6/44 Continued on the front page (72) Inventor Hironori Fujioka 4-6-22 Kannonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Nobuo Iwama 2-4-2 Jonanjima, Ota-ku, Tokyo (56) References JP-A-56-46195 (JP, U) JP-A-58-148897 (JP, U) JP-B-61-39716 (JP, B2) (58) Fields surveyed (Int.Cl. 6 , DB name) H05B 6/ 00-6/10 H05B 6/ 14-6/44
Claims (6)
板を複数枚重ねてＣ型形状となし、エアギャップ上下の
鉄心部に高周波電流を流すコイルを巻き、エアギャップ
間に板材を挾んで誘導加熱する装置において、前記隣接
する電磁鋼板間に絶縁紙を挾持させると共に、前記水冷
銅板間の電磁鋼板を水冷銅板より小さい寸法としたこと
を特徴とするＣ型コイル。1. A plurality of electromagnetic steel sheets are stacked between water-cooled copper sheets arranged at a predetermined pitch to form a C-shape. A coil for flowing a high-frequency current is wound around iron cores above and below an air gap, and the sheet material is sandwiched between the air gaps. an apparatus for induction heating, Rutotomoni is sandwiched insulating paper between the electromagnetic steel sheets to the adjacent, the water-cooled
A C-shaped coil, wherein a size of an electromagnetic steel sheet between copper sheets is smaller than that of a water-cooled copper sheet .
界が貫通する部分に挾持される請求項１記載のＣ型コイ
ル。2. The C-shaped coil according to claim 1, wherein said insulating paper is clamped at a portion where a magnetic field penetrates a surface in a width direction of the electromagnetic steel sheet.
中心付近のピッチと比べて小さくした請求項１又は２記
載のＣ型コイル。3. The C-shaped coil according to claim 1, wherein the pitch of the water-cooled copper plate is smaller outside the core than in the vicinity of the center.
板を複数枚重ねてＣ型形状となし、エアギャップ上下の
鉄心部に高周波電流を流すコイルを巻き、エアギャップ
間に板材を挾んで誘導加熱する装置において、前記隣接
する電磁鋼板間に絶縁紙を挾持させると共に、前記水冷
銅板間の電磁鋼板の寸法を、鉄心部外側では水冷銅板よ
り小さくし、２〜３段階の寸法を経て中心部の水冷銅板
と同じ寸法としたことを特徴とするＣ型コイル。 4. An electromagnetic steel between water-cooled copper plates arranged at a predetermined pitch.
Plural sheets are stacked to form a C-shape.
Wind a coil that passes high-frequency current through the iron core,
In an apparatus for induction heating with a plate material interposed therebetween,
Insulating paper is sandwiched between magnetic steel sheets
The dimensions of the magnetic steel sheet between the copper sheets should be
Water-cooled copper plate in the center after two or three dimensions
A C-shaped coil having the same dimensions as the above.
界が貫通する部分に挾持される請求項４記載のＣ型コイ
ル。 5. The insulating paper according to claim 1, wherein said insulating paper has magnetic
5. The C-shaped coil according to claim 4, which is clamped at a portion through which the field penetrates.
Le.
中心付近のピッチと比べて小さくした請求項４又は５記
載のＣ型コイル。 6. The pitch of the water-cooled copper plate outside the core portion
The pitch according to claim 4 or 5, wherein the pitch is smaller than the pitch near the center.
The above-mentioned C type coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16729695A JP2891651B2 (en) | 1995-07-03 | 1995-07-03 | C type coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16729695A JP2891651B2 (en) | 1995-07-03 | 1995-07-03 | C type coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0917561A JPH0917561A (en) | 1997-01-17 |
| JP2891651B2 true JP2891651B2 (en) | 1999-05-17 |
Family
ID=15847128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16729695A Expired - Fee Related JP2891651B2 (en) | 1995-07-03 | 1995-07-03 | C type coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2891651B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105745993B (en) * | 2013-12-13 | 2019-02-15 | 东芝三菱电机产业***株式会社 | Induction heating apparatus |
| JP6528712B2 (en) * | 2016-04-18 | 2019-06-12 | Ｊｆｅスチール株式会社 | Iron core for induction heating coil, induction heating coil, and heating apparatus |
-
1995
- 1995-07-03 JP JP16729695A patent/JP2891651B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0917561A (en) | 1997-01-17 |
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