Utilization of Electrical Energy And Traction- Ajax Wyatt Furnance

The Ajax Wyatt Vertical core is shown. It has horizontal iron core similar to three phase transformer. the central core passes through the crucible. heat is generated in the charge by the action of heavy induced current which flows in the channel of molten metal situated between an inductor coil and the furnance lining.

Principle of Operation-

Its principle of operation is similar to the transformer in which secondary turns are replaced by a closed loop of molten metal. the primary is an inductor coil wound on the central limb of the laminated core which concentrates the magnetic field.

Working-
The application of ac at mains frequency to the primary inductor coil causes an intense electromagnetic field to fluctuate in the laminated core. the molten metal in the 'V' portion acts as a short circuited secondary coil carrying induced current. heat mainly generated in the 'V' portion because of its high resistance. Due to small section heat is rapidly distributed to the metal above the inductor by convection and by stirring action of electromagnetic forces. the 'V' portion is alwais kept full of metal.

Since the primary and secondary are both on the same central core, it's power factor is better. Due to its heavyweight there is no chance of pinch effect. therefore we can employ the power frequencies with this type of furnance.
It is used for melting the ferrous metals such as brass, zinc, tin etc.