From the induction heating device the alternate current is flowing through the induction coil, in which electromagnetic field is generated.
The work piece's heating speed is dependant from the fields strength and the generators output power. The output power determination is dependent upon our costumers request and from the temperature treatment technology demands. Some technology procedures, especially hard brazing, demand a certain minimum technology times, which can't be reduced more. This concludes that it is not possible to increase the equipment capacity by increasing its mechanical capacities.
Every process like preheating materials for forging or melting materials, demands its specific energy to reach the optimum temperatures. It is best to consider the data of those energies since every material has it's own unique characteristics. If we want to calculate the real device power needed, we should multiply the values from the diagram with the factor from 1,3 up to 1,5. The rule for the rough orientation about the necessary induction heating power is the following: for each mm of the work piece diameter about 1 kW output power is needed.