by KormagAdmin | Jun 1, 2017 | Ferrite Cores, Ferrite Cores, Ferrite Materials, Soft Ferrite
Why do cores get lapped? What is the surface finish? Lapping is an additional production process used to improve the mating surface. It Is typically done on cores with material permeability of 5000 and greater in order to achieve the maximum AL value for a given...
by KormagAdmin | Jun 1, 2017 | Ferrite Cores, Ferrite Cores, Ferrite Materials, Soft Ferrite
Why do you flat-grind ferrite cores? Cores are flat-ground on the mating surface because of the uneven surface produced during the firing process. It is important for cores to mate with a minimum air gap to keep the gap losses low and to achieve optimum inductance...
by KormagAdmin | Apr 28, 2017 | Ferrite Cores, Ferrite Materials
What is disaccommodation? Disaccommodation, occurring in ferrites, is the reduction of permeability with time after a core is demagnetized. This demagnetization can be caused by heating above the Curie point, by applying an alternating current of diminishing...
by KormagAdmin | Apr 27, 2017 | Ferrite Cores, Flux density, Homogeneous
Why are actual core losses larger than calculated? When calculating the core losses, it is assumed that the structure is homogeneous. In reality, when core halves are mated, there is leakage flux (fringing flux) at the mating surfaces, and the gap losses contribute to...
by KormagAdmin | Apr 10, 2017 | Ferrite Cores, Ferrite Cores, Ferrite Materials
What is a ferrite core? Ferrite cores are dense, homogeneous ceramic structures made by mixing iron oxide (Fe2O3) with oxides or carbonates of one or more metals such as manganese, zinc, nickel, or magnesium. They are pressed, then fired in a kiln to 1300o C, and...
by KormagAdmin | Mar 29, 2017 | Ferrite Cores, Ferrite Materials, Soft Ferrite
Customized ferrite cores … a few things to consider before introducing a new design Custom cores do not necessarily follow published data values. Many parameters must be considered, for example, mechanical tolerances. A figure of +/-2% is a guide due to shrinkage from...
