INDUCTION HEATING

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Induction heating is the process in which heat is produces inside a conducting material (magnetic & non-magnetic), according to the Faraday’s law of electro magnetic induction, when ever a conductor is palace in a varying magnetic flux, the EMF (voltage) is induce in that conductor. The work piece of metal that is to be heated is placed with in the work coil, high frequency voltage is applied to the work coil this setup an alternating flux or field. The work piece cuts the flux and voltage is induce in it, which is called eddy current, this eddy current passes through the work piece resulting in heat.

The work works as primary coil of the transformer, while the work piece (which is heated) works as a secondary of the transformer. With this method the heat is produced in steel 50 times faster than heat can be transferred into the metals in the furnace and resulting temperature is more uniform trough out, since higher temperature is used in induction welding.
Non-magneticmaterials are also heated through induction method.

induction heating

Important Features of the Induction heating

  1. The heat is control near the surface of the work coil.
  2. Very high heating rate can be obtained.
  3. Skilled labours are not required of the operation.
  4. At working place there is no smoke and dust.

Applications of induction heating

There is some important application of the indication heating.

  1. Surface harding of steel
  2.  Soldering
  3. Drying of paints
  4. Melting of costly materials.
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