Magnetoelastic resonance characterization of core plane assemblies

Abstract

Magnetostrictively induced elastic resonance (MER) of a ferrite core serves as a technique for characterizing the core in the environment of the plane assembly and differentiating core anomalies from wiring induced anomalies not discernable by pulse techniques alone. The shifts of the resonant frequencies as a result of the change in a core from a constrained to an unconstrained mechanical state explains the ability of the MER technique to discriminate unambiguously between damaged and undamaged cores.