EP0213689A3 - Plasma torch shutdown circuit - Google Patents

Plasma torch shutdown circuit Download PDF

Info

Publication number
EP0213689A3
EP0213689A3 EP86303754A EP86303754A EP0213689A3 EP 0213689 A3 EP0213689 A3 EP 0213689A3 EP 86303754 A EP86303754 A EP 86303754A EP 86303754 A EP86303754 A EP 86303754A EP 0213689 A3 EP0213689 A3 EP 0213689A3
Authority
EP
European Patent Office
Prior art keywords
operating voltage
plasma torch
shutdown circuit
electrode
power supply
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.)
Withdrawn
Application number
EP86303754A
Other languages
German (de)
French (fr)
Other versions
EP0213689A2 (en
Inventor
Wayman Leon Mollett
Richard A. Spaulding
Raymond G. Wilkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Equipment Co
Original Assignee
Thermal Dynamics Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thermal Dynamics Corp filed Critical Thermal Dynamics Corp
Publication of EP0213689A2 publication Critical patent/EP0213689A2/en
Publication of EP0213689A3 publication Critical patent/EP0213689A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/36—Circuit arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Arc Welding Control (AREA)

Abstract

A plasma torch (11) is supplied with its d.c. operating voltage by a drooping transformer (33) and a rectifier (31), for striking an arc between an electrode (19) and a workpiece (13). If the arc strikes between the electrode and the torch casing (17), the operating voltage drops. A control circuit (51) senses when the operating voltage is below a threshold value and turns off the power supply by opening a solenoid switch (39, 41, 43). This action is briefly disabled each time the power supply is turned on to allow the operating voltage to build up to its normal level, above the threshold.
EP86303754A 1985-09-04 1986-05-16 Plasma torch shutdown circuit Withdrawn EP0213689A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77260685A 1985-09-04 1985-09-04
US772606 1985-09-04

Publications (2)

Publication Number Publication Date
EP0213689A2 EP0213689A2 (en) 1987-03-11
EP0213689A3 true EP0213689A3 (en) 1988-09-21

Family

ID=25095623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86303754A Withdrawn EP0213689A3 (en) 1985-09-04 1986-05-16 Plasma torch shutdown circuit

Country Status (2)

Country Link
EP (1) EP0213689A3 (en)
JP (1) JPS62267080A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0688141B2 (en) * 1988-03-24 1994-11-09 株式会社小松製作所 Double arc prevention cutting method in plasma arc cutting
AUPM471094A0 (en) * 1994-03-25 1994-04-21 Commonwealth Scientific And Industrial Research Organisation Detecting non-symmetrical nozzle wear in a plasma arc torch
AUPM470994A0 (en) * 1994-03-25 1994-04-21 Commonwealth Scientific And Industrial Research Organisation Plasma torch condition monitoring
ES2115542B1 (en) * 1996-07-24 1999-02-16 Iberdrola Sa PLASMA OVEN TORCH POWER SUPPLY.
US5900169A (en) * 1997-06-06 1999-05-04 Hypertherm, Inc. Safety circuit for a blow forward contact start plasma arc torch
US7807937B2 (en) * 2005-01-03 2010-10-05 Illinois Tool Works Inc. Method and system of conserving plasma torch consumable
EP2790205B1 (en) 2009-02-17 2018-04-04 Solvix GmbH A power supply device for plasma processing
CN109709427B (en) * 2018-12-30 2021-09-03 常州九圣焊割设备股份有限公司 Method for detecting faults of consumable parts in plasma arc spray gun

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2151219A5 (en) * 1971-08-26 1973-04-13 Shapiro Ilya Plasma beam arc control - prevents voltage surges
JPS597480A (en) * 1982-07-05 1984-01-14 Matsushita Electric Ind Co Ltd Automatic arc welding machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108048A (en) * 1977-03-04 1978-09-20 Hitachi Ltd Electron beam welding method
JPS6043831B2 (en) * 1980-08-30 1985-09-30 株式会社三社電機製作所 Damage prevention device for plasma arc torch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2151219A5 (en) * 1971-08-26 1973-04-13 Shapiro Ilya Plasma beam arc control - prevents voltage surges
JPS597480A (en) * 1982-07-05 1984-01-14 Matsushita Electric Ind Co Ltd Automatic arc welding machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 90 (M-292)[1527], 25th April 1984; & JP-A-59 007 480 (MATSUSHITA DENKI SANGYO K.K.) 14-01-1984 *

Also Published As

Publication number Publication date
JPS62267080A (en) 1987-11-19
EP0213689A2 (en) 1987-03-11

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Inventor name: SPAULDING, RICHARD A.

Inventor name: MOLLETT, WAYMAN LEON

Inventor name: WILKINS, RAYMOND G.