JP3371636B2 - Square wave inverter power supply - Google Patents
Square wave inverter power supplyInfo
- Publication number
- JP3371636B2 JP3371636B2 JP22326595A JP22326595A JP3371636B2 JP 3371636 B2 JP3371636 B2 JP 3371636B2 JP 22326595 A JP22326595 A JP 22326595A JP 22326595 A JP22326595 A JP 22326595A JP 3371636 B2 JP3371636 B2 JP 3371636B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- circuit
- arm
- rectangular wave
- 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 - Lifetime
Links
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- Inverter Devices (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、インバータ電源装
置に係り、特に電流出力波形を改良した矩形波インバー
タ電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter power supply device, and more particularly to a rectangular wave inverter power supply device having an improved current output waveform.
【０００２】[0002]
【従来の技術】電縫管溶接用電源装置として、サイリス
タあるいはＧＴＯサイリスタを使用した中周波矩形波イ
ンバータ電源を採用することがある。この場合の代表的
な電圧形インバータの基本回路図を図４に示す。2. Description of the Related Art As a power source device for welding electric resistance welded pipes, a medium frequency rectangular wave inverter power source using a thyristor or a GTO thyristor may be adopted. A basic circuit diagram of a typical voltage source inverter in this case is shown in FIG.
【０００３】図４において、１は直流電源、２ａ〜２ｄ
はスイッチング素子であるゲートターンオフサイリス
タ、３ａ〜３ｄはダイオード、４は負荷回路であるイン
ダクタンス要素であるコイル５とリアクタンスである抵
抗６である。In FIG. 4, reference numeral 1 is a DC power source, and 2a to 2d.
Are gate turn-off thyristors which are switching elements, 3a to 3d are diodes, 4 is a coil 5 which is an inductance element which is a load circuit, and a resistor 6 which is reactance.
【０００４】出力端子ＵＶ間に誘導負荷（加熱コイル：
ＲＬ直列回路）を接続した時の電圧波形及び電流波形は
図５の（Ａ），（Ｂ）の通りになる。即ち、電圧形イン
バータのため電圧波形は完全な矩形波になるが、電流波
形は矩形波とはならない。電流の立ち上がり及び立ち下
がりは負荷端子間（負荷側）の時定数（τ＝Ｌ／Ｒ：）
で決まる傾斜となる。特にこの時定数が大きい場合は、
立ち上がりと立ち下がりが鈍くダラダラとなるため、溶
接ビード形状等に影響し、溶接品質を悪くする。Inductive load (heating coil:
The voltage waveform and the current waveform when the RL series circuit) is connected are as shown in FIGS. That is, since the voltage waveform is a perfect rectangular wave because of the voltage type inverter, the current waveform is not a rectangular wave. The rise and fall of the current is the time constant between the load terminals (load side) (τ = L / R :)
The slope is determined by. Especially when this time constant is large,
Since the rising and falling are dull and rough, the shape of the weld bead is affected and the welding quality is deteriorated.
【０００５】[0005]
【発明が解決しようとする課題】溶接品質は成形、加熱
部の加圧力、溶接用電源、雰囲気等により影響を受け
る。この中の溶接用電源に着目すると、適用周波数及び
加熱部に流れる電流がどうかがポイントとなる。現在の
電圧形インバータでは出力端子から見た負荷側の時定数
（インダクタンス）の大小によって電流波形は変化す
る。例えば、図５（Ｂ）のように立ち上がり、立ち下が
りが鈍くなり、溶接部のビード形状等に影響を与える。
そのため、溶接強度を下げたり、溶接部外観等を悪く
し、溶接品質を悪くしている。The quality of welding is affected by forming, pressure applied to the heating portion, welding power source, atmosphere and the like. Focusing on the welding power source, the point is how the applied frequency and the current flowing through the heating section are. In current voltage type inverters, the current waveform changes depending on the magnitude of the time constant (inductance) on the load side as seen from the output terminal. For example, as shown in FIG. 5 (B), the rising and falling become dull, which affects the bead shape and the like of the welded portion.
Therefore, the welding strength is lowered, the appearance of the welded portion is deteriorated, and the welding quality is deteriorated.
【０００６】本発明は上述の問題点に鑑みてなされたも
ので、その目的は出力電流の立ち上がりと立ち下がりが
急峻にして高性能な矩形波インバータ電源装置を提供す
ることである。The present invention has been made in view of the above problems, and an object thereof is to provide a high-performance rectangular wave inverter power supply device in which the rising and falling of the output current are steep.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明の矩形波インバータ電源装置は、スイッチ素
子を直列に接続してなるアームをブリッジ接続して矩形
波インバータ装置を構成し、このインバータ装置にて直
流電力を交流電力に変換して誘導負荷に供給するものに
おいて、前記各アームと同様スイッチ素子を直列に接続
して構成され、前期インバータ装置を構成する各アーム
と並列接続された電圧補償回路用のアームと、前記誘導
負荷に接続され、且つ、タップが前期電圧補償回路用の
アーム橋絡点に接続されたタップ付変圧器とで電圧補償
回路を構成し、この電圧補償回路より前記インバータ装
置の出力電流立ち上がり及び立ち下がり時に電圧を補償
するよう構成したことを特徴とする。In order to achieve the above object, a rectangular wave inverter power supply device of the present invention comprises a switch element.
Rectangle by connecting arms that connect children in series with each other
Wave inverter device is configured, and this inverter device
Converting flowing power into AC power and supplying it to inductive loads
In the same way, switch elements are connected in series like each arm.
And each arm that constitutes the inverter device of the previous term
An arm for a voltage compensation circuit connected in parallel with
It is connected to the load and the tap is for the voltage compensation circuit
Voltage compensation with a transformer with a tap connected to the arm bridge point
A circuit is constructed, and the inverter device is connected from this voltage compensation circuit.
Compensates the voltage when the output current rises and falls
It is characterized in that it is configured to .
【０００８】[0008]
【０００９】[0009]
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施の形態を図１
〜図３を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
-It demonstrates, referring FIG.
【００１１】図１は本発明を適用した矩形波インバータ
電源装置を示すもので、図４のものと同一又は相当部分
には同一符号が付されている。本発明においては、図１
に示すように、電圧補償回路部１０を設ける。電圧補償
回路部１０はサイリスタやゲートターンオフサイリスタ
等のスイッチ素子１１ａ，１１ｂ、ダイオード１２ａ，
１２ｂおよび変圧器１３によって構成されている。FIG. 1 shows a rectangular wave inverter power supply device to which the present invention is applied. The same or corresponding parts as those in FIG. 4 are designated by the same reference numerals. In the present invention, FIG.
As shown in, the voltage compensation circuit unit 10 is provided. The voltage compensation circuit unit 10 includes switch elements 11a and 11b such as thyristors and gate turn-off thyristors, diodes 12a,
12b and the transformer 13.
【００１２】サイリスタやゲートターンオフサイリスタ
等のスイッチ素子２ａと２ｂからなる第１の直列回路と
サイリスタやゲートターンオフサイリスタ等のスイッチ
素子２ｃと２ｄからなる第２の直列回路によって第１の
ブリッジ回路を形成する。A first bridge circuit is formed by a first series circuit composed of switch elements 2a and 2b such as thyristors and gate turn-off thyristors and a second series circuit composed of switch elements 2c and 2d such as thyristors and gate turn-off thyristors. To do.
【００１３】スイッチ素子１１ａと１１ｂからなる第３
の直列回路と第１の直列回路によって第２のブリッジ回
路を形成する。第２の直列回路と第３の直列回路によっ
て第３のブリッジ回路を形成する。Third switch element 11a and 11b
A second bridge circuit is formed by the series circuit of and the first series circuit. A third bridge circuit is formed by the second series circuit and the third series circuit.
【００１４】第１のブリッジ回路には負荷回路４が接続
され、この負荷回路４には変圧器１３が並列に接続され
ている。第２のブリッジ回路には負荷回路４の入力端子
Ｕ１と変圧器１３のタップ端子Ｕ２が接続されている。
第３のブリッジ回路には負荷回路４の入力端子Ｖ１とタ
ップ端子Ｕ２が接続されている。A load circuit 4 is connected to the first bridge circuit, and a transformer 13 is connected in parallel to the load circuit 4. The input terminal U1 of the load circuit 4 and the tap terminal U2 of the transformer 13 are connected to the second bridge circuit.
The input terminal V1 and the tap terminal U2 of the load circuit 4 are connected to the third bridge circuit.
【００１５】図１の矩形波インバータ電源装置におい
て、インバータ出力電圧の立ち上がり初期に、基本イン
バータ電圧（Ｅ１）に電圧（Ｅ２）を重畳することによ
り、電流の立ち上がり及び立ち下がりを急峻にして、電
流波形を矩形波に近づけるようにする。In the rectangular wave inverter power supply device of FIG. 1, by superimposing the voltage (E2) on the basic inverter voltage (E1) at the initial stage of rising of the inverter output voltage, the rising and falling of the current is made steep and the current so that Keru closer to a square wave waveform.
【００１６】第１のブリッジ回路（スイッチ素子２ａ〜
２ｄ）ではスイッチ素子２ａと２ｄ、２ｂと２ｃを順次
交互にオン，オフし、第２のブリッジ回路（スイッチ素
子２ａ，２ｂ，１１ａ，１１ｂ）ではスイッチ素子２ａ
と１１ｂ、２ｂと１１ａを順次交互にオン，オフさせ
る。第３のブリッジ回路（スイッチ素子２ｃ，２ｄ，１
１ａ，１１ｂ）ではスイッチ素子２ｃと１１ｂ、２ｄと
１１ａを交互にオン，オフさせる。The first bridge circuit (switch elements 2a ...
2d) switch elements 2a and 2d, 2b and 2c are alternately turned on and off in turn, and in the second bridge circuit (switch elements 2a, 2b, 11a, 11b) switch element 2a.
And 11b and 2b and 11a are sequentially turned on and off. Third bridge circuit (switch elements 2c, 2d, 1
1a, 11b), the switch elements 2c and 11b, 2d and 11a are alternately turned on and off.
【００１７】図２（Ａ），（Ｂ）に出力端子電圧ＵＶ間
（負荷端）電圧および電流波形を示す。各スイッチ素子
２ａ，２ｂ，１１ａと各スイッチ素子２ｂ，２ｄ，１１
ｂの点弧順序を各期間（１）〜（５）に対して、図３に
示すように与えると、出力電圧波形は変圧器１３の作用
により、図２の（Ａ），（Ｂ）に示すように電圧
（Ｅ2）を重畳した出力電圧を出力することが出来る。2 (A) and 2 (B) show the output terminal voltage UV (load end) voltage and current waveforms. Each switch element 2a, 2b, 11a and each switch element 2b, 2d, 11
When the firing order of b is given as shown in FIG. 3 for each period (1) to (5), the output voltage waveform becomes as shown in (A) and (B) of FIG. As shown, it is possible to output an output voltage on which the voltage (E 2 ) is superimposed.
【００１８】重畳する電圧は負荷側の時定数（負荷イン
ピーダンスの状況）の大小により調整することが出来る
方が良いことから、電圧重畳用変圧器１３はタップ付と
する。そのタップ数は負荷側の状況によって決定する。Since it is better that the voltage to be superposed can be adjusted depending on the magnitude of the time constant (load impedance condition) on the load side, the voltage superposing transformer 13 is provided with a tap. The number of taps is determined by the situation on the load side.
【００１９】[0019]
【発明の効果】本発明は、上述の如くであって、電圧形
インバータ電源装置を採用し、出力電流波形の立ち上が
り及び立ち下がりを急峻にした方が良い用途（負荷）に
対して有効である（矩形波に近ずける必要のある負荷に
有効）。また、電縫管用中周波溶接電源装置における溶
接品質（溶接強度、溶接部外観）向上対策として有効で
ある。As described above, the present invention is effective for applications (loads) in which it is desirable to employ the voltage type inverter power supply device and make the rising and falling edges of the output current waveform steep. (Effective for loads that need to approach square waves). It is also effective as a measure to improve the welding quality (welding strength, appearance of welded part) in the medium-frequency welding power supply device for ERW pipe.
【図１】本発明の実施の形態を示す矩形波インバータ電
源装置の回路図。FIG. 1 is a circuit diagram of a rectangular wave inverter power supply device showing an embodiment of the present invention.
【図２】図１の矩形波インバータ電源装置の電圧・電流
特性を示す波形図。FIG. 2 is a waveform diagram showing voltage / current characteristics of the rectangular wave inverter power supply device of FIG.
【図３】図１の矩形波インバータ電源装置の動作電圧波
形図。3 is an operating voltage waveform diagram of the rectangular wave inverter power supply device of FIG.
【図４】従来のインバータ電源装置の回路図。FIG. 4 is a circuit diagram of a conventional inverter power supply device.
【図５】図４のインバータ電源装置の動作電圧波形図。5 is an operating voltage waveform diagram of the inverter power supply device of FIG.
１…直流電源 ２ａ〜２ｃ…スイッチ素子 ４…負荷回路 １０…電圧補償回路部（電圧重畳回路） １１ａ，１１ｂ…スイッチ素子 １３…タップ付変圧器 1 ... DC power supply 2a to 2c ... switch element 4 ... Load circuit 10 ... Voltage compensation circuit section (voltage superposition circuit) 11a, 11b ... switch element 13 ... Transformer with tap
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02M 7/48 H02M 7/5387 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) H02M 7/48 H02M 7/5387
Claims (2)
ムをブリッジ接続して矩形波インバータ装置を構成し、
このインバータ装置にて直流電力を交流電力に変換して
誘導負荷に供給するものにおいて、 前記各アームと同様スイッチ素子を直列に接続して構成
され、前期インバータ装置を構成する各アームと並列接
続された電圧補償回路用のアームと、 前記誘導負荷に接続され、且つ、タップが前期電圧補償
回路用のアーム橋絡点に接続されたタップ付変圧器とで
電圧補償回路を構成し、この電圧補償回路より前記イン
バータ装置の出力電流立ち上がり及び立ち下がり時に電
圧を補償するよう構成したことを特徴とした矩形波イン
バータ電源装置。 1. An arm formed by connecting switch elements in series.
Bridge connection to form a rectangular wave inverter device,
This inverter device converts DC power into AC power
In the case of supplying to an inductive load, it is configured by connecting switch elements in series as with each arm.
In parallel with each arm that composes the inverter device in the previous term
The arm for the continuous voltage compensation circuit is connected to the inductive load, and the tap compensates the voltage in the previous period.
With a tapped transformer connected to the arm bridge for the circuit
A voltage compensating circuit is configured, and the voltage compensating circuit
When the output current of the burner device rises and falls,
Rectangular wave in characterized by being configured to compensate for pressure
Verta power supply.
おいて、前記インバータ装置のスイッチ素子と前記電圧
重畳手段のスイッチ素子が、それぞれ、サイリスタまた
はゲートターンオフサイリスタであることを特徴とする
矩形波インバータ電源装置。 2. The rectangular wave inverter power supply device according to claim 1.
The switching device of the inverter device and the voltage
The switch elements of the superimposing means are thyristors and
Is a gate turn-off thyristor
Square wave inverter power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22326595A JP3371636B2 (en) | 1995-08-31 | 1995-08-31 | Square wave inverter power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22326595A JP3371636B2 (en) | 1995-08-31 | 1995-08-31 | Square wave inverter power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0970175A JPH0970175A (en) | 1997-03-11 |
| JP3371636B2 true JP3371636B2 (en) | 2003-01-27 |
Family
ID=16795409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22326595A Expired - Lifetime JP3371636B2 (en) | 1995-08-31 | 1995-08-31 | Square wave inverter power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371636B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4602310B2 (en) * | 2006-11-07 | 2010-12-22 | 伊藤超短波株式会社 | Electronic therapy device |
-
1995
- 1995-08-31 JP JP22326595A patent/JP3371636B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0970175A (en) | 1997-03-11 |
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