Induction heating is not new. During the last 30 years thousands of installations have been erected with satisfaction.

Since 1952, AEM has projected and constructed induction generators in the power range from 1 kW up to 1000 kW at frequencies from 1 KHz up to 500 KHz intended for the domestic and international markets, using at each moment the best technology available.

Induction heating is easy and flexible; it is only necessary to bring the copper pipe near to the piece to be heated, and the energy will be transferred to it. There are neither flames, nor contact, the only hot point is the work piece to be processed.

The power is switched on and off in several miliseconds, avoiding system inertias.

The results are clean work pieces, no stray chemical melted agents, and good thermal isolation between piece and coil (it is not a barrier for magnetic flux), which means energy saving.

A coil around the work piece allows us to transfer much more energy density than flames or contacts, giving lower process time (higher production figures and lower surface oxidations).

When comparing induction heating assemblies, the technical and economical data of the different systems must be considered.

Semiconductor inverters are the today's way. Electronics developpement allows the easy control of big amounts of energy, decreasing initial and maintenance costs.

They use switched power semiconductors, with their inherent high efficiency, resulting in generators with efficiency always better than 80 %.

The standard frequencies range from 1 KHz to 10 KHz (medium frequency).

The range 10 KHz to 100 KHz (high frequency) is also available.

The power switching on and off is made through power semiconductors too in several miliseconds with no wear.

They are widely used in forging, melting, surface hardening (depth from 1 mm), soldering and general metal heating.

This is the technology used in the GIS-MF and GIS-AF.