JP2677114B2 - Induction heating device - Google Patents
Induction heating deviceInfo
- Publication number
- JP2677114B2 JP2677114B2 JP4131920A JP13192092A JP2677114B2 JP 2677114 B2 JP2677114 B2 JP 2677114B2 JP 4131920 A JP4131920 A JP 4131920A JP 13192092 A JP13192092 A JP 13192092A JP 2677114 B2 JP2677114 B2 JP 2677114B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- rolled material
- gap
- power
- heating coil
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧延ラインを搬送中の
圧延材を誘導加熱するために用いる誘導加熱装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating apparatus used for induction heating a rolled material being conveyed on a rolling line.
【０００２】[0002]
【従来の技術】熱間圧延ラインを搬送中の圧延材を加熱
するために誘導加熱装置が使用されている。そして貫通
磁束式誘導加熱装置は、金属板材（非磁性材等）の加熱
に広く用いられており、熱間圧延ラインのエッジヒータ
に適用することが良く知られている。2. Description of the Related Art An induction heating device is used to heat a rolled material being conveyed in a hot rolling line. The through-flux induction heating device is widely used for heating a metal plate material (non-magnetic material or the like), and is well known to be applied to an edge heater of a hot rolling line.
【０００３】図２は従来の貫通磁束式誘導加熱装置によ
り圧延材を加熱する状態を示す模式的側面図である。圧
延ラインを搬送する圧延材４の上方及び下方には、上側
加熱コイル２，２及び下側加熱コイル３，３が配設され
ている。上側加熱コイル２，２及び下側加熱コイル３，
３夫々は、圧延材４の搬送方向に適長離隔して配置され
ている。上側加熱コイル２，２及び下側加熱コイル３，
３夫々は上下動させ得るように駆動制御部１，１及び
１，１と各別に接続されている。そして圧延材４を加熱
する場合は、圧延材４と上側加熱コイル２，２との距離
ｘ及び圧延材４と下側加熱コイル３，３との距離ｙ、即
ち上側加熱コイル２，２と下側加熱コイル３，３とのギ
ャップｇが適長となるように制御して、圧延材４に所定
の加熱電力を供給し、圧延材４を加熱する。FIG. 2 is a schematic side view showing a state in which a rolled material is heated by a conventional penetration flux type induction heating device. The upper heating coils 2 and 2 and the lower heating coils 3 and 3 are arranged above and below the rolled material 4 that conveys the rolling line. Upper heating coil 2, 2 and lower heating coil 3,
Each of the three members is arranged so as to be separated by an appropriate length in the transport direction of the rolled material 4. Upper heating coil 2, 2 and lower heating coil 3,
Each of the three is separately connected to the drive control units 1, 1 and 1, 1 so that they can be moved up and down. When heating the rolled material 4, the distance x between the rolled material 4 and the upper heating coils 2 and 2 and the distance y between the rolled material 4 and the lower heating coils 3 and 3, that is, the upper heating coils 2 and 2 and The rolled material 4 is heated by controlling the gap g with the side heating coils 3 and 3 to be an appropriate length and supplying a predetermined heating power to the rolled material 4.
【０００４】この方式の誘導加熱装置では上側加熱コイ
ル２，２と下側加熱コイル３，３とのギャップｇが大き
くなるにともない、効率、力率、インピーダンスが低下
し、加熱コイルの有効単機容量が減少する。上側加熱コ
イル２，２及び下側加熱コイル３，３は、搬送される圧
延材４との衝突を防ぐために圧延材４に対して所定距離
を確保する必要があり、そのため上側加熱コイル２，２
及び下側加熱コイル３，３の加熱能力を考慮して所定距
離に選定している。一方、圧延材を加熱するための誘導
加熱装置は、例えば特開昭53-70063号及び特開昭59-116
318 号公報夫々に示されている。In this type of induction heating apparatus, as the gap g between the upper heating coils 2 and 2 and the lower heating coils 3 and 3 increases, the efficiency, power factor and impedance decrease, and the effective single unit capacity of the heating coil increases. Is reduced. The upper heating coils 2 and 2 and the lower heating coils 3 and 3 need to secure a predetermined distance with respect to the rolled material 4 in order to prevent collision with the rolled material 4 being conveyed, and therefore, the upper heating coils 2 and 2 are provided.
The predetermined distance is selected in consideration of the heating capacities of the lower heating coils 3 and 3. On the other hand, an induction heating device for heating a rolled material is disclosed in, for example, JP-A-53-70063 and JP-A-59-116.
No. 318, respectively.
【０００５】[0005]
【発明が解決しようとする課題】しかし乍ら、圧延材は
その搬送方向の前，後端部側が反り上り又は反り下りし
ている場合があるから、その反り高さを考慮して圧延材
と、上側加熱コイル及び下側加熱コイルとの各距離を長
くする必要がある。そうすると上側加熱コイルと下側加
熱コイルとの間のギャップｇ（図２参照）が大きくな
る。However, since there are cases in which the front and rear end sides of the rolled material are warped up or down in the conveying direction, the rolled material is considered to be warped in consideration of the warped height. It is necessary to increase the distance between the upper heating coil and the lower heating coil. Then, the gap g (see FIG. 2) between the upper heating coil and the lower heating coil becomes large.
【０００６】ここで、 ｇ…上側加熱コイルと下側加熱コイルとの間のギャップ Ｚ(g) …ギャップｇのときの加熱コイルのコイルインピ
ーダンス（ｇの単調減減少関数） PF(g) …ギャップｇのときの力率（ｇの単調減少関数） η(g) …ギャップｇのときの加熱効率（ｇの単調減少関
数） Ｖ…加熱コイルの端子電圧 Ｉmax …加熱コイルの許容最大電流 Ｐmax (g) …ギャップｇのときの加熱コイルの許容最大
単機容量 Ｐ(g) …ギャップｇのときの加熱コイルの有効電力 Ｉ…加熱コイルの電流 Ｐ′max (g) …ギャップｇのときに加熱コイルの許容最
大単機容量を出力したときの圧延材が受取る加熱電力 とすると、加熱コイルの端子電圧Ｖは、 Ｖ＝Ｚ(g) Ｉ …(1) となり、加熱コイルの加熱電力Ｐ(g) は、 Ｐ(g) ＝ＶＩPF(g) ＝Ｚ(g) Ｉ2 PF(g) …(2) となり、加熱コイルの許容最大単機容量Ｐmax (g) は、 Ｐmax (g) ＝Ｚ(g) Ｉ2 max PF(g) …(3) となり、加熱コイルの許容最大単機容量を出力したとき
の圧延材が受取る加熱電力Ｐ′max (g) は Ｐ′max (g) ＝η(g) Ｚ(g) Ｉ2 max PF(g) …(4) となる。Here, g ... Gap between upper heating coil and lower heating coil Z (g) ... Coil impedance of heating coil at gap g (monotonically decreasing function of g) PF (g) ... Gap Power factor at g (monotonic decreasing function of g) η (g) ... Heating efficiency at gap g (monotonic decreasing function of g) V ... Terminal voltage of heating coil I max ... Maximum allowable current of heating coil P max (g)… Maximum allowable unit capacity of the heating coil when the gap is g P (g)… Active power of the heating coil when the gap is g I… Current of the heating coil P ′ max (g)… Heating when the gap is g Assuming that the heating power received by the rolled material when the maximum allowable single unit capacity of the coil is output, the terminal voltage V of the heating coil is V = Z (g) I ... (1), and the heating power P (g) of the heating coil is It is, P (g) = VIPF ( g) = Z (g) I 2 PF (g) ... (2) , and the heated co Le maximum allowable single machine capacity P max (g) is of rolled material when outputting P max (g) = Z ( g) I 2 max PF (g) ... (3) , and the maximum allowable single machine capacity of the heating coil the heating power is received P 'max (g) is P' max (g) = η (g) Z (g) I 2 max PF (g) ... (4).
【０００７】そして(2) 式よりギャップｇが大きくなる
とコイルインピーダンスＺ(g) が低下するとともに力率
PF(g) が低下する故、加熱コイルの加熱電力Ｐ(g) が低
下する。また(3) 式よりギャップｇが大きくなるとコイ
ルインピーダンスＺ(g) が低下するとともに力率PF(g)
が低下する故、加熱電力Ｐmax が低下する。更に(4)式
よりギャップｇが大きくなると、コイルインピーダンス
Ｚ(g) 、力率PF(g) 及び加熱効率ηがともに低下する
故、圧延材が受取る加熱電力Ｐ′max (g) が低下する。
それにより加熱能力が低下する。また(1) 式より加熱コ
イルの端子電圧Ｖが所定値以上であれば、ギャップｇが
大きくなると加熱コイルのインピーダンスＺ(g) が低下
するので、加熱コイルの電流Ｉが過大になる等の問題が
ある。When the gap g becomes larger than the equation (2), the coil impedance Z (g) decreases and the power factor
Since PF (g) decreases, the heating power P (g) of the heating coil decreases. Also, according to equation (3), when the gap g increases, the coil impedance Z (g) decreases and the power factor PF (g) increases.
Is decreased, the heating power P max is decreased. Further, when the gap g becomes larger than the formula (4), the coil impedance Z (g), the power factor PF (g) and the heating efficiency η are all decreased, so that the heating power P ′ max (g) received by the rolled material is decreased. .
This reduces the heating capacity. If the terminal voltage V of the heating coil is a predetermined value or more from the equation (1), the impedance Z (g) of the heating coil decreases as the gap g increases, so that the current I of the heating coil becomes excessive. There is.
【０００８】このような問題を解決するために、圧延材
の反り高さを画像装置で検出して、それに応じて圧延材
の端部と加熱コイルとの距離、つまりギャップを選定す
ることが考えられるが、圧延材の中間部におけるギャッ
プの設定は圧延材の板厚にのみ依存させているためギャ
ップが不適正になり加熱能力に過不足が生じる。また圧
延材のその搬送方向の前，後端部側のギャップについて
は衝突防止のみに着眼しているから、適正な加熱能力を
確保できない。更にギャップを選定するにあたって加熱
コイルの電流制約条件を考慮していないので、大きいギ
ャップで加熱しようとすると、加熱コイルには過大な電
流が流れて加熱コイルを焼損する虞れがある等の問題が
ある。In order to solve such a problem, it is considered that the warp height of the rolled material is detected by an image device and the distance between the end of the rolled material and the heating coil, that is, the gap is selected accordingly. However, since the setting of the gap in the middle part of the rolled material depends only on the plate thickness of the rolled material, the gap becomes improper and the heating capacity becomes insufficient. Further, since the gaps on the front and rear end sides of the rolled material in the conveying direction are focused only on the collision prevention, it is impossible to secure an appropriate heating capacity. Further, since the current constraint condition of the heating coil is not taken into consideration when selecting the gap, there is a problem in that if an attempt is made to heat with a large gap, an excessive current may flow in the heating coil and the heating coil may be burned out. is there.
【０００９】一方、特開昭53-70063号及び特開昭59-116
318 号の各公報に示されている誘導加熱装置は、圧延材
を加熱する誘導加熱コイルを、圧延材の搬送方向に対し
て直角な方向へ移動させて、圧延材を最適温度に加熱す
る構造を示したものであり、加熱コイルを上下動させて
圧延材に対し適正なギャップを保持して適正な加熱能力
を確保するようにしたものではない。本発明は斯かる問
題に鑑み、圧延材に対し加熱コイルを上下動させて、そ
の対向距離を適正に制御し、圧延材を適正に加熱する誘
導加熱装置を提供することを目的とする。On the other hand, JP-A-53-70063 and JP-A-59-116.
The induction heating device shown in each publication of No. 318 is a structure for heating the rolled material to an optimum temperature by moving the induction heating coil for heating the rolled material in a direction perpendicular to the conveying direction of the rolled material. However, the heating coil is not moved up and down to maintain an appropriate gap with respect to the rolled material to ensure an appropriate heating capacity. In view of such a problem, an object of the present invention is to provide an induction heating device that vertically moves a heating coil with respect to a rolled material, appropriately controls the facing distance thereof, and appropriately heats the rolled material.
【００１０】[0010]
【課題を解決するための手段】本発明に係る誘導加熱装
置は、圧延材の上面側及び下面側に加熱コイルを配置し
て圧延材を加熱する誘導加熱装置において、前記圧延材
の情報及び圧延材の昇温指令値に基づいて加熱電力を演
算する第１演算回路と、圧延材及び加熱コイル間のギャ
ップに対応するインピーダンス、力率、効率を演算する
第２演算回路と、該第２演算回路の演算結果に基づい
て、加熱コイルの電流上限値により得られる最大許容電
力を演算し、この演算値と効率とから圧延材が受け取る
加熱電力を演算する第３演算回路と、第１演算回路で求
めた加熱電力及び第３演算回路で求めた圧延材が受け取
る加熱電力、圧延材及び加熱コイル間のギャップ設定値
を演算する第４演算回路と、該第４演算回路が演算した
ギャップ設定値により、加熱コイルの位置を制御するギ
ャップ制御回路とを備えることを特徴とする。An induction heating apparatus according to the present invention is an induction heating apparatus for heating a rolled material by arranging heating coils on the upper surface side and the lower surface side of the rolled material, and A first arithmetic circuit that calculates heating power based on a temperature rise command value for the material, a second arithmetic circuit that calculates impedance, power factor, and efficiency corresponding to the gap between the rolled material and the heating coil, and the second arithmetic circuit Based on the calculation result of the circuit, the maximum allowable power obtained by the heating coil current upper limit value is calculated , and the rolled material receives from this calculation value and efficiency.
A third arithmetic circuit for calculating the heating power, determined by the first computation circuit
Received the heating power and the rolled material obtained by the third arithmetic circuit
A heating circuit, a fourth calculation circuit that calculates a gap setting value between the rolled material and the heating coil, and a gap control circuit that controls the position of the heating coil based on the gap setting value calculated by the fourth calculation circuit. Is characterized by.
【００１１】[0011]
【作用】加熱すべき圧延材の情報及び昇温指令値ΔＴに
より、圧延材を加熱すべき加熱電力Ｐref を、 Ｐref ＝ｖｔρＣＢｅ0.025/B ΔＴ×103 ［kW］／圧延材片側エッジ …(5) （但し、ｖ＝圧延材速度［m/s ］ Ｃ＝比熱［kJ／kg
℃］ ρ＝比重［ T/m3 ］ Ｂ＝昇温分布パラメータ ｔ＝圧延材厚さ［ｍ］） により求める。(4) 式と(5) 式とを比較して、 Ｐ′max (g) ≧Ｐref …(6) となるようなギャップｇの上限値を求め、 ｇref ≦ｇ（Ｐref ）＝ Ｐ′max -1（Ｐref ） となるようギャップ設定値ｇref を求める。求めたギャ
ップ設定値ｇref になすべく加熱コイルを制御する。こ
れにより、圧延材と加熱コイルとの間に適正なギャップ
を得て、圧延材を適正に加熱できる。The heating electric power P ref for heating the rolled material is P ref = vtρCBe 0.025 / B ΔT × 10 3 [kW] / edge on one side of the rolled material according to the information of the rolled material to be heated and the temperature rise command value ΔT. (5) (however, v = rolling material speed [m / s] C = specific heat [kJ / kg
[° C.] ρ = specific gravity [T / m 3 ] B = temperature rise distribution parameter t = rolled material thickness [m]) By comparing the equations (4) and (5), the upper limit value of the gap g such that P ′ max (g) ≧ P ref (6) is obtained, and g ref ≦ g (P ref ) = P The gap setting value g ref is calculated so as to be ′ max −1 (P ref ). The heating coil is controlled so as to achieve the obtained gap set value g ref . Thereby, an appropriate gap can be obtained between the rolled material and the heating coil, and the rolled material can be appropriately heated.
【００１２】[0012]
【実施例】以下本発明をその実施例を示す図面により詳
述する。図１は本発明に係る誘導加熱装置の構成を示す
模式的ブロック図である。加熱すべき圧延材に対する圧
延情報たる圧延材速度ｖ［m/s ］、比熱Ｃ［kJ／kg
℃］、比重ρ［ T/m3 ］、昇温分布パラメータＢ、圧延
材厚さｔ［ｍ］及び昇温指令値ΔＴが、加熱電力演算回
路10へ入力される。加熱電力演算回路10は入力された情
報により、圧延材を加熱すべき加熱電力Ｐref を(5) 式
により求める。そして、加熱電力演算回路10が演算した
加熱電力Ｐref はギャップ設定値演算回路11へ入力され
る。インピーダンス・力率・効率演算回路12は、オフラ
インの理論解析又は実験によって予め求めた、ギャップ
ｇの近似関数形又はテーブル値としてインピーダンスＺ
(g) 、力率PF(g) 、効率η(g) を演算する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is a schematic block diagram showing the configuration of an induction heating device according to the present invention. Rolling information for rolling material to be heated: rolling material speed v [m / s], specific heat C [kJ / kg]
[° C.], specific gravity ρ [T / m 3 ], temperature rise distribution parameter B, rolled material thickness t [m] and temperature rise command value ΔT are input to the heating power calculation circuit 10. The heating power calculation circuit 10 obtains the heating power P ref for heating the rolled material by the equation (5) based on the input information. Then, the heating power P ref calculated by the heating power calculation circuit 10 is input to the gap set value calculation circuit 11. The impedance / power factor / efficiency calculation circuit 12 calculates the impedance Z as an approximate function form or a table value of the gap g, which is obtained in advance by offline theoretical analysis or experiment.
(g), power factor PF (g) and efficiency η (g) are calculated.
【００１３】インピーダンス・力率・効率演算回路12が
演算したインピーダンスＺ(g) 、効率η(g) 及び力率PF
(g) は単機容量演算回路13へ入力され、単機容量演算回
路13は、(3) 式により加熱コイルの許容電流を最大にし
たときの加熱コイルの単機容量Ｐmax (g) を演算し、更
に加熱効率を考慮して(4) 式により、そのときの圧延材
が受取る加熱電力Ｐ′max (g) を演算する。単機容量演
算回路13が演算した加熱出力Ｐ′max (g) はギャップ設
定値演算回路11へ入力される。ギャップ設定値演算回路
11は、(5) 式と(4) 式とを比較し、Ｐ′max (g) ≧Ｐ
ref となるようなギャップｇの上限値を求め、ｇref ≦
ｇ（Ｐref ）＝ Ｐ′max -1（Ｐref ）となるようギャ
ップ設定値ｇref を演算する。Impedance / power factor / efficiency calculating circuit 12 calculates impedance Z (g), efficiency η (g) and power factor PF
(g) is input to the single unit capacity calculation circuit 13, and the single unit capacity calculation circuit 13 calculates the single unit capacity P max (g) of the heating coil when the allowable current of the heating coil is maximized by the formula (3), Further, in consideration of heating efficiency, the heating power P ′ max (g) received by the rolled material at that time is calculated by the equation (4). The heating output P ′ max (g) calculated by the unit capacity calculation circuit 13 is input to the gap set value calculation circuit 11. Gap setting value calculation circuit
11 compares Eqs . (5) and (4), and P'max (g) ≥ P
Find the upper limit of the gap g such that ref becomes g ref ≤
The gap setting value g ref is calculated so that g (P ref ) = P ′ max −1 (P ref ).
【００１４】実際には加熱能力の余裕、衝突防止の余裕
を考慮してギャップ設定値ｇref を決定する。ギャップ
設定値演算回路11が演算したギャップ設定値ｇref は、
ギャップ制御回路14へ入力される。ギャップ制御回路14
は、入力されたギャップ設定指令値ｇref に応じて、上
側加熱コイル２，２及び下側加熱コイル３，３を上下動
させる制御をして、個別に位置決めする。このときの上
側加熱コイル２，２、下側加熱コイル３，３と圧延材４
との距離ｘ，ｙ及び圧延材４の厚さｔは（図１参照）、
ｘ＋ｙ＝ｇref −ｔとなるように配分する。Actually, the gap setting value g ref is determined in consideration of the margin of heating capacity and the margin of collision prevention. The gap setting value g ref calculated by the gap setting value calculation circuit 11 is
It is input to the gap control circuit 14. Gap control circuit 14
Controls the upper heating coils 2 and 2 and the lower heating coils 3 and 3 up and down according to the input gap setting command value g ref , and positions them individually. At this time, the upper heating coils 2 and 2, the lower heating coils 3 and 3 and the rolled material 4
And the thickness t of the rolled material 4 are (see FIG. 1),
Allocate so that x + y = g ref −t.
【００１５】このようにして、理論解析又は実験により
予め求めた近似関数形、インピーダンスＺ(g) 、力率PF
(g) 、効率η(g) と、昇温指令値ΔＴ及び圧延情報とに
より求めた加熱電力Ｐref から所定の加熱を行うのに許
容されるギャップｇの上限値を求め、それに応じてギャ
ップ設定値ｇref を求めることにより、所定の加熱能力
を得るのに許容できるギャップｇの設定が可能になり、
加熱コイルの電流が過大になることがない。そして圧延
材の反りを検出する反り検出器と組合せることにより、
圧延材と加熱コイルとの衝突を防止できる。In this way, the approximate function form, impedance Z (g), and power factor PF obtained in advance by theoretical analysis or experiment are obtained.
(g), the efficiency η (g), and the heating power P ref obtained from the temperature increase command value ΔT and the rolling information, the upper limit of the gap g allowed for performing the predetermined heating is obtained, and the gap is calculated accordingly. By obtaining the set value g ref , it becomes possible to set the gap g that is allowable to obtain a predetermined heating capacity,
The heating coil current does not become excessive. And by combining with a warpage detector that detects the warpage of rolled material,
It is possible to prevent the rolled material from colliding with the heating coil.
【００１６】[0016]
【発明の効果】以上の如く本発明にあっては、圧延材の
情報及び圧延材の昇温指令値に基づいて加熱電力を演算
し、これと第２演算回路で求めたインピーダンス、力
率、効率から加熱コイルの電流上限値より得られる最大
許容電力を演算し、この演算値と加熱効率とから圧延材
が受け取るべき加熱電力、換言すれば最大加熱電力を求
め、この最大加熱電力が第１演算回路で求めた加熱電力
を下回らない条件のもとで定めたギャップ設定を行うこ
とで、圧延材を、その中間部、反りが生じた両端部の如
何にかかわらず正確なギャップ調節によって適正に加熱
することが可能となる。 Is a as the present invention or of the invention the effect of ## of the rolled material
Calculate heating power based on information and command value for temperature rise of rolled material
And the impedance and force obtained from this and the second arithmetic circuit
Maximum obtained from heating coil current upper limit value from rate and efficiency
Allowable power is calculated, and the rolled material is calculated from this calculated value and heating efficiency.
The heating power that should be received, in other words the maximum heating power
Therefore, this maximum heating power is the heating power calculated by the first arithmetic circuit.
The gap setting specified under the condition that
And the rolled material at the middle part and at both ends where warpage occurs.
Proper heating with accurate gap adjustment, no matter what
It becomes possible to do .
【図１】本発明に係る誘導加熱装置の構成を示す模式的
ブロック図である。FIG. 1 is a schematic block diagram showing a configuration of an induction heating device according to the present invention.
【図２】従来の誘導加熱装置による圧延材の加熱状態を
示す模式的側面図である。FIG. 2 is a schematic side view showing a heating state of a rolled material by a conventional induction heating device.
２ 上側加熱コイル ３ 下側加熱コイル 10 加熱電力演算回路 11 ギャップ設定値演算回路 12 インピーダンス・力率・効率演算回路 13 単機容量演算回路 14 ギャップ制御回路 2 Upper heating coil 3 Lower heating coil 10 Heating power calculation circuit 11 Gap setting value calculation circuit 12 Impedance / power factor / efficiency calculation circuit 13 Single unit capacity calculation circuit 14 Gap control circuit
Claims (1)
を配置して圧延材を加熱する誘導加熱装置において、前
記圧延材の情報及び圧延材の昇温指令値に基づいて加熱
電力を演算する第１演算回路と、圧延材及び加熱コイル
間のギャップに対応するインピーダンス、力率、効率を
演算する第２演算回路と、該第２演算回路の演算結果に
基づいて、加熱コイルの電流上限値により得られる最大
許容電力を演算し、この演算値と効率とから圧延材が受
け取る加熱電力を演算する第３演算回路と、第１演算回
路で求めた加熱電力及び第３演算回路で求めた圧延材が
受け取る加熱電力、圧延材及び加熱コイル間のギャップ
設定値を演算する第４演算回路と、該第４演算回路が演
算したギャップ設定値により、加熱コイルの位置を制御
するギャップ制御回路とを備えることを特徴とする圧延
材の誘導加熱装置。1. In an induction heating apparatus for heating a rolled material by arranging heating coils on the upper surface side and the lower surface side of the rolled material, the heating power is calculated based on the rolled material information and the temperature command value of the rolled material. Based on the calculation result of the first calculation circuit, the impedance corresponding to the gap between the rolled material and the heating coil, the power factor, and the efficiency, and the second calculation circuit. The maximum allowable power obtained from the value is calculated, and the rolled material is received from this calculated value and efficiency.
A third arithmetic circuit for calculating the heating power take only, rolled material is obtained in the heating power, and the third arithmetic circuit obtained in the first arithmetic circuit
A fourth arithmetic circuit for calculating a heating power received , a gap setting value between the rolled material and the heating coil, and a gap control circuit for controlling the position of the heating coil by the gap setting value calculated by the fourth arithmetic circuit. An induction heating device for rolled material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4131920A JP2677114B2 (en) | 1992-04-22 | 1992-04-22 | Induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4131920A JP2677114B2 (en) | 1992-04-22 | 1992-04-22 | Induction heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05299164A JPH05299164A (en) | 1993-11-12 |
| JP2677114B2 true JP2677114B2 (en) | 1997-11-17 |
Family
ID=15069290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4131920A Expired - Fee Related JP2677114B2 (en) | 1992-04-22 | 1992-04-22 | Induction heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2677114B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4644379B2 (en) * | 2001-04-17 | 2011-03-02 | 電気興業株式会社 | High frequency induction heating method and apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628095B2 (en) * | 1984-01-18 | 1994-04-13 | 松下電器産業株式会社 | Magnetic recording tape |
| JPH0744064B2 (en) * | 1988-12-21 | 1995-05-15 | 三菱電機株式会社 | Induction heating device |
-
1992
- 1992-04-22 JP JP4131920A patent/JP2677114B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05299164A (en) | 1993-11-12 |
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