JPS5797868A - Transistor driving circuit of dc arc welding machine - Google Patents
Transistor driving circuit of dc arc welding machineInfo
- Publication number
- JPS5797868A JPS5797868A JP17408480A JP17408480A JPS5797868A JP S5797868 A JPS5797868 A JP S5797868A JP 17408480 A JP17408480 A JP 17408480A JP 17408480 A JP17408480 A JP 17408480A JP S5797868 A JPS5797868 A JP S5797868A
- Authority
- JP
- Japan
- Prior art keywords
- output
- capacitor
- welding machine
- base current
- driving circuit
- 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
- Control Of Voltage And Current In General (AREA)
- Arc Welding Control (AREA)
Abstract
PURPOSE: To prevent the breakdown of an output controlling transistor (TR) as an output control element of a welding machine by connecting a capacitor in parallel with a limiting resistance suppressing the base current to said output controlling TR.
CONSTITUTION: When welding is started, an on command is outputted from an output control circuit 7, and a driving transistor (TR)6 switches on. As a result, the base current flows through a capacitor 21 as well only at the moment of the switching on of the TR6 at the same instant when the base current flows from a DC electric power source 4 for driving to the base of an output controlling transistor 2 through a limiting resistance 5. As a result, the TR2 is sufficiently satd. and assumes a switched on state, thereby assuming the state of deriving an output through a main DC power source 1, the TR2 and a DC reactor 3. During welding, the TR2 repeats on and off, but the TR2 is held satd. with the capacitor 21 at all times while it is on, and this makes it possible to prevent its breakdown.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17408480A JPS5797868A (en) | 1980-12-10 | 1980-12-10 | Transistor driving circuit of dc arc welding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17408480A JPS5797868A (en) | 1980-12-10 | 1980-12-10 | Transistor driving circuit of dc arc welding machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5797868A true JPS5797868A (en) | 1982-06-17 |
Family
ID=15972364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17408480A Pending JPS5797868A (en) | 1980-12-10 | 1980-12-10 | Transistor driving circuit of dc arc welding machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5797868A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0492606U (en) * | 1990-12-28 | 1992-08-12 |
-
1980
- 1980-12-10 JP JP17408480A patent/JPS5797868A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0492606U (en) * | 1990-12-28 | 1992-08-12 |
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