Eddy Current testing - Quality Inspection Services at Trinity NDT
In Eddy current testing or electromagnetic induction tests, the test object is place in the varying magnetic field of a coil or an array of conductor carrying A. C current. Ac current induces magnetic filed which is constantly varying in both polarity and amplitude every faction of a second. Varying current induced magnetic field which also varies according to the frequency of alternating current. This varying magnetic field induces current in the adjacent conductor which opposes the primary current causing it according to Lenz's Law. This opposing current in turn cancels the primary current that depends on the characteristics of materials being tested. The currents which are swirling like pattern are called Eddy currents. Read more about applications of Eddy current testing at:
http://trinityndt.com/Eddy_NDT.php
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