| 2007 №05 (03) | 2007 №05 (05) |
The Paton Welding Journal, 2007, #5, 17-20 pages
Investigation of high-voltage control circuits of welding electron beam current
O.K. Nazarenko, V.S. Lanbin
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
High-voltage circuits for control of the welding gun beam current were studied using mathematical computer simulation. It is shown that in the case of using an independent control voltage source the spark breakdown in the emission system is accompanied by a long (about 10 ms) full opening of the emission system, this leading to a surge of current violating weld formation. Control of beam current using an automatic offset eliminates such dangerous current surges after spark breakdowns.
Keywords: electron beam welding, control, beam current, high-voltage circuits, emission system, spark breakdown, transient processes, defects, weld formation
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