The article Ferromagnetic material properties is intended to contain a glossary of terms used to describe (mainly quantitatively) ferromagnetic materials, and magnetic cores.
Magnetic core parameters
- Core constant, C1
- Sum of l/A along magnetic path; l is length of a part of the path, A is its cross-section. The summation of the magnetic path lengths of each section of the magnetic circuit divided by the square of the corresponding magnetic area of the same section;
- Core constant, C2
- Sum of l/A2 along magnetic path;
- Effective length of a magnetic path, le;
- Effective cross-section, Ae;
- Effective volume
- ;
- Effective permeability
- For a magnetic circuit constructed with an air gap or air gaps, the permeability of a hypothetical homogeneous material which would provide the same reluctance;
(these "effective" above are sizes of a toroid core made from the same material which has the same magnetic properties as the core);
- Minimum cross-section, Amin;
- Inductance factor, AL
- Inductance of one-turn coil, in nH (note inductance L = ALn2, n is number of turns) Inductance of a coil on a specified core divided by the square of the number of turns. (Unless otherwise specified the inductance test conditions for inductance factor are at a flux density ~10 gauss);
- Turns factor,
- Number of turns for 1 mH (note );
These parameters used e.g. in Philips' handbook [2] and Magnetic Materials Producers Association "Soft Ferrites, A Users Guide".[3]