Inverter circuit for operating e.g. medium frequency-crucible furnace, has bridge circuits formed as full bridges, where inverter circuit provides single-phase energy for melting material and multi-phase energy for generating motor power

摘要

The inverter circuit has multiple bridge circuits (15) that are formed as full bridges, where the bridge circuits are energized by a direct current or a direct current intermediate circuit. The inverter circuit provides single-phase energy for melting of a material placed in a medium frequency-crucible furnace and provides multi-phase energy for generating electric motor power for mixing liquid molten mass. An independent claim is also included for a method for operating an induction furnace e.g. medium frequency-crucible furnace.