JP2763500B2 - Engine driven arc welding machine - Google Patents
Engine driven arc welding machineInfo
- Publication number
- JP2763500B2 JP2763500B2 JP32496694A JP32496694A JP2763500B2 JP 2763500 B2 JP2763500 B2 JP 2763500B2 JP 32496694 A JP32496694 A JP 32496694A JP 32496694 A JP32496694 A JP 32496694A JP 2763500 B2 JP2763500 B2 JP 2763500B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- phase
- stator winding
- voltage
- welding
- 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
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、エンジン駆動アーク溶
接機に係り、とくに溶接電圧を強、弱切り替え得るもの
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine-driven arc welding machine, and more particularly to an arc welding machine capable of switching a welding voltage between high and low.
【０００２】[0002]
【従来の技術】たとえば建設現場などで部材を溶接する
場合、一般にエンジン駆動型アーク溶接機を用いて種々
の寸法および材質の部材を溶接する。2. Description of the Related Art For example, when welding members at a construction site or the like, members of various dimensions and materials are generally welded using an engine-driven arc welding machine.
【０００３】そして、たとえば大型部材を溶接するには
大出力が必要であり、小型部材を溶接するには小出力を
用いるから大小両出力を提供できれば、１台の溶接機で
種々の部材の溶接を行うことができて好都合である。For example, a large output requires a large output to weld a large member, and a small output is used to weld a small member. Therefore, if both large and small outputs can be provided, a single welding machine can weld various members. Can be conveniently performed.
【０００４】[0004]
【発明が解決しようとする課題】しかし、既存の溶接機
は、それぞれ定格に応じた出力を形成するように構成さ
れており、出力の強弱を選択できるものは提供されてい
ない。However, existing welding machines are each configured to produce an output according to a rating, and there is no device capable of selecting the strength of the output.
【０００５】本発明は上述の点を考慮してなされたもの
で、切り替え操作によって出力の強、弱切り替えを行い
得るエンジン駆動アーク溶接機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 has as its object to provide an engine-driven arc welding machine capable of switching between strong and weak outputs by a switching operation.
【０００６】[0006]
【課題を解決するための手段】上記目的達成のため、本
発明では、請求項１記載の、エンジンによって駆動され
る溶接用発電機の固定鉄心に巻装された２組の３相固定
子巻線に交流出力を生じさせ、この交流出力を整流して
溶接出力を形成するエンジン駆動アーク溶接機におい
て、ぜきん２組の３相固定子巻線同士が位相合わせされ
て固定鉄心に設けられ、スター接続された第１および第
２の固定子巻線と、それぞれこれら両固定子巻線の各出
力が与えられて整流し、各整流出力を合成して前記溶接
出力とする第１および第２の整流器と、前記第２の固定
子巻線における１相出力端と前記第１の固定子巻線の中
性点とを相互に接続する連携電路と、この連携電路に設
けられ、該連携電路の接、断を行う切り替えスイッチ
と、をそなえたことを特徴とするエンジン駆動アーク溶
接機、を提供するものである。To achieve the above object, according to the present invention, there are provided two sets of three-phase stator windings wound around a stationary core of a welding generator driven by an engine. In an engine-driven arc welding machine for generating an AC output in a wire and rectifying the AC output to form a welding output, at least two sets of three-phase stator windings are phase-matched and provided on a fixed iron core, Star-connected first and second stator windings, and respective outputs of the two stator windings, respectively, are given and rectified, and the rectified outputs are combined to form the first and second welding outputs. A rectifier, a cooperating circuit for interconnecting a one-phase output terminal of the second stator winding and a neutral point of the first stator winding, and a cooperating circuit provided in the cooperating circuit. Switch that switches on and off the Engine driven arc welder to symptoms, there is provided a.
【０００７】[0007]
【作用】請求項１記載のエンジン駆動型アーク溶接機で
は、切り替えスイッチを切り替えて互いに位相合わせさ
れた第１の固定子巻線と第２の固定子巻線とを接続する
連携電路を接、断することができる。切り替えスイッチ
を開いて連携電路を断にすれば、第１および第２の固定
子巻線は互いに独立であり、それら両固定子巻線の出力
が整流されて合成され、溶接出力となる。次に、切り替
えスイッチを閉じて連携電路を接にすれば、第１の固定
子巻線の中性点に第１の固定子巻線の同相分の第２の固
定子巻線の１相出力端が接続される。これにより、１相
については、第１の固定子巻線の１相電圧と第２の固定
子巻線の対応する相電圧を加え合わせたものに、他の１
相の電圧をベクトル合成した電圧が整流器に出力され
る。この電圧は、より高いものとなる。他の２相につい
ては、切り替えスイッチによる切り替えの前後で出力が
変わらない。したがって、切り替えスイッチの切り替え
操作により、電圧を異ならせた２種類の出力が得られ
る。In the engine-driven arc welding machine according to the first aspect, a changeover switch is switched to connect a cooperative electric path connecting the first stator winding and the second stator winding which are in phase with each other, Can be turned off. If the switch is opened to cut off the link circuit, the first and second stator windings are independent of each other, and the outputs of both stator windings are rectified and combined to form a welding output. Next, if the changeover switch is closed and the associated electric circuit is brought into contact, the one-phase output of the second stator winding for the same phase as the first stator winding is placed at the neutral point of the first stator winding. The ends are connected. Thus, for one phase, the sum of the one-phase voltage of the first stator winding and the corresponding phase voltage of the second stator winding is added to the other one.
A voltage obtained by vector-combining the phase voltages is output to the rectifier. This voltage will be higher. For the other two phases, the output does not change before and after switching by the changeover switch. Therefore, two types of outputs having different voltages can be obtained by the switching operation of the changeover switch.
【０００８】[0008]
【発明の効果】請求項１記載の構成によれば、切り替え
スイッチの切り替え操作により、第１および第２の固定
子巻線の各出力を各別に、あるいは合成して取り出すこ
とにより複雑な切替器を用いることなく溶接出力を強弱
切り替えすることができる。従って、固定子巻線の口出
線の本数は少なくなり、また、弱電流域に強電流域に対
して無負荷電圧を高くし、良好なるアーク特性を得るこ
とが出来る。According to the first aspect of the present invention, a complex switching device is obtained by taking out the outputs of the first and second stator windings individually or by combining them by switching operation of the changeover switch. The welding output can be switched between high and low without using a welding force. Therefore, the number of lead wires of the stator winding is reduced, and the no-load voltage is increased in the weak current region and in the strong current region, so that good arc characteristics can be obtained.
【０００９】[0009]
【実施例】図１は、本発明の一実施例を示す回路図であ
る。この図１に示すように、第１の固定子巻線１および
第２の固定子巻線２は、ともに３相スター接続されてお
り、第１の固定子巻線１の中性点０に第２の固定子巻線
２のＵ相出力端が切り替えスイッチＳＷを介して接続さ
れ得るように構成されている。FIG. 1 is a circuit diagram showing an embodiment of the present invention. As shown in FIG. 1, the first stator winding 1 and the second stator winding 2 are both connected in a three-phase star connection, and are connected to the neutral point 0 of the first stator winding 1. The U-phase output terminal of the second stator winding 2 is configured to be connected via a changeover switch SW.
【００１０】第１の固定子巻線１の３つの各相出力端
は、第１の３相整流器Ｒ１の入力端ａ、ｂ、ｃに接続さ
れており、また第２の固定子巻線２の各相出力端は、第
２の整流器Ｒ２の入力端ａ’、ｂ’、ｃ’に接続されて
いる。The three phase output terminals of the first stator winding 1 are connected to the input terminals a, b, c of the first three-phase rectifier R1. Are connected to the input terminals a ', b', c 'of the second rectifier R2.
【００１１】そして、切り替えスイッチＳＷを開くこと
によって第１の固定子巻線１および第２の固定子巻線２
を切り離せば、両固定子巻線１、２は各別に生じた出力
を整流器Ｒ１，Ｒ２に与える。これにより、各整流器Ｒ
１，Ｒ２は出力端子＋，−間に無負荷電圧６０Ｖ程度の
整流出力を並列供給する。When the changeover switch SW is opened, the first stator winding 1 and the second stator winding 2 are opened.
Are disconnected, the stator windings 1 and 2 apply the separately generated outputs to the rectifiers R1 and R2. Thereby, each rectifier R
1 and R2 supply a rectified output having a no-load voltage of about 60 V in parallel between output terminals + and-.
【００１２】次に、切り替えスイッチＳＷを切り替えて
閉じることによって、第１の固定子巻線１の中性点０に
第２の固定子巻線２のＵ相出力端を接続すると、第１の
固定子巻線１のＵ相固定子巻線ｕ１ならびに第２の固定
子巻線２のＵ相固定子巻線ｕ２およびＶ相固定子巻線ｖ
２が直列接続され、この直列接続回路の出力が第１の整
流器Ｒ１のａ点と第２の整流器Ｒ２のｂ’点に与えられ
る。Next, when the changeover switch SW is switched and closed to connect the U-phase output terminal of the second stator winding 2 to the neutral point 0 of the first stator winding 1, the first U-phase stator winding u1 of stator winding 1 and U-phase stator winding u2 and V-phase stator winding v of second stator winding 2
2 are connected in series, and the output of this series connection circuit is provided to the point a of the first rectifier R1 and the point b 'of the second rectifier R2.
【００１３】この第１の固定子巻線１のＵ相固定子巻線
ｕ１ならびに第２の固定子巻線２のＵ相固定子巻線ｕ２
およびＶ相固定子巻線ｖ２の直列回路は、切り替えスイ
ッチＳＷを開いた強電流域の第１および第２の各固定子
巻線の線間電圧よりも高い電圧を生じるから、第１の整
流器Ｒ１のａ点と第２の整流器Ｒ２のｂ’点との間に
は、特に高い電圧が加わる。この結果、出力端子＋，−
間に無負荷電圧８４Ｖ程度のより高い電圧が生じる。The U-phase stator winding u1 of the first stator winding 1 and the U-phase stator winding u2 of the second stator winding 2
And the series circuit of the V-phase stator winding v2 generates a voltage higher than the line voltage of each of the first and second stator windings in the strong current region in which the changeover switch SW is opened, so that the first rectifier R1 A particularly high voltage is applied between the point a and the point b 'of the second rectifier R2. As a result, the output terminals +,-
A higher voltage, on the order of 84V no-load voltage, occurs in between.
【００１４】図２は、図１の回路におけるスイッチＳＷ
を開いたときを強電流域すなわち大電流低電圧出力と
し、スイッチＳＷを閉じたときを弱電流域すなわち小電
流高電圧出力としたときの、強および弱出力特性を示し
ている。FIG. 2 shows a switch SW in the circuit of FIG.
3 shows the strong and weak output characteristics when the switch is closed and the switch SW is closed and the switch is closed and the switch SW is closed and the switch is closed, respectively.
【００１５】強電流域では大電流を出力するから低電圧
でもアークが安定的に生じるが、弱電流域では電流が小
さくなるから電圧をより高くしないとアークが安定的に
発生しない。そこで、弱電流域では電圧を高くしてアー
クの安定化を図っている。この弱出力特性は垂下傾向が
強く、大電流出力を供給できないのに対し、強出力特性
では垂下傾向が弱く大電流を供給できる。そして強、弱
出力特性の切り替えにより種々の溶接に対応することが
できる。In the high current range, a large current is output, so that an arc is stably generated even at a low voltage. However, in the weak current range, the current is small, and the arc is not stably generated unless the voltage is increased. Therefore, in the weak current region, the voltage is increased to stabilize the arc. This weak output characteristic has a strong drooping tendency and cannot supply a large current output, whereas the strong output characteristic has a weak drooping tendency and can supply a large current. By switching between the strong and weak output characteristics, it is possible to cope with various types of welding.
【００１６】そして、このような強および弱出力を切り
替え出力するために、図１の構成が採られたのである
が、この構成が採られるに到った経緯を図３（ａ）、
（ｂ）ないし図５（ａ）、（ｂ）によって説明する。The configuration shown in FIG. 1 is employed for switching between the strong and weak outputs, and FIG. 3 (a) shows how this configuration was adopted.
This will be described with reference to (b) to FIGS. 5 (a) and 5 (b).
【００１７】図３は、最初になされた構成で、第１およ
び第２の２つの固定子巻線のうち第２の固定子巻線のＵ
相およびＶ相に付加固定子巻線を設け、これら付加固定
子巻線を弱出力時は図３（ａ）に示すようにＵ相固定子
巻線およびＶ相固定子巻線に直列接続し、強出力時は図
３（ｂ）に示すように並列接続している。これにより所
望の電圧が得られる。FIG. 3 shows the first configuration, in which the U of the second stator winding of the first and second two stator windings is shown.
Additional stator windings are provided for the phase and V phases, and these additional stator windings are connected in series to the U-phase stator winding and the V-phase stator winding as shown in FIG. When the output is strong, they are connected in parallel as shown in FIG. Thereby, a desired voltage is obtained.
【００１８】図４は、図３の構成の改良案として提案さ
れたもので、第１の固定子巻線１のＶ相と第２の固定子
巻線２のＵ相とにそれぞれ付加固定子巻線を設けて、こ
れら付加固定子巻線を弱電流域では図４（ａ）に示すよ
うに対応する相に直列接続し、強電流域では図４（ｂ）
に示すように並列接続する構成となっている。FIG. 4 shows a proposal of an improvement of the configuration of FIG. 3, in which an additional stator is added to the V-phase of the first stator winding 1 and the U-phase of the second stator winding 2, respectively. A winding is provided, and these additional stator windings are connected in series to a corresponding phase in a weak current region as shown in FIG.
As shown in FIG.
【００１９】しかし、図３、図４の構成においては、強
電流域と弱電流域の無負荷電圧を切り替えるために固定
子巻線の口出線を複数本出す必要があり、切り替えスイ
ッチの回路も複雑となるばかりでなく、例えば回転電機
子形溶接用発電機ではスリップリングも複数組設ける必
要もあり、磁気的にも問題がある。However, in the configurations shown in FIGS. 3 and 4, it is necessary to provide a plurality of lead wires of the stator winding in order to switch the no-load voltage between the strong current region and the weak current region, and the circuit of the changeover switch is also complicated. Not only that, for example, in a rotating armature welding power generator, it is necessary to provide a plurality of sets of slip rings, and there is a magnetic problem.
【００２０】図５は、このような試行錯誤の後に到達し
た構成であり、図１の実施例と同一構成であり、それ
を、弱出力時および強出力時の接続状態をそれぞれ別個
に図示したものである。FIG. 5 shows the structure reached after such trial and error, which is the same structure as the embodiment of FIG. 1, and shows the connection states at the time of weak output and at the time of strong output separately. Things.
【００２１】すなわち、図５（ａ）は図１におけるスイ
ッチＳＷを閉じて第１の固定子巻線１と第２の固定子巻
線２とを互いに接続した状態を示しており、図５（ｂ）
は図１におけるスイッチＳＷを開いて両固定子巻線１、
２を切り離した状態を示している。That is, FIG. 5A shows a state in which the switch SW in FIG. 1 is closed and the first stator winding 1 and the second stator winding 2 are connected to each other. b)
Opens the switch SW in FIG.
2 shows a state in which 2 has been separated.
【００２２】図６は、図１および図５に示した実施例に
おける固定子巻線電圧を示したものである。いま出力端
子＋，−の直流出力電圧Ｅを６０Ｖとすると、第１およ
び第２の各固定子巻線１、２の線間電圧ｅはｅ＝Ｅ／
１．３４＝４４．８Ｖとなる。一例としての線間ａ−ｂ
の電圧が４４．８Ｖである。線間電圧を４４．８Ｖとす
るには、Ｕ，Ｖ，Ｗ各相の相電圧は２５．９Ｖとなる。
したがって、図６におけるａ−ａ’、ｂ−ａ’、ｃ−
ａ’およびａ’−０、ｂ’−０、ｃ’−０の各相電圧が
２５．９Ｖである。FIG. 6 shows the stator winding voltage in the embodiment shown in FIGS. Assuming now that the DC output voltage E of the output terminals + and-is 60 V, the line voltage e of the first and second stator windings 1 and 2 is e = E /
1.34 = 44.8V. Line ab as an example
Is 44.8V. In order to set the line voltage to 44.8 V, the phase voltage of each of the U, V, and W phases is 25.9 V.
Therefore, aa ′, ba ′, c− in FIG.
Each phase voltage of a 'and a'-0, b'-0, and c'-0 is 25.9V.
【００２３】このような第１および第２の固定子巻線
１、２の出力を、第１の固定子巻線の中性点に第２の固
定子巻線のＵ相出力端を接続して取り出すと、両固定子
巻線からのベクトルの合成電圧が生じる。これが、図５
におけるａ−ｂ’およびａ−ｃ’である。The outputs of the first and second stator windings 1 and 2 are connected to the neutral point of the first stator winding to the U-phase output terminal of the second stator winding. A combined voltage of the vectors from both stator windings results. This is shown in FIG.
And ab 'and ac' in the above.
【００２４】この電圧は図６の３角形Δａｂ’ｏにおけ
るｘであるから、このｘを次式により求める。Since this voltage is x in the triangle .DELTA.ab'o in FIG. 6, this x is obtained by the following equation.
【００２５】ｘ2 ＝（２５．９＋２５．９）2 ＋（２
５．９）2−２×（２５．９＋２５．９）×２５．９×
ｃｏｓ１２０° ｘ＝６８．３（Ｖ） そして、三角形Δａ，ｂ′，ｃ′において、線間電圧ａ
−ｃ′をｙ，ｂ′−ｃ′をｚとすると図６によりｙ＝ｘ
＝６８．３Ｖ、ｚ＝ｅ＝４４．８Ｖである。よってｘ，
ｙ，ｚの整流された溶接出力電圧は、実測電圧波形を積
分して算出すると約８４Ｖになる。X 2 = (25.9 + 25.9) 2 + (2
5.9) 2 -2 × (25.9 + 25.9) × 25.9 ×
cos 120 ° x = 68.3 (V) Then, in the triangle Δa, b ′, c ′, the line voltage a
−c ′ is y and b′−c ′ is z, y = x from FIG.
= 68.3V, z = e = 44.8V. Thus x,
The rectified welding output voltage of y and z becomes approximately 84 V when calculated by integrating the actually measured voltage waveform.
【００２６】図７は、図１および図５に示した本発明の
一実施例の結線を示している。FIG. 7 shows the connection of the embodiment of the present invention shown in FIG. 1 and FIG.
【００２７】上記実施例では、第２固定子巻線２のＵ相
を第１固定子巻線１の中性点に接続するように構成した
が、他の相であっても同様に構成し得るのはいうまでも
ない。In the above embodiment, the U-phase of the second stator winding 2 is connected to the neutral point of the first stator winding 1, but the other phases are similarly configured. It goes without saying that you get it.
【図１】本発明の一実施例の構成を示す回路図。FIG. 1 is a circuit diagram showing a configuration of one embodiment of the present invention.
【図２】図１の構成により得られる溶接電圧−電流特性
を示す図。FIG. 2 is a diagram showing welding voltage-current characteristics obtained by the configuration of FIG.
【図３】本発明の基礎技術を示したもので、同図（ａ）
は弱出力時、同図（ｂ）は強出力時の接続状態を示した
図。FIG. 3 shows the basic technology of the present invention, and FIG.
FIG. 4B is a diagram showing a connection state at the time of weak output, and FIG.
【図４】本発明の基礎技術を示したもので、同図（ａ）
は弱出力時、同図（ｂ）は強出力時の接続状態を示した
図。FIG. 4 shows the basic technology of the present invention, and FIG.
FIG. 4B is a diagram showing a connection state at the time of weak output, and FIG.
【図５】図１に示した本発明の実施例を接続状態別に描
き直したもので、同図（ａ）は弱出力時、同図（ｂ）は
強出力時を示した図。FIGS. 5A and 5B are diagrams in which the embodiment of the present invention shown in FIG. 1 is redrawn for each connection state. FIG.
【図６】図１および図５に示した実施例における第１お
よび第２の固定子巻線の出力電圧を示すベクトル図。FIG. 6 is a vector diagram showing output voltages of first and second stator windings in the embodiment shown in FIGS. 1 and 5;
【図７】図１および図５に示した実施例の結線図。FIG. 7 is a connection diagram of the embodiment shown in FIGS. 1 and 5;
１ 第１の固定子巻線 ２ 第２の固定子巻線 Ｒ１ 第１の整流器 Ｒ２ 第２の整流器 DESCRIPTION OF SYMBOLS 1 1st stator winding 2 2nd stator winding R1 1st rectifier R2 2nd rectifier
Claims (1)
の固定鉄心に巻装された２組の３相固定子巻線に交流出
力を生じさせ、この交流出力を整流して溶接出力を形成
するエンジン駆動アーク溶接機において、 前記２組の３相固定子巻線同士が位相合わせされて固定
鉄心に設けられ、スター接続された第１および第２の固
定子巻線と、 それぞれこれら両固定子巻線の各出力が与えられて整流
し、各整流出力を合成して前記溶接出力とする第１およ
び第２の整流器と、 前記第２の固定子巻線における１相出力端と前記第１の
固定子巻線の中性点とを相互に接続する連携電路と、 この連携電路に設けられ、該連携電路の接、断を行う切
り替えスイッチと、をそなえたことを特徴とするエンジ
ン駆動アーク溶接機。An AC output is generated in two sets of three-phase stator windings wound around a fixed iron core of a welding generator driven by an engine, and the AC output is rectified to form a welding output. In an engine-driven arc welding machine, the two sets of three-phase stator windings are provided on a fixed iron core in phase with each other, and are star-connected with first and second stator windings. First and second rectifiers that receive and rectify the outputs of the windings and combine the rectified outputs to produce the welding output; a one-phase output end of the second stator winding and the first rectifier; An engine drive arc comprising: a cooperating electric circuit for mutually connecting the neutral points of the stator windings to each other; and a changeover switch provided on the cooperating electric circuit for connecting and disconnecting the cooperating electric circuit. Welding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32496694A JP2763500B2 (en) | 1994-12-27 | 1994-12-27 | Engine driven arc welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32496694A JP2763500B2 (en) | 1994-12-27 | 1994-12-27 | Engine driven arc welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08182278A JPH08182278A (en) | 1996-07-12 |
| JP2763500B2 true JP2763500B2 (en) | 1998-06-11 |
Family
ID=18171620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32496694A Expired - Lifetime JP2763500B2 (en) | 1994-12-27 | 1994-12-27 | Engine driven arc welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2763500B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4677812B2 (en) * | 2005-03-30 | 2011-04-27 | 株式会社デンソー | Tandem rotary electric machine |
-
1994
- 1994-12-27 JP JP32496694A patent/JP2763500B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08182278A (en) | 1996-07-12 |
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