Physical interpretation of Reluctance

[cosmonova]

Hi,

I would like to know what is the physical interpretation of magnetic reluctance.
Also I would like to know why the magnetic flux in a magnetic circuit composed of different magnetic materials should be the same?

Thank you.

 

[don rigby]

we know from ohms law that: e=i times r
when we consider inductors in circuits with frequencies we substitute r with xc (inductive reactance).
the formula is: Xl (inductive reactance)=2 * pie *f (freq.) * L
the only way "the magnetic flux in a magnetic circuit composed of different magnetic materials should be the same" is if, the inductance of the inductors are the same.
ie: ferrous material # 1 has 10 windings, and this inductance is equal to ferrous material # 2 with 12 windings, as material #'2's permiability is lower.

 

[ravenprp]

The physical interpretation of magnetic reluctance is the measure of opposition that a material presents to the formation of a magnetic field. It is similar to electrical resistance in that it describes the difficulty of establishing a magnetic field in a material. Reluctance is dependent on the material's magnetic properties, such as permeability and geometry, and is inversely proportional to the magnetic flux in the material. This means that as reluctance increases, the magnetic flux decreases, and vice versa.

In a magnetic circuit composed of different materials, the magnetic flux should be the same because of the principle of conservation of energy. Just as in an electrical circuit, the total energy input must equal the total energy output, in a magnetic circuit, the total magnetic flux input must equal the total magnetic flux output. This is known as Kirchhoff's law of magnetic circuits. Therefore, the magnetic flux in each material must be the same in order to maintain this balance. As a result, the magnetic field strength will vary in each material depending on its reluctance, but the total magnetic flux will remain constant. This concept is crucial in designing efficient and effective magnetic circuits for various applications.