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JPH079136A Expired / Lapsed JP ⏱️ 0.0 years remaining

Direct current tig welding machine

Assignee: Panasonic Holdings Corp
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Filing: 1992-12-22
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Granted: —
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Expires: 2012-12-22
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 出力極性の切り換え可能な直流TIG溶接装 置において、簡単な構成で正逆両極性のアーク発生の検 出を小電流域から大電流域まで容易に行なう。 【構成】 主回路部1の出力端子間に、カソードを母材 4側の端子に接続し、正極性出力時に出力電圧が無負荷 電圧V 1 で導通しアーク電圧V 2 では非導通となる第1の ツェナーダイオードと、カソードを電極3側の端子に接 続し逆極性出力時に 出力電圧が 無負荷電圧 V 3 で導通し アーク 電圧V 4 では非導通となる第2のツェナーダイオ ードと、第1と第2のツェナーダイオード間に交流信号 用フォトカプラ7を接続することによって、出力極性が 正逆どちらであっても出力電圧値によってアーク発生を 検出することができる。 (57) [Abstract] [Purpose] In a DC TIG welding apparatus with switchable output polarity, arc generation of both positive and reverse polarities can be easily detected from a small current region to a large current region with a simple configuration. [Structure] A cathode is connected to a terminal on the side of the base material 4 between the output terminals of the main circuit unit 1 so that the output voltage becomes conductive at the no-load voltage V 1 and becomes non-conductive at the arc voltage V 2 during positive polarity output. A zener diode of No. 1 and a second zener diode whose cathode is connected to a terminal on the electrode 3 side and whose output voltage conducts at no-load voltage V 3 at the time of reverse polarity output and becomes non-conductive at arc voltage V 4 ; By connecting the AC signal photocoupler 7 between the second Zener diodes, arc generation can be detected by the output voltage value regardless of whether the output polarity is forward or reverse.

Inventors

  • 👤 Norikazu Osaki
  • 👤 憲和 大崎

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-02 22:23
CPC Classifications
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