JPH031478A - Power supply for heating with inverter - Google Patents
Power supply for heating with inverterInfo
- Publication number
- JPH031478A JPH031478A JP13502089A JP13502089A JPH031478A JP H031478 A JPH031478 A JP H031478A JP 13502089 A JP13502089 A JP 13502089A JP 13502089 A JP13502089 A JP 13502089A JP H031478 A JPH031478 A JP H031478A
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- voltage
- current
- output
- heating
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 41
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims abstract description 3
- 230000005674 electromagnetic induction Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 6
- 230000006698 induction Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- General Induction Heating (AREA)
- Protection Of Static Devices (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は鋼管等の局部焼鈍に用いられる高周波誘導加熱
装置の電源装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device for a high frequency induction heating device used for local annealing of steel pipes and the like.
［従来の技術］
従来鋼管の溶接後に行う局部焼鈍は、可燃ガスを用いる
方法、電力による抵抗発熱体（ヒーター）を用いる方法
、あるいは商用周波数を用いた誘導加熱方法等がある。[Prior Art] Conventionally, local annealing performed after welding of steel pipes includes a method using a combustible gas, a method using an electric resistance heating element (heater), and an induction heating method using a commercial frequency.
［発明が解決しようとする課題］
可燃ガスを用いるものは、ガス供給設備が必要になり、
又、温度制御が正確にできない。[Problems to be solved by the invention] Those that use flammable gas require gas supply equipment;
Also, temperature control cannot be performed accurately.
一方、抵抗発熱体（ヒーター）を用いたものは、温度制
御は精密に行なえるが、ふく射による加熱であり、効率
が悪い。さらに、抵抗発熱体（ヒーター）を焼鈍部に装
着するのに多大の工数を要する。On the other hand, those using a resistance heating element (heater) can precisely control the temperature, but heating is performed by radiation, which is inefficient. Furthermore, a large number of man-hours are required to attach the resistance heating element (heater) to the annealing section.
商用周波数の誘導加熱では温度制御、効率も良好である
が、電源の形状が大きく重量も重い。−例として一般に
多く用いられているものは約１トンの重量があり、可搬
式としては使い難い。又、加熱部に巻回する加熱コイル
の線径も太く、巻回数も多い。したがって、加熱コイル
を加熱部へ装着巻回する労力は非常に大きい。Commercial frequency induction heating has good temperature control and efficiency, but the power source is large and heavy. -For example, a commonly used device weighs about 1 ton, making it difficult to use as a portable device. Furthermore, the wire diameter of the heating coil wound around the heating section is large and the number of turns is large. Therefore, the effort required to attach and wind the heating coil to the heating section is very large.
本発明は上記の点に鑑みてなされたもので、加熱コイル
の装着が容易であると共に、システム全体を小型軽量に
構成でき、かつ、どのような負荷状況になっても電源の
破損を確実に防止し得るインバータ方式加熱用電源装置
を提供することを目的とする。The present invention has been made in view of the above points, and it is possible to easily attach a heating coil, make the entire system small and lightweight, and ensure that the power supply will not be damaged under any load conditions. An object of the present invention is to provide an inverter-type heating power supply device that can prevent the above problems.
［課題を解決するための手段］
本発明はこのような不都合を解消するために、高周波の
誘導加熱法を適用したもので、商用周波数を半導体イン
バータ回路で１〜３５ＫＨｚの高周波にし、トランスを
介して負荷に供給する。また、負荷は被加熱物の形状、
材質によって一定しておラス、加熱コイルのインピーダ
ンス不整合の場合、電源を保護するため、過電流及び過
電圧を検知し、そのどちらかでも超過した場合に電源の
出力を停止するように構成したことを特徴とする。[Means for Solving the Problems] In order to solve these problems, the present invention applies a high-frequency induction heating method. supply to the load. In addition, the load is determined by the shape of the object to be heated,
In order to protect the power supply in the case of impedance mismatch of the heating coil, which is constant depending on the material, overcurrent and overvoltage are detected, and the power supply output is stopped if either of them is exceeded. It is characterized by
［実施例］ 本発明の一実施例について、第１図を用いて説明する。[Example] An embodiment of the present invention will be described using FIG. 1.
同図において１は整流器であり、３相全波の回路例を示
している。２ａ、２ｂはインバータ回路２内の主トラン
ジスタである、３は高周波トランスであり、コンデンサ
４と共に負荷との整合を行う。５は加熱コイルで、鋼管
等の被加熱物６に巻回されている。７は電圧計であり、
加熱コイル５の両端に印加される高周波電圧を測定する
。８は電圧検出用トランスであり、必要な電圧に下げる
目的と、出力側と制御側とに分離する役割りを持ってい
る。９は電圧検出用トランジューサ、１０は電圧用コン
パレータ、１１は過電圧値設定用調節器である。１２は
出力電流検出用Ｃ１Ｔであり、１３は電流用トランジュ
ーサ、１４は出力電流計である。１５は電流用コンパレ
ータ、１６は過電流値設定用調節器である。１７はイン
バータ駆動制御器、１８は出力調整器である。In the figure, 1 is a rectifier, and shows an example of a three-phase full-wave circuit. 2a and 2b are main transistors in the inverter circuit 2, and 3 is a high frequency transformer, which, together with a capacitor 4, performs matching with the load. A heating coil 5 is wound around an object to be heated 6 such as a steel pipe. 7 is a voltmeter;
The high frequency voltage applied to both ends of the heating coil 5 is measured. 8 is a voltage detection transformer, which has the purpose of lowering the voltage to a required level and the role of separating the output side and the control side. 9 is a voltage detection transducer, 10 is a voltage comparator, and 11 is an overvoltage value setting regulator. 12 is an output current detection C1T, 13 is a current transducer, and 14 is an output ammeter. 15 is a current comparator, and 16 is an overcurrent value setting regulator. 17 is an inverter drive controller, and 18 is an output regulator.
次に上記実施例の動作を説明する。Next, the operation of the above embodiment will be explained.
図示しない電源スィッチを閉じ、整流器１に商用周波数
の３相交流電力を供給すると、インバータ回路２内の主
トランジスタ２ａ、２ｂに直流が印加される。トランジ
スタ２ａ、２ｂは、インバータ駆動制御器１７により駆
動制御され、高周波トランス３の１次側に１〜３５ＫＨ
ｚの高周波を出力する。この高周波トランス３に入力さ
れた高周波電力は、負荷と整合するよう変圧された後、
コンデンサ４を介して加熱コイル５に供給される。When a power switch (not shown) is closed and commercial frequency three-phase AC power is supplied to the rectifier 1, DC is applied to the main transistors 2a and 2b in the inverter circuit 2. The transistors 2a and 2b are driven and controlled by an inverter drive controller 17, and are connected to the primary side of the high frequency transformer 3 from 1 to 35KH.
Outputs high frequency of z. The high frequency power input to the high frequency transformer 3 is transformed to match the load, and then
It is supplied to the heating coil 5 via the capacitor 4.
このとき、加熱コイル５の両端に印加されている電圧は
、電圧計７で確認できる。また、加熱コイル５の両端に
印加されている電圧は電圧トランス８に入力され、この
電圧トランス８により出力側と絶縁、分離された高周波
波出力電圧信号はトランジューサ９に入力されて直流電
圧に変換され、過電圧設定用調節器１１で設定された電
圧値と、コンパレータ１０で比較される。At this time, the voltage applied to both ends of the heating coil 5 can be confirmed with a voltmeter 7. Further, the voltage applied to both ends of the heating coil 5 is input to a voltage transformer 8, and the high frequency output voltage signal, which is insulated and separated from the output side by this voltage transformer 8, is input to a transducer 9 and converted into a DC voltage. The voltage value is converted and compared with the voltage value set by the overvoltage setting regulator 11 by the comparator 10.
一方、高周波トランス３の２次側から取出される高周波
出力電流値は、Ｃ，Ｔ１２で検出されて電流用トランジ
ューサ１３に入力される。この出力電流値は、電流計１
４で確認できる。上記トランジューサ１３により変換さ
れた高周波電流信号は、電流用コンパレータ１５に入力
され、渦電流設定用調節器１６よりの出力と比較される
。On the other hand, the high frequency output current value taken out from the secondary side of the high frequency transformer 3 is detected by C and T12 and input to the current transducer 13. This output current value is
You can check it in 4. The high frequency current signal converted by the transducer 13 is input to the current comparator 15 and compared with the output from the eddy current setting regulator 16.
この時、高周波出力の電圧、電流値が、規定の範囲内で
あれば、被加熱物６は加熱コイル５の電磁誘導によって
所望の条件で加熱される。At this time, if the voltage and current values of the high frequency output are within the specified range, the object to be heated 6 is heated under desired conditions by the electromagnetic induction of the heating coil 5.
溶接後に行う焼鈍において、被加熱物６はその形状及び
材質が異なっており、加熱コイル５の巻回数及び巻回方
法は変化する。したがって、加熱前に加熱コイル５の巻
回条件を推定して装着するが、前述したように被加熱物
は多様であり正確に予想できない。In annealing performed after welding, the objects to be heated 6 have different shapes and materials, and the number of turns and winding method of the heating coil 5 change. Therefore, the winding conditions of the heating coil 5 are estimated and installed before heating, but as described above, the objects to be heated are diverse and cannot be predicted accurately.
加熱通電後に、整合不適の場合、過大電流あるいは過大
電圧のため、電源を破壊する恐れがある。If there is improper matching after heating and energizing, the power supply may be destroyed due to excessive current or voltage.
そこで、過大電圧、過大電流のどちらか一方でも超過し
た場合、例えば電圧では、過電圧設定用調節器１１で設
定された電圧値とコンパレータ１０に入った電圧測定信
号と比較され、超過の場合インバータ駆動制御器１７の
出力を停止させる。Therefore, if either the overvoltage or the overcurrent is exceeded, for example, in the case of voltage, the voltage value set by the overvoltage setting regulator 11 is compared with the voltage measurement signal input to the comparator 10, and if the voltage is exceeded, the inverter is driven. The output of the controller 17 is stopped.
方、電流の場合も同じく、Ｃ，Ｔ１２で検出された出力
電流値はトランジューサを介し、過電流設定用調節器１
６で設定された電流値とコンパレータ１５に入った電流
測定と比較され、超過の場合インバータ駆動制御器１７
の出力を停止させる。Similarly, in the case of current, the output current value detected by C and T12 is sent to the overcurrent setting regulator 1 via the transducer.
The current value set in step 6 is compared with the current measurement input to the comparator 15, and if it exceeds the current value, the inverter drive controller 17
Stops output.
なお、第１図には本発明に関する回路のみを記載してお
り、インバータ回路一般の保護回路等例えばサージ電圧
対策回路等は省略しである。It should be noted that FIG. 1 shows only the circuits related to the present invention, and omits general protection circuits for inverter circuits, such as surge voltage countermeasure circuits.
［発明の効果］ 上記本発明によれば、次のような効果が得られる。[Effect of the invention] According to the present invention, the following effects can be obtained.
（１） 商用周波数を半導体インバータで高周波に変
換し、高周波トランスとコンデンサを介して負荷加熱コ
イルに直接接続しであるため、イ）高周波誘導により加
熱され、高い効率が得られる。(1) Since the commercial frequency is converted to high frequency by a semiconductor inverter and directly connected to the load heating coil via a high frequency transformer and capacitor, (a) heating is achieved by high frequency induction, resulting in high efficiency.
口）高周波誘導加熱であり、加熱コイルの巻数が少く、
線径が小さい。したがって、加熱コイルの装着が非常に
簡便になった。Mouth) High-frequency induction heating, the number of turns of the heating coil is small,
The wire diameter is small. Therefore, attachment of the heating coil has become very easy.
ハ） 高周波トランスを介しているため、負荷側は電源
と分離している。c) The load side is separated from the power supply because it goes through a high-frequency transformer.
（２） また、高周波出力側に過電圧及び過電流検出
器を備えたため、
イ）どのような負荷状況になっても電源の破損を未然に
防止できる。(2) In addition, an overvoltage and overcurrent detector is installed on the high-frequency output side, so a) damage to the power supply can be prevented no matter what the load situation is.
口）電圧が過大か、電流が過大かによって、加熱コイル
の整合が判別できる。つまり、加熱コイル巻数の多いか
、少いかを判別でき巻数の是正が容易である。Mouth) Matching of the heating coil can be determined by whether the voltage or current is excessive. In other words, it is possible to determine whether the number of turns of the heating coil is large or small, and it is easy to correct the number of turns.
（３） 更に加熱装置は高周波を利用したため、イ）
高周波電源及びシステム全体が小型軽量にでき、特に現
地等に用いる可搬形とするのに最適である。(3) Furthermore, since the heating device used high frequency, a)
The high-frequency power supply and the entire system can be made small and lightweight, making it particularly suitable for portable use on-site.
である。It is.
１・・・整流器、２・・・インバータ回路、２ａ、２ｂ
・・・主トランジスタ、３・・・高周波トランス、４・
・・コンデンサ、５・・・加熱コイル、６・・・被加熱
物、７・・・電圧計、８・・・電圧検出用トランス、９
・・・電圧検出用トランジューサ、１０・・・電圧用コ
ンパレータ、１１・・・過電圧値設定用調節器、１２・
・・出力電流検出用Ｃ，Ｔ、１３・・・電流用トランジ
ューサ、１４・・・出力電流計、１５・・・電流用コン
パレータ、１６・・・過電流値設定用調節器、１７・・
・インバータ駆動制御器、１８・・・出力調整器。1... Rectifier, 2... Inverter circuit, 2a, 2b
...Main transistor, 3...High frequency transformer, 4.
... Capacitor, 5 ... Heating coil, 6 ... Heated object, 7 ... Voltmeter, 8 ... Voltage detection transformer, 9
...Transducer for voltage detection, 10...Comparator for voltage, 11...Adjuster for setting overvoltage value, 12.
... Output current detection C, T, 13... Current transducer, 14... Output ammeter, 15... Current comparator, 16... Overcurrent value setting regulator, 17...
- Inverter drive controller, 18...output regulator.
Claims (1)
インバータ回路と、このインバータ回路を制御する制御
手段と、上記インバータの過大電流及び過大電圧を検知
し、上記制御手段を介して上記インバータ回路の動作を
停止させる回路保護手段と、上記インバータ回路から出
力される高周波電力を負荷と整合させる高周波トランス
と、この高周波トランスの出力側と加熱コイルとの間に
連結されるコンデンサとを具備したことを特徴とするイ
ンバータ方式加熱用電源装置。A semiconductor inverter circuit that converts a commercial frequency to a high frequency of 1 to 35 KHz, a control means that controls this inverter circuit, detects excessive current and excessive voltage of the inverter, and controls the operation of the inverter circuit via the control means. The heating coil is characterized by comprising a circuit protection means for stopping the inverter circuit, a high frequency transformer for matching the high frequency power output from the inverter circuit with the load, and a capacitor connected between the output side of the high frequency transformer and the heating coil. Inverter type heating power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1135020A JP2851304B2 (en) | 1989-05-29 | 1989-05-29 | Inverter type heating power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1135020A JP2851304B2 (en) | 1989-05-29 | 1989-05-29 | Inverter type heating power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH031478A true JPH031478A (en) | 1991-01-08 |
| JP2851304B2 JP2851304B2 (en) | 1999-01-27 |
Family
ID=15142056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1135020A Expired - Lifetime JP2851304B2 (en) | 1989-05-29 | 1989-05-29 | Inverter type heating power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2851304B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203811A (en) * | 1990-06-21 | 1993-04-20 | Mazda Motor Corporation | Method of positioning a door in an automobile body structure |
| JP2006038436A (en) * | 2004-07-22 | 2006-02-09 | Nabio Kk | Miniature metal melting furnace |
| WO2009060764A1 (en) | 2007-11-05 | 2009-05-14 | Nippon Steel Corporation | Apparatus for heating the welded portion of steel pipe material, and method for the apparatus |
| CN109587831A (en) * | 2017-09-29 | 2019-04-05 | 北京北方华创微电子装备有限公司 | Heating system and go to gas chamber |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5671732B2 (en) * | 2009-12-24 | 2015-02-18 | 高周波熱錬株式会社 | Induction heating device |
| CN105025609B (en) * | 2015-07-13 | 2017-04-26 | 苏州经贸职业技术学院 | Electromagnetic heating controller circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562382U (en) * | 1979-06-16 | 1981-01-10 | ||
| JPS5736836A (en) * | 1980-08-15 | 1982-02-27 | Hitachi Ltd | Pellet bonder |
| JPS58171610A (en) * | 1982-03-31 | 1983-10-08 | Matsushita Electric Ind Co Ltd | Optical measuring device of object size |
-
1989
- 1989-05-29 JP JP1135020A patent/JP2851304B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562382U (en) * | 1979-06-16 | 1981-01-10 | ||
| JPS5736836A (en) * | 1980-08-15 | 1982-02-27 | Hitachi Ltd | Pellet bonder |
| JPS58171610A (en) * | 1982-03-31 | 1983-10-08 | Matsushita Electric Ind Co Ltd | Optical measuring device of object size |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203811A (en) * | 1990-06-21 | 1993-04-20 | Mazda Motor Corporation | Method of positioning a door in an automobile body structure |
| JP2006038436A (en) * | 2004-07-22 | 2006-02-09 | Nabio Kk | Miniature metal melting furnace |
| JP4511283B2 (en) * | 2004-07-22 | 2010-07-28 | ナビオ株式会社 | Metal melting crucible |
| WO2009060764A1 (en) | 2007-11-05 | 2009-05-14 | Nippon Steel Corporation | Apparatus for heating the welded portion of steel pipe material, and method for the apparatus |
| US8383978B2 (en) | 2007-11-05 | 2013-02-26 | Nippon Steel Corporation | Steel pipe material weld zone heating apparatus and method |
| CN109587831A (en) * | 2017-09-29 | 2019-04-05 | 北京北方华创微电子装备有限公司 | Heating system and go to gas chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2851304B2 (en) | 1999-01-27 |
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