Magnetic properties of compressed amorphous powder cores and their application to a fly-back converter

Fe-based amorphous powder cores with glass binder were fabricated by hot-pr essing techniques. The cores exhibited low core losses, relatively low effe ctive permeability and high flux density, which are superior magnetic prope rties when applied to choking coil or fly-back transformers operating in hi gh frequency range. The core obtained was applied to a fly-back converter w orking at 100 kHz, The conversion efficiency examined at output power up to 300 W was higher than that of converters using a typical commercial Sendus t core and a single gap ferrite core.