The common iron powder core is composed of carbon-based ferromagnetic powder and resin-based ferromagnetic powder. The price is the lowest among the powder cores. The saturated magnetic induction intensity is about 1.4T, the permeability range is 22-100, the initial permeability is stable with frequency, the DC current superposition performance is good, but the loss is high at high frequency. The initial permeability of iron powder core varies with the intensity of DC magnetic field. Variation of Initial Permeability of Iron Powder Core with Frequency
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