DE2135947A1 - Welding power supply - with multiple capacitor bank and isolating diodes - Google Patents

Welding power supply - with multiple capacitor bank and isolating diodes

Info

Publication number
DE2135947A1
DE2135947A1 DE19712135947 DE2135947A DE2135947A1 DE 2135947 A1 DE2135947 A1 DE 2135947A1 DE 19712135947 DE19712135947 DE 19712135947 DE 2135947 A DE2135947 A DE 2135947A DE 2135947 A1 DE2135947 A1 DE 2135947A1
Authority
DE
Germany
Prior art keywords
thyristor
electrodes
charging
power supply
capacitor
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.)
Pending
Application number
DE19712135947
Other languages
German (de)
Inventor
Grigorij Bogradowitsch Asojanz
Daniil Andreewitsch Dudko
Wasilij Stepanowits Gwosdezkij
Boris Ewgen Ewitsch Paton
Eduard Iwanowitsch Schmakow
Wladik Efimowits Skljarewitsch
Walentin Iwanowitsch Skrypnik
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.)
Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr
Original Assignee
Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr
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 Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr filed Critical Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr
Priority to DE19712135947 priority Critical patent/DE2135947A1/en
Publication of DE2135947A1 publication Critical patent/DE2135947A1/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/162Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/10Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1081Arc welding by means of accumulated energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Arc Welding Control (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

A compact, lightweight unit, for connection to single phase a.c. supply has accurate control of pulse width, p.r.f. and welding current amplitude for pulses of relatively complex shape esp. approx square. The energy storage is in a bank of capacitors each with discharge thyristor feeding the electrodes via a common choke resistor. Each capacitor is charged via a separate isolating diode whose like terminals are commoned to a thyristor connected in turn to the a.c. mains.

Description

SPEISEQUELLE Die Erfindung bezieht sich auf Einrichtungen zum Schweißen von Werkstücken, insbesondere auf Speisequellen, die in Einrichtungen zum Schweißen von Werkstücken verwendet worden. POWER SOURCE The invention relates to welding equipment of workpieces, in particular on supply sources used in welding equipment used by workpieces.

Die Erfindung kann in der Maschinenbauindustrie Verwendung finden, Es sind Speisequellen für Einrichtungen zum Schweißen von Werkstucken bekannt,die einen Lade- und Entladekreis, bestehend aus einem Speicherkondensator und einem Scnalteiement,enthalten, der an die Elektroden der Einrichtung über einen Widerstand bzw. The invention can be used in the mechanical engineering industry, There are sources of power for devices for welding workpieces known that a charging and discharging circuit, consisting of a storage capacitor and a Scnalteiement, included, which is connected to the electrodes of the device via a resistor respectively.

eine Drossel angeschlossen ist.a choke is connected.

Die erwähnten Spelsequellen ermöglichen es nicht, Stromipulse komplizierter Form zu erhalten, Beispielsweise mit allmahlichem bzw. sprungartigem Stromanstieg in der Mitte bzw. am Ende des Impulses sowie die Regelung des Warmezyklus in weiten Grenzen. The mentioned spel sources do not make it possible to make Stromipulse more complicated Maintain shape, for example with a gradual or sudden increase in current in the middle or on End of the impulse as well as the regulation of the heating cycle within wide limits.

Außerdem gestattet die bekannte' Quelle nur die Gewinnung von verhältnismäßig kurzen Stromimpulsen. In addition, the well-known 'source only allows the extraction of proportionately short current pulses.

Indessen erleichtert die Schweißung mit Stromimpulsen komplizierter Form beträchtlich die Lösung vieler technologischer Probleme,beispielsweise das Schneiden von Schlitzen in Blechmaterial,das Schweißen von Konstruktionen aus Kupfer. Meanwhile, the welding with current pulses facilitates more complicated Form considerably the solution of many technological problems, for example that Cutting slots in sheet metal, welding structures made of copper.

Beim Schweißen von Werkstücken aus metallen geringer Dicke sind Stromimpulse von verhältnismäßig großer Dauer bzw. When welding workpieces made of thin metals, there are current pulses of relatively long duration or

Gleichstrom mit Regelung des Wärmezyklus in weiten Grenzen erforderlich.Direct current with regulation of the heat cycle required within wide limits.

Die oben betrachteten Quellen enthalten unbedingt einen Gleichrichter mit einem Transformator, wodurch Gewicht und Kosten erhöht werden. The sources considered above necessarily include a rectifier with a transformer, increasing weight and cost.

zweck der Erfindung ist es,(Lie erwähnten Mängel zu beseitigen. The purpose of the invention is to eliminate the deficiencies mentioned by Lie.

Der Erfindung liegt die Aufgabe zugrunde eine Speisequelle zu schaffen,die es ermöglicht Stromimpulse komplizierter Form, insbesondere rechtecknaher form,zu gewinnen, wobei sie die Regelung des Schweiß-Wärmezyklus in weiten Grenzen sicherstellt und keinen Transformator mit Gleichrichter enthält. The invention is based on the object to provide a supply source that it enables current pulses of a complicated shape, in particular a shape close to a rectangle, to win, whereby it ensures the regulation of the welding heat cycle within wide limits and does not contain a transformer with rectifier.

vliese Aufgabe wird dadurch gelöst,daß die Speisequelle für Einrichtungen zum Dckweißen von Werkstiicken,bei der der Lade-und Entladekreis einen Speicherkondensator und ein Entlade- Schalfelement entht,und an die Elektroden der Einrichtung über eine Drossel bzw. einen Widerstand angeschlossen ist,gemäß der Erfindung mehrere parallel geschaltete Lade- und Entladekreise auf einer Seite enthalt,jeder von welchen eine Trenndiode besitztfiwobeiVdie gleichnamigen Elektroden dieser Dioden miteinander verbunden und an das Nets uber einen Thyristor angeschlossen sind. fleece object is achieved in that the supply source for facilities for the welding of workpieces in which the charging and discharging circuit has a storage capacitor and a discharge Sleeping element entht, and to the electrodes of the device is connected via a choke or a resistor, according to the invention several Contains charging and discharging circuits connected in parallel on one side, each of which an isolating diode has the electrodes of the same name between these diodes and are connected to the nets via a thyristor.

Nachstehend wird die Erfindung durch die Beschreibung von Ausführungsbeispielen und anhand der beigefügten Zeichnungen erläutert.Es zeigen: Fig. 1 - die elektrische Schaltung der erfindungsgemäßen Speisequelle; Fig. 2 - die elektrische Schaltung der erfindungsgema'ßen Speisequellq die zur Gleichstromerzeugung ausgenutzt wird; Fig. 3 a, b, c und d - den zeitlichen Stromverlauf am Ausgang der Quelle,der die Arbeitsweise der Speisequelle erläutert. In the following, the invention is illustrated by the description of exemplary embodiments and explained with reference to the accompanying drawings. They show: Fig. 1 - the electrical Circuit of the supply source according to the invention; Fig. 2 - the electrical circuit the feed source according to the invention which is used to generate direct current; Fig. 3 a, b, c and d - the temporal current profile at the output of the source, which the Function of the supply source explained.

Die Speisequelle für Einrichtungen zum Schweißen von Werkstücken enthält mehrere Lade- und Entladekreise,jeder von welchen aus einem Speicherkondensator 1 (Fig.1),einem Kondensatorentlade-Schaltelement mit Thyristor 2 und einer Trenndiode 3 besteht. The power source for equipment for welding workpieces contains several charging and discharging circuits, each of which consists of a storage capacitor 1 (Fig.1), a capacitor discharge switching element with thyristor 2 and an isolating diode 3 exists.

Die ungleichnamigen Elektroden der Diode 3,des Thyristors 2 und einer der Belage des Kondensators 1 sind in jedem Kreis miteinander verbunden. The unlike electrodes of diode 3, thyristor 2 and one the layers of the capacitor 1 are connected to each other in each circle.

Die Lade- und Entladekreise sind miteinander parallel geschaltet und an das Netz ueber den Enyristor 4 und an die Elektroden 5 und 6 der Schweiß einrichtung - über die Drossel 7 angeschlossen.Anstatt der Drossel 7 kann ein Widerstand verwendet werden. The charging and discharging circuits are connected in parallel with each other and to the network via the enyristor 4 and to the electrodes 5 and 6 of the welding device - connected via the throttle 7. Instead of the throttle 7 a resistor can be used.

in Fig. 2 ist die elektrische Schaltung der Speisequelle zur Erzeugung eines der Form nach dem Gleichstrom nahen Stromes gezeigt.Die Speisequelle besteht aus zwei 1dentischen,vorstehend beschriebenen Schaltungen,die an den Transiormator 8 in Zweiwegschaltung und an die Elektroden 5 und 6 der schweiß einrichtung angeschlossen sind. in Fig. 2 is the electrical circuit of the supply source for generation a current close to the form of the direct current shown. The supply source exists from two 1dentischen circuits, described above, which are connected to the Transiormator 8 in two-way circuit and connected to electrodes 5 and 6 of the welding device are.

Die Speisequelle Suiktioniert folgenderweise. The nourishing source Suiktioniert in the following way.

In der negativen Halbperiode der Speisespannung wird der Thyristor 4 geotinet und die Speicherkondensatoren 1 laden sich auf eine dem Einschaltverzögerungswinkel des Thyristors 4 proportionale Spannung auf.Bei Xnderung der Polarität der Speisespannung öffnen sich nacheinander die Thyristoren 2 und die Spannung der Kondensatoren 1 wird üuer die Induktivität / an die Elektroden 5 und 6 gelegt. In the negative half cycle of the supply voltage, the thyristor 4 geotinet and the storage capacitors 1 charge to one of the switch-on delay angle of the thyristor 4 on proportional voltage. When changing the polarity of the supply voltage the thyristors 2 and the voltage of the capacitors 1 open one after the other is applied to the electrodes 5 and 6 via the inductance.

Durch Auswahl der entsprechenden Anzahl von Ladekondensatoren und der zeit zweier aufeinandertolgender Einschaltungen der Thyristoren 2 kann man Stromimpulse von regelbarer Dauer erhalten. By selecting the appropriate number of charging capacitors and the time of two successive switch-ons of the thyristors 2 can be current pulses of adjustable duration.

Außerdem lassen sich durch die Auswahl des entsprechenden Kondensators bzw. der- entsprechenden Gruppe von Kondensatoren impulse von komplizierter Form (Fig.3a,b) bzw. von nahezu rechteckiger Form (Fig.3c) erhalten. In addition, by selecting the appropriate capacitor or the corresponding group of capacitors pulses of a complicated shape (Fig.3a, b) or of almost rectangular shape (Fig.3c).

Die Regelung der Impuisleistung erfolgt bei der erfindungsgemäßen Speisequelle durch Änderung des Einschaltverzögerungswinkels aes Thyristors 4. The pulse power is regulated in the case of the invention Supply source by changing the switch-on delay angle of aes thyristor 4.

vie Trenndioden 3 sind zur Entkopplung der Kondensatoren 1 erforderlich.Zur Verenfachung der Auslöseschaltung für die Thyristoren 2 kann die Spannung zwischen den negativen Belägen von zwei entsprechenden Ladekondensatoren 1 benutzt werden, wahrend die Auslösung des ersten Thyristors 2 mit hilfe einer der benannten Schaltungen vom Netz im Augenblick der Umpolung uer Speisespannung bewirkt werden kann. vie isolating diodes 3 are required to decouple the capacitors 1 Simplifying the trigger circuit for the thyristors 2 can increase the voltage between the negative deposits of two corresponding charging capacitors 1 are used, during the tripping of the first thyristor 2 with the help of one of the named circuits can be effected by the network at the moment of polarity reversal of the supply voltage.

jie erfineungsgemäße Speisequelle kann direkt an das Netz ohne Transformator angeschlossen werden, wodurch es möglich ist ihre ,çirksschaitlichkeit zu erhöhen und die Abmessungen sowie Gewicht zu verringern. The supply source according to the invention can be connected directly to the network without a transformer connected, which makes it possible to increase their effectiveness and to reduce the dimensions and weight.

Zur gleichen Zeit kann die erfindungsgemaße Speisequelle mit Gleichstrom gespeist werden.Hierbei ist es erforderlich, daß das Einschalten des ersten Thyristors 2 nach der vollen tuf.ladung der Kondensatoren 1 und deren wiederholte Aufladungnach der Entladung des letzten Kondensators 1 geschieht. At the same time, the supply source according to the invention can use direct current This requires that the first thyristor be switched on 2 after the capacitors 1 have been fully charged and then repeatedly charged the discharge of the last capacitor 1 happens.

Die Arbeitsweise der in Fig.3 gezeigten Quelle ist der vorstehend beschriebenen ähnlich.Der Strom an ihrem Ausgang hat die dem Gleichstrom nane Form (fig.3d). The operation of the source shown in Figure 3 is the same as above The current at its output has the same form as direct current (fig.3d).

Die erfindungsgemäße Quelle ermöglicht die Erzeugung von Stromimpulsen komplizierter Form, insbesondere rechzcknaher Form,mit weitgehender Regelung der Impulsdauer,der Impulsfolgefrequenz und der Stromamplitude; sie hat verhältnismäßig kleine Abmessungen,geringe Masse und wird unmittelbar an das Einphasennetz angeschlossen. The source according to the invention enables the generation of current pulses Complicated form, especially near-rectangle form, with extensive regulation of the Pulse duration, the pulse repetition frequency and the current amplitude; she has relatively small dimensions, low mass and is directly attached to the Single-phase network connected.

Claims (1)

SPRUCH Proverb Speisequelle itir Einrichtungen zum Schweißen von Werkstücken, bei der der Lade- und Entladekreis einen apeicherkondensator und ein Kondensatorenladungs-Schaltelement enthält und an die elektroden der Einrichtung über eine Drossel bzw. einen Widerstand angeschlossen ist,d a d u r c h g e k e n n z e i c h n e t, daß die mehrere parallel geschaltete Lade- und Entiadekreise besitzt,jeder von welchen eine Trenndiode (3) enthålt,wobei die gleichnamigen Elektroden dieser Dioden (3) miteinander verbunden und an das Netz uber einen Thyristor (4) gelegt wind. Feed source itir devices for welding workpieces the charging and discharging circuit has a storage capacitor and a capacitor charging switching element contains and to the electrodes of the device via a choke or a resistor connected is that the multiple in parallel has switched charging and discharging circuits, each of which has an isolating diode (3) contains, whereby the electrodes of the same name of these diodes (3) are connected to one another and connected to the network via a thyristor (4).
DE19712135947 1971-07-19 1971-07-19 Welding power supply - with multiple capacitor bank and isolating diodes Pending DE2135947A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712135947 DE2135947A1 (en) 1971-07-19 1971-07-19 Welding power supply - with multiple capacitor bank and isolating diodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712135947 DE2135947A1 (en) 1971-07-19 1971-07-19 Welding power supply - with multiple capacitor bank and isolating diodes

Publications (1)

Publication Number Publication Date
DE2135947A1 true DE2135947A1 (en) 1973-02-01

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DE19712135947 Pending DE2135947A1 (en) 1971-07-19 1971-07-19 Welding power supply - with multiple capacitor bank and isolating diodes

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713045A1 (en) * 1976-03-24 1977-10-06 Inst Elektroswarki Patona FOOD SOURCE FOR WELDING SYSTEMS
AT387740B (en) * 1987-02-23 1989-03-10 Inst Elektroswarki Patona THICKNESS WELDING METHOD AND DEVICE FOR CARRYING IT OUT
DE102009008373A1 (en) * 2009-02-11 2010-08-12 Michaela Hirn Method for spot-welding metallic components, comprises joining welding electrodes of a welding device under use of a contact pressing force at a welding zone using welding unit, and conducting an electric welding current through the zone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713045A1 (en) * 1976-03-24 1977-10-06 Inst Elektroswarki Patona FOOD SOURCE FOR WELDING SYSTEMS
AT387740B (en) * 1987-02-23 1989-03-10 Inst Elektroswarki Patona THICKNESS WELDING METHOD AND DEVICE FOR CARRYING IT OUT
DE102009008373A1 (en) * 2009-02-11 2010-08-12 Michaela Hirn Method for spot-welding metallic components, comprises joining welding electrodes of a welding device under use of a contact pressing force at a welding zone using welding unit, and conducting an electric welding current through the zone
DE102009008373B4 (en) * 2009-02-11 2011-03-03 Michaela Hirn Method for capacitor discharge welding for connecting metallic components and welding unit for carrying out the method

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