发明名称 |
Method and apparatus for producing welding power |
摘要 |
<p>A method or apparatus for sub arc/tubular wire arc welding includes providing a first wire to a first welding arc and a first ac power signal to the first welding arc. The first ac power signal is a substantially constant voltage signal. A second wire may be provided to a second welding arc near the first welding arc, and a second ac power signal is then provided to the second arc. A phase relationship between the first and second ac power signals is selected from a plurality of at least three possible phase relationships. Preferably, the frequency and/or balance of at least one of the signals is selectable. Also, the output frequency is preferably controllable such that it can be more or less than the input frequency. <IMAGE></p> |
申请公布号 |
EP0963805(A2) |
申请公布日期 |
1999.12.15 |
申请号 |
EP19990304355 |
申请日期 |
1999.06.03 |
申请人 |
ILLINOIS TOOL WORKS INC. |
发明人 |
REYNOLDS, JON O.;ZHANG, LIN |
分类号 |
B23K9/073;B23K9/10;(IPC1-7):B23K9/10 |
主分类号 |
B23K9/073 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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