EP1530409A3 - Striking circuit of the pilot arc for plasma arc torches - Google Patents

Striking circuit of the pilot arc for plasma arc torches Download PDF

Info

Publication number
EP1530409A3
EP1530409A3 EP04078075A EP04078075A EP1530409A3 EP 1530409 A3 EP1530409 A3 EP 1530409A3 EP 04078075 A EP04078075 A EP 04078075A EP 04078075 A EP04078075 A EP 04078075A EP 1530409 A3 EP1530409 A3 EP 1530409A3
Authority
EP
European Patent Office
Prior art keywords
arc
pilot
impulse generator
striking
pilot arc
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.)
Granted
Application number
EP04078075A
Other languages
German (de)
French (fr)
Other versions
EP1530409B1 (en
EP1530409A2 (en
Inventor
Domenico D'alterio
Ugo Simioni
Marco Montan
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.)
Trafimet SpA
Original Assignee
Trafimet SpA
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 Trafimet SpA filed Critical Trafimet SpA
Publication of EP1530409A2 publication Critical patent/EP1530409A2/en
Publication of EP1530409A3 publication Critical patent/EP1530409A3/en
Application granted granted Critical
Publication of EP1530409B1 publication Critical patent/EP1530409B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • Plasma Technology (AREA)
  • Arc Welding Control (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

A striking circuit of the pilot arc for plasma arc torches (25), comprising a low power impulse generator (27), suitable for striking the pilot arc between the cathode (28) and auxiliary anode (29), which is positioned inside the torch body (25) and kept separate from the direct current generator (20), which feeds both the pilot arc and the main arc, until the arc has been permanently struck; the separation of the part of the circuit in which the low power impulses are present is obtained by using an insulated inductor (37), with a ferrite separation nucleus between the feeder (21) and the torch body (25), and a discharger (41), situated in series with the impulse generator (27), associated with an oscillator and an amplifier, so as to obtain, between the high voltage outlet of the impulse generator (27) and the earth (31), high voltage impulses, having a frequency of about 250 kHz. The electromagnetic emissions are thus reduced during the functioning of the torch (25) and the whole system is more compact, reliable and functional, with respect to the known art.
EP20040078075 2003-11-05 2004-11-05 Striking circuit of the pilot arc for plasma arc torches Expired - Lifetime EP1530409B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI20030218 ITVI20030218A1 (en) 2003-11-05 2003-11-05 TRIGGER CIRCUIT OF THE PILOT ARCH FOR PLASMA ARC LIGHTS.
ITVI20030218 2003-11-05

Publications (3)

Publication Number Publication Date
EP1530409A2 EP1530409A2 (en) 2005-05-11
EP1530409A3 true EP1530409A3 (en) 2006-08-09
EP1530409B1 EP1530409B1 (en) 2014-03-05

Family

ID=34430831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040078075 Expired - Lifetime EP1530409B1 (en) 2003-11-05 2004-11-05 Striking circuit of the pilot arc for plasma arc torches

Country Status (3)

Country Link
EP (1) EP1530409B1 (en)
ES (1) ES2461198T3 (en)
IT (1) ITVI20030218A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305206B6 (en) * 2010-12-31 2015-06-10 Ústav Fyziky Plazmatu Akademie Věd České Republiky, V. V. I. Plasmatron with liquid-stabilized arc
RU2520374C1 (en) * 2013-02-20 2014-06-27 Государственное Научное Учреждение "Институт Физики Имени Б.И. Степанова Национальной Академии Наук Беларуси" Method for pulse length reduction of powerful shf radiation and method for its implementation
CN109982499B (en) * 2019-01-08 2022-10-21 上海硕余精密机械设备有限公司 Arc striking device and method for plasma arc
JP7280527B2 (en) * 2021-10-07 2023-05-24 ダイキン工業株式会社 Discharge device, refrigerant evaluation device, and refrigerant evaluation method
CN114221569B (en) * 2021-12-21 2023-12-01 中国人民解放军国防科技大学 Parallel discharge device and method for plasma high-energy synthetic jet exciter
CN115856397B (en) * 2022-12-09 2023-08-25 哈尔滨工程大学 Discharge voltage measurement auxiliary tool of plasma ignition system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225769A (en) * 1977-09-26 1980-09-30 Thermal Dynamics Corporation Plasma torch starting circuit
US5170030A (en) * 1991-04-08 1992-12-08 Thermal Dynamics Corporation Plasma torch electronic pulsing circuit
US5235162A (en) * 1992-05-26 1993-08-10 Tescom Corporation Plasma pilot arc ignition system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225769A (en) * 1977-09-26 1980-09-30 Thermal Dynamics Corporation Plasma torch starting circuit
US5170030A (en) * 1991-04-08 1992-12-08 Thermal Dynamics Corporation Plasma torch electronic pulsing circuit
US5235162A (en) * 1992-05-26 1993-08-10 Tescom Corporation Plasma pilot arc ignition system

Also Published As

Publication number Publication date
ES2461198T3 (en) 2014-05-19
ITVI20030218A1 (en) 2005-05-06
EP1530409B1 (en) 2014-03-05
EP1530409A2 (en) 2005-05-11

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