JPS56105868A - Square wave power source for tig arc welding - Google Patents

Square wave power source for tig arc welding

Info

Publication number
JPS56105868A
JPS56105868A JP581880A JP581880A JPS56105868A JP S56105868 A JPS56105868 A JP S56105868A JP 581880 A JP581880 A JP 581880A JP 581880 A JP581880 A JP 581880A JP S56105868 A JPS56105868 A JP S56105868A
Authority
JP
Japan
Prior art keywords
power source
resistance
arc current
triac
square wave
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
JP581880A
Other languages
Japanese (ja)
Inventor
Moritaka Shoji
Satoshi Ogura
Hiroshi Miyake
Katsuji Marumoto
Juichiro Usuki
Osamu Demachi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP581880A priority Critical patent/JPS56105868A/en
Publication of JPS56105868A publication Critical patent/JPS56105868A/en
Pending legal-status Critical Current

Links

Landscapes

  • Arc Welding In General (AREA)
  • Arc Welding Control (AREA)

Abstract

PURPOSE: To sufficiently absorb surge only in the high current region of large surge voltage and protect transistors by turning on the switch connected to a surge absorber circuit only at the time of large arc current.
CONSTITUTION: A shunt resistance 41 is inserted and connected between the smoothing reactor 29 of the circuit of the main part of a titled power source and the emitter of transistor 23, and further, a Triac 40 between a resistance 32 and the reactor 29. the AC of this input terminal 15 is rectified to DC by rectifying bridge 20, and this DC is pulsed by a switch 25 consisting of transistors 21W24, whereby square wave arc current waveform is obtained. The signal corresponding to the arc current is fed back from the resistance 41 to the gate of the Triac 40. The capacitor 31 of a CR surge absorber 33 is 50μF and the resistance 32 is 1Ω, and these are so set that the Triac 40 closes automatically when the arc current is ≥100A and opens when it is ≤100A. Thereby, a gate trigger voltage is applied when ≥100A, so that the power source operates well.
COPYRIGHT: (C)1981,JPO&Japio
JP581880A 1980-01-23 1980-01-23 Square wave power source for tig arc welding Pending JPS56105868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP581880A JPS56105868A (en) 1980-01-23 1980-01-23 Square wave power source for tig arc welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP581880A JPS56105868A (en) 1980-01-23 1980-01-23 Square wave power source for tig arc welding

Publications (1)

Publication Number Publication Date
JPS56105868A true JPS56105868A (en) 1981-08-22

Family

ID=11621656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP581880A Pending JPS56105868A (en) 1980-01-23 1980-01-23 Square wave power source for tig arc welding

Country Status (1)

Country Link
JP (1) JPS56105868A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050426A (en) * 2005-08-18 2007-03-01 Daihen Corp Method for ac tig welding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050426A (en) * 2005-08-18 2007-03-01 Daihen Corp Method for ac tig welding

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