Conversion device for induction heating based on parallel resonance inverter BRIDGE

摘要

The proposed utility model relates to converter equipment and can be used for induction heating and melting of metals.; The technical result is the generation of single-phase high-frequency conversion device of the electromagnetic field in the step of melting the metal and generating the same two-phase dual frequency conversion device of the electromagnetic field during electromagnetic stirring of molten metal and heating, as well as simplification and reduction of losses.; Conversion device for induction heating based on parallel bridge resonant inverter comprises two rectifier bridges, each consisting of four controlled rectifiers and has a diagonal AC and DC diagonal in series with each control valve includes part throttle oscillatory circuit diagonals DC gate bridges connected a common DC power source so that the controllable valves have been included in the direct voltage ION with respect to the source voltage polarity direct current power supply, to the diagonals AC said first and second rectifier bridges are respectively connected first and second capacitors, and in parallel to each of the capacitors, the first and second poluobmotki inductor are connected, respectively, with each of them made of two parts first and second serially connected to each other, wherein the portion of the side surface poluobmotok crucible two winding inductance of the inductor are disposed along the axis Dr. perpendicular to this axis in the following order: the first part of the first poluobmotki, the first part of the second poluobmotki, the second part of the first poluobmotki, the second part of the second poluobmotki.; The control system in the process of melting of the charge the inductor via controlled valves of the first and second rectifier bridges are formed the high frequency single-phase electromagnetic field, and in the process of the electromagnetic stirring and heating the molten metal via controlled valves of the same first and second rectifier bridges by repeatedly turning on and off valves each phase form a two-phase two-frequency electromagnetic field, namely a low-frequency electromagnetic field with high modulation by frequency, the low frequency electromagnetic field produced by the second valve bridge shifted 90 ° el. in relation to the first-valve bridge. 2 Fct, 2 FIG.