What is leakage coefficient?

What is leakage coefficient?

: the ratio of total magnetic flux to useful flux.

What is the value of leakage coefficient?

The value of leakage coefficient varies from 1.15 to 1.25 for electrical machines. Thus, in electrical machines, total flux being known, the useful flux can be determined by assuming a suitable value of the leakage coefficient.

What is the formula of leakage coefficient?

Detailed Solution. Leakage flux is defined as the magnetic flux which does not follow the particularly intended path in a magnetic circuit. 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).

Where does the leakage inductance come from in a transformer?

Leakage inductance. Leakage inductance derives from the electrical property of an imperfectly-coupled transformer whereby each winding behaves as a self-inductance in series with the winding’s respective ohmic resistance constant.

How are leakage inductances defined in a magnetic circuit?

The magnetic circuit’s flux that does not interlink both windings is the leakage flux corresponding to primary leakage inductance L Pσ and secondary leakage inductance L Sσ. Referring to Fig. 1, these leakage inductances are defined in terms of transformer winding open-circuit inductances and associated coupling coefficient or coupling factor .

How is the leakage inductance of a coil reduced?

Leakage inductance is reduced by interleaving, i.e., by dividing the primary or secondary coil into two sections and placing the other winding between the two sections. Interleaving may be accomplished by concentric and by coaxial windings, as shown in Figs. 4B and C. Reduction of leakage inductance is computed from

How does leakage inductance affect total switch loss?

Clearly, as the leakage inductance of the HF transformer increases, the total switching loss decreases due to an increase in the range of ZVS, while the total conduction loss increases with increasing leakage inductance. FIGURE 29.19. Variation of the total switch loss of the dc-ac converter with the leakage inductance of the HF transformer [ 1 ].