Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, where eddy currents (also called Foucault currents) are generated within the metal and resistance leads to Joule heating of the metal. An induction heater (for any process) consists of an electromagnet, through which a high-frequency alternating current (AC) is passed. Heat may also be generated by magnetic hysteresis losses in materials that have significant relative permeability. The frequency of AC used depends on the object size, material type, coupling (between the work coil and the object to be heated) and the penetration depth.
An induction heater is a key piece of equipment used in all forms of induction heating. Typically an induction heater operates at either medium frequency (MF) or radio frequency (RF) ranges. Three main components form the basis of a modern induction heater including the power unit (power inverter), the work head (transformer) and the coil (inductor). Induction heating is a non contact method of heating a conductive body by utilizing a strong magnetic field.
Across International offers a complete line of all solid state energy-saving induction heaters for various purposes. High frequency induction heaters are good for powder, small parts, surface heating, as well as heating from a distance with high efficiency. Mid-frequency are good for mid-size parts heating/melting and surface heating. Low-frequency are designed for large-size parts heating that requires deep heat penetration, they are also great for large amount of gold, silver, copper or ore melting.