JPS5597884A - Control system of thyristor power source for resistance welding machine - Google Patents
Control system of thyristor power source for resistance welding machineInfo
- Publication number
- JPS5597884A JPS5597884A JP430979A JP430979A JPS5597884A JP S5597884 A JPS5597884 A JP S5597884A JP 430979 A JP430979 A JP 430979A JP 430979 A JP430979 A JP 430979A JP S5597884 A JPS5597884 A JP S5597884A
- Authority
- JP
- Japan
- Prior art keywords
- current
- value
- period
- welding
- firing angle
- 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
- Control Of Voltage And Current In General (AREA)
Abstract
PURPOSE: To control welding current with high accuracy and stably supply the same by beforehand flowing test current to the welding works, obtaining the current supply angle, calculating power factor with a microcomputer and controlling firing angle.
CONSTITUTION: From the above-mentioned test current, the power factor angle ϕL and % current value of the object to be controlled are determined by using a test current characteristic table. The % current value refers to the value which expresses the current in % with the current of the time of firing angle α=0 as 100. At this time, the actual effective current value is also beforehand detected. Next, from this firing angle α, the effective current value actually flowed at the 1st period is measured and based on this data, the firing angle α is so corrected as to be approached to the designated value, thence the welding current of the 2nd period is flowed. Thereafter, the firing angle α is corrected at every period by the similar manner. At this time, the effective value of welding current is detected at every period, but when there is a difference of ±10% or more with respect to the previous period, it is judged to be abnormal operation and the welding is stopped.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP430979A JPS5597884A (en) | 1979-01-17 | 1979-01-17 | Control system of thyristor power source for resistance welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP430979A JPS5597884A (en) | 1979-01-17 | 1979-01-17 | Control system of thyristor power source for resistance welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5597884A true JPS5597884A (en) | 1980-07-25 |
| JPS63157B2 JPS63157B2 (en) | 1988-01-05 |
Family
ID=11580880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP430979A Granted JPS5597884A (en) | 1979-01-17 | 1979-01-17 | Control system of thyristor power source for resistance welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5597884A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61123481A (en) * | 1984-11-19 | 1986-06-11 | Dengensha Mfg Co Ltd | Constant-current control method of resistance welder |
| JPS62107877A (en) * | 1985-11-06 | 1987-05-19 | Miyachi Denshi Kk | Constant current control method in spot welding machine |
-
1979
- 1979-01-17 JP JP430979A patent/JPS5597884A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61123481A (en) * | 1984-11-19 | 1986-06-11 | Dengensha Mfg Co Ltd | Constant-current control method of resistance welder |
| JPH0239350B2 (en) * | 1984-11-19 | 1990-09-05 | Dengensha Mfg Co Ltd | |
| JPS62107877A (en) * | 1985-11-06 | 1987-05-19 | Miyachi Denshi Kk | Constant current control method in spot welding machine |
| JPH0242302B2 (en) * | 1985-11-06 | 1990-09-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63157B2 (en) | 1988-01-05 |
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