JPS5999067U - DC arc welding machine - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来例として示した閉ループ系溶接機における
制御回路のブロック図、第２図は同従来例の出力電流立
ち上がり図、第３図Ｃ′土本考案による制御回路ブロッ
ク図、第４図は本考案による出力電流の立ち上がり図、
第５図は本考案と従来例のアークスタート成功率の比較
データ図である。 １′・・・・・・第１直流電源出力調整部、１″・・・
・・・第２直流電源出力調整部、５・・・・・・リアク
トル、６・・・・・・溶接負荷の母材、８・・・・・・
スイッチ。Fig. 1 is a block diagram of a control circuit in a closed-loop welding machine shown as a conventional example, Fig. 2 is an output current rise diagram of the conventional example, Fig. 3 is a block diagram of the control circuit proposed by C' Tsuchimoto, and Fig. 4 is the rise diagram of the output current according to the present invention,
FIG. 5 is a comparative data diagram of the arc start success rate of the present invention and the conventional example. 1'...First DC power supply output adjustment section, 1''...
...Second DC power supply output adjustment section, 5...Reactor, 6...Base material of welding load, 8...
switch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 変圧器の２次側交流電圧を整流した定電圧特性または準
定電圧特性を有する第１の直流電源出力調整部と溶接負
荷との間にリアクトルを有し、アーク電圧と前記リアク
トル両端電圧とを加えた電圧をフィードバックする閉ル
ープ系の直流アーク溶接機を備え、前記リアクトルを介
さずに直流電源から直接溶接負荷へ電力供給可能な開ル
ープ系の第２、の直流電源出力調整部を有する回路を並
列に設け、起動時は第１と第２の直流電源から概略同時
に溶接負荷へ電力を供給し、第１の直流電源による出力
電流が定常値の６０％以上になった後第２の直流電源か
ら溶接負荷への電力供給を停止するよう切り替え可能な
スイッチを設けたことを特徴とする直流アーク溶接機。A reactor is provided between the welding load and a first DC power supply output adjustment unit having constant voltage characteristics or quasi-constant voltage characteristics obtained by rectifying the secondary side AC voltage of the transformer, and the arc voltage and the voltage across the reactor are A circuit including a closed-loop type DC arc welding machine that feeds back the applied voltage, and a second open-loop type DC power output adjustment section that can directly supply power from the DC power source to the welding load without going through the reactor. They are installed in parallel, and at startup, power is supplied to the welding load almost simultaneously from the first and second DC power supplies, and after the output current from the first DC power supply reaches 60% or more of the steady value, the second DC power supply is supplied to the welding load. A DC arc welding machine characterized by being equipped with a switch that can be switched to stop power supply from the welding load to the welding load.