JPS57121885A - Method for controlling electric current of resistance welding machine - Google Patents
Method for controlling electric current of resistance welding machineInfo
- Publication number
- JPS57121885A JPS57121885A JP820181A JP820181A JPS57121885A JP S57121885 A JPS57121885 A JP S57121885A JP 820181 A JP820181 A JP 820181A JP 820181 A JP820181 A JP 820181A JP S57121885 A JPS57121885 A JP S57121885A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- work
- source voltage
- angle
- resistance welding
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
PURPOSE:To control the electric current to be supplied to a work to keep always a constant value through a transformer by adjusting the igniting angle of an anti-parallel thyristor provided on the primary side of a welding transformer in a resistance welding machine and controlling the phase of AC source voltage. CONSTITUTION:An anti-parallel thyristor 4 is connected to the primary side winding 8 of a welding transformer 6, and a closed circuit is constituted of electrodes 14 and 14 and the work to the secondary winding of the transformer 6. In the case igniting of controlling the phase of the voltage of an AC power source 2 by adjusting the igniting angle of the anti-parallel thyrister and flowing constant current to the work via the transformer 6 in performing resistance welding by-pressing the work with the electrodes 14 and 14, and conducting electricity, a firing angle correction value is determined from the ratio between the source voltage during welding and reference source voltage and the function expressed by a load power factor angle phi by the equation[I], and the firing angle is adjusted by this correction value, and the phae of the AC source voltage is controlled, whereby the current value to be conducted is controlled to keep a constant value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP820181A JPS57121885A (en) | 1981-01-22 | 1981-01-22 | Method for controlling electric current of resistance welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP820181A JPS57121885A (en) | 1981-01-22 | 1981-01-22 | Method for controlling electric current of resistance welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57121885A true JPS57121885A (en) | 1982-07-29 |
Family
ID=11686643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP820181A Pending JPS57121885A (en) | 1981-01-22 | 1981-01-22 | Method for controlling electric current of resistance welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57121885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656033A (en) * | 2013-03-08 | 2015-05-27 | 上海骏颉自动化设备有限公司 | High-power stepless adjustment load box for power supply performance test |
-
1981
- 1981-01-22 JP JP820181A patent/JPS57121885A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656033A (en) * | 2013-03-08 | 2015-05-27 | 上海骏颉自动化设备有限公司 | High-power stepless adjustment load box for power supply performance test |
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