Magnetic Circuits

Define Permanent Magnet in Magnetic Circuits

Define Permanent Magnet in Magnetic Circuits: Define of Permanent Magnet is an important excitation source (life long) commonly employed for imparting energy to magnetic circuits used in rotating machines and other types of electromechanical devices. There are three classes of permanent magnet materials (or hard magnetic materials) used for permanent magnet dc (PMDC) motors: Alnicos, …

Define Permanent Magnet in Magnetic Circuits Read More »

Hysteresis Loss and Eddy Current Loss in Transformer

Hysteresis Loss and Eddy Current Loss in Transformer: When a magnetic material undergoes cyclic magnetization, two kinds of power losses occur in it Hysteresis Loss and Eddy Current Loss in Transformer which together are known as Core Loss in transformer. The Core Loss in transformer is important in determining heating, temperature rise, rating and efficiency …

Hysteresis Loss and Eddy Current Loss in Transformer Read More »

BH Curve Relationship of Ferromagnetic Material

BH Curve Relationship (Magnetization Characteristic) for Ferromagnetic Material: In free space (also nonmagnetic materials), the permeability μ0 is constant so that BH Curve Relationship is linear. This, however, is not the case with ferromagnetic materials used in electric machines, wherein the BH Curve Relationship of Ferromagnetic Material is strictly nonlinear in two respects saturation and hysteresis. …

BH Curve Relationship of Ferromagnetic Material Read More »

Magnetic Field Equation

Magnetic Field Equation: The exact description of the Magnetic Field Equation Basics is given by the Maxwell’s equations and the constitutive relationship of the medium in which the field is established. Such description apart from being highly complex is otherwise not necessary for use in electric machines wherein the fields (magnetic and electric) are slowly …

Magnetic Field Equation Read More »