JPS55128371A - Welding power source unit - Google Patents

Welding power source unit

Info

Publication number
JPS55128371A
JPS55128371A JP3544479A JP3544479A JPS55128371A JP S55128371 A JPS55128371 A JP S55128371A JP 3544479 A JP3544479 A JP 3544479A JP 3544479 A JP3544479 A JP 3544479A JP S55128371 A JPS55128371 A JP S55128371A
Authority
JP
Japan
Prior art keywords
output
load
time
voltage
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
JP3544479A
Other languages
Japanese (ja)
Other versions
JPS6332544B2 (en
Inventor
Tsuneo Shinada
Yoshio Wakatsuki
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.)
Via Mechanics Ltd
Original Assignee
Hitachi Seiko 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 Seiko Ltd filed Critical Hitachi Seiko Ltd
Priority to JP3544479A priority Critical patent/JPS55128371A/en
Publication of JPS55128371A publication Critical patent/JPS55128371A/en
Publication of JPS6332544B2 publication Critical patent/JPS6332544B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Arc Welding Control (AREA)

Abstract

PURPOSE: To stabilize the output of the feedback system at the following no-load time by directing the output of an SCR gate signal control circuit to the offset level at the time constant larger than the level before no-load at the time when no-load output is emitted owing to the arc break-off of a short time.
CONSTITUTION: The welding voltage controlled by the output control element connected to a main transformer is fed back and compared with a reference voltage. And the welding power supply unit is so constituted that the feedback signal controlling the input of the output control element according to its differential voltage is changed over to the specified voltage when welding arc stops. Hence, even if the no-load voltage owing to arc break-off is generated in a short time, the output at the arc starting does not change with said high no-load voltage and therefore the arc start is stabilized. Even if the no-load voltage of a long time is generated at such a time as starting, the conditions at the starting may be made constant by adjusting the offser level of the feedback circuit and therefore, the rush at the starting and output defficiency may be prevented and stable welding performed.
COPYRIGHT: (C)1980,JPO&Japio
JP3544479A 1979-03-28 1979-03-28 Welding power source unit Granted JPS55128371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3544479A JPS55128371A (en) 1979-03-28 1979-03-28 Welding power source unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3544479A JPS55128371A (en) 1979-03-28 1979-03-28 Welding power source unit

Publications (2)

Publication Number Publication Date
JPS55128371A true JPS55128371A (en) 1980-10-04
JPS6332544B2 JPS6332544B2 (en) 1988-06-30

Family

ID=12441996

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3544479A Granted JPS55128371A (en) 1979-03-28 1979-03-28 Welding power source unit

Country Status (1)

Country Link
JP (1) JPS55128371A (en)

Also Published As

Publication number Publication date
JPS6332544B2 (en) 1988-06-30

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