Soft Magnetic Composites for Inductors

Some people have already carried out development and research on the soft magnetic composite material for high-power power supply inductors - magnetic powder core. Below 20kHz, the permeability is basically unchanged. At 1.0T, the permeability is around 100. 50Hz ~ 20kHz loss is small, can be made into a large core with a weight of more than 100kg, and in the audio frequency range of 20kHz, the noise is 10dB lower than that of a ring ferrite core. It can replace silicon steel and soft ferrite in high-power power supplies.