GB661847A - Improvements in or relating to voltage reducing devices for arc welding systems employing transformers - Google Patents
Improvements in or relating to voltage reducing devices for arc welding systems employing transformersInfo
- Publication number
- GB661847A GB661847A GB29074/49A GB2907449A GB661847A GB 661847 A GB661847 A GB 661847A GB 29074/49 A GB29074/49 A GB 29074/49A GB 2907449 A GB2907449 A GB 2907449A GB 661847 A GB661847 A GB 661847A
- Authority
- GB
- United Kingdom
- Prior art keywords
- welding
- voltage
- coil
- circuit
- contacts
- 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.)
- Expired
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
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1012—Power supply characterised by parts of the process
- B23K9/1031—Reduction of the arc voltage beneath the arc striking value, e.g. to zero voltage, during non-welding periods
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
661,847. Supply systems for welding arcs. HENDRIKS, J., and PLOEG, J. V. D. Nov. 14, 1949 [Sept. 22, 1949], No. 29074/49. Class 38 (iv). To reduce the voltage which can occur at the electrodes of arc welding apparatus when supplied from a welding transformer 1, particularly on open circuit, a choke 4 is included in the primary circuit 2 of the transformer and bridged under the control of a relay 10 having a voltage coil 9 connected across the transformer secondary 3 and a current coil 8 included in the secondary circuit acting in opposition such that upon application of the supply to terminals 11, 12 the voltage coil 9 is energized to open the relay contacts 7, remove the bridge 5 and thereby ensure a reduced voltage at the welding terminals 13, 14 until the striking of the arc and welding current flows, whereupon the secondary voltage falls and allows the contacts to reclose. The subsequent welding current in coil 8 holds the contacts 7 closed to replace the short-circuit on the choke until the welding current ceases. The arrangement avoids saturation and hence over-heating of the relay core.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL661847X | 1949-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB661847A true GB661847A (en) | 1951-11-28 |
Family
ID=19798610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29074/49A Expired GB661847A (en) | 1949-09-22 | 1949-11-14 | Improvements in or relating to voltage reducing devices for arc welding systems employing transformers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB661847A (en) |
-
1949
- 1949-11-14 GB GB29074/49A patent/GB661847A/en not_active Expired
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