Bobart, George F. Induction Heating and Ultrasonic Cleaning Department, Westinghouse Electric Corp., Skyesville, Maryland.
- Heating process
- Power sources
- Process use
- Additional Readings
The heating of a nominally electrical conducting material by eddy currents induced by a varying electromagnetic field. The principle of the induction heating process is similar to that of a transformer. In Fig. 1, the inductor coil can be considered the primary winding of a transformer, with the workpiece as a single-turn secondary. When an alternating current flows in the primary coil, secondary currents will be induced in the workpiece. These induced currents are called eddy currents. The current flowing in the workpiece can be considered as the summation of all of the eddy currents.
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