EP0462929A3 - Method of starting the automatic control of the operating current of a current source on switching-on the circuit - Google Patents

Method of starting the automatic control of the operating current of a current source on switching-on the circuit Download PDF

Info

Publication number
EP0462929A3
EP0462929A3 EP19910810439 EP91810439A EP0462929A3 EP 0462929 A3 EP0462929 A3 EP 0462929A3 EP 19910810439 EP19910810439 EP 19910810439 EP 91810439 A EP91810439 A EP 91810439A EP 0462929 A3 EP0462929 A3 EP 0462929A3
Authority
EP
European Patent Office
Prior art keywords
current
circuit
control
switching
current source
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
EP19910810439
Other languages
German (de)
Other versions
EP0462929B1 (en
EP0462929A2 (en
Inventor
Peter Muntwyler
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.)
Oerlikon Metco AG
Original Assignee
Plasma Tecknik AG
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 Plasma Tecknik AG filed Critical Plasma Tecknik AG
Publication of EP0462929A2 publication Critical patent/EP0462929A2/en
Publication of EP0462929A3 publication Critical patent/EP0462929A3/en
Application granted granted Critical
Publication of EP0462929B1 publication Critical patent/EP0462929B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit
    • 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

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)
  • Arc Welding Control (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Control Of Electrical Variables (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

To start the automatic control of the operating current of a current source when the circuit is switched on, it is proposed to control the current source by presetting the circuit parameters in such a manner that the current produced on switch-on of the circuit tends towards a preset nominal value. The current control is only brought into action when the difference between the actual value and the nominal value of the current drops below a particular limit value. For this purpose, a control device is used which exhibits a voltage controller (7), a current controller (8) and a switch-over device (9) with threshold circuit. The switch-over device (9) generates a switching signal (s) which effects the switching-over from the initial voltage control to the current control as soon as the current exceeds a particular threshold value after the switching-on of the circuit. This makes it possible effectively to avoid switching-on current surges even when the circuit exhibits a current source controlled with an intermittent adjusting effect, for example a current source controlled by phase-control of valves. This effect can be improved further by the current control initially coming into action with an impressed actual value corresponding to the nominal value of the operating current during switch-on. <IMAGE>
EP91810439A 1990-06-18 1991-06-11 Method and apparatus of starting the automatic control of the operating current of a current source on switching-on the circuit Expired - Lifetime EP0462929B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4019355 1990-06-18
DE4019355A DE4019355C1 (en) 1990-06-18 1990-06-18

Publications (3)

Publication Number Publication Date
EP0462929A2 EP0462929A2 (en) 1991-12-27
EP0462929A3 true EP0462929A3 (en) 1992-10-14
EP0462929B1 EP0462929B1 (en) 1996-03-06

Family

ID=6408586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810439A Expired - Lifetime EP0462929B1 (en) 1990-06-18 1991-06-11 Method and apparatus of starting the automatic control of the operating current of a current source on switching-on the circuit

Country Status (5)

Country Link
US (1) US5268831A (en)
EP (1) EP0462929B1 (en)
JP (1) JPH04252311A (en)
AT (1) ATE135121T1 (en)
DE (2) DE4019355C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4329168A1 (en) * 2022-08-23 2024-02-28 Siemens Aktiengesellschaft Regulator circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716332A1 (en) * 1977-04-13 1978-10-26 Plasmainvent Ag POWER SUPPLY UNIT FOR A PLASMA SYSTEM
DE3406251A1 (en) * 1983-02-21 1984-08-23 Mitsubishi Denki K.K., Tokio/Tokyo ARCH WELDING DEVICE OF THE TYPE WITH CONSUMABLE ELECTRODE
DE3528750A1 (en) * 1984-09-26 1986-04-24 Voest-Alpine Ag, Linz Regulating device for a high-power plasma burner, especially for a smelting furnace

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS499818B1 (en) * 1969-04-11 1974-03-06
US3617859A (en) * 1970-03-23 1971-11-02 Nat Semiconductor Corp Electrical regulator apparatus including a zero temperature coefficient voltage reference circuit
US3651333A (en) * 1970-04-02 1972-03-21 Monsanto Co Controller by-pass transfer station for an electron process control servosystem
CH531272A (en) * 1970-08-18 1972-11-30 Siemens Ag Device for controlling line-commutated converters, in particular for systems for high-voltage direct current transmission
DE2649087C2 (en) * 1976-10-28 1983-02-24 Siemens AG, 1000 Berlin und 8000 München Power supply device with two regulated power supply devices connected in parallel on the output side
US4594501A (en) * 1980-10-09 1986-06-10 Texas Instruments Incorporated Pulse width modulation of printhead voltage
JPS59179268A (en) * 1983-03-31 1984-10-11 Mitsubishi Electric Corp Dc arc welding device
IT1184820B (en) * 1985-08-13 1987-10-28 Sgs Microelettronica Spa SINGLE POWER STABILIZED CURRENT GENERATOR, ESPECIALLY FOR MOS TYPE INTEGRATED CIRCUITS
EP0383962A1 (en) * 1989-02-20 1990-08-29 Hauzer Holding B.V. High-voltage rectifier and associated control electronics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716332A1 (en) * 1977-04-13 1978-10-26 Plasmainvent Ag POWER SUPPLY UNIT FOR A PLASMA SYSTEM
DE3406251A1 (en) * 1983-02-21 1984-08-23 Mitsubishi Denki K.K., Tokio/Tokyo ARCH WELDING DEVICE OF THE TYPE WITH CONSUMABLE ELECTRODE
DE3528750A1 (en) * 1984-09-26 1986-04-24 Voest-Alpine Ag, Linz Regulating device for a high-power plasma burner, especially for a smelting furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 38 (M-358)(1761) 19. Februar 1985 & JP-A-59 179 268 ( MITSUBISHI DENKI K.K ) 11. Oktober 1984 *

Also Published As

Publication number Publication date
EP0462929B1 (en) 1996-03-06
ATE135121T1 (en) 1996-03-15
US5268831A (en) 1993-12-07
DE59107499D1 (en) 1996-04-11
JPH04252311A (en) 1992-09-08
DE4019355C1 (en) 1991-09-12
EP0462929A2 (en) 1991-12-27

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