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Eddy current generation enhancement using ferrite for electromagnetic acoustic transduction

By S. Dixon and X. Jian

Abstract

Eddy currents are generated in an electrically conducting surface as a step in electromagnetic acoustic transduction (EAT). In eddy current testing, wire coils are often wound onto a ferrite core to increase the generated eddy current. With EAT, increased coil inductance is unacceptable as it leads to a reduction in the amplitude of a given frequency of eddy current from a limited voltage source, particularly where the current arises from capacitor discharge. The authors present a method for EAT where ferrite is used to increase the eddy current amplitude without significantly increasing coil inductance or changing the frequency content of the eddy current

Topics: QC
Publisher: American Institute of Physics
Year: 2006
OAI identifier: oai:wrap.warwick.ac.uk:975

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