Iron powder cores are pressed from
selected grades of iron mixed with a bonding material. High resistivity is required to
reduce the eddy current losses and for this purpose the iron powder is subjected to an
acid treatment. to produce an insulating layer on the surface of each individual particle.
A feature of the manufacturing process is that minute air gaps occur between the particles
causing the permeability of the iron to be severely reduced. Because of these gaps it is
difficult to saturate iron powder cores, especially those operating in an open magnetic
circuit.
MATERIALS
FERROPERM offer two ranges of Iron
Powder cores -
High frequency powder cores for applications in high Q inductors and wide-band matching
transformers, and high permeability cores with applications in SMPS chokes and for EMI
suppression.
SPECIFICATIONS
for iron dust core compositions
CORE TYPES
FERROPERM can supply the following
types:
- TOROIDS and CYLINDERS
- BALUN CORES
- LEADED MINI-CHOKE CORES
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