What is the magnetizing current?

What is the magnetizing current?

Magnetization current can be defined as “the portion of the no-load current that is used to establish flux in the core of a transformer“. Generally, when a transformer is energized under no-load conditions, it draws a small amount of current.

What factors does the value of magnetizing current depend on?

How many factors does the value of the magnetizing current depends upon? Explanation: There are 3 factors upon which the magnetizing current depends upon. They are total mmf required, number of turns in the exciting winding and upon the way in which the winding is distributed.

What is magnetizing current test?

Magnetizing Current test on transformer is performed to locate defects in the magnetic core structure, shifting of windings, failure in between turn insulation or problem in tap changers.

What is magnetizing power?

In classical electromagnetism, magnetization is the vector field that expresses the density of permanent or induced magnetic dipole moments in a magnetic material. Movement within this field is described by direction and is either Axial or Diametric.

What is the formula for MMF required for stator teeth?

According to the formula (3), the total value of MMF of the magnetic circuit is FΣ1=430+2·36+2·51+180+3,9=788 А. The saturation coefficient of the magnetic circuit is the ratio of the total MMF of the magnetic circuit FΣ to the total value of MMF of the magnetic circuit in the air gap Fδ.

What is the property of a conservative magnetic field?

A conservative field is one that does the same amount of work on a particle moving between two different points regardless of the path chosen. Magnetic fields do not have such a property. Instead, there is a relationship between the magnetic field and its source, electric current.

What is the effect of current in magnetic particle inspection?

The Effect of Current in Magnetic particle inspection (MPI) is a nondestructive method for locating surface and near-surface defects in ferromagnetic (iron or steel) parts, by magnetizing the parts and indicating any flaws present using finely divided magnetic particles.

Where does the magnetic field generated by a current go?

Since this type of current is passing through zero 120 times per second, the magnetic field it generates is not able to penetrate very far beneath the surface of the part. The current and the field generated stay near the skin of the part, no matter how high the value of current used.

Where are the magnetizing inductances in a transformer?

(magnetizing) inductance, L m, which is placed in parallel with the input voltage. This draws current even when the secondary is open circuited. There are also two much smaller leakage inductance’ s, L l, which are in placed in-between the input voltage and the input to the transformer. High current flows here and even