• Induction heating, stove top, New England Wire Technologies, Litz

    Induction Heating: An Amazing Twist of Technology

    Posted 21 November 2016 12:00 AM by Administrator

    Induction heating is used in nearly countless industrial and manufacturing processes. It has even migrated to consumers' kitchens in the form of electric ranges. To the uninitiated, induction heating may look almost magical at first glance. A specially-designed coil of wire held near a conductive object causes the object to get hot while the coil remains cool. It's a no-contact, no-convection method of inducing heat in any electrically conductive object.

    What Is Induction Heating?

    Induction heating relies on the existence of eddy currents discovered by Léon Foucault in 1855. Briefly, when a changing magnetic field passes through any conductive object, current flow is induced in the object. That current flow creates a secondary electric field in the conductor. The secondary electric field, in turn, produces another flow of current which is known as the eddy current, so named because it flows in a circular pattern, much like water can swirl in a slow-moving stream when it encounters an obstacle. The push-pull between these fields—literally, the kinetic energy caused by electrons being shuttled back and forth—produces heat in the conductor.  

    This use of eddy currents can not only cook a meal; it can melt steel and other metals. 


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