What is the primary function of an eddy current drive circuit?

The primary function of an eddy current drive circuit is to produce high-frequency alternating current to generate the necessary magnetic field. This high-frequency alternating current is essential for creating the alternating magnetic fields used in eddy current testing, which relies on the induction of eddy currents in conductive materials.

When the high-frequency alternating current flows through a coil, it generates a changing magnetic field. This magnetic field induces eddy currents in the conductive test material, which can then be analyzed to detect flaws, measure material properties, or assess coating thickness. The interaction between the induced eddy currents and the magnetic field allows for a non-destructive examination of the material’s integrity.

In summary, the production of high-frequency alternating current is critical because it directly facilitates the workings of eddy current testing by generating the magnetic fields needed for inducing eddy currents within the test sample.