Sms Siemag Aktiengesellschaft

Sms Group Gmbh

Sms Demag Ag

Andreas Haaks

Christoph Klein

Rolf Degel

Christian Kempe

Thomas Pasch

Roland Koenig

Roland Konig

Roland KÖNIG

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 () and a AC power controller () connected between the transformer () and the electrode () for regulating the current through the electrode (). 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 () 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 () that is opened or closed with the help of a controller as a function of the amount of current flowing through the electrode ().

Electronic circuit and method of supplying electricity

Growing community of inventors

Rheinberg, Germany

Andreas Haaks