JPH05234669A - High frequency induction heating device - Google Patents
High frequency induction heating deviceInfo
- Publication number
- JPH05234669A JPH05234669A JP3511992A JP3511992A JPH05234669A JP H05234669 A JPH05234669 A JP H05234669A JP 3511992 A JP3511992 A JP 3511992A JP 3511992 A JP3511992 A JP 3511992A JP H05234669 A JPH05234669 A JP H05234669A
- Authority
- JP
- Japan
- Prior art keywords
- heated
- high frequency
- coil
- current
- 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.)
- Withdrawn
Links
Landscapes
- General Induction Heating (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一方向に連続的に搬送
される被加熱物を加熱するに最適な高周波誘導加熱装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency induction heating apparatus which is optimal for heating an object to be heated which is continuously conveyed in one direction.
【０００２】[0002]
【従来の技術】図１は、線状，棒状，管状の長尺ものを
連続加熱する場合の従来の高周波誘導加熱装置を示して
おり、１は連続的に搬送される被加熱物である。被加熱
物１は、送りローラー２により図中右から左方向に連続
的に搬送されている。この送りローラー２は、通常焼入
鋼や表面硬化が施された金属で形成されており、軸受け
を介して接地されている。被加熱物１には、誘導加熱コ
イル３が巻き回されており、加熱コイル３の両端は高周
波電源４に接続されている。2. Description of the Related Art FIG. 1 shows a conventional high-frequency induction heating apparatus for continuously heating a long linear, rod-shaped, or tubular material, and 1 is a continuously conveyed object to be heated. The article to be heated 1 is continuously conveyed by the feed roller 2 from right to left in the figure. The feed roller 2 is usually made of hardened steel or surface-hardened metal, and is grounded via a bearing. An induction heating coil 3 is wound around the object to be heated 1, and both ends of the heating coil 3 are connected to a high frequency power source 4.
【０００３】このような構成において、加熱コイル３に
高周波電流を通電すると、磁束が発生し、この磁束内に
鎖交する導電性の被加熱物１に誘導電流が誘起される。
この誘導電流により被加熱物は発熱し、所定の温度にま
で加熱される。In such a structure, when a high-frequency current is passed through the heating coil 3, a magnetic flux is generated, and an induced current is induced in the conductive object 1 to be heated, which is linked to the magnetic flux.
The object to be heated generates heat by this induced current and is heated to a predetermined temperature.
【０００４】[0004]
【発明が解決しようとする課題】上記した構成で、誘導
電流の一部、すなわち、誘起される誘導電流の軸方向成
分Ｉが被加熱物１に流れる。この電流がローラー２と被
加熱物１との接触状態によりアーク放電によるスパーク
を発生し、被加熱物に傷をつけて被加熱物の製品として
の価値を低下させ、また、ローラー２の寿命を短くして
いた。With the above-described structure, a part of the induced current, that is, the axial component I of the induced current flows through the object to be heated 1. This current causes sparks due to arc discharge due to the contact state between the roller 2 and the article to be heated 1, which damages the article to be heated and reduces the value of the article to be heated as a product. It was shortened.
【０００５】この点を改善するため、特開昭４８−５５
４３３号に記載された先願の方式では、２ケ以上の誘導
加熱コイルを被加熱物の長手方向に並べて配置し、被加
熱物の軸方向の誘起電流を互いに打ち消すような電流を
誘導するように、誘導加熱コイルにコイル電流を流すよ
うにしている。しかしながら、先願の方式では、加熱コ
イルを被加熱物の長手方向に並べて配置しているので、
装置が大型化するという欠点を有している。In order to improve this point, JP-A-48-55
In the method of the prior application described in Japanese Patent No. 433, two or more induction heating coils are arranged side by side in the longitudinal direction of the object to be heated so as to induce currents that cancel out the induced currents in the axial direction of the object to be heated. In addition, a coil current is passed through the induction heating coil. However, in the method of the prior application, since the heating coils are arranged side by side in the longitudinal direction of the object to be heated,
It has the drawback of increasing the size of the device.
【０００６】本発明は、このような点に鑑みてなされた
もので、その目的は、コンパクトな構成で、被加熱物と
ローラーとの間のスパークを著しく少なくし、被加熱物
に傷が着くことを防止すると共にローラーの寿命を長く
し得る高周波誘導加熱装置を実現するにある。The present invention has been made in view of the above points, and an object thereof is a compact structure, in which sparks between an object to be heated and a roller are remarkably reduced, and the object to be heated is scratched. This is to realize a high-frequency induction heating device that can prevent this and extend the life of the roller.
【０００７】[0007]
【課題を解決するための手段】本発明に基づく高周波誘
導加熱装置は、一方向に搬送される被加熱物を支持し、
電気的に接地された支持部材と、支持部材の間に設けら
れ、被加熱物の回りに巻き回された誘導加熱コイルと、
誘導加熱コイルに高周波を供給するための高周波電源と
を備えており、該誘導加熱コイルは、主加熱コイルと、
主加熱コイルに沿って配置された給電線とより成り、主
加熱コイルへの高周波電流の通電により、被加熱物に誘
起される誘導電流の被加熱物の軸方向の成分と、給電線
への高周波電流の通電により、被加熱物に誘起される誘
導電流の被加熱物の軸方向の成分とが、互いに逆向きと
なるように、主加熱コイルと給電線とは構成されている
ことを特徴としている。A high frequency induction heating apparatus according to the present invention supports an object to be heated which is conveyed in one direction,
An electrically grounded support member, and an induction heating coil provided between the support members and wound around the object to be heated,
A high frequency power supply for supplying a high frequency to the induction heating coil, the induction heating coil, a main heating coil,
It consists of a power supply line arranged along the main heating coil, and the high-frequency current is passed through the main heating coil. The main heating coil and the power supply line are configured such that the axial component of the induction current induced in the object to be heated by the high-frequency current is opposite to each other. I am trying.
【０００８】[0008]
【作用】主加熱コイルへの高周波電流の通電により、被
加熱物に誘起される誘導電流の被加熱物の軸方向の成分
と、主加熱コイルに沿って配置された線状あるいはコイ
ル状の給電線への高周波電流の通電により、被加熱物に
誘起される誘導電流の被加熱物の軸方向の成分とが、互
いに逆向きとなるようにした。The function of the induction current induced in the object to be heated by the high-frequency current flowing through the main heating coil in the axial direction of the object to be heated and the linear or coil-like supply arranged along the main heating coil. By applying a high-frequency current to the electric wire, the axial component of the induction current induced in the object to be heated is opposite to that in the axial direction.
【０００９】[0009]
【実施例】以下、図面を参照して本発明の実施例を詳細
に説明する。図２は本発明の一実施例を示しており、図
１の従来装置と同一ないしは類似構成要素は同一番号を
付してその説明を省略する。この実施例で誘導加熱コイ
ル５は、内側コイル６と外側コイル７とより成り、内側
コイル６と外側コイル７とはその端部同志が電気的に接
続されている。高周波電源４は、外側コイル７の分割さ
れた中心部分で外側コイル７に接続されている。なお、
内側コイル６と外側コイル７との接続は、実際には、そ
れぞれを別個に構成し、組み立てやすいようにそれぞれ
に端子を設け、それぞれの端子同志をボルトで締め付け
るようにしている。このような構成の動作を以下説明す
る。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 shows an embodiment of the present invention, in which the same or similar components as those of the conventional device of FIG. 1 are designated by the same reference numerals and the description thereof is omitted. In this embodiment, the induction heating coil 5 is composed of an inner coil 6 and an outer coil 7, and the ends of the inner coil 6 and the outer coil 7 are electrically connected to each other. The high frequency power supply 4 is connected to the outer coil 7 at the divided central portion of the outer coil 7. In addition,
The inner coil 6 and the outer coil 7 are actually connected to each other separately, each of which is provided with a terminal for facilitating assembly, and each terminal is fastened with a bolt. The operation of such a configuration will be described below.
【００１０】高周波電源４から外側コイル７を介して内
側コイル６に高周波電流を流せば、磁束が発生し、この
磁束内に鎖交する導電性の被加熱物１に誘導電流が誘起
される。この誘導電流により被加熱物１は発熱し、所定
の温度にまで加熱される。この内側コイル６に高周波電
流を通電することに伴って、被加熱物１に発生する誘導
電流の一部、すなわち、誘起される誘導電流の軸方向成
分Ｉ１が被加熱物１に流れる。また、外側コイル７に高
周波電流を通電することに伴って、被加熱物１に発生す
る誘導電流の一部、すなわち、誘起される誘導電流の軸
方向成分Ｉ２が被加熱物１に流れる。この２種の誘導電
流Ｉ１，Ｉ２は、逆向きに発生するように、外側コイル
７と内側コイル６の接続は考慮されており、従って、こ
の２種の誘導電流Ｉ１とＩ２とは互いに打ち消し合い、
その結果、被加熱物１の軸方向に流れる誘導電流の成分
は著しく減少することになる。そのため、被加熱物１と
ローラー２との間でのスパークの発生は激減し、被加熱
物１を傷付けたり、ローラー２の寿命を短くするような
ことは防止される。なお、２種の加熱コイルによって発
生する磁束の向きに関しては、被加熱物１への誘導加熱
が本来の目的であるので、内側コイル６による磁束の向
きと、外側コイル７による磁束の向きとが等しくなるよ
うに、両コイルの接続は考慮されている。When a high-frequency current is passed from the high-frequency power source 4 to the inner coil 6 via the outer coil 7, a magnetic flux is generated, and an induced current is induced in the electrically conductive object 1 to be heated, which is linked to the magnetic flux. The object to be heated 1 generates heat by this induced current and is heated to a predetermined temperature. When a high-frequency current is passed through the inner coil 6, a part of the induced current generated in the object 1 to be heated, that is, the axial component I 1 of the induced current flows in the object 1 to be heated. In addition, a part of the induced current generated in the object to be heated 1, that is, the axial component I 2 of the induced current that flows in the object to be heated 1 due to the high-frequency current flowing through the outer coil 7 flows into the object to be heated 1. Induced current I 1 of the two, I 2, as occurs in the opposite direction, the connection of the outer coil 7 and the inner coil 6 is considered, therefore, the induced current I 1 and I 2 of the two Cancel each other out,
As a result, the component of the induced current flowing in the object 1 to be heated in the axial direction is significantly reduced. Therefore, the occurrence of sparks between the article to be heated 1 and the roller 2 is drastically reduced, and it is possible to prevent the article to be heated 1 from being scratched or shorten the life of the roller 2. Regarding the direction of the magnetic flux generated by the two kinds of heating coils, since the original purpose is induction heating to the object to be heated 1, the direction of the magnetic flux by the inner coil 6 and the direction of the magnetic flux by the outer coil 7 are different. The connections of both coils are considered so that they are equal.
【００１１】ここで、モデル化した装置で行った実験結
果について述べる。図３は先願の方式によるものであ
り、被加熱物１０に対して１５ターンの第１の加熱コイ
ル１１と同じく１５ターンの第２の加熱コイル１２とを
被加熱物１０の軸方向に並べて配置し、高周波電源１３
からそれぞれの加熱コイルに高周波を通電した。この
時、加熱コイルに流れる電流ｉと、被加熱物１０の軸方
向に流れる電流Ｉとを測定し、Ｉ／ｉを求めた。図４，
図５は本発明に基づくものであり、図４は、２５ターン
の内側コイル１４の中心付近にのみ、５ターンの外側コ
イル１５を配置したケース、図５は、２９ターンの内側
コイル１６に対して、１ターンの外側コイル１７を内側
コイル１６の全巻き長さに渡って巻き戻したケースを示
している。それぞれについてＩ／ｉを求めたが、図４の
ケースでは、図３の従来方式に比べて被加熱物１０に流
れる軸方向の電流は若干減少した。図５のケースでは、
図３のケースに比べ、１０倍以上も軸方向電流は減少し
た。このことから、加熱コイルを多層状に配置すること
によって装置のコンパクト化は図れるものの、内側コイ
ルの全長さに渡って、外側コイルを巻き戻すことが、被
加熱物の軸方向電流を減少させる上でより望ましいこと
が明らかとなった。なお、外側コイルの巻き数は、被加
熱物の軸方向電流を減少させる上で、さほど寄与しない
ことも併せて判明した。Here, the results of experiments conducted with the modeled device will be described. FIG. 3 is based on the method of the prior application, in which the first heating coil 11 having 15 turns and the second heating coil 12 having 15 turns are arranged side by side in the axial direction of the object to be heated 10. Place the high frequency power supply 13
High frequency was applied to each heating coil. At this time, the current i flowing in the heating coil and the current I flowing in the axial direction of the object to be heated 10 were measured to obtain I / i. Figure 4,
FIG. 5 is based on the present invention. FIG. 4 is a case in which the outer coil 15 of 5 turns is arranged only near the center of the inner coil 14 of 25 turns, and FIG. A case is shown in which the outer coil 17 of one turn is unwound over the entire winding length of the inner coil 16. I / i was obtained for each of them, but in the case of FIG. 4, the axial current flowing through the object to be heated 10 was slightly reduced as compared with the conventional method of FIG. In the case of FIG. 5,
Compared to the case of FIG. 3, the axial current decreased more than 10 times. For this reason, although the apparatus can be made compact by arranging the heating coils in multiple layers, rewinding the outer coil over the entire length of the inner coil reduces the axial current of the object to be heated. It became clear that it was more desirable. It was also found that the number of turns of the outer coil does not contribute so much in reducing the axial current of the object to be heated.
【００１２】図６は本発明の他の実施例を示している。
この実施例と図２の実施例との相違点は、加熱コイル５
が内側コイル６と、被加熱物１の長手方向に配置された
給電線８とによって構成されている点である。この給電
線８は、実際には被加熱物１と平行ではなく、僅かに内
側コイル６の回りをターンするように配置されている。
この実施例で、給電線８への高周波電流の通電に基づい
て被加熱物１に誘導電流が流れるが、この誘導電流の被
加熱物１の軸方向成分の向きと、内側コイル６への高周
波電流の通過電流によって発生した誘導電流の軸方向成
分とは逆向きとなるように、内側コイル６と給電線８と
の電気的接続が考慮されている。このような内側コイル
６と完全なコイル状とはなっていない給電線８の組み合
わせによっても被加熱物１に流れる軸方向の電流成分は
著しく減少することが確認された。なお、給電線８は、
被加熱物１にできる限り接近させることが望ましい。FIG. 6 shows another embodiment of the present invention.
The difference between this embodiment and the embodiment of FIG. 2 is that the heating coil 5
Is composed of the inner coil 6 and the power supply line 8 arranged in the longitudinal direction of the object to be heated 1. The power supply line 8 is not actually parallel to the object to be heated 1 but is arranged so as to slightly turn around the inner coil 6.
In this embodiment, an induction current flows through the object to be heated 1 based on the energization of the high frequency current to the feeder line 8. The direction of the axial component of the object to be heated 1 of this induction current and the high frequency to the inner coil 6 The electrical connection between the inner coil 6 and the power supply line 8 is considered so as to be opposite to the axial component of the induced current generated by the passing current. It was confirmed that the axial current component flowing through the object to be heated 1 is significantly reduced even by the combination of the inner coil 6 and the power supply line 8 which is not completely coiled. The power supply line 8 is
It is desirable to bring the object to be heated 1 as close as possible.
【００１３】以上本発明の実施例を説明したが、本発明
はこの実施例に限定されない。例えば、外側コイル巻方
は、各実施例に限定されるものではない。Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, the method of winding the outer coil is not limited to each embodiment.
【００１４】[0014]
【発明の効果】以上説明したように、本発明に基づく高
周波誘導加熱装置は、主加熱コイルへの高周波電流の通
電により、被加熱物に誘起される誘導電流の被加熱物の
軸方向の成分と、主加熱コイルに沿って配置された線状
あるいはコイル状の給電線への高周波電流の通電によ
り、被加熱物に誘起される誘導電流の被加熱物の軸方向
の成分とが、互いに逆向きとなるようにしたので、コン
パクトな構成で、被加熱物とローラーとの間のスパーク
を著しく少なくし、被加熱物に傷が着くことを防止する
と共にローラーの寿命を長くすることができる。As described above, in the high frequency induction heating apparatus according to the present invention, the component of the induction current induced in the object to be heated in the axial direction of the object to be heated when the high frequency current is passed through the main heating coil. And the axial component of the induction current induced in the object to be heated by the high-frequency current passing through the linear or coil-shaped power supply line arranged along the main heating coil are opposite to each other. Since it is oriented, the spark between the object to be heated and the roller can be remarkably reduced, the object to be heated can be prevented from being scratched, and the life of the roller can be extended with a compact structure.
【図１】従来の高周波誘導加熱装置を示す図である。FIG. 1 is a diagram showing a conventional high-frequency induction heating device.
【図２】本発明の一実施例である高周波誘導加熱装置を
示す図である。FIG. 2 is a diagram showing a high frequency induction heating apparatus according to an embodiment of the present invention.
【図３】モデル化した従来方式を示す図である。FIG. 3 is a diagram showing a modeled conventional method.
【図４】モデル化した本発明に基づく方式を示す図であ
る。FIG. 4 shows a modeled scheme according to the invention.
【図５】モデル化した本発明に基づく方式を示す図であ
る。FIG. 5 shows a modeled scheme according to the invention.
【図６】本発明に基づく高周波誘導加熱装置の他の実施
例を示す図である。FIG. 6 is a diagram showing another embodiment of the high-frequency induction heating device according to the present invention.
１ 被加熱物 ２ 送りローラー ３，５ 加熱コイル ４ 高周波電源 ６ 内側コイル ７ 外側コイル 1 object to be heated 2 feed roller 3, 5 heating coil 4 high frequency power supply 6 inner coil 7 outer coil
Claims (3)
電気的に接地された支持部材と、支持部材の間に設けら
れ、被加熱物の回りに巻き回された誘導加熱コイルと、
誘導加熱コイルに高周波を供給するための高周波電源と
を備えており、該誘導加熱コイルは、主加熱コイルと、
主加熱コイルに沿って配置された給電線とより成り、主
加熱コイルへの高周波電流の通電により、被加熱物に誘
起される誘導電流の被加熱物の軸方向の成分と、給電線
への高周波電流の通電により、被加熱物に誘起される誘
導電流の被加熱物の軸方向の成分とが、互いに逆向きと
なるように、主加熱コイルと給電線とは構成されている
ことを特徴とする高周波誘導加熱装置。1. A support for an object to be heated conveyed in one direction,
An electrically grounded support member, and an induction heating coil provided between the support members and wound around the object to be heated,
A high frequency power supply for supplying a high frequency to the induction heating coil, the induction heating coil, a main heating coil,
It consists of a power supply line arranged along the main heating coil, and the high-frequency current is passed through the main heating coil. The main heating coil and the power supply line are configured such that the axial component of the induction current induced in the object to be heated by the high-frequency current is opposite to each other. High frequency induction heating device.
層して巻かれた外側コイルである請求項１記載の高周波
誘導加熱装置。2. The high frequency induction heating device according to claim 1, wherein the power supply line is an outer coil that is laminated and wound on the outside of the main heating coil.
さとほぼ等しくした請求項１記載の高周波誘導加熱装
置。3. The high frequency induction heating device according to claim 1, wherein the length of the power supply line is substantially equal to the winding length of the main heating coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3511992A JPH05234669A (en) | 1992-02-21 | 1992-02-21 | High frequency induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3511992A JPH05234669A (en) | 1992-02-21 | 1992-02-21 | High frequency induction heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05234669A true JPH05234669A (en) | 1993-09-10 |
Family
ID=12433045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3511992A Withdrawn JPH05234669A (en) | 1992-02-21 | 1992-02-21 | High frequency induction heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05234669A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999041952A1 (en) * | 1998-02-13 | 1999-08-19 | Denki Kogyo Co., Ltd. | Induction heating coil and induction heating device using the induction heating coil |
-
1992
- 1992-02-21 JP JP3511992A patent/JPH05234669A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999041952A1 (en) * | 1998-02-13 | 1999-08-19 | Denki Kogyo Co., Ltd. | Induction heating coil and induction heating device using the induction heating coil |
| US6300608B2 (en) | 1998-02-13 | 2001-10-09 | Denki Kogyo Co., Ltd. | Induction heating coil and induction heating device using the induction heating coil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4187450A (en) | High frequency ballast transformer | |
| JPH11233247A (en) | Induction heating coil and induction heating device using the induction heating coil | |
| JP2003123951A (en) | Hole inner surface heating inductor | |
| US6285015B1 (en) | Induction heater with a unit for preventing generation of sparks | |
| WO2022131131A1 (en) | Induction heating type heat treatment device for wound core and heat treatment method therefor | |
| JPH05234669A (en) | High frequency induction heating device | |
| US5804959A (en) | Shunt core transformer with a second secondary coil comprised of a ferrous material | |
| US3140378A (en) | Apparatus and method for welding strips onto a tube | |
| US20200389946A1 (en) | Inductor for electromagnetic induction heating for plasticizing cylinders | |
| US3318127A (en) | Forming apparatus | |
| KR20230002643A (en) | Isolation transformer with RF shielding structure for effective magnetic power transfer | |
| US3140458A (en) | Electrical inductive device and method of making the same | |
| JP4101967B2 (en) | Coiled bar wire heating device | |
| JPH0624983Y2 (en) | Step-up transformer for high-frequency heating device | |
| JPH06124844A (en) | Magnetism leakage transformer | |
| JP2536888B2 (en) | Magnet coil | |
| US2554648A (en) | Circuit arrangement for electric discharge lamps | |
| JPH0732065B2 (en) | Induction heating cooker | |
| JPH07226292A (en) | High frequency induction heating coil | |
| SU907878A1 (en) | Induction heating device | |
| US2277372A (en) | Apparatus for heat-treating tandem bearings | |
| US2877382A (en) | Apparatus for operating gaseous discharge devices | |
| SU739755A1 (en) | Inductor for heating portions of products and method of installation | |
| JP2002025817A (en) | Superconducting coil and superconducting magnet | |
| JPS62263618A (en) | Electromagnetic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990518 |