The CMC sample kit from VACUUMSCHMELZE contains a selection of nanocrystalline common mode chokes from the company’s new range, in designs that conform to UL standards.
The kit includes an assortment of two-winding common mode chokes for single-phase applications in flat and upright designs, as well as a number of three- and four-winding chokes for three-phase applications. The chokes are designed for operating currents ranging from 4 to 48 A and for operating voltages from 300 to 1000 V.
VITROPERM is a nanocrystalline alloy used in these chokes, offering a wide permeability range from 5000 to over 150 000, combined with high saturation flux density of 1,2 T. Its material properties typically allow the dimensions of chokes to be reduced by a factor of three in comparison to conventional ferrite chokes. Despite their high inductance, these chokes typically have a low number of turns and large copper cross-section, thereby reducing copper losses and improving system efficiency.
Nanocrystalline common mode chokes deliver broadband attenuation, determined in the low-frequency range by the high level of material permeability and at higher frequencies by the low winding capacitance. In many cases, this broadband attenuation characteristic allows the development of EMI filters with a lower component count by reducing the number of filter stages.
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