JPS55112174A - Control unit of direct current arc welding machine - Google Patents
Control unit of direct current arc welding machineInfo
- Publication number
- JPS55112174A JPS55112174A JP2051579A JP2051579A JPS55112174A JP S55112174 A JPS55112174 A JP S55112174A JP 2051579 A JP2051579 A JP 2051579A JP 2051579 A JP2051579 A JP 2051579A JP S55112174 A JPS55112174 A JP S55112174A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- time
- short
- welding current
- output voltage
- 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
Links
Landscapes
- Arc Welding Control (AREA)
Abstract
PURPOSE: To reset the abrupt change of welding current to steady value in a short time and suppress the spattering at the short-circuiting by superposing the output of a comparing amplifier in series to the time constant circuit of a phase shifter which controls the semiconductor element of a power controller.
CONSTITUTION: When the short-circuiting of an electrode 3 and base metal 4 is detected, the over detection signal and reference voltage are compared, causing the output voltage of a comparing amplifier 6 to decrease. Because of this, the voltage between a capacitor 13 and θ terminal decreases and the time for charging the capacitor 13 becomes long. When this voltage reaches the switching voltage of a switching element 16 and the switching element conducts, a semiconductor element is controlled, by which the output voltage of a controller 2 is decreased. In the half cycle from the time when the short-circuit current flows, it resets to the welding current of the steady time. When the welding current decreaes sharply, the output voltage of the comparing amplifier 6 increases and therefore it is reset to the welding current at the setting in the half cycle by the similar control circuit.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2051579A JPS55112174A (en) | 1979-02-22 | 1979-02-22 | Control unit of direct current arc welding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2051579A JPS55112174A (en) | 1979-02-22 | 1979-02-22 | Control unit of direct current arc welding machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55112174A true JPS55112174A (en) | 1980-08-29 |
Family
ID=12029284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2051579A Pending JPS55112174A (en) | 1979-02-22 | 1979-02-22 | Control unit of direct current arc welding machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55112174A (en) |
-
1979
- 1979-02-22 JP JP2051579A patent/JPS55112174A/en active Pending
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