Abstract
A test stand that was previously developed by the University of Missouri to evaluate the energy loss and saturation characteristics of the magnetic core material has been modified to allow nanosecond test measurements of FT-3HS Finemet, a nanocrystalline ferromagnetic material. This paper focuses on the magnetization characteristics of Finemet FT-3HS produced by Hitachi Metals Ltd in the nanosecond regime. In situ diagnostics were utilized to measure the current and voltage on large-area core windings. Utilizing a coaxial transmission line charged up to 100 kV, a square pulse was discharged through a simple winding geometry, on a large-area FT-3HS core. Over multiple trials with several winding topologies and with different test voltages, the saturation energy losses and the saturation field characteristics of the magnetic core material were determined from 40 to 100 ns. These measurements are reported as well as the scaling of data in this regime.
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