JPS5597877A - Overcurrent protector of direct current arc welding machine - Google Patents
Overcurrent protector of direct current arc welding machineInfo
- Publication number
- JPS5597877A JPS5597877A JP671079A JP671079A JPS5597877A JP S5597877 A JPS5597877 A JP S5597877A JP 671079 A JP671079 A JP 671079A JP 671079 A JP671079 A JP 671079A JP S5597877 A JPS5597877 A JP S5597877A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- charging
- vpt
- vst
- 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 protect the DC power supply against abnormal states by providing an arc voltage detecting element, a time constant circuit consisting of a resistance and capacitor, a driving element, a control element, etc. to the captioned protector.
CONSTITUTION: In the captioned overcurrent protector, the charging voltage Vc of a capacitor C changes and the operation level of the 2nd transistor Tr 2 is beforehand determined and the time reaching for this becomes faster as the voltage Vp is higher and longer as it is lower. The voltage Vp contributing to the charging of the capacitor C is taken from the output of an amplifier IC and the voltage at the point P starts charging to the capacitor C as the 1st transistor Tr 1 goes OFF when the output voltage becomes set voltage or less. This charging voltage is converted to the voltages Vpw, Vpt by the voltages Vsw and Vst at the wire shorting. Because of Vsw > Vst, they become Vpw < Vpt and the voltage Vc of the capacitor C reaches the operation level of the transistor Trp. In the case of the voltage Vst, the gate block circuit operation time becomes faster than the operation time of the case of the voltage Vpt, thus safe current is supplied.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP671079A JPS5597877A (en) | 1979-01-23 | 1979-01-23 | Overcurrent protector of direct current arc welding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP671079A JPS5597877A (en) | 1979-01-23 | 1979-01-23 | Overcurrent protector of direct current arc welding machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5597877A true JPS5597877A (en) | 1980-07-25 |
JPS6260197B2 JPS6260197B2 (en) | 1987-12-15 |
Family
ID=11645839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP671079A Granted JPS5597877A (en) | 1979-01-23 | 1979-01-23 | Overcurrent protector of direct current arc welding machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5597877A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4456813A (en) * | 1982-01-08 | 1984-06-26 | Mitsubishi Denki Kabushiki Kaisha | Hot wire type arc welding system |
-
1979
- 1979-01-23 JP JP671079A patent/JPS5597877A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4456813A (en) * | 1982-01-08 | 1984-06-26 | Mitsubishi Denki Kabushiki Kaisha | Hot wire type arc welding system |
Also Published As
Publication number | Publication date |
---|---|
JPS6260197B2 (en) | 1987-12-15 |
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