JPS57134269A - Electric power source for welding machine - Google Patents

Electric power source for welding machine

Info

Publication number
JPS57134269A
JPS57134269A JP1812681A JP1812681A JPS57134269A JP S57134269 A JPS57134269 A JP S57134269A JP 1812681 A JP1812681 A JP 1812681A JP 1812681 A JP1812681 A JP 1812681A JP S57134269 A JPS57134269 A JP S57134269A
Authority
JP
Japan
Prior art keywords
switch
control
power source
electric power
welding machine
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
JP1812681A
Other languages
Japanese (ja)
Inventor
Daisaku Morinaga
Nobunori Matsudaira
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 JP1812681A priority Critical patent/JPS57134269A/en
Publication of JPS57134269A publication Critical patent/JPS57134269A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls

Landscapes

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

Abstract

PURPOSE:To provide both control functions of a portable welding machine and multiple welding machines by changing over constant voltage control and constant current control with one unit of electric power source device. CONSTITUTION:A change-over switch 17 changes over the signal to be inputted to an analog-to-digital converter 18 to electric current or voltage. A change-over switch 27 assigns whether constant current control or constant voltage control is to be executed. A counter 20 sets a thyristor firing timing, and a pulse amplifier circuit 11 applies firing pulses to tyristors 2, 3. The state of the switch 27 is loaded via a three state buffer 26 into a microprocessor 22 by which the constant voltage control is executed when the switch 27 is positioned on the VCC side and the constant current control when it is positioned on the opposite ground side.
JP1812681A 1981-02-12 1981-02-12 Electric power source for welding machine Pending JPS57134269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1812681A JPS57134269A (en) 1981-02-12 1981-02-12 Electric power source for welding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1812681A JPS57134269A (en) 1981-02-12 1981-02-12 Electric power source for welding machine

Publications (1)

Publication Number Publication Date
JPS57134269A true JPS57134269A (en) 1982-08-19

Family

ID=11962902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1812681A Pending JPS57134269A (en) 1981-02-12 1981-02-12 Electric power source for welding machine

Country Status (1)

Country Link
JP (1) JPS57134269A (en)

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