User:Electron9/Test

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The basic setup is an AC power supply that output electricity with low voltage but very high current and high frequency. The workpiece to heat is placed inside an air coil driven by the power supply. The alternating magnetic field induces eddy currents in the workpiece.

Suitable frequency:

Magnetic materials improve the induction heat process because of hysteresis. In essence materials with high permeability (100-500) are easier to heat with induction heating. Hysteresis heating occurs below the curie temperature where materials loose their magnetic properties.

So high permability and temperatures below curie temperature in the workpiece is useful. Also temperature difference, mass, and specific heat influence the workpiece heating.

The energy transfer of induction heating is coupled to the distance between the coil and the workpiece. Energy losses occour through heat conduction from workpiece to fixture, natural convection, and thermal radiation.

The induction coil is usually made of 3.175 mm - 4.7625 mm diameter copper tubing and fluid cooled. Diameter, shape, and number of turns influence the efficiency and field pattern.