JPS55128373A - Welding power source circuit - Google Patents
Welding power source circuitInfo
- Publication number
- JPS55128373A JPS55128373A JP3544979A JP3544979A JPS55128373A JP S55128373 A JPS55128373 A JP S55128373A JP 3544979 A JP3544979 A JP 3544979A JP 3544979 A JP3544979 A JP 3544979A JP S55128373 A JPS55128373 A JP S55128373A
- Authority
- JP
- Japan
- Prior art keywords
- current
- output
- circuit
- voltage
- small
- 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
Links
Landscapes
- Arc Welding Control (AREA)
Abstract
PURPOSE: To make adjustment easy even in a small output region by providing such a means as to make the change ratio of the detection signal for the output in a feedback circuit larger at the small output time than at the large output time.
CONSTITUTION: This welding power source circuit is constituted by a cable 10 in which AC circuit current I flows, a current transformer 11 which induces the current approximately proportional to the current in the cable 10, a diode 12 which rectifies the detection signal connected to a bridge and a voltage drop e1 proportional to the current of the current detecting circuit. Particularly, a non-linear type element 16, such as diode, is connected in series to a resistance 13 between the output ends of the rectifying circuit by the diode 12. If the circuit is made to the above constitution, the secondary output voltage of the current transformer 11 overcomes the forward voltage drop of the element 16. Hence, in the low output region where sufficient secondary current does not flow, the change rate of the detection voltage e2 for the circuit current I becomes larger than the large output region. Namely, in the region where output current and output voltage are small, the change in the output for the change of a reference voltage may be made small and the adjustment for the current or voltage of the small output region requiring fine adjustment becomes easy.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3544979A JPS55128373A (en) | 1979-03-28 | 1979-03-28 | Welding power source circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3544979A JPS55128373A (en) | 1979-03-28 | 1979-03-28 | Welding power source circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55128373A true JPS55128373A (en) | 1980-10-04 |
JPS6317551B2 JPS6317551B2 (en) | 1988-04-14 |
Family
ID=12442122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3544979A Granted JPS55128373A (en) | 1979-03-28 | 1979-03-28 | Welding power source circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55128373A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57115975A (en) * | 1981-01-12 | 1982-07-19 | Hitachi Seiko Ltd | Controller of arc welding machine |
US4739149A (en) * | 1986-10-03 | 1988-04-19 | Obara Corporation | Current sensor for welder conductor |
-
1979
- 1979-03-28 JP JP3544979A patent/JPS55128373A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57115975A (en) * | 1981-01-12 | 1982-07-19 | Hitachi Seiko Ltd | Controller of arc welding machine |
US4739149A (en) * | 1986-10-03 | 1988-04-19 | Obara Corporation | Current sensor for welder conductor |
Also Published As
Publication number | Publication date |
---|---|
JPS6317551B2 (en) | 1988-04-14 |
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