What is the leakage coefficient?

The ratio of the total flux produced to the useful flux set up in the air gap of the magnetic circuit is called leakage coefficient or leakage factor. It is denoted by (λ).

How do we determine the leakage coefficient of a magnetic circuit?

In a magnetic circuit, the magnetic leakage can be described using the leakage coefficient, which can be obtained by dividing the sum of the useful and leakage flux, to the useful flux. Magnetic leakage can be defined as the passage of magnetic flux outside the path along which it can do useful work.

How do you calculate leakage factor?

When a current is passed through a solenoid, magnetic flux is produced by it is calculated using Leakage Factor = Total flux per pole/Armature Flux per pole. To calculate Leakage Factor, you need Total flux per pole (Θflux) & Armature Flux per pole (θa).

What is flux leakage formula?

Leakage flux is defined as the magnetic flux which does not follow the particularly intended path in a magnetic circuit. The total flux in the magnetic circuit is given by, ϕ a = ϕ g + ϕ l.

What is meant by leakage flux?

The part of magnetic flux that does not follow the desired path in a magnetic circuit is known as leakage flux. In most of practical magnetic circuits, the path of a large part of the magnetic flux is through iron part of the magnetic circuit and the rest part of magnetic flux flows through air.

# Leakage Co-efficient

What is meant by leakage reactance?

Definition of leakage reactance

: the part of the reactance of a circuit that corresponds to the leakage flux.

What causes flux leakage?

The principle of flux leakage is used to detect casing corrosion, since flux leakage is caused by rapid changes in the thickness of the casing and by pits and holes in either the internal or external wall. Flux leakage distorts the magnetic-flux lines and induces a signal into an electric coil moving past it.

What is the leakage flux of a transformer?

Leakage Reactance of Transformer

All the flux in transformer will not be able to link with both the primary and secondary windings. A small portion of flux will link either winding but not both. This portion of flux is called leakage flux.

What is MFL inspection?

Magnetic flux leakage (MFL) is a magnetic method of non-destructive testing that is used to detect corrosion, pitting and wall loss in steel structures. Magnetic flux leakage (MFL) is commonly used for inspecting tank floors in the petrochemical industry.

What is flux linkage formula?

The equation for the magnetic flux linkage is: Φ_L=N⋅Φ, where Φ is the magnetic flux and N is the number of coils.

What is leakage factor in groundwater?

Leakage factor is greater than three times the saturated thickness of the aquitard. r/L < or = 0.05 (distance of piezometer from well / leakance factor)

What is meant by leakage inductance?

Glossary Term: Leakage Inductance

Definition. Leakage inductance in a transformer is an inductive component that results from the imperfect magnetic linking of one winding to another. In an ideal transformer, 100% of the energy is magnetically coupled from the primary to the secondary windings.

What is leakage flux and mutual flux?

In a transformer, the mutual flux i.e. the flux that links both primary coil and secondary coil, is a little less than 100%. There is some flux which links only with the primary coil, but not with the secondary coil. This is called primary leakage flux and it contributes to primary leakage reactance.

What is the function of the leakage flux *?

What is the function of the leakage flux? Explanation: The leakage flux produced due to the low reluctance path does not transfer the energy produced. The leakage flux also does not convert the energy in the system.

What is flux and flux linkage?

Flux is the amount of the field through a particular surface. Flux linkage is the fraction of the outgoing flux from the source to the captured flux from the drain. Both of these ideas are very important in fields such as electromagnetic, power and electrical engineering, physics and many more fields.

What do you mean by core flux?

Flux cored arc welding uses heat generated by an electric arc to fuse base metal in the weld joint area. This arc is struck between the metallic workpiece and the continuously-fed tubular cored consumable filler wire, with both the wire and the metallic workpiece melting together to form a weld joint.

What is MFL tools used for?

MFL is used to detect metal loss defects (such as corrosion) in a wide range of settings.

How does an MFL tool work?

MFL uses a powerful magnet to magnetize the conductive material under test (usually steel). Where there are defects — corrosion or material loss — the magnetic field “leaks” from the steel. MFL probes incorporate a magnetic detector placed between the poles of the magnet where it can detect the leakage field.

What is a MFL tool?

In an MFL (or Magnetic Flux Leakage) tool, a magnetic detector is placed between the poles of the magnet to detect the leakage field. Analysts interpret the chart recording of the leakage field to identify damaged areas and to estimate the depth of metal loss.

How can we reduce flux leakage?

Why leakage flux in transformer depends on load current?

Right Answer is:

The value of leakage flux is proportional to the load on the transformer. Since each leakage flux is linked with one winding only, it induces back e.m.f. in that winding, which opposes the current flow in the winding. The greater the leakage flux, the greater the voltage drop.

What is the formula for leakage reactance of transformer?

Measurement of leakage reactance in power transformer

So leakage reactance is termed as, %reactance= (reactance voltage drop/winding voltage)/100.

What is hysteresis loss in transformer?

Hysteresis loss in a transformer occurs due to magnetization saturation in the core of the transformer. Magnetic materials in the core will eventually become magnetically saturated when they are placed in a strong magnetic field, such as the magnetic field generated by an AC current.

What is saturation in magnetic material?

Seen in some magnetic materials, saturation is the state reached when an increase in applied external magnetic field H cannot increase the magnetization of the material further, so the total magnetic flux density B more or less levels off.

What is electric flux density?

Electric flux density is the electric flux passing through a unit area perpendicular to the direction of the flux. Electric flux density is a measure of the strength of an electric field generated by a free electric charge.