What is meant by induction heating of metal raceways and how can you prevent it?

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter35: Harmonics 916
Section: Chapter Questions
Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
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What is meant by induction heating of metal raceways and how can you prevent it?

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The induction heating of metal raceways is as follows:

- Induction heating is the way toward warming an electrically leading item (generally a metal) by electromagnetic acceptance, through warmth created in the article by swirl flows. An acceptance warmer comprises of an electromagnet and an electronic oscillator that passes a high-recurrence exchanging current (AC) through the electromagnet. The quickly substituting attractive field infiltrates the item, producing electric flows inside the conveyor, called swirl flows.

- The swirl flows moving through the obstruction of the fabric heat it by Joule warming. In magnetism (and ferrimagnetic) materials like iron, the heat might likewise be created by enticing physical phenomenon misfortunes. The repeat of current utilised depends upon the item size, material type, coupling (between the work loop and also the item to be warmed) and also the infiltration profundity.

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