JP2000208241A - Heating control method for induction heating apparatus - Google Patents
Heating control method for induction heating apparatusInfo
- Publication number
- JP2000208241A JP2000208241A JP11007296A JP729699A JP2000208241A JP 2000208241 A JP2000208241 A JP 2000208241A JP 11007296 A JP11007296 A JP 11007296A JP 729699 A JP729699 A JP 729699A JP 2000208241 A JP2000208241 A JP 2000208241A
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- Prior art keywords
- temperature
- induction heating
- heating device
- heated
- amount
- 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、被加熱材の温度
を、精度よく目標温度に制御する誘導加熱装置の制御方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an induction heating device for precisely controlling the temperature of a material to be heated to a target temperature.
【０００２】[0002]
【従来の技術】従来、誘導加熱装置による鋼板の温度制
御方法としては、例えば、特公昭60−53438（以下、
「先行技術１」という）の誘導加熱温度制御方法に開示
されているように、長手方向に寸法が異なるそれぞれの
被加熱材を複数の区分に分割し、分割された各区分ごと
に昇温量を定めて、該当する部分が誘導加熱装置を通過
する予定速度により、昇温量を調整する方法などがあ
る。2. Description of the Related Art Conventionally, as a method for controlling the temperature of a steel sheet by an induction heating device, for example, Japanese Patent Publication No.
As disclosed in the induction heating temperature control method of “Prior Art 1”, each material to be heated having a different dimension in the longitudinal direction is divided into a plurality of sections, and a temperature increase amount is set for each of the divided sections. There is a method of adjusting the temperature increase amount according to the scheduled speed at which the corresponding portion passes through the induction heating device.
【０００３】また、特公昭６１−３１９４６（以下、
「先行技術２」という）には、被加熱材の加熱前温度と
加熱後温度との間の温度差が目標昇温量と一致するよう
に、偏差に応じた比例制御フイードバックを行う制御系
が提案されており、事前設定による誤差を補正できるよ
うな制御系が構成されている。In addition, Japanese Patent Publication No. 61-31946 (hereinafter referred to as Japanese Patent Publication No.
A control system that performs proportional control feedback in accordance with the deviation so that the temperature difference between the pre-heating temperature and the post-heating temperature of the material to be heated matches the target temperature increase amount is referred to as “prior art 2”. A control system has been proposed that can correct an error due to a preset setting.
【０００４】[0004]
【発明が解決しょうとする課題】しかしながら、先行技
術１の手法は、主として鋼管の冷材加熱方法として考案
されたものである。従って、熱間圧延におけるように、
高温の状態でしかも時々刻々温度が変化する対象に関し
ては、誘導加熱装置入り側における被加熱鋼材の温度を
検出しないと、正確な加熱ができないという問題点があ
る。However, the technique of the prior art 1 is mainly devised as a method of heating a cold material for a steel pipe. Thus, as in hot rolling,
There is a problem that accurate heating cannot be performed on an object whose temperature changes every moment in a high temperature state unless the temperature of the steel material to be heated is detected on the inlet side of the induction heating device.
【０００５】また、誘導加熱装置によると、その性質
上、被加熱材の表面が主として加熱されるため、加熱前
後において、被加熱材の厚み方向の温度分布が大きく変
化する。先行技術１においては、被加熱材の厚み方向の
温度分布を考慮していないので、誘導加熱装置への供給
電力量を決定する際に、正確な供給電力量を決定できな
いという問題点がある。[0005] Further, according to the induction heating device, the surface of the material to be heated is mainly heated by its nature, so that the temperature distribution in the thickness direction of the material to be heated greatly changes before and after heating. In prior art 1, since the temperature distribution in the thickness direction of the material to be heated is not taken into account, there is a problem in that when determining the amount of power to be supplied to the induction heating device, it is not possible to accurately determine the amount of power to be supplied.
【０００６】さらに、先行技術２においては、誘導加熱
装置の出側における温度検出値と目標温度との偏差をフ
イードバックする際においても、被加熱材の材質、断面
積、移動速度、昇温量などにより、被加熱材の表面温度
と平均温度との間の関係が異なるため、被加熱材の表面
温度を目標温度に近づけるようなフイードバックを施し
ても、被加熱材の平均温度にばらつきが生じて、結果的
には、温度制御の精度を悪化させるという問題点があ
る。Further, in the prior art 2, when feeding back the deviation between the temperature detection value at the outlet side of the induction heating device and the target temperature, the material of the material to be heated, the cross-sectional area, the moving speed, the amount of temperature rise, etc. Therefore, the relationship between the surface temperature of the material to be heated and the average temperature is different, so that even if a feedback is performed such that the surface temperature of the material to be heated approaches the target temperature, the average temperature of the material to be heated varies. As a result, there is a problem that the accuracy of the temperature control is deteriorated.
【０００７】また、被加熱材の温度分布が収束する位置
に温度検出器を設置することも考えられるが、その方法
によると、温度検出器と誘導加熱装置との間の距離が大
きくなるので、フイードバックする際にかなりの時間遅
れが生じて、その制御性能が低下するという問題点があ
る。It is also conceivable to install a temperature detector at a position where the temperature distribution of the material to be heated converges. However, according to this method, the distance between the temperature detector and the induction heating device is increased. There is a problem that a considerable time delay occurs at the time of feedback, and the control performance is reduced.
【０００８】本発明の目的は、上述した従来技術の問題
点を解決して、被加熱材の材質、断面積、移動速度、昇
温量の大小に関わらず、被加熱材の温度を、精度よく目
標温度に制御することができる誘導加熱装置の制御方法
を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art, and to accurately determine the temperature of a material to be heated regardless of the material, cross-sectional area, moving speed, and amount of temperature rise of the material to be heated. An object of the present invention is to provide a control method of an induction heating device that can well control a target temperature.
【０００９】[0009]
【課題を解決するための手段】発明者等は、上述した従
来の問題点を解決すべく鋭意研究を重ねた。その結果、
差分方程式を用いて、被加熱材の厚み方向の温度分布を
求め、温度分布から誘導加熱装置に供給する電力量を求
め、求められた電力量によって鋼材の加熱を制御するこ
とによって、被加熱材を精度よく目標温度に加熱するこ
とができることを知見した。Means for Solving the Problems The inventors have conducted intensive studies to solve the above-mentioned conventional problems. as a result,
By using the difference equation, the temperature distribution in the thickness direction of the material to be heated is obtained, the amount of power supplied to the induction heating device is obtained from the temperature distribution, and the heating of the steel material is controlled by the obtained amount of power. Was found to be able to be accurately heated to the target temperature.
【００１０】この発明の方法は、上述した知見に基づい
てなされたもので、この発明の誘導加熱装置の加熱制御
方法の第１の態様は、誘導加熱装置の入り側における被
加熱材の測定温度、前記誘導加熱装置出側における被加
熱材の加熱目標温度、および、被加熱材の測定移動速度
から、差分方程式を用いて、被加熱材の厚み方向の温度
分布を求め、このようにして求められた前記温度分布に
よって前記誘導加熱装置に供給する電力量を演算し、演
算された前記電力量によって鋼材の加熱を制御すること
を特徴とするものである。[0010] The method of the present invention has been made based on the above-mentioned findings, and a first aspect of the heating control method of the induction heating device according to the present invention is a method of measuring the temperature of a material to be heated at the entrance side of the induction heating device. From the induction heating device outlet side, the target temperature of the material to be heated, and the measured moving speed of the material to be heated, using a difference equation, the temperature distribution in the thickness direction of the material to be heated is obtained. The amount of electric power supplied to the induction heating device is calculated based on the obtained temperature distribution, and the heating of the steel material is controlled based on the calculated amount of electric power.
【００１１】この発明の誘導加熱装置の加熱制御方法の
第２の態様は、誘導加熱装置の入り側における被加熱材
の測定温度、および、被加熱材の測定移動速度から、差
分方程式を用いて、前記誘導加熱装置の出側における被
加熱材の厚み方向の温度分布を推定し、このようにして
得られた前記温度分布、および、前記誘導加熱温度装置
の出側における測定温度から、被加熱材の厚み方向の平
均温度を推定し、前記目標温度と推定した前記平均温度
との偏差を求め、前記偏差を前記誘導加熱装置に供給す
る電力量へフィードバック制御して鋼材の加熱を制御す
ることを特徴とするである。A second aspect of the heating control method for an induction heating device according to the present invention uses a difference equation based on a measured temperature of a material to be heated at the entrance side of the induction heating device and a measured moving speed of the material to be heated. The temperature distribution in the thickness direction of the material to be heated at the outlet side of the induction heating device is estimated, and the temperature distribution obtained in this manner, and the measured temperature at the outlet side of the induction heating temperature device, Estimating the average temperature in the thickness direction of the material, calculating the deviation between the target temperature and the estimated average temperature, and controlling the heating of the steel material by performing feedback control on the deviation to the amount of power supplied to the induction heating device. It is characterized by the following.
【００１２】この発明の誘導加熱装置の加熱制御方法の
第３の態様は、この発明の方法の第１の態様によって演
算された前記電力量と、この発明の方法の第２の態様に
よって求めた前記偏差を加算し、得られた電力量を、前
記誘導加熱装置に供給する電力量として鋼材の加熱を制
御することを特徴とするものである。According to a third aspect of the heating control method for the induction heating apparatus of the present invention, the electric energy calculated by the first aspect of the method of the present invention and the electric energy calculated by the second aspect of the method of the present invention are obtained. The method is characterized in that heating of the steel material is controlled by adding the deviation and using the obtained electric power as the electric power supplied to the induction heating device.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照しながら説明する。 （第1の実施の形態）第１の実施の形態においては、誘
導加熱装置の入り側における加熱材の測定温度、誘導加
熱装置出側における被加熱材の加熱目標温度、および、
被加熱材の測定移動速度から、差分方程式を用いて、被
加熱材の厚み方向の温度分布を求め、このようにして求
められた温度分布によって誘導加熱装置に供給する電力
量を演算し、演算された電力量によって鋼材の加熱を制
御する。Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) In the first embodiment, the measured temperature of the heating material at the entrance side of the induction heating device, the target heating temperature of the material to be heated at the exit side of the induction heating device, and
From the measured moving speed of the material to be heated, the temperature distribution in the thickness direction of the material to be heated is obtained by using a difference equation, and the amount of power supplied to the induction heating device is calculated based on the temperature distribution thus obtained. The heating of the steel material is controlled by the supplied electric energy.
【００１４】測定温度は加熱装置の入り側に設置した温
度検出器によって検出される温度信号を使用し、測定移
動速度は被加熱材の移動速度を検出する速度検出器によ
って検出される速度信号を使用する。The measured temperature uses a temperature signal detected by a temperature detector installed on the entrance side of the heating device, and the measured moving speed is a speed signal detected by a speed detector that detects the moving speed of the material to be heated. use.
【００１５】図1は本発明の第1の実施の形態に係る加熱
装置を概略構成を示す側面図である。1は誘導加熱装
置、2は被加熱材を示す。被加熱材２は、誘導加熱装置
１の中を移動し、加熱される。3は誘導加熱装置１の入
り口付近に備え付けられて、被加熱材２の温度を検出す
る温度検出器であり、4は誘導加熱装置の出口付近に備
え付けられ、被加熱材２の温度を検出する温度検出器で
ある。6は上記温度検出器３、４によって求められた温
度から、誘導加熱装置１に供給する電力量を計算する制
御装置を示す。5は誘導加熱装置１の出力を、制御装置6
によって与えられた値になるように制御を行う、誘導加
熱装置１の制御装置である。FIG. 1 is a side view showing a schematic configuration of a heating device according to a first embodiment of the present invention. 1 indicates an induction heating device, and 2 indicates a material to be heated. The material to be heated 2 moves in the induction heating device 1 and is heated. Reference numeral 3 denotes a temperature detector provided near the entrance of the induction heating device 1 to detect the temperature of the material 2 to be heated, and 4 denotes a temperature detector provided near the exit of the induction heating device to detect the temperature of the material 2 to be heated. It is a temperature detector. Reference numeral 6 denotes a control device that calculates the amount of electric power supplied to the induction heating device 1 from the temperatures obtained by the temperature detectors 3 and 4. 5 is the output of the induction heating device 1 and the control device 6
Is a control device of the induction heating device 1 that performs control so as to be a value given by
【００１６】まず、熱伝導方程式の差分式から、被加熱
材の温度変化を表す式（１）を求める。Ｋは式（２）、
ｈは式（３）の通りである。 ただし、nb：被加熱材の厚み方向の分割数、ｔ：被加熱
材の厚さ、Xi,j：時刻jにおける厚み方向iの温度（1≦i
≦nb）、Cｐ：比熱、h：厚み方向分割幅、dt：サンプル
周期、Ｑ1：外部から被加熱材に加わる熱量、λ：熱伝
導率、ρ：密度である。First, an equation (1) representing the temperature change of the material to be heated is obtained from the difference equation of the heat conduction equation. K is the equation (2),
h is as in equation (3). Here, nb: the number of divisions in the thickness direction of the material to be heated, t: the thickness of the material to be heated, X i, j : the temperature in the thickness direction i at time j (1 ≦ i
≦ nb), Cp: specific heat, h: thickness direction division width, dt: sample period, Q 1 : amount of heat applied to the material to be heated from the outside, λ: thermal conductivity, ρ: density.
【００１７】式（1）から、被加熱材をその厚み方向に
三分割した温度計算式は、式（４）のとおりである。 From equation (1), the temperature calculation equation for dividing the material to be heated into three in the thickness direction is as shown in equation (4).
【００１８】式（1）の境界条件項Ｑ1は、大気からの熱
伝達と、加熱装置から供給される熱量からなり、式
（５）、式（６）、式（７）によって表される。 ただし、ｕb：加熱装置への供給熱量、ε：放射率、
σ：ステファン−ボルツマン定数、ρ：密度、Cp：比
熱、β：加熱効率、Ｔa：大気温度、f（i）（i＝1，
3）：誘導起電力による鋼材厚み方向の電力密度分布で
ある。The boundary condition term Q 1 in equation (1) consists of heat transfer from the atmosphere and the amount of heat supplied from the heating device, and is expressed by equations (5), (6), and (7). . However, u b: amount of heat supplied to the heating device, epsilon: emissivity,
σ: Stefan-Boltzmann constant, ρ: density, C p : specific heat, β: heating efficiency, T a : atmospheric temperature, f (i) (i = 1,
3): Power density distribution in the steel thickness direction due to induced electromotive force.
【００１９】ここで、被加熱材の温度をｘ0と仮定し、
温度ｘ0を中心に式（6）を式（８）、式（９）で示すよ
うに線形化する。 式（9）を用いて、式（4）を整理すると、式（１０）を
得る。 ただし、ｘ（ｊ）は式（１１）の通り、Ｅは式（１２）
の通り、Ａは式（１３）の通り、Ｑは式（１４）の通り
である。 Here, assuming that the temperature of the material to be heated is x 0 ,
Equation (6) around the temperature x 0 Equation (8), to linearize as shown in equation (9). By rearranging equation (4) using equation (9), equation (10) is obtained. Here, x (j) is as in equation (11), and E is as in equation (12).
As described above, A is as shown in equation (13), and Q is as shown in equation (14).
【００２０】式(８)において、行列Ｅの逆行列を右側か
ら掛けることにより、式（１５）、式（１６）を得る。 ただし、Ａxは式（１７）の通り、ｘcは式（１８）の通
り、ｂxは式（１９）の通りである。 In equation (8), by multiplying the inverse matrix of matrix E from the right, equations (15) and (16) are obtained. Here, A x is as in equation (17), x c is as in equation (18), and b x is as in equation (19).
【００２１】さらに、式（２０）を用いて、被加熱材の
平均温度ｘ1,jを得る。ただし、Ｃxは式（２１）の通り
である。 Further, the average temperature x 1, j of the material to be heated is obtained by using the equation (20). Here, C x is as shown in Expression (21).
【００２２】ここで、目標温度が与えられた場合の誘導
加熱装置への供給電力量を求める。図１おける区間１、
区間２、区間３の距離をそれぞれ、１１、１２、１３と
し、更に、それぞれの区間１、２、３を通過する速度を
それぞれ、ｖｌ、ｖ２、ｖ３とする。誘導加熱装置入り側
の温度検出器位置での被加熱材の温度分布をx(k)とする
と、区間１の終端での温度は、式（２２）、式（２３）
で表される。 加熱装置への供給電力量をｕbとすると、区間２の終端で
の温度は、式（２４）、式（２５）で表される。 さらに区間３の終端での温度は、式（２６）、式（２
７）、式（２８）で表される。 Here, the amount of power supplied to the induction heating device when the target temperature is given is determined. Section 1 in FIG. 1,
The distances of the sections 2 and 3 are respectively 11, 12, and 13, and the velocities passing through the sections 1, 2, and 3 are respectively vl, v2, and v3. Assuming that the temperature distribution of the material to be heated at the temperature detector position on the entrance side of the induction heating device is x (k), the temperature at the end of the section 1 is expressed by Expressions (22) and (23).
It is represented by When the power supplied to the heating device and u b, the temperature at the end of the section 2, the formula (24), the formula (25). Further, the temperature at the end of the section 3 is calculated by the equations (26) and (2).
7), expressed by equation (28).
【００２３】この温度が目標温度Ｔrに等しくなるよう
に供給電力量ｕbを決めればよいので、式（２９）から、
目標温度Ｔrにするための加熱装置への供給電力量は、
式（３０）によって与えられる。式（３０）に表される
電力指令ｕbを誘導加熱装置から出力することによって、
被加熱材を加熱目標温度に精度よく加熱することができ
る。 [0023] Since the temperature may be determined the amount of power supply u b to equal the target temperature T r, the equation (29),
The amount of power supplied to the heating device to reach the target temperature Tr is
It is given by equation (30). By outputting a power command u b represented in formula (30) from the induction heating device,
The material to be heated can be precisely heated to the heating target temperature.
【００２４】(第２の実施の形態)第２の実施の形態にお
いては、誘導加熱装置の入り側における被加熱材の測定
温度、および、被加熱材の測定移動速度から、差分方程
式を用いて、誘導加熱装置の出側における被加熱材の厚
み方向の温度分布を推定し、このようにして得られた温
度分布、および、誘導加熱温度装置の出側における測定
温度から、被加熱材の厚み方向の平均温度を推定し、目
標温度と推定した平均温度との偏差を求め、偏差を誘導
加熱装置に供給する電力量へフィードバック制御して鋼
材の加熱を制御する。(Second Embodiment) In a second embodiment, a difference equation is used from the measured temperature of the material to be heated at the entrance side of the induction heating device and the measured moving speed of the material to be heated. Estimate the temperature distribution in the thickness direction of the material to be heated on the outlet side of the induction heating device, and obtain the thickness of the material to be heated from the temperature distribution thus obtained, and the measured temperature on the output side of the induction heating temperature device. The average temperature in the direction is estimated, the deviation between the target temperature and the estimated average temperature is obtained, and the deviation is fed back to the amount of electric power supplied to the induction heating device to control the heating of the steel material.
【００２５】即ち、上記差分方程式から求められた温度
分布を利用して、誘導加熱装置の出側に位置する温度検
出器位置における粗バーの厚み方向の平均温度を推定す
る。次いで、誘導加熱装置の出側における目標温度と、
上記推定平均温度との偏差のフィードバックを行う。That is, the average temperature in the thickness direction of the coarse bar at the position of the temperature detector located on the outlet side of the induction heating device is estimated using the temperature distribution obtained from the above difference equation. Then, the target temperature at the outlet side of the induction heating device,
The deviation from the estimated average temperature is fed back.
【００２６】式(３０)によって、誘導加熱装置への供給
電力量が与えられると、誘導加熱装置の出側に位置する
温度検出器位置における温度分布が式（３１）によって
得られる。 ただし、ｕｊ：誘導加熱装置での供給電力量実績であ
る。When the amount of electric power supplied to the induction heating device is given by Expression (30), the temperature distribution at the temperature detector located on the outlet side of the induction heating device is obtained by Expression (31). Here, uj is the actual amount of power supplied by the induction heating device.
【００２７】これにより、フィードバック量は、式（３
２）、式（３３）で与えられる。 ただし、Ｔｅ：誘導加熱装置の出側の温度検出器位置に
おける推定平均温度、ｋ fb：フィードバックゲイン、ｕ
fb：フィードバック量である。As a result, the feedback amount is given by the equation (3)
2), given by equation (33).However, Te: at the temperature detector position on the outlet side of the induction heating device
Estimated average temperature in k fb: Feedback gain, u
fb: Feedback amount.
【００２８】上記で推定した誘導加熱装置の出側の温度
計位置における平均温度を用いて、平均温度と目標温度
との間の偏差のフィードバックを行う。これにより、被
加熱材の材質、断面積、移動速度、昇温量の大小に関わ
らず、被加熱材の温度を、精度よく目標温度に制御する
ことができる。The deviation between the average temperature and the target temperature is fed back using the average temperature at the thermometer position on the outlet side of the induction heating device estimated above. Thus, the temperature of the material to be heated can be accurately controlled to the target temperature regardless of the material, cross-sectional area, moving speed, and amount of temperature rise of the material to be heated.
【００２９】(第３の実施の形態)第３の実施の形態にお
いては、第１の実施の形態で求められた誘導加熱装置へ
の供給電力量ｕbと第２の実施の形態で求められた誘導
加熱装置への供給電力量ｕfbを用いて、式（３４）で与
えられるｕaを誘導加熱装置への供給電力量とする。 [0029] In (Third Embodiment) A third embodiment, obtained by the amount of power supplied to the induction heating device obtained in the first embodiment u b in the second embodiment Using the power supply amount u fb to the induction heating device, u a given by Expression (34) is set as the power supply amount to the induction heating device.
【００３０】これにより、被加熱材の材質、断面積、移
動速度、昇温量の大小に関わらず、被加熱材の温度を、
精度よく目標温度に制御することができる。Thus, regardless of the material, cross-sectional area, moving speed, and amount of temperature rise of the material to be heated, the temperature of the material to be heated is
The target temperature can be controlled accurately.
【００３１】[0031]
【発明の効果】以上の構成により、誘導加熱装置を使用
し、被加熱材を誘導加熱装置出側の目標温度に加熱する
際、この発明の第１の態様では、誘導加熱装置入り側の
温度検出器で検出される温度信号と速度検出器から検出
される速度信号から、被加熱材の厚み方向の温度分布し
た差分方程式を利用し算出された電力量を与えることに
より、被加熱材を精度よく目標温度に制御すること一が
できる。According to the above-described structure, when the material to be heated is heated to the target temperature on the exit side of the induction heating device by using the induction heating device, the first embodiment of the present invention provides the temperature on the entrance side of the induction heating device. By applying the power calculated from the temperature signal detected by the detector and the speed signal detected by the speed detector using the difference equation in which the temperature distribution in the thickness direction of the material to be heated is applied, the accuracy of the material to be heated can be improved. It is possible to control the target temperature well.
【００３２】また、この発明の第２の態様では、誘導加熱
装置入り側の温度検出器で検出される温度信号と速度検
出器から検出される速度信号から、被加熱材の厚み方向
の温度分布した差分方程式を利用し、誘導加熱装置出側
での温度分布を推定し、これと、誘導加熱装置出側での温
度検出器から得られる温度信号から、誘導加熱装置出側
の温度検出器位置での平均温度を推定し、フィードバッ
クを行うことにより、被加熱材を精度よく目標温度に制
御することができる。In the second aspect of the present invention, the temperature distribution in the thickness direction of the material to be heated is determined from the temperature signal detected by the temperature detector on the inlet side of the induction heating device and the speed signal detected by the speed detector. Using the difference equation obtained, the temperature distribution on the outlet side of the induction heating device is estimated, and from the temperature signal obtained from the temperature detector on the outlet side of the induction heating device, the temperature detector position on the outlet side of the induction heating device is estimated. By estimating the average temperature in the above, and performing feedback, it is possible to accurately control the material to be heated to the target temperature.
【００３３】さらに、この発明の第３の態様では、上記第
１の態様で算出された誘導加熱装置の電力量と第２の態
様により得られたフィードバックを加算した値を誘導加
熱装置の電力量とすることにより、被加熱材を精度よく
目標温度に制御することができる。Further, in a third aspect of the present invention, a value obtained by adding the electric energy of the induction heating device calculated in the first aspect and the feedback obtained in the second aspect is used as an electric energy of the induction heating device. By doing so, the material to be heated can be accurately controlled to the target temperature.
【図１】図１は、本発明の第１の実施形態による誘導加
熱制御装置を表す側面図である。FIG. 1 is a side view illustrating an induction heating control device according to a first embodiment of the present invention.
【図２】図２は、本発明の第２の実施形態による誘導加
熱制御装置を表す側面図である。FIG. 2 is a side view illustrating an induction heating control device according to a second embodiment of the present invention.
【図３】図３は、本発明の第１および第２の実施形態に
よる誘導加熱制御装置における演算を表すブロック図で
ある。FIG. 3 is a block diagram showing a calculation in the induction heating control device according to the first and second embodiments of the present invention.
１．誘導加熱装置 ２．被加熱材 ３．加熱装置の入り側における温度検出器 ４．加熱装置の出側における温度検出器 ５．供給電力計算装置 ６．制御装置 ７．速度検出器 1. Induction heating device 2. Heated material 3. 3. Temperature detector at the entrance of the heating device 4. Temperature detector at the outlet of the heating device Supply power calculator 6. Control device 7. Speed detector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 関根 宏 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 中野 聖 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 本屋敷 洋一 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 3K059 AB19 AB26 AC09 AC33 AC54 AC62 AD04 BD02 BD12 BD15 CD02 CD06 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Hiroshi Sekine 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Seiji Nakano 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Sun Inside Honko Co., Ltd. (72) Inventor Yoichi Honashiki 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term in Nippon Kokan Co., Ltd. 3K059 AB19 AB26 AC09 AC33 AC54 AC62 AD04 BD02 BD12 BD15 CD02 CD06
Claims (3)
の測定温度、前記誘導加熱装置出側における被加熱材の
加熱目標温度、および、被加熱材の測定移動速度から、
差分方程式を用いて、被加熱材の厚み方向の温度分布を
求め、このようにして求められた前記温度分布によって
前記誘導加熱装置に供給する電力量を演算し、演算され
た前記電力量によって鋼材の加熱を制御することを特徴
とする、誘導加熱装置の加熱制御方法。The temperature of a material to be heated on the inlet side of the induction heating device, the target temperature of the material to be heated on the outlet side of the induction heating device, and the measured moving speed of the material to be heated are:
Using the difference equation, the temperature distribution in the thickness direction of the material to be heated is obtained, the amount of power supplied to the induction heating device is calculated based on the temperature distribution thus obtained, and the steel material is calculated based on the calculated amount of power. A method for controlling heating of an induction heating device, comprising controlling heating of a heating device.
の測定温度、および、被加熱材の測定移動速度から、差
分方程式を用いて、前記誘導加熱装置の出側における被
加熱材の厚み方向の温度分布を推定し、このようにして
得られた前記温度分布、および、前記誘導加熱温度装置
の出側における測定温度から、被加熱材の厚み方向の平
均温度を推定し、前記目標温度と推定した前記平均温度
との偏差を求め、前記偏差を前記誘導加熱装置に供給す
る電力量へフィードバック制御して鋼材の加熱を制御す
ることを特徴とする、誘導加熱装置の加熱制御方法。2. The thickness direction of the material to be heated at the exit side of the induction heating device, using a difference equation, based on the measured temperature of the material to be heated at the entrance side of the induction heating device and the measured moving speed of the material to be heated. The temperature distribution obtained in this way, the temperature distribution obtained in this way, from the measured temperature at the outlet side of the induction heating temperature device, to estimate the average temperature in the thickness direction of the material to be heated, the target temperature and A heating control method for an induction heating device, wherein a deviation from the estimated average temperature is obtained, and the deviation is fed back to an electric power supplied to the induction heating device to control heating of the steel material.
と、請求項２によって求めた前記偏差を加算し、得られ
た電力量を、前記誘導加熱装置に供給する電力量として
鋼材の加熱を制御することを特徴とする、誘導加熱装置
の加熱制御方法。3. The heating of a steel product is performed by adding the power amount calculated according to claim 1 and the deviation obtained according to claim 2 as the power amount supplied to the induction heating device. A heating control method for an induction heating device, characterized by controlling.
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|---|---|---|---|
| JP00729699A JP3767663B2 (en) | 1999-01-14 | 1999-01-14 | Heating control method of induction heating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00729699A JP3767663B2 (en) | 1999-01-14 | 1999-01-14 | Heating control method of induction heating device |
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| Publication Number | Publication Date |
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| JP2000208241A true JP2000208241A (en) | 2000-07-28 |
| JP3767663B2 JP3767663B2 (en) | 2006-04-19 |
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|---|---|---|---|
| JP00729699A Expired - Fee Related JP3767663B2 (en) | 1999-01-14 | 1999-01-14 | Heating control method of induction heating device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003301223A (en) * | 2002-02-07 | 2003-10-24 | Jfe Steel Kk | Heat treatment method for steel material and program therefor |
| JP2005068553A (en) * | 2003-08-06 | 2005-03-17 | Jfe Steel Kk | Heat treatment apparatus and method for producing steel |
| JPWO2017037922A1 (en) * | 2015-09-03 | 2018-03-15 | 東芝三菱電機産業システム株式会社 | Steel hot rolling plant control system |
| JP2020011244A (en) * | 2018-07-13 | 2020-01-23 | 富士電機株式会社 | Heating device |
-
1999
- 1999-01-14 JP JP00729699A patent/JP3767663B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003301223A (en) * | 2002-02-07 | 2003-10-24 | Jfe Steel Kk | Heat treatment method for steel material and program therefor |
| JP4631247B2 (en) * | 2002-02-07 | 2011-02-16 | Ｊｆｅスチール株式会社 | Steel material heat treatment method and program thereof |
| JP2005068553A (en) * | 2003-08-06 | 2005-03-17 | Jfe Steel Kk | Heat treatment apparatus and method for producing steel |
| JPWO2017037922A1 (en) * | 2015-09-03 | 2018-03-15 | 東芝三菱電機産業システム株式会社 | Steel hot rolling plant control system |
| CN108602101A (en) * | 2015-09-03 | 2018-09-28 | 东芝三菱电机产业***株式会社 | The control system of steel hot rolling complete set of equipments |
| JP2020011244A (en) * | 2018-07-13 | 2020-01-23 | 富士電機株式会社 | Heating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3767663B2 (en) | 2006-04-19 |
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