The Magnetic Properties of a Magnetically Soft Composite Material for Use in the Low-Frequency Range

Abstract

The key magnetic characteristics of a magnetic composite material developed on the basis of ASC 100.29 iron powder and other magnetic composites based on different iron powders are measured and contrasted to the parameters of 3412 electrical steel (type E320). At field strengths up to H = 5–6 kA/m, the magnetic induction in the developed composite material is inferior to that in the electrical steel, whereas the developed composite surpasses the steel at stronger fields. At a field strength H = 25 kA/m, the magnetic induction in the composite material is B_m = 1.95–2.0 T, while for the steel it is B_m = 1.84 T, both materials having the same density of 7.7 g/cm³. We also measure relative magnetization losses in composite materials fabricated using air- and water-atomized iron powders, and the latter, which are purer, are found to exhibit some advantages. Owing to low hysteresis losses, the prepared composite material can be used in electrical machines that operate at higher specific powers and especially in those operating at high rotation velocities—applications in which electrical steels exhibit high losses.