Inductor

this is the heating assembly for channel furnaces and casting units. A channel inductor is constructed in a very similar way to a transformer, and comprises a closed iron core/yoke on which are mounted 1 or 2 coils. The channel is arranged as a secondary winding at 90° through the yoke opening. An inductor has a relatively high area output in the channel, in relation to the cross-section and the inner jacket surface of the channel. An 800 kW inductor has a coupling surface of approx. 2.1 m2. The inductor coil for example – at 660 V/50 Hz – has 34 windings with an effective current of approx. 1212 A and this 41,208 ampere windings. The channel consequently has a current level of 41,208 A, since the number of windings is 1. This corresponds to a current density of 1.84 A/mm2. The area outputs are: approx. 890 kW/m2 for the inductor and approx. 380 kW/m2 for a comparable crucible furnace with 3 t capacity and 800 kW out- put.