Question

What is the working principle of induction heater?

Answer 1

Induction heating is a non contact method of heating a conductive body by utilising a strong magnetic field. Supply (mains) frequency 50 Hz or 60 Hz induction heaters incorporate a coil directly fed from the electricity supply, typically for lower power industrial applications where lower surface temperatures are required. Some specialist induction heaters operate at 400 Hz, the Aerospace power frequency.

Induction heating should not be confused with induction cooking, as the two heating systems are mostly very physically different from each other. Notably, induction heating (aka forging) systems work with long metallic rods and sheets to bring them up to temperatures as high as ~2500c for work to be done on them.



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