发明名称 |
Electronic circuit and method for electric power supply to an alternative current electric furnace |
摘要 |
The invention relates to an electronic circuit and a method for feeding power to at least one electrode of an alternating-current electric-arc furnace, particularly for melting metal. Known circuits of this type typically comprise a series connection with a transformer for providing a supply voltage for the electric-arc furnace from a power grid (1) and a AC power controller (8) connected between the transformer (6) and the electrode (11) for regulating the current through the electrode (11). According to the invention, a further development for such electronic circuits is proposed, which development has a simple design, is inexpensive and prevents overload of the AC power controller (8) even in operating modes of the electric-arc furnaces at high electrode currents. This further development provides to bypass the AC power controller with a bypass switch (9) that is opened or closed with the help of a controller as a function of the amount of current flowing through the electrode (11). |
申请公布号 |
ZA200701679(B) |
申请公布日期 |
2008.04.30 |
申请号 |
ZA20070001679 |
申请日期 |
2007.02.26 |
申请人 |
SMS DEMAG AG. |
发明人 |
KONIG, ROLAND;PASCH, THOMAS;HAAKS, ANDREAS;DEGEL, ROLF |
分类号 |
H05B |
主分类号 |
H05B |
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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